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MM-1306 - Meritor WABCO

1. 4010385a Figure 2 19 NOTE While the OnGuard system is in Service Alignment mode OnGuard will not track vehicles or operate until the service Alignment procedure is completed Due to this the system will set a DTC SPN 5606 FMI 19 This can be cleared by cycling the key off for a few minutes 1 Before starting the alignment procedure visually verify that the radar sensor is not loose Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 2 Diagnostics Troubleshooting and Testing To correctly inspect the integrity of the radar mounting hardware hold on to the radar and wiggle it back and forth There should not be any physical or visual movement or slack in the radar or radar mounting bracket Ensure there is at least 1 4 inch 6 35 mm of clearance between the radar sensor and the bumper in all directions Contact between the radar sensor and bumper can cause damage to the radar sensor 2 Use TOOLBOX Software to send a diagnostic command to put the OnGuard system into the service alignment mode While in this mode the OnGuard display will show the progress of the alignment process as shown in Figure 2 20 RADAR ALIGNMENT service Alignment In Progress _ CT 20 4010386a 3 Drive the vehicle on a straight road above 30 mph 48 kph The road should have telephone poles signposts and other non moving objects along the roadside There must also be other traffic on the road either on coming
2. Verify correct ABS ECU is installed OnGuard J1939 Electronic Brake Controller Verify the ABS ECU is connected to the J1939 System Disabled 1 EBC1 message from the ABS network and is functional not received or intermittent k 907 Pope Pope a 1590 a Verify correct ABS part number is used Cycle ignition to clear DTCs after ABS servicing OnGuard Incorrect J1939 EBS Brake Switch Use Meritor WABCO TOOLBOX Software System Disabled data received in EBC1 message PC Diagnostics to test the ABS Brake Pedal from ABS Pressure Sensor Verify the correct radar part number is installed on the vehicle Verify the correct ABS ECU part number is used on the vehicle Cycle the ignition to clear DTCs after ABS servicing OnGuard Incorrect J1939 ABS Fully Use Meritor WABCO TOOLBOX Software system Disabled Operational data received in EBC1 PC Diagnostics to test the Anti Lock Braking message from ABS System Verify the correct radar part number is installed on the vehicle Verify the correct ABS ECU part number is used on the vehicle Cycle the ignition to clear DTCs after ABS servicing OnGuard J1939 Adaptive Cruise Control 1 Verify the correct OnGuard radar part System Disabled ACC1 message from the engine number is installed on the vehicle not received or intermittent Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM has the Adaptive Cruise Control
3. 2 The following radar sensor harness check should be performed when various DTCs occur Refer to the Troubleshooting Guide and the Diagnostic Trouble Code Table for further information Disconnect the radar harness connector and perform the following procedures 1 Key On Engine Off Check Pin 1 power to Pin 8 ground for 12 volts e f the power shows 12 volts go to step 2 e lf the power is less than 12 volts trace and inspect the harness for severe abrasion or kinks that might crush or cut wires and check all connections for corrosion or connector damage If any damage is found replace as necessary 2 Repeat this procedure for Pin 2 Ignition to Pin 8 ground 3 Key Off Engine Off Check Pin 8 ground to chassis for resistance of less than 1 ohm e f the resistance is less than 1 ohm go to step 4 e lf the resistance is higher than 1 ohm trace and inspect the harness for severe abrasion or kinks that might crush or cut wires and check all connections for corrosion or connector damage Over tightened tie wraps may cause this type of damage If any damage or corrosion is found repair and replace as necessary Clean connector corrosion using electrical contact cleaner 4 Key On Engine Off Perform a load test across Pins 1 and 8 e lf good go to step 5 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 31 2 Diagnostics Troubleshooting and Testing e f bad trace and inspect the har
4. A Save As screen will then come up asking you to name the 1 Goto J1939 Bus Monitor in the TOOLBOX Software file and select where it will be saved Figure 2 13 specific Utilities menu messages can also be viewed after saving the file by clicking on Load Saved Data and then highlighting the desired 2 To capture a log file click on Start Logging Figure 2 11 A message Figure 2 14 single log file will capture up to five minutes of information To pause a log file click on Pause to resume logging click on Resume Once the required data has been captured click on Stop Logging Figure 2 12 Ontaiard Radar 11934 hata nal PGN SA DA Dats Pier 115029 Daa Save at lye eter taaban Ling File b5 Harij 12A Dita 4008879a Description Figure 2 13 Dak a 400887 7a a Orbierd Radar 11939 Data Figure 2 11 FF FF C FF FF FF FF 17 4 FF CF PFEF FF CF FF FF FF AAN Fa oA PE OOOO GOOL 1E FE F WONS FFI 2A PF PF TF 0000000000 00 AGES FFA 2a FF OO 000D O0 00 oo 0 AAAA Fres A FF UO U a S REAL MESSAGES waria FERF OA FF OFF PP RRP PAPE RP UIF SALLE 20 24 FF MM OM CP 1B FF IF Pf 2A PF FFF OOO oon ht AFF Wo Tire a fa 2A 00 00 60 00 00 00 SF oF ine PUN SADA Dota Se PERL a CF FF EF FF CP PF EF FE a r FR 2A FR 00000000C 1 FF IF AAA FRO i Laje En aida Frai 2A FF FF 7F OOD 00000000 3a FF22 2A FF 0000000000000000 Eo O 0 0 0 SE Dati F FF FF FS
5. Radar sensor is looking and fascia too low e Perform Service Alignment This code may indicate the radar installation was damaged by impact frame cross member bumper radar bracket etc This code may also indicate a Radar Service Alignment was not completed following axle alignment Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 25 2 Diagnostics Troubleshooting and Testing Display a a ioe System Reaction Cause Description Action Repair Instructions 917530 13 Amber Radar Alignment Alignment monitoring failed in e Check for damage to radar sensor bracket Failed Low azimuth Radar sensor is looking and fascia too high e Perform Service Alignment This code may indicate the radar installation was damaged by impact frame cross member bumper radar bracket etc This code may also indicate a Radar Service Alignment was not completed following axle alignment 517558 4 Amber OnGuard Electrical supply voltage too low e Verify that the voltage at the radar sensor System Disabled connector is greater than 6 VDC with a 1 amp load e g tail light or marker light bulb e Inspect the radar connector for corrosion e Inspect each of the power connections between the ignition switch and the radar to determine where loss of power may be occurring 517559 3 Amber OnGuard Electrical supply voltage too high Monitor the battery voltage to determine if the oystem Disabled battery is providing voltage
6. System Error BLOCKED RADAR REMOVE DEBRIS SPN FMI Count 517503 14 2 4010633a Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 7 2 Diagnostics Troubleshooting and Testing Troubleshooting Display Message Repair Action section Radar not aligned Perform Radar Sensor Service Radar Sensor Alignment using TOOLBOX Software Ignition Alignment cycle may be required to clear the fault and RADAR ALIGNMENT restore system function Radar Not Aligned start Alignment Process 0 4010385a Diagnose with TOOLBOX Software and TOOLBOX Diagnostic Trouble Code Table to determine software and System Error system error Diagnostic Trouble Code Table OnGuard DISABLED SERVICE VEHICLE SPN FMI Count 5606 19 2 4011863a Diagnose with TOOLBOX Software and TOOLBOX Diagnostic Trouble Code Table to determine software and WARNING reason for disabled CMS Diagnostic Trouble Code Table OnGuard DISABLED SERVICE VEHICLE 4010406a Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 2 Diagnostics Troubleshooting and Testing Troubleshooting Display Message Repair Action section Communication between the radar and display is Display Harness interrupted Troubleshoot harnesses between Electrical Checks and radar and display Diagnose J1939 wiring Radar Harness harness power and ground Electrical Checks DATA ERROR RADAR OFF LINE 4010390a Diagnose J1939 wiring harness Electrical Sys
7. This code may indicate the engine has recognized a radar malfunction e g blocked radar and has disabled Cruise Control This code may also indicate the engine is not configured for operation with an Adaptive Cruise Control system J1939 Advanced Emergency Braking System 2 AEBS2 message from the OnGuard display or instrument cluster not received or intermittent Incorrect J1939 Driver activation demand for Advanced Emergency Braking System data received in AEBS2 message from OnGuard display or instrument cluster Incorrect J1939 AEBS2 Message Counter data received in AEBS2 message from OnGuard display or instrument cluster Incorrect J1939 AEBS2 Message Checksum data received in AEBS2 message from OnGuard display or instrument cluster System Reaction Cause Description Action Repair Instructions e Verify the fault is active at all times by cycling the key off for 2 to 3 minutes and powering it back up to see if the fault code is still active Verify there are no faults in any system on the vehicle and repair all other faults before diagnosing the OnGuard system Check for multiple active DTCs in the radar lf there is more than one active code repair all other codes then cycle the ignition to clear the error recognition in the engine lf this is the only active DTC instruct the dealer to verify with the engine manufacturer that the engine parameters are set correctly Check any opt
8. f power shows less than 12 volts trace and inspect the harness for severe abrasion or kinks that might crush or cut wires and check all connections for corrosion or connector damage If damage is found repair and replace as necessary Key Off Engine Off Check Pin 5 ground to chassis for resistance of less than 1 ohm e lf the resistance is less than 1 ohm go to step 3 e f the resistance is higher than 1 ohm trace and inspect the harness for severe abrasion or kinks that might crush or cut wires and check all connections for corrosion or connector damage If damage is found repair and replace as necessary Key On Engine Off Perform a load test across Pins 4 and 5 e f good go to step 4 e f bad trace and inspect the harness for severe abrasion or kinks that might crush or cut wires and check all connections for corrosion or connector damage If damage is found repair and replace as necessary Key Off Engine Off Check across Pins 7 and 6 SAE J1939 for resistance of 60 ohms e f the resistance is 120 ohms check the two termination resistors Each should measure 110 130 ohms across the resistor pins If each individual resistor does not measure 110 130 ohms replace the bad termination resistor e Check harness SAE J1939 circuits for open or shorts If the resistance between Pins 7 and 6 is greater than 130 ohms both SAE J1939 circuits are open or both termination resistors are missing Repair and repl
9. may be required to clear the secondary DTC VDY velocity correction factor is Out Check speed signal parameters in engine of Range braking system and tachograph Unknown error during alignment software did not respond on time Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 e Perform Service Alignment 2 Diagnostics Troubleshooting and Testing Display or ee ae System Reaction Cause Description Action Repair Instructions 917527 13 Amber Radar Alignment Alignment monitoring failed in e Check for damage to radar sensor bracket Failed Left azimuth Radar sensor is looking and fascia too far to the right e Perform Service Alignment This code may indicate the radar installation was damaged by impact frame cross member bumper radar bracket etc This code may also indicate a Radar Service Alignment was not completed following axle alignment 517528 13 Amber Radar Alignment Alignment monitoring failed in e Check for damage to radar sensor bracket Failed Right azimuth Radar sensor is looking and fascia too far to the left e Perform Service Alignment This code may indicate the radar installation was damaged by impact frame cross member bumper radar bracket etc This code may also indicate a Radar Service Alignment was not completed following axle alignment 517529 13 Amber Radar Alignment Alignment monitoring failed in e Check for damage to radar sensor bracket Failed High azimuth
10. the radar sensor will have limited or no functionality If a Radar Blocked error occurs the screen in Figure 2 17 or Figure 2 18 will be presented on the OnGuard display System Error OnGuard DISABLED SERVICE VEHICLE SPN FMI Count 517503 14 2 4010632a Figure 2 17 System Error BLOCKED RADAR REMOVE DEBRIS SPN FMI Count 517503 14 2 4010633a Figure 2 18 2 Diagnostics Troubleshooting and Testing If this occurs perform the following procedure Determine if the radar sensor is blocked by snow ice dirt or anything else 2 Clean the surface of the fascia and between the fascia and the radar sensor Remove any foreign debris that may form in this area Removal of the fascia may be necessary to completely remove the radar sensor and the inside of the fascia Do not remove the radar 3 Verify the fascia is correctly installed 4 Cycle the ignition OFF for one minute to clear the fault The vehicle must be driven to determine if the fault has been corrected Radar Sensor Service Alignment lf the radar sensor needs to be replaced the radar sensor mounting system has become damaged or has loosened or new radar sensor software has been installed a Radar Sensor Service Alignment will need to be performed lf a Radar Sensor Service Alignment is required the Radar Not Aligned Screen may be displayed as shown in Figure 2 19 RADAR ALIGNMENT Radar Not Aligned start Alignment Process eS 0
11. 2 16 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 13 2 Diagnostics Troubleshooting and Testing OnGuard Radar Diagnostic Trouble Code Table The following table provides repair instructions and the corresponding Troubleshooting Sections in this manual for SPN FMI DTCs that are readable using TOOLBOX Software If the display shows a code not listed in the table contact the Meritor OnTrac Customer Call Center at 866 OnTrac1 668 7221 for assistance Table B Diagnostic Trouble Code Table Display FMI Color 70 19 OnGuard system Disabled Amber 5 hk k hk CO CO i CO OnGuard system Disabled Amber OnGuard system Disabled Amber OnGuard system Disabled Amber 188 OnGuard system Disabled Amber 188 CO OnGuard system Disabled Amber Incorrect J1939 Parking Brake Switch data received in CCVS1 message from engine ECM body cab or chassis controller Incorrect J1939 Wheel Based Vehicle Speed data received in CCVS1 message usually from engine ECM Incorrect J1939 Cruise Control Set speed data received in CCVS1 message usually from engine ECM Incorrect J1939 Accelerator Pedal Position 1 data received in EEC2 message usually from engine ECM also possible in body cab or chassis controller J1939 Engine Configuration 1 EC1 message not received or intermittent Incorrect J1939 Engine Speed At Idle data received in EC
12. FF FF 03 FF 4008880a Figure 2 14 4008878a Figure 2 12 12 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 2 Diagnostics Troubleshooting and Testing Displaying Parameter Decoder Information To display Parameter Decoder information from the Display menu select Parameter Decoder Figure 2 15 D E g Saard P Collision Mitigation System Ep Porthumbo I rivalin Motard Trmal Maes j Fisphe Felei Talte ae iee gan haere APAR Variron Numba Tate of Predici 4012510a Figure 2 15 Information from the radar will be displayed on the screen The Event Counters for Forward Haptic Collision Warnings and Collision Mitigation Braking will display the total number of times these events occurred during the lifetime of the radar The Last Event Record will display the information from the last occurrence of Haptic Collision Warnings and Collision Mitigation Braking Meritor WABCO recommends entering the Fleet Name Unit ID and Odometer before saving the file for correct identification Figure 2 16 Last Evert Record OnGuard Vehicle Haptc Colision Wamings Collision Mitigation Braking Odometer mies Host Speed MPH Host Acceleration g Accelerator Pedal Postion X Brake Pedal Position x Cuise Cortrol Collision Object Haptic Collision Wamings Colision Mitigation Braking Distance to Object ft Object Speed MPH Object Acceleration fg Qose 4012511a Figure
13. Instructions Verify no visible physical damage to radar Check power ground and load test at the radar harness connector lf fault persists after completing previous checks and repairs this may indicate the radar has failed Verify no visible physical damage to radar Check power ground and load test at the radar harness connector If fault persists after completing previous checks and repairs this may indicate the radar has failed Verify no visible physical damage to radar Check power ground and load test at the radar harness connector If fault persists after completing previous checks and repairs this may indicate the radar has failed Verify no visible physical damage to radar Check power ground and load test at the radar harness connector If fault persists after completing previous checks and repairs this may indicate the radar has failed Verify no visible physical damage to radar Check power ground and load test at the radar harness connector If fault persists after completing previous checks and repairs this may indicate the radar has failed Verify no visible physical damage to radar Check power ground and load test at the radar harness connector If fault persists after completing previous checks and repairs this may indicate the radar has failed Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 27 2 Diagnostics Troubleshooting and Testing Display a a Jo Sys
14. being tracked The safe following distance is maintained by controlling engine throttle engine retarder and the foundation brakes as necessary This automatic brake application is intended only to provide early braking until the driver is recognizing and reacting to the situation the driver must also apply the brakes in response to the Collision Warning lf the cruise control is not set the CWS provides the driver with audible and visual alerts to notify the driver of a potentially dangerous driving situation The CWS does not apply braking engine throttle or retarder control lf the driver is following too close behind another vehicle at a steady driving speed the following distance alert emits an audible tone and the in cab dash display screen turns yellow This alert ends when the driver s vehicle speed drops below the lead vehicle speed and the following distance is increased The alert also activates if the driver is using the accelerator pedal to override the cruise control and approaches too close to a vehicle The CWS is always active when at a road speed of approximately 15 mph 24 kph or faster No action is needed to turn CWS on and it cannot be arbitrarily turned off Collision Mitigation System CMS is integral to the OnGuard Collision Safety System The system will provide driver alerts with both visual and audible alarms through an in cab dash display when the vehicle s following distance could result in a rear end col
15. between 10 and 16 VDC e f the voltage is too high troubleshoot the voltage regulator and alternator system e Determine if a jump start or battery charging has occurred that could cause a vehicle overvoltage condition 917648 12 Amber OnGuard shutdown by OSEK e Cycle ignition power off for 2 to 3 minutes system Disabled e Verify fault does not return 517652 7 Amber OnGuard Motor azimuth Blockage detected Verify no visible physical damage to radar system Disabled e Check power ground and load test at the radar harness connector e f fault persists after completing previous checks and repairs this may indicate the radar has failed Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Display FMI Color 517653 7 Amber OnGuard system Disabled 517654 7 Amber OnGuard system Disabled 517655 7 Amber OnGuard system Disabled 517656 7 Amber OnGuard system Disabled 517657 7 Amber OnGuard system Disabled 517658 7 Amber OnGuard system Disabled 2 Diagnostics Troubleshooting and Testing Motor azimuth Blockage detected Motor azimuth crosscheck between light barrier and bemf speed Motor Azimuth drum runs in a wrong direction Motor Azimuth light barrier speed is out of range for more than 5 minutes Motor Azimuth bemf speed is out of range for more than 5 minutes Motor elevation plate is blocked or not available System Reaction Cause Description Action Repair
16. per the Display Replacement procedure in Section 3 Component Message Fault Troubleshooting Refer to the Diagnostic Trouble Code Table for further information The following sections and sub sections are the troubleshooting sections and sub sections referenced in the last column of the Diagnostic Trouble Code Table Message Timeout Occasionally the OnGuard Collision Mitigation System will generate Message Timeout DTCs due to data not being received from the ECUs connected on the SAE J1939 network This can occur if the cruise control engine transmission ABS engine retarder or driveline retarder ECUs have been re flashed with new software that is incorrect was not downloaded correctly or has the incorrect parameter set This information may reside in the vehicle OEM ECU database It is also possible that various ECUs are not operating correctly on the SAE J1939 network or DTCs have occurred during diagnostic procedures Perform the following procedure if a Message Timeout DIC is present NOTE Certain diagnostic software programs other than TOOLBOX Software can generate Timeout DTCs Verify code is Active on the display without any diagnostic software connected to the vehicle 1 Determine if the software or parameter set from the appropriate ECU has recently been modified Install the correct software and parameter set if required 2 Verify that the SAE J1939 network is functioning correctly Use the Radar Harness Ele
17. selection in Utilities If the protocol was changed you will need to cycle the key Displaying Radar Information To retrieve radar sensor information select Diagnostic Information from the home screen This will then display the radar sensor part number and radar software version as well as other important information Figure 2 6 z Men Denain aad T yom eiF Lapin OnGuard Collision Mitigation System Hada Ph odo on ikama Stabe of Compoennb Pet hymiar Darariire Frim Taai Hame Eryr Acland Sftearn Yeo sen Mame Enkarni Frid APAR Wer neces Miri B ee T rper habe of Pnie Eg 4012507a Figure 2 6 2 Diagnostics Troubleshooting and Testing Retrieving DTCs 4 A fault report can also be generated by selecting the Generate Fault Report button while in the Diagnostic Trouble Codes screen A Save As screen will then come up asking you to name the file and select where it will be saved Figure 2 9 The 2 From the pull down menu select Diagnostic Trouble Codes Fault Report screen provides additional information that is to bring up the DTC information screen Figure 2 7 not included in the Diagnostic Trouble Codes screen Figure 2 10 1 To display OnGuard radar sensor DTCs select the Display option from the menu Save in CO RadarDiagnostics v c EJ My Recent Documents Desktop Fadar PY der feces Pire fie op Part Hu
18. speed is not set The system will still emit audible and visual warnings when it detects a possible rear end collision CMS is active above 15 mph and will apply brakes if deemed necessary During the power up process the Radar not Aligned 0 then the Radar aligned 100 screens will display briefly Figure 1 4 and Figure 1 5 RADAR ALIGNMENT Radar Not Aligned start Alignment Process 0 4010385a Figure 1 4 RADAR ALIGNMENT Radar Aligned 100 4010388a Figure 1 5 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 3 1 Introduction After the alignment screens the NO CMS screen will be displayed and will remain on the screen while the vehicle is traveling less than 15 mph Figure 1 6 4011864a Figure 1 6 Once the vehicle is traveling faster than 15 mph the following screens will be displayed Figure 1 7 Cruise Control not set Cruise Control not set No lead vehicle detected Lead vehicle detected 4011856a Figure 1 7 Following Distance Alert Adaptive Cruise Control Not Set The Following Distance Alert will provide an audible alert and the in cab dash display screen will turn yellow if the vehicle is following another vehicle too closely at a 3 0 seconds hwy 1 5 seconds city following interval tailgating This alert will end when the following distance is increased to a safe level or if the speed drops below the lead vehicle speed Figure 1 8 4 Meritor WABCO Mai
19. system Disabled radar software update J1939 Cruise Control Vehicle speed 1 CCVS1 message from second source usually the body controller or chassis controller not received or intermittent J1939 Cruise Control Vehicle speed 1 CCVS1 message from third source usually the body controller or chassis controller not received or intermittent J1939 Retarder Configuration RC message from the engine retarder not received or intermittent Incorrect J1939 Reference Retarder Torque data received in RC message from engine retarder TOOLBOX Software PC Diagnostics with SPN 197120 FMI 31 on the display Verify the correct OnGuard radar part number is installed on the vehicle Verify the body chassis ECU is functional and has correct software and parameters Cycle the ignition to clear DTCs after servicing body chassis ECU If SPN 516097 FMI 9 is also active in conjunction with this code there may be an issue with the Central Gateway Module review with the OEM Verify the correct OnGuard radar part number is installed on the vehicle Verify the body chassis ECU is functional and has correct software and parameters Cycle the ignition to clear DTCs after servicing body chassis ECU If SPN 516096 FMI 9 is also active in conjunction with this code there may be an issue with the Central Gateway Module review with the OEM Verify the correct OnGuard radar part number is installed on the vehicle Cy
20. vehicle ahead why OnGuard sometimes gives audible warnings even though there is nothing in the lane why What happens if the driver receives an OnGuard System Error Notification Can the vehicle still be driven Overview OnGuard OnGuard is a collision safety system that incorporates adaptive cruise control with active braking and CMS It is currently available for pneumatically braked vehicles Adaptive Cruise Control If Equipped Adaptive Cruise Control ACC adjusts the speed of your vehicle while in cruise control and attempts to maintain a pre set following interval defaulted at 3 6 seconds when there is a vehicle ahead driving at a lower speed than your vehicle ACC works in conjunction with conventional cruise control to maintain the set cruise soeed when the lane ahead Is clear and will automatically adjust the vehicle s speed to maintain the set following interval when a vehicle ahead is detected OnGuard achieves the set following interval by controlling engine torque engine and foundation brakes without driver intervention When the lane ahead again becomes clear the set cruise speed resumes automatically Collision Mitigation System OnGuard s Collision Mitigation System CMS assists the driver in recognizing and responding to potentially dangerous driving scenarios that could lead to a rear end collision The system responds by sending warnings automatically reducing engine torque and apply
21. 1 message from engine Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 System Reaction Cause Description Action Repair Instructions Verify operation of the Parking Brake Switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Verify the correct radar part number is installed on the vehicle Verify the engine ECM is functional and has correct software and parameters Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Verify the Accelerator Pedal is operating correctly and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is used on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify engine ECM is functional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify engine ECM is functional and has correct software and parameters Display FMI Color Amber OnGuard system Disabled n o CO pans ek CO OnGuard system Disabled Amber O1 12 OnGuard system Disabled Amber O1 13 OnGuard system Disable
22. 14 mm flange head bolts bolt class ISO 8 8 or M6 bolt with 12 mm washer that was removed or recommended hardware per OEM requirements Dry tighten the bolts to 91 in Ib 10 3 Nem Figure 3 1 11 Perform the Radar Sensor Service Alignment procedure in section 2 Display Replacement 1 Follow the vehicle manufacturer s recommendation for removal of the instrument panel 2 Make sure the ignition is in the OFF position Disconnect the wiring connector from the OnGuard Display 3 Remove the OnGuard Display Save the 6 32 nuts for installation of the new display 4 Reinstall the new OnGuard Display 5 Connect the wiring connector to the new OnGuard Display OnGuard System Information What is OnGuard OnGuard is a radar based active safety system that offers Forward Collision Warning Collision Mitigation and Adaptive Cruise Control ACC OnGuard detects objects ahead and measures the vehicle s position in relation to others on the road to assist the driver in recognizing and responding to potentially dangerous driving scenarios that could lead to a rear end collision The system responds by sending audible visual and haptic warnings automatically reducing engine torque and applying the foundation brakes when necessary to help avoid or mitigate an impending collision OnGuard js always monitoring the road and provides warnings and active braking even when cruise control is not set The system als
23. DTC If it is a single DTC update the Engine and Vehicle Gateway software 2 Diagnostics Troubleshooting and Testing Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 35 3 Component Replacement Hazard Alert Messages Read and observe all Warning and Caution hazard alert messages in this publication They provide information that can help prevent serious personal injury damage to components or both 4 amp WARNING To prevent serious eye injury always wear safe eye protection when you perform vehicle maintenance or service Release all air from the air systems before you remove any components Pressurized air can cause serious personal injury Refer to the vehicle manufacturer s service manual for instructions Radar Sensor 44 WARNING Park the vehicle on a level surface Block the wheels to prevent the vehicle from moving Support the vehicle with safety stands Do not work under a vehicle supported only by jacks Jacks can slip and fall over Serious personal injury and damage to components can result Radar Sensor Replacement 1 Turn the ignition switch to the OFF position 2 Place blocks under the rear tires to prevent the vehicle from moving Apply the parking brake 3 Remove the three fascia mounting bolts and remove the fascia from the radar sensor Figure 3 1 RADAR FASCIA 4007305a Figure 3 1 4 Pull back the rubber boot from the radar connector Disconnect the radar sensor connec
24. MERITOR WABCO Maintenance Manual MM 1306 OnGuard Collision Mitigation System Revised 11 15 service Notes About This Manual This service manual applies to all vehicles equipped with the OnGuard Collision Mitigation System Before You Begin 1 Read and understand all instructions and procedures before you begin to service components 2 Read and observe all Warning and Caution hazard alert messages in this publication They provide information that can help prevent serious personal injury damage to components or both 3 Follow your company s maintenance and service installation and diagnostics guidelines 4 Use special tools when required to help avoid serious personal injury and damage to components Hazard Alert Messages and Torque symbols 4 amp WARNING A Warning alerts you to an instruction or procedure that you must follow exactly to avoid serious personal injury and damage to components 4 amp CAUTION A Caution alerts you to an instruction or procedure that you must follow exactly to avoid damage to components This symbol alerts you to tighten fasteners to a specified torque value How to Obtain Additional Maintenance service and Product Information Visit Literature on Demand at meritor com to access and order additional information Contact the OnTrac Customer Service Center at 866 668 7221 United States and Canada 001 800 889 1834 Mexico or email OnTrac meritor com M
25. OTE It is important to document any DTC that is displayed because stored DTCs are not displayed and are only retrievable with TOOLBOX Software NOTE When active DTCs are present the OnGuard system may be partially or fully disabled depending on whether the DTC s is associated with the ACC functions or the CMS functions 6 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Multiple DTCs may be active simultaneously If a DTC is shown on the display use the UP and DOWN keys on the OnGuard display to scroll through each code Figure 2 2 Record each DIC for future reference DISPLAY UP DOWN KEYS 4010554b Figure 2 2 OnGuard DTCs may become active during service procedures on other electrical system components e g engine transmission ABS etc If there are other vehicle systems with faults they should be repaired first After completion of service on the other vehicle system components cycle the ignition OFF for one minute and then turn the ignition back ON Start the engine and run it at idle speed for one minute This frequently clears the OnGuard DTCs Troubleshooting Guide When ignition power is switched on the screen shown in Figure 2 3 will be displayed for several seconds OnGuard Collision Mitigation System MERITOR WABCO 2012 XXXXXXXXXX 4010373b Figure 2 3 lf the OnGuard display does not light up when the ignition is on make sure that the display brightnes
26. abled 770 19 Amber OnGuard system Disabled 904 Amber OnGuard system Disabled 904 19 Amber OnGuard system Disabled 905 19 Amber OnGuard system Disabled Incorrect J1939 Clutch Switch data received in CCVS1 message from engine ECM body cab or chassis controller Incorrect J1939 Cruise Control Set Switch data received in CCVS1 message from engine ECM body cab or chassis controller Incorrect J1939 Cruise Control Resume Switch data received in CCVS1 message from engine ECM body cab or chassis controller Bootloader error usually caused when there is an issue during a radar software update J1939 Wheel Speed Information EBC2 message from the ABS not received or intermittent CAN Out of Range for signal EBC2_FRNT_AXLE_SPD See ABS EGU CAN Out of Range for signal EBC2_RELSPD_FRNTAXLE_LW Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 System Reaction Cause Description Action Repair Instructions Verify operation of the Clutch Switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Verify operation of the Cruise Control Set switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Verify operation of t
27. ace as necessary e f the resistance between Pins 7 and 6 is equal to 120 ohms one of the SAE J1939 circuits is open or one of the termination resistors is missing Repair and replace as necessary e f the resistance between Pins 7 and 6 is less than 60 ohms more than two termination resistors are installed the SAE J1939 harness is shorted or one or more ECUs on the SAE J1939 network are damaged Remove each ECU connected to the bus one by one until the bus resistance returns to 60 ohms Repair and replace as necessary 2 Diagnostics Troubleshooting and Testing NOTE Make sure to check the firewall pass thru connections for loose or broken connections 9 Key On Engine Off Check voltage to ground on Pins 7 and 6 e The voltage readings on pins 7 and 6 will fluctuate but should always be within a certain range and should never be the same Pin 7 should be 2 5 volts to 5 volts Pin 6 should be 2 49 volts or less The total voltage between pins 7 and 6 should be approximately 5 volts e f the voltages are out of range review J1939 diagnostics with the vehicle OEM 6 If no problems are found in the harness 12V is present at the display connector the SAE J1939 network resistance is 60 ohms and the connector is correctly installed replace the display per the display replacement procedure in Section 3 7 Pins 1 2 3 and 8 are not used system Voltage DTC Occasionally the vehicle battery voltage regulator or a
28. acement lf the OnGuard Radar Service Alignment will not initiate perform the following procedure 1 Turn off the ignition for 90 seconds 2 Start the vehicle and drive above 10 mph 3 Pull to the side of the road and come to a complete stop d and leave the key on 4 With the TOOLBOX Software connected initiate the service alignment to complete the alignment process Electrical System and Harnesses Troubleshooting Refer to the Diagnostic Trouble Code Table for further information The following sections and sub sections are the troubleshooting sections and sub sections referenced in the last column of Diagnostic Trouble Code Table The following procedures require a multi meter Note that during pin probing damage to connector pins can result if the probe exceeds the recommended maximum diameter For the radar sensor the maximum diameter is 0 015 inch 1 64 inch For the OnGuard Display connector the maximum diameter is 0 015 inch 1 64 inch Harness Routing and Associated Wire Fatigue or Abrasion Wire fatigue will occur at any harness location where sufficient harness motion allows bending of the wiring When this occurs individual harness wires become weakened and can break The harness can have intermittent or permanent open circuit failures causing the OnGuard Collision Mitigation System to malfunction Harness abrasion will occur at any harness location where sufficient harness motion allows rubbi
29. and Diagnostic Trouble Codes Troubleshooting Guide TOOLBOX Software OnGuard Radar Diagnostic Trouble Code Table Radar Inspection and Preventive Maintenance Radar System Troubleshooting Electrical System and Harnesses Troubleshooting Component Message Fault Troubleshooting Cruise Control System Troubleshooting section 3 Component Replacement Radar Sensor Display Replacement Section 4 Frequently Asked Questions OnGuard System Information What is OnGuard How does OnGuard work What is ACC How can enable disable it What is Haptic Warning What is Active Braking What is the difference between a stopped object and a Stationary object How does OnGuard respond differently What objects does OnGuard warn on or actively brake on Is OnGuard active while at very low speeds Will the system react to stop and go traffic Do the brake lights come on when OnGuard activates the brakes What are Meritor WABCO s Roll Stability Control RSC and Electronic Stability Control ESC systems Why is either one required for OnGuard to be installed How much braking power does OnGuard apply Will the system override the ABS and lock up the brakes pg 38 Contents How does the system adjust for severe and slippery weather conditions that could cause sliding or jackknifing sometimes when cruise control is set the vehicle slows down on its own while going around a curve even though there is no
30. ar DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Use Meritor WABCO TOOLBOX Software PC Diagnostics to test the ABS Brake Pedal Pressure Sensor Verify the correct radar part number is installed on the vehicle Verify the correct ABS ECU part number is used on the vehicle Cycle the ignition to clear DTCs after ABS servicing Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 15 2 Diagnostics Troubleshooting and Testing Display FMI Color 523 Amber OnGuard System Disabled 523 19 Amber OnGuard System Disabled 527 Amber OnGuard System Disabled 527 19 Amber OnGuard System Disabled 544 19 Amber OnGuard System Disabled 559 Amber OnGuard System Disabled J1939 Electronic Transmission Controller 2 ETC2 message not received or intermittent Incorrect J1939 Transmission Current Gear data r
31. ard system will be disabled 4010335a Figure 1 2 Display The OnGuard display provides the interface for the driver Figure 1 3 Audible and visual warnings as well as verification of correct system operation and faults are communicated to the driver The driver is able to monitor the status of lead vehicles that the OnGuard system is tracking The functions of the OnGuard display may be integrated into a vehicle s instrument panel If the vehicle has an integrated display please refer to your vehicle owner s manual for correct operation 4010594a Figure 1 3 2 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 SAE J1939 Network The SAE J1939 Serial Control and Communications Heavy Duty Vehicle Network allows various electronic controllers on the vehicle to interact efficiently and in coordination with each other The interactions between controllers include sharing sensor data calculated information subsystem operating state and configuration This communication allows subsystems to influence each other s operation How OnGuard Works OnGuard is a Collision Warning System CWS and Collision Mitigation System CMS with Adaptive Cruise Control ACC if so equipped ACC is a radar based tracking system that works in conjunction with standard Cruise Control to maintain the set cruise speed when no vehicle is being tracked and maintains a safe following distance when a lead vehicle is
32. bumper so there is a minimum of 1 4 inch 6 35 mm clearance between it and the fascia at all points Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Run the software update again Cycle ignition power off for 3 minutes and power on lf fault persists after completing previous checks and repairs this may indicate the radar has failed 2 Visually inspect the radar connector and housing for any damage Inspect the edge of the fascia for any signs of wear or prior contact with the bumper Also inspect the routing of the radar sensor harness to ensure it is not pinched in the bumper or damaged at any point The rubber boot on the radar harness connector must fully cover the connector 3 Grab onto the radar sensor and gently wiggle it back and forth You should not feel any slack or movement in the installation The radar sensor should be securely mounted at all three positions 4 lf the radar passes all of these inspections reinstall the fascia and verify correct vertical and horizontal alignment according to the Radar Sensor Service Alignment procedure in this section Radar System Troubleshooting Refer to the Diagnostic Trouble Code Table for further information The following sections and sub sections are the troubleshooting sections and sub sections referenced in the last column of the Diagnostic Trouble Code Table Radar Sensor Connector Corrosion Radar sensor connector corrosion has been found on vehicles whe
33. calculate the braking required and will apply up to 50 of a vehicle s braking power to help in avoiding or mitigating a collision The system utilizes the vehicle s ABS and stability system to prevent wheel lock up and maintain control How does the system adjust for severe and slippery weather conditions that could cause sliding or jackknifing OnGuard works with the Anti Lock Braking System ABS and stability control systems on the vehicle and therefore the braking initiated by the system is not likely to cause the vehicle to slide or jack knife Sometimes when cruise control is set the vehicle slows down on its own while going around a curve even though there is no vehicle ahead why Vehicles equipped with OnGuard are also equipped with a sophisticated stability control system either SmartTrac Electronic stability Control System ESC or SmartTrac Roll Stability Control system RSC These systems monitor the vehicle s speed and weight to determine the threshold of a potential loss of control When the stability control system determines the vehicle is going around a curve at a speed that can cause a potential loss of control it will reduce engine torque apply engine brakes and if necessary apply the service brakes of the vehicle This type of intervention can happen whether cruise control is set or not OnGuard sometimes gives audible warnings even though there is nothing in the lane why OnGuard relies
34. cle the ignition to clear DTCs after engine servicing Verify engine retarder ECU is functional and has correct parameters and software downloaded from database Verify the correct engine retarder ECU part number is installed on this vehicle Cycle the ignition to clear DTCs after retarder servicing CAN 1 Bus Off e Check CAN wiring at other ECUs 22 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 2 Diagnostics Troubleshooting and Testing Display i ie ee System Reaction Cause Description Action Repair Instructions 916215 Amber OnGuard J1939 network messages not e Verify J1939 network backbone stub System Disabled received or intermittent connections to each ECU and terminating resistors are correct Verify engine ABS and OnGuard display are operational and communicating on J1939 network 916219 Amber OnGuard Excessive automatic braking is Stored Fault Driver must reduce speed and system Disabled used to maintain safe following use a lower gear while driving down hill interval while driving down hill 916497 12 Amber OnGuard Extended plausibility check for Verify the correct OnGuard radar part System Disabled signal number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM has the Adaptive Cruise Control parameter enabled 916499 12 Amber OnGuard Malfunction in the Anti Lock Use Meritor WABCO TOOLBOX PC System Disabled Braking S
35. ctrical Checks procedure to repair any SAE J1939 network issues 3 After any ECU servicing has been completed cycle the ignition OFF for one minute and then back ON for one minute with the engine idling to clear the OnGuard DTC Verify that the DTC has been cleared Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Message Data Error Occasionally the OnGuard Collision Mitigation System will generate Message Data Error DICs from ECUs connected on the SAE J1939 network This can occur if an ECU has been re flashed with new software that is incorrect was not downloaded correctly or has the wrong parameter set This information resides in the OEM ECU database It is also possible that the problem ECU was replaced with the wrong ECU Perform the following procedure if a Message Data Error DIC is present 1 Determine if the appropriate ECU has been recently replaced Verify that the correct ECU part number has been installed Install the correct ECU if required 2 Determine if the ECU software or parameter set have recently been modified Install the correct software and parameter set if required 3 Use the OnGuard display to determine if the various functions i e set resume accel coast etc are functioning correctly Consult the OnGuard display operating instructions for more information 4 After ECU servicing has been completed cycle the ignition OFF for one minute and then back ON for one minute with t
36. d Amber Amber OnGuard system Disabled 520 OnGuard system Disabled Amber O1 NO CO Ol i oO y i SE S ek CO CO OnGuard system Disabled Amber Ol DO CO OnGuard system Disabled Amber 2 Diagnostics Troubleshooting and Testing received in EEC1 message from engine Incorrect J1939 Transmission Output Shaft Speed data received in ETC1 message from transmission Incorrect J1939 Driver s Demand Engine Percent Torque data received in EEC1 message from engine J1939 Electronic Engine Controller 1 EEC1 message not received or intermittent Incorrect J1939 Actual Engine Percent Torque data received in EEC1 message from engine J1939 Electronic Retarder Controller 1 ERC1 message not received or intermittent Incorrect J1939 Actual Retarder Percentage Torque data received in ERC1 message from engine retarder Incorrect J1939 Brake Pedal Position data received in EBC1 message from ABS System Reaction Cause Description Action Repair Instructions Incorrect J1939 Engine Speed data Cycle the ignition to clear DTCs after engine servicing Verify engine ECM is functional and has correct software and parameters Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify the transmission ECU is functional and has correct software and parameters Cycle the ignition to cle
37. dar sensor is not aligned Cruise Control States and Adaptive Cruise Control Mode are Mismatched Wabco Production Data could not be read from EEPROM during Startup OnGuard Radar Sensor blocked by ice mud or debris while driving Reflected signal from other vehicles is too weak OnGuard Radar Sensor blocked No stationary objects observed within 2 minutes while driving e Verify the correct ABS ECU part number is used on the vehicle Use Meritor WABCO TOOLBOX Software PC Diagnostics to test the Anti Lock Braking System Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after ABS servicing Perform Service Alignment Cycle ignition and determine if issue is resolved Driver must cycle Brake Switch and Clutch Switch prior to activating Cruise Control Cycle the ignition to clear DTCs Park the vehicle in a safe location set the Parking Brake and turn ignition OFF Inspect and clean the radar fascia The DTC will be cleared when ignition is switched ON Drive the vehicle in traffic about 5 minutes at speeds above 20 mph to confirm the blockage is cleared Park the vehicle in a safe location set the Parking Brake and turn ignition OFF Inspect and clean the radar fascia Re start the engine DTC should clear as the vehicle begins driving above 15 mph lf the Blocked Radar DTC causes a secondary engine DTC an additional ignition OFF cycle
38. display will turn red showing a stationary object symbol OnGuard will not apply the brakes or reduce the vehicle s speed when it detects a Stationary object CMS will not be active when the vehicle s speed is below 15 mph Figure 1 11 Object Stationary Collision Warning Collision Warning 4011860a Figure 1 11 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 6 2 Diagnostics Troubleshooting and Testing General Information Radar Sensor and Display Software Levels Many diagnostic and troubleshooting procedures will require knowledge of the software version of the OnGuard radar sensor and display NOTE The radar sensor software version can be determined using TOOLBOX Software The display software revision level can be determined using the following display operating procedure 1 Turn the ignition key ON and wait for the display to power up 2 Press the Mode key on the display several times until the screen labeled Software Rev shown in Figure 2 1 appears SOFTWARE REV SOF0862XX 4010389a Figure 2 1 NOTE Take note of the software version of each component for reference during procedures required in this manual and for component replacement Error Screens and Diagnostic Trouble Codes If the system is not operating correctly an error screen or a screen containing Diagnostic Trouble Codes DTCs may be shown on the display Only currently active DTCs are displayed N
39. eceived in ETC2 message from transmission J1939 Cruise Control Vehicle speed 1 CCVS1 message from the primary source usually the engine not received or intermittent Incorrect J1939 Cruise Control States data received in CCVS1 message usually from engine also possible from body cab or chassis controller Incorrect J1939 Engine Reference Torque data in EC1 message received from engine J1939 Electronic Engine Controller 2 EEC2 message not received or intermittent Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 System Reaction Cause Description Action Repair Instructions e Verify the correct OnGuard radar part number is installed on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify transmission ECU is functional and has correct software and parameters Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify transmission ECU is functional and has correct software and 527 parameters Verify the correct OnGuard radar part number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify engine ECU is functional and has correct software and parameters Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM or body cab or chassis controller is func
40. eritor WABCO Maintenance Manual MM 1306 Revised 11 15 lf Tools and Supplies are Specified in This Manual TOOLBOX Software 11 0 or higher is available at meritorwabco com Information contained in this publication was in effect at the time the publication was approved for printing and is subject to change without notice or liability Meritor WABCO reserves the right to revise the information presented or to discontinue the production of parts described at any time OnGuard Warnings Cautions and Operating Guidelines Driver Related Information 44 WARNING The OnGuard Collision Mitigation System CMS is a driver aid only It is designed to assist the vehicle operator in maintaining a safe following distance and if needed provide limited initial braking to reduce the severity of a possible collision It is not an auto pilot system for operating the vehicle The OnGuard CMS is no substitute for the most important factor in vehicle safety which is a safe conscientious driver Use of OnGuard CMS cannot compensate for a driver that is distracted inattentive or impaired by fatigue drugs or alcohol As always it is the driver s responsibility to e Use safe driving techniques e Exercise proper judgment for the traffic road and weather conditions e Maintain a safe distance between vehicles e Apply the brakes when needed to maintain control of the vehicle Whether OnGuard CMS is in use or not the drive
41. he engine idling to clear the OnGuard DTC Verify that the DTC has been cleared Cruise Control System Troubleshooting Refer to the Diagnostic Trouble Code Table for further information The following sections and sub sections are the troubleshooting sections and sub sections referenced in the last column of the Diagnostic Trouble Code Table The Engine Ignores ACC Control DIC may be generated due to other vehicle system DTCs or issues Check for multiple OnGuard DTCs using the TOOLBOX Software If multiple DTCs are present the DIC is most likely a secondary DTC Take corrective action for the primary DIC first and cycle the ignition Document all DTCs present If the other DTCs are corrected and the Engine Ignores ACC DIC is still present then the Engine Ignores ACC Control DTC becomes the primary DTC There is a communication issue with the other vehicle systems Verify the Engine and Gateway ECU software is up to date and cycle the ignition Programming DTCs 1 Verify with the OEM or engine manufacturer that the correct engine parameters are programmed to accept ISC1 messages from the Adaptive Cruise Control ACC Reprogram the engine parameters if not correct Refer to the vehicle manufacturer s service manual for further instruction Check for multiple DTCs using the OnGuard Display If there are multiple DTCs this is a secondary DTC caused by other DTCs Correct the other DTCs and cycle ignition to clear this
42. he Cruise Control Resume switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Run the software update again Is usually seen in TOOLBOX Software with SPN 197120 FMI 31 on the display Verify the ABS ECU is connected to the J1939 network and is functional Verify correct ABS part number is used Cycle ignition to clear DTCs after ABS servicing Verify the ABS ECU is connected to the J1939 network and is functional Verify correct radar part number is installed on the vehicle Verify wheel speed sensor signal per ABS ECU diagnostics Cycle ignition to clear DICs after ABS servicing Check ABS ECU for proper function and active faults Verify correct ABS ECU is installed 2 Diagnostics Troubleshooting and Testing Display FMI Color System Reaction Cause Description Action Repair Instructions J OnGuard CAN Out of Range for signal Check ABS ECU for proper function and active System Disabled EBC2_RELSPD_FRNTAXLE_RW faults Verify correct ABS ECU is installed OnGuard CAN Out of Range for signal Check ABS ECU for proper function and active system Disabled EBC2_RELSPD_REARAXLE_LW faults Verify correct ABS ECU is installed OnGuard CAN Out of Range for signal Check ABS ECU for proper function and active system Disabled EBC2_RELSPD_REARAXLE_RW faults
43. hicle has one or pressing the cruise control OFF button 4 Frequently Asked Questions What is Haptic Warning The OnGuard system utilizes three alerting methods to warn drivers of a collision danger audible visual and haptic The audible warning will beep while the visual warning changes the color and screen image of the OnGuard display The haptic warning is a quick pulse of braking felt when a collision danger is present depending on the speed and distance of vehicles ahead These warnings will occur when an unforeseen event occurs such as another vehicle entering the lane and travelling slower than you are or when the gap between the vehicles becomes too small For a detailed explanation of OnGuard s alerts please refer to the driver tios document available on Meritor WABCO s website What is Active Braking Active braking is a system initiated brake application that can be triggered by OnGuard without the driver s input If OnGuard determines that a rear end collision is imminent and a safe evasive maneuver is no longer possible it will automatically apply foundation brakes to help mitigate or prevent a collision Active braking can also be triggered by ACC to maintain a safe following distance or by the stability control systems to maintain control of they vehicle during hazardous weather conditions or to reduce rollover risks What is the difference between a stopped object and a stationary objec
44. ident Serious personal injury or death and or severe property damage can result 44 WARNING While the OnGuard CMS is in System Radar Alignment mode the system will not track vehicles or operate Make sure that the Service Alignment procedure is completed before releasing the vehicle from service Failure to do so can result in serious personal injury or death and or severe property damage ii Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 4 amp WARNING lf a potential collision is developing and the driver does not take action to decelerate the vehicle the OnGuard CMS sounds an alert automatically de throttles the engine and applies the foundation brakes to provide up to 0 35g of braking power The driver must still apply the brakes to provide additional braking force to help avoid an accident Failure to apply the brakes when necessary can result in serious personal injury or death and or severe property damage 4 amp WARNING Do not allow the installation of bumpers cattle guards or other such items in front of the radar area If the radar is blocked the OnGuard CMS will have limited or no functionality which can lead to an accident Serious personal injury or death and or severe property damage can result 4 amp WARNING OnGuard CMS automatically becomes active once the vehicle reaches a speed of 15 mph 24 kph It does not provide warning and braking functionality below 15 mph 24 kph It is
45. ing foundation brakes OnGuard s CMS will provide both visual and audible alerts through an in cab dash display when the vehicle s following interval could result in a rear end collision If a potential rear end collision is developing and the driver does not take action to decelerate the vehicle OnGuard s active braking feature issues a haptic warning short brake pulse and automatically de throttles the engine lf a potential rear end collision still exists and the driver has not taken the appropriate action OnGuard s CMS will apply the foundation brakes to provide up to 50 of available braking power When OnGuard activates the vehicle s brakes the brake lights will come on The active braking application is intended to assist the driver to avoid or reduce the severity of a collision The driver must take the appropriate corrective action in response to the collision warning OnGuard warnings will not be issued below a vehicle speed of 15 mph 1 Introduction Forward Collision Warning The Forward Collision Warning FCW will generate an audible and visible alert when the vehicle s following distance may result in a collision FCW will also generate an audible and visible alert when a threatening stationary object is detected FCW provides only a warning and will not control vehicle speed unless ACC is engaged or a collision mitigation event is detected FCW cannot be turned off and is always active a
46. ional components that are connected to the J1939 network that may cause a message Issue Intermittent power or J1939 network connection to OnGuard display or instrument cluster Verify harness is correct Verify correct software version in OnGuard display or instrument cluster Intermittent power or J1939 network connection to OnGuard display or instrument cluster Verify harness is correct Verify correct software version in OnGuard display or instrument cluster Intermittent power or J1939 network connection to OnGuard display or instrument cluster Verify harness is correct Verify correct software version in OnGuard display or instrument cluster Intermittent power or J1939 network connection to OnGuard display or instrument cluster Verify harness is correct Verify correct software version in OnGuard display or instrument cluster Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 21 2 Diagnostics Troubleshooting and Testing Display E System Reaction Cause Description Action Repair Instructions Bootloader error usually caused when there is an issue during a e Run the software update again e ls usually seen in MeritorWABCO 197120 131 Amber OnGuard system Disabled 516096 516097 516108 ae 516108 OnGuard system Disabled OnGuard system Disabled OnGuard system Disabled OnGuard system Disabled OnGuard
47. is less than 15 mph Accordingly OnGuard e Will not react and alert the driver to objects crossing in front of the vehicle or oncoming traffic Cruise Control set Following distance alert e Should not be relied on to track lead vehicles when traveling ACC at maximum braking and requesting through a severe curve in the road Because of this ACC is not additional driver braking E recommended for use on winding curving roads e Will alert but not actively brake on stationary objects Figure 1 10 e Should not be relied upon to track smaller objects e g Collision Warning and Mitigation motorcycles mopeds bicycles pedestrians etc When an unforeseen event occurs such as another vehicle enters e Should not be relied on to alert drivers to vehicles in an adjacent the vehicle s lane traveling slower than the vehicle or the gap lane between the vehicles becomes too close OnGuard will provide an audible alert and the display will turn red with a collision warning symbol If the system determines that a rear end collision is imminent it will automatically apply the brakes to reduce the vehicle s speed The driver may also feel a haptic warning short brake pulse to warn of collision danger The driver must also take the appropriate corrective action to avoid dangerous driving situations If OnGuard detects a stationary object in the vehicle s lane such as a disabled car it will provide an audible alert and the
48. le is travelling at speeds below 15 mph to prevent slow speed activation in heavy traffic truck stops and rest areas Do the brake lights come on when OnGuard activates the brakes Yes the vehicle brake lights will come on when OnGuard applies the brakes What are Meritor WABCO s Roll Stability Control RSC and Electronic Stability Control ESC systems Why is either one required for OnGuard to be installed RSC and ESC are active vehicle safety systems that assist drivers in maintaining control of the vehicle RSC monitors conditions that can lead to a rollover and it automatically intervenes if a high rollover risk is detected by reducing engine torque engaging the engine retarder and if necessary applying drive axle and trailer brakes ESC combines RSC with the added capability of directional or rotational control to reduce the potential of jack knifing and drift out conditions OnGuard utilizes the stability control systems on the vehicle to ensure the vehicle s stability during active braking in all weather conditions Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 How much braking power does OnGuard apply Will the system override the ABS and lock up the brakes OnGuard applies the brakes during ACC to maintain a safe following distance and during collision mitigation when a rear end collision is deemed unavoidable Depending on the speed of the vehicle and the vehicle ahead OnGuard will
49. lision If a potential rear end collision is developing and the driver does not take action to decelerate the vehicle OnGuard s Active Braking automatically de throttles the engine followed by the application of the foundation brakes to provide up to 0 35g of braking power The CMS will activate on moving objects and objects that were seen moving by the radar and have stopped lf hard braking is required to prevent a collision a haptic warning may occur This situation can occur if another vehicle crosses into the path of the driver s vehicle at a distance near the front of the vehicle The foundation brakes are applied very briefly at 0 25g to make the driver aware of the impending danger With this notification the driver has the opportunity to attempt a steering maneuver and further driver initiated brake applications to avoid the collision If the situation requires further system intervention automatic braking for collision prevention or mitigation can provide up to 0 35g of braking Stationary Object Warning The OnGuard system can also identify stationary objects objects that the radar never saw moving that are in the path of the vehicle and will provide audible and visual warning to the driver The system does not provide engine torque control or braking during this situation 4 amp WARNING The OnGuard CMS should only be considered an aid to drivers in maintaining a safe following distance and is not intended to
50. lled on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify transmission ECU is functional and has correct software and parameters Verify the correct OnGuard radar part number is installed on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify transmission ECU is functional and has correct software and parameters Verify the correct ABS ECU part number is used on this vehicle Cycle the ignition to clear the DTCs after ABS servicing Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after transmission servicing Verify the transmission ECU is functional and has correct software and parameters Verify operation of the Cruise Control Enable switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Verify operation of the Brake Switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 17 2 Diagnostics Troubleshooting and Testing Display FMI Color 598 19 Amber OnGuard system Disabled 599 19 Amber OnGuard system Disabled 601 19 Amber OnGuard system Dis
51. lternator can cause the OnGuard Collision Mitigation System to generate high or low voltage DTCs Refer to the Key ON section of the Radar Harness Electrical Check in this section to determine if correct power is supplied to the system If a radar undervoltage or overvoltage DIC is present troubleshoot the vehicle alternator battery and voltage regulator as required SAE J1939 Network SAE J1939 network communication errors can occur if all components interacting with the OnGuard Collision Mitigation system are not correctly connected to the network are transmitting at a different rate than expected or the termination resistors are missing or not correctly positioned at the ends of the SAE J1939 network Perform the Radar Harness Electrical Check in this section if a radar SAE J1939 network DTC Is present Display Message Timeout Error Occasionally the OnGuard Collision Mitigation System will generate Display Message Timeout DTCs because the OnGuard Display has stopped sending messages to the radar sensor at a 250 ms rate This can be caused by an intermittent OnGuard Display power or intermittent SAE J1939 data link connection Perform the Display Harness Electrical Checks in this section if a Display Message Timeout DTC is present Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 33 2 Diagnostics Troubleshooting and Testing Display Message Data Error lf the Display Message DTC occurs replace the display
52. mba Devel ose Flemmriter Pequrer Betar 9 Erhai Raimi Ss 4012508a File name Faut Report z Save as type Text Files txt v Cancel Va 4008874a Figure 2 7 3 A description of the DIC the number of times the DTC occurred the suspect parameter number SPN and the failure Figure 2 9 mode identifier FMI are all displayed in the Diagnostic Trouble Codes window When you click on one of the DTCs in the window the Extended DTC Information will populate below Information includes vehicle speed odometer reading and the radar s internal temperature the first and last time this trouble code was reported The fields under Counters will show how many times this code was reported and how many ignition cycles since the last time this code was active Figure 2 8 After making the necessary repairs use the Clear DTCs to reset the radar ipai Trails Coti k E EE Be mt go Bani pi 4008875b Quebes of Ache OTe Humb of Stored DE Ca d ei r eee a 7 Figure 2 10 l DTCs can be cleared after generating a fault report Only stored DTCs will clear Figure 2 8 perd nperi Derun diim wa domain fates nal T irga ical Tampan Vege Dees pti mer Lee rer ee Engl Ketr Genevete OTC Ropes Diw DE Cirie 4012509a Figure 2 8 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 11 2 Diagnostics Troubleshooting and Testing Recording J1939 Data 3
53. ness for severe abrasion or 8 If no problems are found with the harness 12V is present at kinks that might crush or cut wires and check all the radar harness connector and the SAE J1939 bus connections for corrosion or connector damage resistance is 60 ohms replace the radar sensor per the Radar Over tightened tie wraps may cause this type of damage If sensor Replacement procedure in Section 3 any damage or corrosion is found repair and replace as 9 Pins 4 5 and 7 are not used necessary Clean connector corrosion using electrical contact cleaner Display Harness Electrical Checks 5 Repeat Step 4 across Pins 2 and 8 The display harness is connected to the OnGuard Display mounted in the dashboard The following display harness checks should be followed when various DTCs occur Refer to 6 Key Off Engine Off Check across Pins 3 and 6 SAE J1939 Troubleshooting Guide for further information for resistance of 60 ohms e f good go to step 6 Remove the dash to access the back of the OnGuard Display and e f the resistance is 120 ohms check the two termination harness connector Figure 2 23 resistors Each should measure 110 130 ohms across the resistor pins If each individual resistor does not measure 110 130 ohms replace the bad termination resistor e Check harness SAE J1939 circuits for open or shorts If the resistance between Pins 3 and 6 Is greater than 130 ohms both SAE J1939 circuits are open or both termination
54. ng of the harness against adjacent vehicle components When this occurs the outer harness jacket and the individual wire insulation can wear causing short circuits between each of the exposed wires or to the vehicle chassis causing the OnGuard Collision Mitigation System to malfunction The harness is especially susceptible to wear when the harness rubs against a sharp edge Both wire fatigue and harness abrasion can be prevented by correctly attaching the harness to the chassis at closely spaced intervals while avoiding contact with sharp edges The harness should be secured with tie wraps every two feet or less in areas where damage may occur Tie wraps should be tightened with a tie wrap gun set to the appropriate setting to correctly secure the harness without allowing a loose mounting but also not causing the harness to be over tightened Over tightening the tie wrap to the harness can crush the harness jacket and conductors causing harness damage and system failures Radar Harness Electrical Checks The radar harness is connected to the radar sensor using an eight pin connector Figure 2 22 4011861a Figure 2 22 2 Diagnostics Troubleshooting and Testing Table C Radar Harness Connector Pinouts pn out 12V or ignition The radar harness connector consists of harness connector housing part number AMP MQS 1 1534299 1 socket pin part number AMP 965707 1 WABCO socket AMP 962885 0 2 0 5mm 2 or AMP 965906 0 75mm
55. ntenance Manual MM 1306 Revised 11 15 Cruise Control not set Following distance alert 4011857a Figure 1 8 Adaptive Cruise Control Set When the ACC speed is set the set cruise speed appears on the display When a slower vehicle is detected in front of the vehicle ACC will attempt to reduce the speed to the speed of the lead vehicle This speed adjustment may momentarily drop lower than the lead vehicle in order to maintain a 3 6 seconds following interval between the vehicle and the vehicle ahead when appropriate While ACC is on the display will emit visual and audible collision warnings and the system will control throttle and apply engine and service brakes if needed while attempting to maintain a set following interval Figure 1 9 Cruise Control set Cruise Control set No lead vehicle detected Lead vehicle detected 4011858a Figure 1 9 Following Distance Alert Adaptive Cruise Control Set When the vehicle is in cruise control mode the Following Distance Alert will provide an audible alert and the in cab dash display screen will turn yellow if the driver uses the accelerator pedal to override the ACC and approaches a vehicle too closely The Following Distance Alert will not provide warnings when the vehicle speed is below 15 mph Figure 1 10 1 Introduction System Limitations The OnGuard CMS only brakes for moving objects located directly in front of the vehicle and does not operate when the speed
56. o warns on stationary objects such as disabled cars to alert drivers of potential obstructions in their lane OnGuard s Adaptive Cruise Control ACC automatically adjusts the vehicle s set cruising speed to maintain a safe following distance whenever a vehicle ahead is detected OnGuard should only be considered as an aid and is not intended to replace driver control over the vehicle at any time The active braking application is intended to assist the driver to avoid or reduce the severity of a collision The driver remains in control of the vehicle and ultimately determines the actions that are necessary for safe operation OnGuard warnings will not be issued below a vehicle speed of 15 mph How does OnGuard work OnGuard uses a forward looking dual beam radar sensor to detect objects in the vehicle s path at distances up to 650 feet away The dual beam radar uses far range and near range detection to expand the total width of radar coverage What is ACC How can I enable disable it The ACC maintains a safe following interval of 3 6 seconds between the vehicle and the vehicle ahead When there is no moving vehicle detected ahead the set cruise speed resumes automatically To enable ACC simply press the ON and Set button for cruise control in the vehicle the same as using conventional cruise control The driver can disengage the ACC at anytime by applying the brakes applying the clutch if the ve
57. on a radar device mounted to the front of the your vehicle If the radar is not mounted correctly has come loose or the alignment of the device is not adjusted properly the unit could detect objects that may not be in the vehicle s intended path Check the OnGuard device during pre and post trip inspection for proper mounting or broken or loose mounting brackets Any issues should be reported to the fleet manager What happens if the driver receives an OnGuard System Error Notification Can the vehicle still be driven lf the driver receives an OnGuard System Error Notification the display will turn amber and a Diagnostic Trouble Code DTC will appear While the vehicle will still be operable certain OnGuard functions such as standard cruise control and CMS will not be available It is recommended that the driver find a safe place to park and turn off the ignition for one to three minutes This will reboot the systems and should correct most errors If the condition persists contact the fleet manager to review the issue Any DTC information should be recorded for troubleshooting purposes 4 Frequently Asked Questions Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Meritor WABCO Vehicle Control Systems 2135 West Maple Road Printed in USA Troy MI 48084 7121 866 OnTracl 668 7221 Copyright 2015 Revised 11 15 MERITOR WABCO meritorwabco com Meritor Inc Maintenance Manual MM 1306 16579
58. onitor traffic and apply the brakes if needed to avoid a crash Failure to do so can result in serious personal injury or death and or severe property damage Driver Information system Malfunction Information 4 amp WARNING Do not allow the fascia to become blocked by any foreign matter dirt snow ice stickers etc otherwise a system fault will occur and the OnGuard CMS will be disabled If the system becomes disabled immediately inspect the OnGuard CMS fascia for a blockage and correct it as necessary Whether or not the radar is working correctly it is the driver s responsibility to apply the brakes when necessary to maintain vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING lf the OnGuard CMS is not correctly tracking vehicles that are in your lane or is tracking vehicles that are not in your lane this may be due to radar operational issues Typically these are radar operational issues that can result from the following problems e Debris dirt snow ice on the radar fascia or between the fascia and the radar sensor This must be removed e A loose radar sensor or one that is not tightly secured on the mounting bracket e The radar sensor may be too close to or actually contacting the bumper as mounted There should be at least 1 4 inch of clearance between the fascia radar sensor or bracket and the bumper e Radar interfe
59. or lead vehicles at distances greater than 150 ft Stopping the vehicle while traveling in traffic is acceptable but will increase the time needed to complete the alignment procedure 4 Wait until the Radar Aligned screen in Figure 2 21 appears This typically takes 10 to 30 minutes of driving time to complete RADAR ALIGNMENT Radar Aligned 100 4010388a Figure 2 21 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 5 Once completed the system will revert to one of the normal operating screens This completes the Radar Sensor Service Alignment procedure The OnGuard system should now be aligned The key must now be cycled off for a few minutes to save the alignment NOTE If the radar alignment fails a specific radar alignment error will appear that indicates the direction in which the sensor is incorrectly aimed If this occurs review the radar sensor installation determine if the radar sensor needs to be repositioned or in some way serviced and then re perform the Radar Sensor Service Alignment procedure Contact OnTrac if the radar service alignment fault cannot be resolved NOTE As the vehicle continues to be driven following the Radar Sensor Service Alignment the OnGuard system performs continuous adjustments to the radar sensor alignment Further service alignments will generally not be required unless the radar sensor mounting assembly is disturbed becomes loose or the radar sensor requires repl
60. parameter enabled k k O No N No No oO Go ir Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 2 Diagnostics Troubleshooting and Testing Display FMI Color 1590 19 Amber OnGuard system Disabled 1633 19 Amber OnGuard system Disabled 2919 Amber OnGuard system Disabled 9023 Amber OnGuard System Disabled 5606 Amber OnGuard System Disabled Incorrect J1939 ACC Mode data in ACC1 message received from engine This code may indicate the engine has recognized a radar malfunction e e g blocked radar and has disabled Cruise Control This code may also indicate the engine is not configured for operation with an Adaptive Cruise Control system Incorrect J1939 Cruise Control Pause Switch data received in CCVS1 message from engine ECM body cab or chassis controller J1939 Electronic Brake Controller 5 EBC5 message from ABS not received or intermittent J1939 Adaptive Cruise Control 2 ACC2 message from the OnGuard display or instrument cluster not received or intermittent J1939 Cruise Control Vehicle speed 3 CCVS3 message usually from the engine not received or intermittent Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 System Reaction Cause Description Action Repair Instructions Check for multiple active DTCs in the radar lf there is more than one active code repair all other codes then cycle the ignition to clear the er
61. r death and or severe property damage can result 44 WARNING Using the Resume option will return the vehicle to the last stored set speed It is the driver s responsibility to be aware of what the last stored speed is and ensure it is safe and legal for the current road traffic and weather conditions Failure to do so can result in serious personal injury or death and or severe property damage system Functions and Miscellaneous Information 44 WARNING Always keep the path of the radar clear of obstructions Snowy and muddy conditions can cause the radar to become blocked or debris to get between the fascia and radar Always remove snow mud or other debris from the front of the fascia and between the fascia and radar immediately to ensure proper radar operation Do not allow the installation of bumpers shields deflectors guards or other such items in front of the radar area Do not allow items to block the radar or the OnGuard CMS will have limited or no functionality which can lead to an accident Serious personal injury or death and or severe property damage can result 4 amp WARNING The OnGuard CMS requires time to recognize an object or potential obstacle An object moving at a speed of approximately 20 mph or more may not be recognized in enough time to produce a warning or brake the vehicle Never wait for the OnGuard CMS to intervene when a potentially hazardous situation arises The driver must always m
62. r is responsible for the vehicle s speed distance between other vehicles and braking the vehicle if necessary to avoid a collision Never wait for an OnGuard CMS warning before applying the brakes Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING The driver is responsible for understanding the operation and limitations of the OnGuard CMS before operating the vehicle Failure to do so can result in serious personal injury or death and or severe property damage Driver Information Environment Related Information 44 WARNING The driver should consider the benefit risk of using OnGuard Collision Mitigation System CMS under the following conditions e Weather such as rain sleet snow ice heavy fog as well as smoke or dust These conditions can make roads slippery which can cause a spinout or block or limit the radar s distance sensing ability e Construction zones off road dirt roads or muddy roads with loose surface These conditions can cause the wheels to lose traction and limit OnGuard s ability to provide appropriate warning and adequate braking e Curvy or winding roads roads with sharp turns Curvy roads can make it difficult for the OnGuard CMS radar to track vehicles in it s path While in a sharp turn or if the preceding vehicle is in a sharp turn OnGuard may no longer track a vehicle in front of you Your vehicle could then
63. re the radar sensor connector or protective rubber boot has been incorrectly installed following service When the connector is not fully seated during installation or repair activities water corrosive road salts or other contaminants can enter the radar sensor connector When salt water interacts with electrical current corrosion occurs quickly When this occurs severe corrosion can occur on the radar sensor and harness pins If this corrosion is not detected early enough a fault may be generated and the radar sensor and radar sensor harness may need to be replaced Corrosion in the connector may also occur if the radar sensor harness becomes damaged somewhere along the length of the harness Water and corrosive road salts can wick down the harness and into the radar sensor connector If damage to the harness is detected early enough damage to the radar sensor connector can be avoided Use of rubber boot to protect the connector improves the corrosion performance of the connector After the harness connector has been mated to the radar sensor connector slide the boot over the harness connector body This will ensure that water salt mud ice snow and other debris will not enter the connector during vehicle operation Radar Blocked The radar sensor is protected by a fascia The fascia and the radar sensor must not be blocked in any manner The radar sensor can become blocked by snow ice dirt or other foreign matter If this occurs
64. rence from other radar sources or strong radar reflections lf OnGuard CMS is not functioning correctly or as expected immediately have the OnGuard CMS inspected to correct the issue Whether or not the radar is working correctly it is the driver s responsibility to apply the brakes when necessary to maintain vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 44 WARNING When active Diagnostic Trouble Codes DTCs are present the OnGuard CMS may be partially or fully disabled depending on whether the DTC s is associated with the Adaptive Cruise Control ACC functions or the CMS functions If OnGuard CMS is not functioning correctly or as expected have the Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Driver Information OnGuard CMS inspected immediately to correct the issue Whether or not the radar is working correctly it is the driver s responsibility to apply the brakes when necessary to maintain vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING lf the OnGuard CMS is not correctly tracking vehicles that are in your lane or is tracking vehicles that are not in your lane the radar may not be aligned correctly If this occurs immediately have the OnGuard CMS radar inspected and corrected as needed Refer to the Radar Sensor Service Alignment procedure Whe
65. replace driver control of the vehicle at any time OnGuard is only intended to initiate braking of the vehicle in an effort to reduce the severity of an impending collision OnGuard will not become active below 15 mph 24 kph It is not to be relied on to always function and is a mitigation safety system In the event the OnGuard CMS requires activation of the foundation brakes there is a limit to its maximum braking ability by design The driver is expected to intervene and assume control of the braking of the vehicle OnGuard should not be relied on to track vehicles when either or both vehicles base and lead vehicle have entered and are traveling through a curve in the road ACC is not recommended for use in winding curving roads OnGuard should not be expected to track smaller objects such as motorcycles mopeds bicycles etc When operating a vehicle always use safe driving techniques The driver is ALWAYS the most important factor in safe vehicle operation 1 Introduction In Cab Dash Display The in cab dash display has five different screen background colors Blue General operating mode with no target vehicle detected Green Target vehicle detected ahead Yellow Following distance alert System capability warning Red Collision warning Stationary object warning Amber Diagnostic Trouble Code DTC screen Operating Modes Adaptive Cruise Control Not Set The vehicle operates as usual when the ACC
66. resistors are missing Repair and replace as necessary e f the resistance between Pins 3 and 6 is equal to 120 ohms one of the SAE J1939 circuits is open or one of the termination resistors is missing Repair and replace as necessary e f the resistance between Pins 3 and 6 is less than 60 ohms more than two termination resistors are installed the SAE J1939 harness is shorted or one or more ECUs on Figure 2 23 the SAE J1939 network are damaged Remove each ECU connected to the bus one by one until the bus resistance Disconnect the OnGuard Display harness connector and perform returns to 60 ohms Repair and replace as necessary the following electrical checks 4011862a NOTE Make sure to check the firewall pass thru Table D Radar Harness Connector Pins connections for loose or broken connections 7 Key On Engine Off Check voltage to ground on Pins 3 and Pin Circuit o i e The voltage readings on pins 3 and 6 will fluctuate but should always be within a certain range and should never a Pin 3 should be 2 5 volts to 5 volts Pin 6 should be 2 49 volts or less 11939 Low The total voltage between pins 3 and 6 should be 31939 High approximately 5 volts e lf the voltages are out of range review J1939 diagnostics with the vehicle OEM 32 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Key On Engine Off Check Pin 4 power to Pin 5 ground for 12 volts e f power shows 12 volts go to step 2 e
67. ror recognition in the engine lf this is the only active DTC verify the engine ECM has the Adaptive Cruise Control parameter enabled Verify operation of the Cruise Control Pause switch and the ECU broadcasting this information on the J1939 network engine ECM body cab or chassis controller is functional Verify the correct radar part number is installed on the vehicle Verify the ABS ECU is connected to the J1939 network and is functional Verify the correct OnGuard radar part number is installed on the vehicle Verify correct ABS part number is used Cycle ignition to clear DTCs after ABS servicing Intermittent power or J1939 network connection to OnGuard display or instrument cluster Verify harness is correct Verify correct software version in OnGuard display or instrument cluster Verify the correct OnGuard radar part number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM has the Adaptive Cruise Control parameter enabled Display FMI Color 19 5606 Amber OnGuard system Disabled OnGuard system Disabled Bi a Bi Bi OnGuard System Disabled OnGuard System Disabled OnGuard System Disabled O1 O1 O1 O1 OD OD OD OD CO CO CO CO oO NO es 2 Diagnostics Troubleshooting and Testing Incorrect J1939 Adaptive Cruise Control Readiness Status data received in CCVS3 message from engine
68. s is turned up sufficiently to make the screen visible If the display brightness adjustment is correct or the adjustment screen cannot be seen the display is not 2 Diagnostics Troubleshooting and Testing NOTE If the display remains dark after performing a display update attempt the update again until the procedure is successful NOTE OnGuard is sensitive to faults in other vehicle systems and will set a DIC as a reaction As such it is recommended that all faults in any other vehicle ECUs are diagnosed and repaired prior to diagnosing OnGuard DICs receiving any power or input signals This can be caused by problems in the electrical harness Refer to Display Harness Electrical Checks in the Electrical System and Harness Troubleshooting Section If the OnGuard display shows an amber error screen use the following Error System Failure Screen Repair Table to determine the correct repair action If the error requires use of TOOLBOX Software use the Diagnostic Trouble Code Table section to identify the correct repair action Also refer to the Troubleshooting Section and Sub Section of this manual listed in the last column of the Diagnostic Trouble Code Table Table A System Error Screen Repair Action Troubleshooting Display Message Repair Action section Remove snow mud etc from fascia or between Blocked System Error radar and fascia OnGuard DISABLED SERVICE VEHICLE SPN FMI Count 517503 14 2 4010632a
69. t How does OnGuard respond differently A stationary object is an object that was never detected as moving When the object comes into the radar range and does not move such as a disabled car the radar classifies it as stationary and will provide only visible and audible warnings but will not activate the brakes A stopped object is an object that was detected moving and came to a stop When the radar detects the object as moving and decelerates to a complete stop the radar will classify the object as stopped and will provide visible and audible warnings as well as activate the CMS braking sequence if necessary to mitigate rear end collision Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 37 4 Frequently Asked Questions What objects does OnGuard warn on or actively brake on OnGuard warns and reacts to objects such as cars trucks or buses that are moving in the same direction as the vehicle on the road In addition OnGuard provides only visual and audible warnings on stationary objects such as disabled cars that are in the path of the vehicle to alert the driver of potential obstruction The system will not apply the brakes on stationary objects OnGuard will not warn or react to oncoming traffic or traffic crossing the vehicle s driving lane ls OnGuard active while at very low speeds Will the system react to stop and go traffic OnGuard will not react to objects when the vehic
70. t speeds above 15 mph Cruise Control Cruise Control is the standard OEM system that maintains a vehicle speed set by the driver System Components Radar Sensor The radar sensor is used to detect vehicles and obstacles for the OnGuard Collision Mitigation System It is mounted in the front of the vehicle near the center of the bumper and recessed in the bumper in most applications Figure 1 1 The sensor has an electrical connector that provides power ground and communication to the SAE J1939 network which is required for correct operation The mounting orientation is determined by the 3 hole bolt pattern of the bracket The radar sensor generally is mounted with the connector on the driver s side of the vehicle The sensor connector is protected by a rubber boot This boot should fully cover the connector upon completion of the sensor installation or repair 4010334a Figure 1 1 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 G 1 Introduction Fascia The fascia is a protective cover for the radar sensor and is assembled to the same bracket on which the radar sensor is mounted Some vehicle manufacturer s use other fascia designs Only original equipment fascias supplied by Meritor WABCO and the vehicle manufacturer may be used to protect the radar sensor Figure 1 2 The fascia should not be blocked by any foreign matter dirt snow ice stickers etc otherwise a system fault will occur and the OnGu
71. tem Reaction Cause Description Action Repair Instructions Check power ground and load test at the radar harness connector Place the vehicle back in service and the code will become stored after driving above 10 mph for one minute 917659 7 Amber OnGuard Motor elevation Fault while setting Verify no visible ohysical damage to radar system Disabled back the original plate position Bootloader invalid Bootloader and 917996 7 Amber OnGuard system Disabled application interface Hazard Alert Messages Read and observe all Warning and Caution hazard alert messages in this publication They provide information that can help prevent serious personal injury damage to components or both 4 amp WARNING To prevent serious eye injury always wear safe eye protection when you perform vehicle maintenance or service Release all air from the air systems before you remove any components Pressurized air can cause serious personal injury Refer to the vehicle manufacturer s service manual for instructions Radar Inspection and Preventive Maintenance Radar Inspection NOTE It is recommended to perform the radar inspection process every time normal preventive maintenance is performed on the vehicle 1 Remove the fascia and inspect the bumper positioning Check if the bumper is physically touching the radar sensor fascia or mounting bracket at any point e if the bumper is touching the fascia Reposition the
72. tem and Harness Troubleshooting CAN BUS ERROR No J1939 Messages CHECK CONNECTIONS 4010391a ACC is Inactive CMS is still active Cruise control TOOLBOX is disabled Diagnose with TOOLBOX Software Software and and Diagnostic Trouble Code Table to determine Diagnostic Trouble reason for disabled ACC Code Table CMS 4010379a OnGuard DTCs may be generated and displayed during service procedures on other electrical system components i e engine transmission ABS etc If the OnGuard display screen turns amber with error screens or DTCs visible after the vehicle has been serviced for other vehicle system issues cycle the ignition OFF for one minute turn the ignition back ON start the engine and run at idle speed for one minute OnGuard DTCs caused by other systems that have been repaired should be cleared If active DTCs remain continue troubleshooting lf the OnGuard Collision Mitigation System is not correctly tracking vehicles that are in your lane or is tracking vehicles that are not in your lane this may be due to radar operational issues Typically these are radar operational issues that can result from the following problems e Debris dirt snow ice on the radar fascia or between the fascia and the radar sensor This must be removed Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 9 2 Diagnostics Troubleshooting and Testing e The radar sensor may be loose or not
73. tems It also cannot detect vehicles of unusual shape or with limited metal surfaces such as recreational vehicles horse drawn buggies or logging trailers As such OnGuard may provide little or no warning of these objects in the vehicle s path It is the driver s responsibility to be aware of these objects and apply the brakes as necessary to avoid an accident It is always the driver s responsibility to apply the brakes if needed to avoid an accident Never wait for an OnGuard CMS warning before applying the brakes Failure to apply the brakes when needed can result in serious personal injury or death and or severe property damage System Function Information 4 amp WARNING Once the driver applies the brake the OnGuard CMS will be disabled and no longer provide braking intervention It is the driver s responsibility to maintain a safe speed and distance from other vehicles and brake as necessary to maintain vehicle control Failure to apply the brakes when necessary can result in serious personal injury or death and or severe property damage 4 amp WARNING The driver is responsible for selecting a safe and legal speed setting that is appropriate for the traffic road surface and weather conditions Adjust the speed setting as necessary when driving in reduced visibility or potentially slick conditions Driving with OnGuard CMS at a speed that is inappropriate for following a vehicle safely can lead to an acc
74. the driver s responsibility at all times to use safe driving techniques be alert maintain a proper distance between vehicles and brake the vehicle if needed to avoid a collision Never wait for OnGuard CMS to provide a warning or braking before applying the brakes Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING OnGuard CMS may initiate forward collision warnings or in seldom cases unwanted or inappropriate acceleration or deceleration In such cases the driver has to either deactivate or override the system as necessary to maintain proper vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING lf the driver accelerates to a faster speed than the one set to overtake a vehicle OnGuard CMS will return to the last stored speed once the vehicle has been overtaken The driver must be aware of the last stored speed to make sure that the vehicle can remain in control or deactivate the system Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING OnGuard CMS may take a few moments to adjust to the selected speed Adjust the speed as necessary to accommodate the current road traffic and weather conditions Use care to avoid dramatic acceleration or deceleration of the vehicle which can lead to a loss of control Serious personal injury o
75. ther or not the radar is working correctly it is the driver s responsibility to be aware of vehicles in front of the driver s vehicle and apply the brakes when necessary to maintain vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING lf OnGuard CMS is not providing alerts as expected immediately have the OnGuard CMS inspected to correct the issue Whether or not the radar is working correctly it is the driver s responsibility to apply the brakes when necessary to maintain vehicle control Failure to do so can result in serious personal injury or death and or severe property damage 4 amp WARNING In order to reduce the potential danger of injuries caused during OnGuard activated vehicle decelerations the driver and front passenger must always be correctly seated and with seat belts correctly fastened when operating the vehicle Additionally the driver should secure all loose items in the cab so that they will not fly forward during a full brake application v Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 pg 1 10 14 28 30 34 36 37 38 section 1 Introduction Overview OnGuard system Components How OnGuard Works In Cab Dash Display Operating Modes 39 system Limitations Section 2 Diagnostics Troubleshooting and Testing General Information Radar Sensor and Display Software Levels Error Screens
76. tightly secured on the mounting bracket e The radar sensor may be too close to or actually contacting the bumper as mounted which will affect the radar signal There should be at least 1 4 inch of clearance between the fascia radar sensor or bracket and the bumper Contact your vehicle manufacturer representative on adjustments to the bumper for radar sensor clearance e The radar may not be aligned correctly Refer to the Radar sensor Service Alignment procedure lf the vehicle s standard cruise control is working and OnGuard Adaptive Cruise Control ACC is not working consult your dealer or engine supplier This can occur if the engine controller has been re programmed or the engine parameter that activates Adaptive Cruise Control has been turned off Consult with your dealer or engine supplier for engine software and parameter adjustments TOOLBOX Software NOTE To download TOOLBOX Software visit meritorwabco com To access the Meritor WABCO TOOLBOX Software from the desktop screen double click on the Meritor WABCO TOOLBOX icon Figure 2 4 4010594a Figure 2 4 From the message box that appears click on the OnGuard Radar Diagnostics button Figure 2 5 Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 NMERITOR WABCO TOOLBOK 4012502a Figure 2 5 NOTE OnGuard will only communicate on J1939 Verify that the correct device and protocol are selected under Adapter
77. tional and has correct software and parameters Cycle the ignition to clear DTCs after engine servicing Verify the engine ECM is functional and has correct software and parameters Verify the correct OnGuard radar part number is installed on the vehicle Cycle the ignition to clear DTCs after engine servicing Verify engine ECU is functional and has correct software and parameters Display FMI Color 560 Amber OnGuard system Disabled 560 19 Amber OnGuard system Disabled 563 19 Amber OnGuard system Disabled 574 19 Amber OnGuard system Disabled 596 19 Amber OnGuard system Disabled 597 19 Amber OnGuard system Disabled 2 Diagnostics J1939 Electronic Transmission Controller 1 ETC1 message not received or intermittent Incorrect J1939 Transmission Driveline Engaged data received in ETC1 message from transmission Incorrect J1939 Anti Lock Braking Active data received in EBC1 message from ABS Incorrect J1939 Transmission Shift In Process data received in ETC1 message from transmission Incorrect J1939 Cruise Control Enable Switch data received in CCVS1 message from engine ECM body cab or chassis controller Incorrect J1939 Brake Switch data received in CCVS1 message from engine ECM body cab or chassis controller Troubleshooting and Testing System Reaction Cause Description Action Repair Instructions Verify the correct OnGuard radar part number is insta
78. tor by depressing the lock tabs on both Sides of the radar connector Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 5 Remove the radar sensor from the radar sensor bracket by removing the three M6 nuts on the rear of the radar sensor bracket 6 Verify that the mounting bracket bolts are securely tightened and the mounting bracket is in good condition If the bracket is loose repair or replace as necessary NOTE Care should be taken to verify the correct part number radar is being installed on the vehicle as all CMS radars look alike 7 Mount the replacement radar sensor to the bracket Tighten the mounting nuts to 61 75 in lb 6 9 8 4 Nem No motion should occur between the bracket and the radar sensor after the sensor has been correctly installed on the mounting bracket 4 8 Verify that there is at least 1 4 inch gap between the radar sensor and the bumper If there is not a 1 4 inch gap contact the manufacturer for assistance in adjusting the bumper This gap is critical to the correct operation of the OnGuard Collision Mitigation System 9 Reconnect the sensor connector by pushing on the connector until it snaps into the radar sensor Slide the rubber boot over the connector until the connector is completely covered by the boot If required snap the cable clip into the hole at the corner of the bracket and make sure the harness does not rub against any sharp edges 10 Replace the fascia using the M6 x
79. unexpectedly accelerate to the previously selected speed e Heavy or complicated traffic entry and exit ramps downhill cross traffic and intersections OnGuard CMS is not capable of taking into account these complex traffic situations and respond to each scenario It cannot track traffic and objects traveling perpendicular to it s path Driving in these conditions with OnGuard CMS active can produce false warnings unexpected braking or no response at all Serious personal injury or death and or severe property damage can result 44 WARNING The OnGuard Collision Mitigation System CMS is designed to monitor only the distance between your vehicle and the vehicle moving in the same direction directly ahead of it It may not identify a vehicle moving TOWARDS it or stationary Objects in the road such as a vehicle that is stopped in traffic or disabled As such the OnGuard System will not provide engine torque control or braking The driver must always be aware of the objects in front of his vehicle and be ready to apply the brakes if required Failure to apply the brakes when needed can result in an accident Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 Driver Information OnGuard CMS is designed to detect and track common size automobiles and trucks with metal surfaces It is not designed to detect smaller objects such as pedestrians narrow vehicles motorcycles mopeds bicycles or similar sized i
80. ystem caused Diagnostics to test the Anti Lock Braking OnGuard to be temporarily System disabled Verify the correct radar part number is installed on the vehicle Verify the correct ABS ECU part number is used on the vehicle Cycle the ignition to clear DTCs after ABS servicing 916500 12 Amber OnGuard Malfunction in the Anti Lock Verify the correct ABS ECU part number is system Disabled Braking System caused used on the vehicle ee repay Use Meritor WABCO TOOLBOX Software disabled PC Diagnostics to test the Anti Lock Braking system Verify the correct radar part number is installed on the vehicle Cycle the ignition to clear DTCs after ABS servicing Meritor WABCO Maintenance Manual MM 1306 Revised 11 15 23 2 Diagnostics Troubleshooting and Testing System Reaction Cause Description Action Repair Instructions 016501 916503 016507 017505 017525 On On on _ t t _ t ep on on D amp oO oo FMI 12 k oO i Ba DO DO ee 14 13 13 Display Color Amber Amber Amber Amber Amber Amber Amber Amber OnGuard system Disabled OnGuard system Disabled OnGuard system Disabled OnGuard system Disabled Blocked Radar Remove Debris OnGuard system Disabled OnGuard system Disabled OnGuard system Disabled Extended Plausibility check for signal Brake System accepts AEBS XBR OnGuard ra

MM-1306 - Meritor WABCO

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