Home

Model 387 Instrument System Service Manual

1. Model 387 Instrument System Service Manual With the pointer at READ PUBLIC BUS press the Select key The HDT will display the following READ PUBLIC BUS Y More items available TACHOMETER Press the Down key to see ENGINE LOAD To see the names of the J1708 data bus gauges the for which the Interface Module has been programmed use the Up and Down keys to scroll through the list The J1708 data bus gauge names are TACHOMETER ENGINE LOAD ENGINE OIL PSL BOOST PRESSURE ENG BRAKESAV OIL TB COOLANT TEMPERATURE and SPEEDOMETER Other gauge names that appear are private data bus gauges To see the data the Engine ECU is sending to a particular gauge move the pointer to that gauge s name and then press the Select key After a few sec onds the HDT will display the name of the gauge and the value being sent to it TACHOMETER VALUE xxxx xxxx is the value sent to the tachometer If the Engine ECU is broadcasting data for the selected gauge that data should appear after VALUE within 15 seconds This data can be compared to the corresponding gauge indication If data does not appear after 15 seconds the Engine ECU is not broadcasting data for the selected gauge Follow the troubleshooting procedures To select another gauge press the Return key to exit this display and return to the gauge list You can also press the Return key again to go back to previ ous menus to access other functions
2. Model 387 Instrument System Service Manual 7 To change the configuration data in the Interface Module move the pointer to MODIFY CONFIG and press the Select key The HDT will display MODIFY CONFIG af Vates depending upon the gauge TRAC BRAK APPLD PSI name you select MAIN TRANS TEMP XXX LL xxx temperature value in F 8 Move the pointer to MAIN TRANS TEMP XXX and press the Select key The HDT will display a list of transmissions that may be installed in the vehicle ALLISON W O RETARDR ii eel is ao ALLISON W RETARDER e venice ang anno Ne MANUAL TRANSMISSION temperature at which the warning LED will light MODIFY a This screen is used to select which 9 Move the pointer next to the name of the transmission type that is installed in the vehicle then press the Select key The HDT will display MODIFY CONFIG TRAC BRAK APPLD PSI PMAIN TRANS TEMP XXX XXX temperature value in F Return to the MAIN MENU by pressing the Return key once Store the Main Transmission Type value in the Interface Module by moving the pointer to WRITE CONFIG and then pressing the Select key The HDT will display SENDING THE Displayed while the HDT CONFIGURATION sends the updated data to BLOCK xxx yyy the Interface Module If the value was successfully stored the HDT will display the MAIN MENU At that point you can use the Return key to go back to previ ous menus When fin
3. The vacuum transducers are not identical The Air Filter Restriction end must go to port 5A and the Fuel Filter Restriction end must go to port 5B as shown in Figure 3 4 3 1 3 Vacuum Pressure and Pressure Vacuum Transducer Modules Two types of combination modules are available One type contains a pressure trans ducer and an Air Restriction transducer the other type contains a pressure transducer and a Fuel Filter Restriction transducer Combination modules are not interchangeable and are mounted at port 5A 5B If used the Air Filter Restriction end must go to port 5A and the Fuel Filter Restriction end must go to port 5B as shown in Figure 3 4 CAUTION The sudden application of pressure to transducer modules can destroy them and void their warranties Always apply pressure gradually and at a rate that does not exceed 150 PSI per second 3 2 J1708 Data Bus The J1708 data bus is a public data bus consisting of a pair of twisted wires It allows electronic devices and other equipment in the vehicle to send and receive data The two wires making up the J1708 data bus are part of the vehicle s wiring harness Be cause it connects to many different components in widely separated locations a prob lem with the data bus or with one of the component s connected to it can sometimes be hard to isolate For a complete description of the J1708 data bus and data format refer to SAE J1708 document Standard For Data Communications Interface and to
4. Except the SMC Pointer Sweep 5 29 5 5 6 All Gauge Pointers Except the SMC Pointer Sweep 5 30 5 5 7 Only the SMC Pointer Sweeps and No Messages Appear 5 32 5 5 8 SMC Pointer Sweeps and a NO DATA Message Appears 5 32 5 6 Warning Messages 2 on ee ee ee 588 5 7 Backlighting Problems 1 on ee ee ee 534 5 7 1 Two Inch Gauges 5 34 5 7 1 1 One Gauge Has No Backlighting 5 34 5 7 1 2 More Than One Gauge Has No Backlighting 5 34 5 7 1 3 All Gauges Plus Tachometer Have No Backlighting 5 35 5 7 2 SMC Has No Backlighting 5 8 Select Reset Switches not Working 5 9 Wiring Diagrams 6 Using the Handheld Diagnostic Tool 6 1 Care and Cleaning 6 2 Description 2 6 3 Reading Engine ECU Gauge Data 6 3 1 Procedure 6 4 Reading Private Bus Gauge Data 6 4 1 Procedure 6 5 Viewing Configuration Data 6 5 1 Procedure 6 6 Programming and Verifying Ports 5A and 5B 6 6 1 Procedure 6 7 Programming the Main Transmission Temperature Warning LED 6 7 1 Procedure 6 8 HDT Spare Parts 072 40245 D AMETEK DIXSON List of Illustrations Figure 1 1 Figure 2 1 Figure 2 2 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 Figure 3 9 Figure 3 10 Figure 3 11 Figure 3 12 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5
5. 2 on page 4 5 shows the contact assembly and the placement of the tab 072 40245 D Functional Description AMETEK DIXSON TT Engine Sensors Engine Oil Pressure Engine Oil Temperature Engine Coolant Temperature Tach Input Manifold Boost Engine Load J1708 Data Bus and Private Bus Driven Gauges The sensors for the Tachometer Engine Oil Pressure Engine Coolant Engine Oil Temperature Engine Load and Manifold Boost gauges are connected to the En gine ECU The Engine ECU converts these sensor inputs into data which it sends to the Interface Module over the J1708 data bus For that reason these gauges are called J1708 data bus gauges J1708 data bus gauges and connections are shown in Figure 3 7 Private Bus Wire 636 to pin G J1708 data bus Wire 418 to pin F J1708 data bus Wire 417 to pin E Private Bus Engine Wire 637 ECU E Tachometer Manifold Engine Load Engine Oil Engine Oil Engine Coolant Boost Pressure Temperature Temperature Figure 3 7 J1708 Data Bus Gauges Functional Description The axle and transmission temperature sensors the ammeter fuel level and pyrome ter sensors and pressure vacuum inputs are connected directly to the Interface Mod ule and are referred to as private bus driven gauges Tachometer The tachometer is similar in construction to the 2 inch gauges except that it is larger and is not programmable Engine speed data o
6. Inch Gauge 4 4 Reprogramming a Two Inch Gauge 4 5 Servicing the Interface Module 4 5 1 Removing the Interface Module 4 5 2 Reinstalling the Interface Module 4 5 3 Reprogramming the Interface Module 4 6 Spare Parts Listing 5 Troubleshooting Procedures 5 1 Required Test Equipment 5 2 Troubleshooting Procedure Start Point 5 2 1 The Initialization 5 3 Troubleshooting Procedures for Two Inch Gauges 5 3 1 Two Inch Gauge Fails Initialization No Pointer over LED Never lights 5 3 2 Two Inch Gauge Passes Initialization but LED Flashes 5 3 2 1 Air and Fuel Pressure Gauges 5 3 2 2 Temperature Gauges 5 3 2 3 J1708 Data Bus Gauges 5 3 2 4 Vacuum Gauges 5 3 2 5 Voltmeter Gauge 5 3 2 6 Ammeter Gauge 5 3 2 7 Fuel Level Gauge 5 3 2 8 Pyrometer 5 4 Troubleshooting Procedures for the SMC 5 4 1 SMC Pointer Never Moves 5 4 2 Speedometer and Odometers Inaccurate 5 4 3 Speedometer Accurate Odometer Inaccurate 5 4 4 Odometer Advances When PTO Engaged 5 4 5 Speedometer Does Not Change Speed When Two Speed Axle Engaged 5 4 6 Engine Hours Do Not Advance 072 40245 D Model 387 Instrument System Service Manual One or More Gauge Pointers Sweep 2 ww eee ee ee ee ee 5 25 5 5 1 AJ1708 Data Bus Gauge Pointer Sweeps 5 26 5 5 2 A Non J1708 Data Bus Gauge Pointer Sweeps 5 26 5 5 3 Several But Not All Gauge Pointers Sweep 5 27 5 5 4 SMC Pointer and All J1708 Data Bus Gauge Pointers Sweep 5 27 5 5 5 All J1708 Data Bus Gauge Pointers
7. SAE J1587 document Standard For Data Interchange Functional Description 072 40245 D Model 387 Instrument System Service Manual Electronic Control Units Electronic Control Units sometimes called ECUs are computerized units that control a particular vehicle subsystem For example an Engine ECU helps maxi mize engine efficiency a Transmission ECU helps control transmission oper ation and an ABS Anti lock Brake System ECU maximizes braking performance An ECU designed for one system cannot be interchanged with an ECU designed for another ECUs are connected to the J1708 data bus They send and receive data to each other and to other devices on the bus Each ECU is programmed to respond to and to gen erate specific data Speedometer with Integrated Message Center The SMC is connected to the J1708 data bus and responds to data from the Engine ECU It uses road speed data from the Engine ECU to calculate its own pointer infor mation It also responds to other data on the J1708 data bus and can display it on the Message Center Examples are engine hours and diagnostic messages The SMC has no calibration switches and requires no programming See Figure 3 5 J1708 bus Wire 418 J1708 bus Wire 417 Road Speed Diagnostic Messages Speedometer with i Message Center SMC Select Reset Switch Select norm open Wire 669 to Vehicle Ground Wire 239 Reset norm open
8. Wire 670 2 Speed Axle Switch Figure 3 5 387 Speedometer with Message Center The SMC calculates and stores its own odometer trip odometer clock and alarm clock information independent of the Interface Module and has a built in audible alarm The SMC automatically displays warning messages when an alarm condition is detected 072 40245 D Functional Description AMETEK DIXSON Select and Reset Switches The Select and Reset switches select set and reset the clock the alarm clock and the trip odometers Their inputs are connected to the SMC by a 4 pin connector on the rear of the speedometer housing If these inputs are not connected the SMC will display odometer information and warning messages only Power Take Off PTO Input This input provides a ground from a switch in the PTO system to the SMC It pre vents the SMC from accumulating miles when the PTO system is in use and the vehi cle is not moving Two Speed Axle Input This input to the back of the SMC is a positive voltage that comes from the 2 speed axle actuator on the gearshift lever When the 2 speed axle is engaged this input causes the SMC to reduce the road speed indication by a factor of 0 73 to 1 Diagnostic Capabilities The instrumentation has a built in initialization routine and several diagnostic capa bilities that can indicate if the system is functioning properly or if a problem exists with it or with the system inputs Power On Initializa
9. from the Engine ECU to individual gauge readings in the instrument system to help determine if the gauge or the Interface Module is defective Vehicle Diagnostic Connector 6 pin version shown To program the Interface Module or to monitor the J1708 data bus plug the appropriate interconnect cable into the HDT and the vehicle s Diagnostic Connector Depending upon the vehicle this con 5 nector may have six or nine pins Both types of interconnect cables have been provided nt 15 Pin Xt Connector C4 6 Pin Round 9 Pin Round Connector Connector Figure 6 2 Connecting the HDT to the Diagnostic Connector 6 3 1 Procedure 1 With the ignition off connect the HDT to the diagnostic connector on the ve hicle using the appropriate adapter See Figure 6 2 The diagnostic connector is usually located under the dash on the driver s side Turn the ignition on The HDT will look for the Interface Module and try to establish communications with it while displaying DATA LINK establishes communications with the vehicle system Typically this takes less than 30 seconds but can take up to 2 minutes 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON a Ifcommunications are established the HDT will display INTERLINK MODULE Indicates the software version DETECTED of the Interface Module Your SOFTWARE VERSION version number may be v1 0 different b If communications are no
10. the Interface Module If the gauge is a pressure gauge and data for that gauge is not present on the private data bus connect the HDT to the diagnostic connector 072 40245 D Troubleshooting Procedures AMETEK DIXSON Troubleshooting Procedures and verify the Interface Module is correctly configured for that gauge If not reconfigure as appropriate d Ifthe Interface Module is correctly programmed for that pressure gauge and data is still not present on the private data bus replace the Interface Module Several But Not All Gauge Pointers Sweep Probable Cause The private data bus or wires are open between the gauges Procedure 1 Locate the first gauge in the daisy chain that is not working and verify its connectors are fully engaged Unplug both connectors and inspect their pins and the gauge receptacle for bent or missing pins Replace the gauge or the 5 wire cable assembly if dam aged If no damage is evident replace the 5 wire cable assembly that connects the first defective gauge to the last gauge on the daisy chain that works If the problem still is not corrected then the last working gauge on the daisy chain could have an internally damaged connector Replace that gauge SMC Pointer and All J1708 Data Bus Gauge Pointers Sweep Symptoms The SMC pointer and the pointers of all public bus gauges sweep the SMC displays NO DATA Note It can take as long as 2 minutes to display NO DATA P
11. the Private Data Bus wires OFF Ignition Switch Jumper gt Turn the ignition off open B Place a small jumper between the dash panel locate the pins 2 and 4 Private Bus and 5 wire cable connecting of the 5 wire cable connector the light bar to the tacho meter and unplug it from the rear of the tachometer Disconnect 10 pin connec D Measure the resistance between tor J3 from the Interface harness connector J3 pins D and G Module Private Bus and Reading is more than 10 ohms Trace the signal wires back through the wiring harness from the 5 wire cable connector to J3 harness connector looking for open wires loose connec tions etc Reading is less than 10 ohms Reconnect the 5 wire cable connector and J3 to the tacho meter and the Interface Module Continue with the next step to see if the problem is in one of the 2 inch gauges Figure 5 17 Checking Private Bus Wire Continuity Troubleshooting Procedures 072 40245 D Model 387 Instrument System Service Manual 6 Using the Handheld Diagnostic Tool The Handheld Diagnostic Tool HDT is designed to be used with the procedures in Chapter 5 of this manual This chapter describes the HDT and how to use it Instru ment System troubleshooting information is found in Chapter 5 The following subjects are covered Care and Cleaning Section 6 1 on page 6 1 Description Section 6 2 on page 6 2 Reading Engine ECU Gauge Dat
12. 13 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Panel and Interface Module System Initialization Speedometer Message Center Displays Instrumentation Block Diagram 387 System Interface Module Pressure Circuit Pressure Vacuum and Pressure Nici Tiansihicer Modules 387 Speedometer with Message Center System Initialization J1708 Data Bus Gauges Ammeter Circuit Voltmeter Circuit Pyrometer Circuit j Axle and Transmission Tepai inetd Fuel Level Circuit E Two Inch Gauge Removal and Reinstallation A Scaleplate Alignment Two Inch Gauge Disassembly Removing the Interface Module Gauge Initialization Checking 2 inch Gauge ar Checking Pressure Gauges with Standard Test Gauge i Checking Temperature Sensor Wiring Testing the Air and Fuel Restriction Gauges Testing the Voltmeter Gauge Testing the Ammeter Gauge Testing the Fuel Level Gauges Testing the Pyrometer Testing the Pyrometer feontinued Troubleshooting SMC Power and Ground Troubleshooting the PTO Power Take Off Input Troubleshooting the Two Speed Axle Input SMC Pointer and All J1708 Data Bus Gauge Pointers Sweep All J1708 Data Bus Gauge Pointers except SMC Sweep Checking Power to the Interface Module Checking Private Bus Wire Continuity Gauge Backlighting Problem except SMC SMC Backlighting Problem i Troubleshooting the Select and Reset Switches I
13. 72 40245 D 072 40245 D Example 1 Example 2 Model 387 Instrument System Service Manual Port 5A and 5B assignments if they MODIFY CONE r are pressure ports If a port is dis DISABLED Bon abled its number will be displayed TRAC BRAK APPLD PSI MAIN TRANS TEMP XXX Always last item in list XXX temperature value Notes Vacuum ports are not displayed Ports 1A and 1B cannot be changed and are not displayed MODIFY CONFIG Port 5A or 5B has been assigned to a PTRAC BRAK APPLD PSI pressure gauge The remaining port MAIN TRANS TEMP XXX is not displayed because it is a vacuum port Using the Handheld Diagnostic Tool AMETEK DIXSON 7 Toreprogram a port or to see to which port a gauge is programmed a Use the Up or Down keys to move the pointer alongside its name b Press the Select key The HDT will display PSA _ Port number to which la lt gauge name gt indicated gauge will be b lt gauge name gt assigned gauge name gt Press the Up or Down key to scroll through the list of gauge names When the pointer is next to the name of the gauge you want to as sign to the displayed port press the Select key If you want to leave the port assignment as it was when you started press the Return key to return to the previous menu or simply unplug the HDT After pressing the Select key the HDT will display the MODIFY CONFIG menu and the pointer will point to t
14. 9 When finished disconnect the HDT 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON 6 4 Reading Private Bus Gauge Data This section describes how to use the HDT to see gauge data on the private bus This is useful while troubleshooting by determining if the Interface Module is broadcast ing data for a particular gauge If no gauge data is being broadcast for a particular gauge the Interface Module may be defective or incorrectly programmed The HDT can also be used to compare data from the Interface Module to individual gauge read ings in the instrument system to help determine if the gauge or the Interface Module is defective Procedure 1 With the ignition off connect the HDT to the rear of any 2 inch gauge using the adapter cable as shown in Figure 6 3 Usually the last gauge in the daisy chain has an unused connector Rear of 2 inch gauge From other P El 2 inch pa To monitor Private Data Bus activity connect a u 15 Pin the cable with the 6 pin round connector to the Connector HDT then connect the adapter cable to the round connector Plug E the small 5 pin connector into the rear of one of the 2 inch gauges Figure 6 3 Connecting the HDT to the Private Bus 2 Turn the ignition on The HDT will look for the Interface Module and try to establish communications with it while displaying DATA LINK establishes communications with the vehicle system Typically this
15. CONFIG Used to accept the changes and send them to the Interface Module To view the configuration data in the Interface Module move the pointer to VIEW CONFIG and press the Select key The HDT will display VIEW CONFIG First gauge names in list are J1708 data bus gauges gt TACHOMETER Remaining gauges are ENGINE LOAD private bus gauges The HDT will a list of J1708 data bus gauge names followed by a list of non J1708 data bus gauge names Non J1708 data bus gauge names will be followed by a high warning value and a low warning value The gauge names in the list may vary with different configurations and may not reflect the gauge configuration in the vehicle To see how a gauge s warning LED is configured move the pointer to the de sired private data bus gauge name and press the Select key If a J1708 data bus gauge name is selected pressing Select does nothing 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON 6 6 Programming and Verifying Ports 5A and 5B This section describes how to use the HDT to program and or verify the program ming of Ports 5A and 5B but only if they are being used as pressure ports Ports 5A and 5B only need to be programmed when the Interface Module has been replaced or if it was found during troubleshooting that the port is incorrectly programmed Pressure ports 1A and 1B are always programmed for Air Tank 1 and Air Tank 2 and cannot be changed with the
16. CU Connector 3 A to wire C Unplug the Engine ECU and meas 417 ure the resistance between circuits 417 and 418 J1708 data bus wires a 418 More than 10 ohms measured Trace circuit wires 417 and 418 back to harness connector J3 looking for damaged wires and missing or broken connector pins Less than 10 ohms measured Reconnect the Engine ECU and Interface Module connectors D Connect the HDT to the diagnostic connector and verify that the Engine ECU is sending data for the gauges on the J1708 data bus Data is being sent Replace the Interface Module Data not being sent Troubleshoot the Engine ECU using the engine manufacturer s procedures Figure 5 15 All J1708 Data Bus Gauge Pointers except SWC Sweep Troubleshooting Procedures 072 40245 D Model 387 Instrument System Service Manual All Gauge Pointers Except the SMC Pointer Sweep Possible Causes Private bus is open between the Interface Module and the gauges Interface Module defective or not receiving power defective gauge Procedure 1 Connect the HDT to the diagnostic connector 2 Switch the ignition on and verify that the HDT establishes a communications link with the Interface Module a If communications are not established follow the procedures in Fig ure 5 16 on page 5 31 to determine the cause If communications are established follow the procedures in Figure 5 17 on page 5 32 If you have followed the procedures in Fi
17. DIXSON 3 6 4 2 Voltmeter Battery voltage is fed to the Interface Module through the ignition switch The Inter face Module converts the voltage into data that it places on the private data bus See Figure 3 9 for the actual wire connections Private Bus Wire 636 to pin G Battery voltage Ignition Wire 673 to pin A Ignition Voltmeter Figure 3 9 Voltmeter Circuit Functional Description 072 40245 D 072 40245 D Model 387 Instrument System Service Manual 3 6 4 3 Pyrometer The signal for the pyrometer begins at a Type K thermocouple that is mounted in the exhaust stream and connected to the Interface Module A thermocouple creates a small voltage less than 33 millivolts that changes depending upon its temperature As the exhaust temperature rises the thermocouple output voltage increases The In terface Module converts the voltage into data that it places on the private data bus Connections are shown in Figure 3 10 Private Bus Wire 636 to pin G Vehicle System Type K Thermocouple Private Bus ES Wire 637 Pyrometer Wire 326 to pin F Pyrometer Wire 327 to pin E Figure 3 10 Pyrometer Circuit Functional Description AMETEK DIXSON 3 6 4 4 Transmission and Axle Temperature Gauges Temperature senders installed in the appropriate axle or transmission housing and connected to the In
18. HDT Note If the port is already being used as an Air Restriction or Fuel Restriction port it cannot be reprogrammed to a pressure port Procedure 1 With the ignition off connect the HDT to the vehicle s diagnostic connector using the appropriate adapter as shown in Figure 6 2 The diagnostic connec tor is usually located under the dash on the driver s side Turn the ignition on The HDT will look for the Interface Module and try to establish communications with it while displaying DATA LINK establishes communications with the vehicle system Typically this takes less than 30 seconds but can take up to 2 minutes a If communications are established the HDT will display INTERLINK MODULE Indicates the software version DETECTED of the Interface Module Your SOFTWARE VERSION version number may be V 1 0 different If communications are not established after 2 minutes repeat this procedure starting at Step 1 with the ignition off If the HDT fails to establish communications after three attempts a problem may exist with the J1708 data bus In this case choose the symptom from Chap ter 5 that best describes the original instrument system failure and follow the troubleshooting procedures After communications are established read the configuration data by press ing the Select key The HDT will display Using the Handheld Diagnostic Tool 072 40245 D Model 387 Instrument System Service M
19. MC also uses road speed messages to compute mileage and display it on the odometers Select and Reset Input These switched inputs are applied directly to the SMC Clocks Clock and Alarm Clock information is generated within the SMC Gauge Backlighting Power for the gauge backlighting comes from an ex ternal dimming control and completely bypasses the Interface Module Pressure and Vacuum Inputs Hose connections to the transducer modules provide pressure or vacuum to the In terface Module The Interface Module converts the pressure and vacuum signals to data and places that data on the private data bus to drive the pressure gauges Con nections are shown in Figure 3 3 072 40245 D Model 387 Instrument System Service Manual If an Air Filter Restriction gauge is present its input must be connected to port 5A If a Fuel Filter Restriction gauge is present its input must be connected to port 5B Other pressure inputs are connected to port 5A or 5B whichever is available depending upon whether an Air Filter or a Fuel Filter Restriction gauge is present Whenever the Interface Module is replaced you must reprogram it recognize the pressure gauges You do not need to reprogram it when replacing defective gauges Private Bus Wire 636 to pin G From vacuum or pressure sources depending upon Private Bus pima the configuration Al Wire 637 to pinD i From Air Tank 1 and Air Tank 2 PRESSURE Variou
20. Model 387 Instrument System Service Manual Document Number 072 40245 Rev D AMETEK DIXSON AMETEK DIXSON Every effort has been made to keep the information in this document current and ac curate as of the date of publication or revision However no guarantee is given or im plied that the document is error free or that it is accurate with regard to any specification AMETEK Dixson reserves the right to modify product designs and spec ifications without notice Revision Table Revision Date Description 01 27 99 Initial release 05 14 99 Changed all occurrences of 2100 to 387 and of self test to initialization Fig 5 22 corrected pin designations on J3 illus tration 09 28 99 Added Chapter 6 Using the Handheld Diagnostic Tool re moved all references to PTM VTM replacement and to the ABS system improved Pyrometer troubleshooting instructions up dated Warning Messages tables to reflect current configuration various other updates and changes resulting from Engineering Dept review 03 01 04 Updated and renamed Figure 5 16 01 01 07 Removed contact information 072 40245 D Model 387 Instrument System Service Manual Table of Contents 1 Introduction 1 1 Purpose and Scope 1 2 How To Use This Manual 1 3 System Components nn 1 4 What Makes the Model 387 Instrument System Dif
21. NK Fuel Level See table above Figure 3 12 Fuel Level Circuit Backlighting Light emitting diodes LEDs permanently mounted inside the gauge provide backlighting The LEDs are not replaceable Theyreceive power from a dimming con trol located on the vehicle dash and that power is passed from one gauge to the next through the 5 wire cable assemblies If a gauge s backlighting fails the gauge must be replaced More information is available in Chapter 5 Backlight power for the SMC comes from the same source used for the gauge backlighting 072 40245 D Functional Description Functional Description 072 40245 D Model 387 Instrument System Service Manual 4 Service Procedures 072 40245 D 4 1 4 2 All components of the instrumentation are easily replaceable in the field This chapter describes the correct method of removing and replacing the system s components For troubleshooting information see Chapter 5 For a functional description of the in strument system see Chapter 3 Note None of the instrumentation s components can be repaired in the field Re place them if defective Opening any of the components voids the warranty The 2 inch gauges may be opened to replace scaleplates without affecting the warranty Some Important Dos and Don ts Do Don t Always unplug all connectors from the Interface Module before performing any welding on the vehicle Extensive and expens
22. T requires no batteries and is powered by the vehicle through the connector AMETEK DIXSON ACTIA E 4 Line 24 Character Display Pointer Identifies the function or value that will be selected when the SELECT key is pressed 4 When present indicates more items are available Press the UP key to see them Y When present indicates more items are available Press the DOWN key to see them Figure 6 1 Hand Held Diagnostic Tool Using the Handheld Diagnostic Tool UP Key Moves the pointer down or the item list up DOWN Key Moves the pointer up or the item list down RETURN Key Usually displays the previous screen in some cases returns to a point earlier in the programming process SELECT Key Selects the functio or value indicated by the pointer and continues to the next screen Not used Connector 072 40245 D Model 387 Instrument System Service Manual 6 3 Reading Engine ECU Gauge Data This section describes how to use the HDT to see gauge data from the Engine ECU on the J1708 data bus This is useful while troubleshooting to help determine if the En gine ECU is broadcasting gauge data to the Interface Module and SMC If no gauge data is being broadcast the Engine ECU the J1708 data bus wiring or another device connected to the J1708 data bus could be defective The HDT can also be used to com pare gauge data
23. a Section 6 3 on page 6 3 Reading Private Bus Gauge Data Section 6 4 on page 6 6 Viewing the Configuration Data Section 6 5 on page 6 8 Programming and Verifying Ports 5A and 5B Section 6 6 on page 6 10 Programming the Alarm Point for the Main Section 6 7 on page 6 15 Transmission Temperature Gauge Warning LED HDT Spare Parts Section 6 8 on page 6 19 6 1 Care and Cleaning The HDT is a precision instrument and is designed for years of trouble free operation in a normal vehicle repair environment It will operate between 10 and 50 degrees Centigrade and is spill resistant Always return the tool to its carrying case when not in use To clean the HDT us only a soft cloth and a mild non abrasive soap Do not use gaso line alcohol or solvents because they will damage the instrument and void its warranty 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON 6 2 Description The HDT is designed to help troubleshoot the 387 Instrument System by letting you see the data on the J1708 and private data buses You will need this tool when install ing a new Interface Module Connecting the HDT to the diagnostic connector 6 or 9 pin on the vehicle allows Engine ECU data on the J1708 data bus to be read and allows the Interface Module to be programmed Connecting it to the rear of a 2 inch gauge with the special adapter allows data on the private data bus to be read The HD
24. anual Displayed while the HDT ga READING THE thers data from the vehicle s CONFIGURATION system xxx and yyy block BLOCK xxx yyy numbers 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON a Ifthe HDT reads the configuration data successfully it will display ACCESS LEVEL Normal is the tool s normal gt NORMAL operating mode Factory is for FACTORY factory use only and requires a password b Ifthe HDT cannot read the configuration data it will tell you so First repeat this procedure from Step 1with the ignition off If still unsuccessful one at a time disconnect other devices that use the J1708 data bus and repeat this procedure each time to isolate the faulty component Press the Select key when the pointer is at NORMAL The HDT will display INTERLINK MINILINK PREAD PUBLIC BUS CONFIGURE Move the pointer to CONFIGURE and press the Select key The HDT will dis play Used to see Main Transmission MAIN MENU Temperature programming VIEW CONFIG MODIFY CONFIG Used to change the configuration WRITE CONFIG Used to accept the changes and send them to the Interface Module 6 Tochange the configuration data in the Interface Module move the pointer to MODIFY CONFIG and press the Select key The display will vary depend ing upon how the Interface Module is configured Two examples follow Using the Handheld Diagnostic Tool 0
25. ar of the housing Hold the gauge and housing face up Line up the hole in the finger of the mask ring over the warning LED in the gauge body and place the mask ring down over the scaleplate When the mask ring is correctly installed the two round notches on the outside will mate with the two guides on the inside of the housing Center the gasket over the mask ring Center the glass faceplate over the gasket Line up the tab on the back of the bezel with the cut out in the housing then twist the bezel turn clockwise until it clicks into place Service Procedures 072 40245 D Model 387 Instrument System S ervice Manual A Gently slide the scaleplate on Cut in the gauge by spreading the cut scaleplate in the scale to allow the scale plate to slide under the pointer Align the warning LED with the hole in the scaleplate Printed circuit Make sure the scaleplate pro board gramming tab is clean then insert it between the five metal contact fingers and the printed circuit board as shown Do not bend the tab Make sure that the holes in the programming tab seat fully under the metal fingers in the contact assembly This automatically configures the Contact assembly Fingers the scaleplate other Tab goes between metal with Programming tab gauge to the function shown on Insert one corner first then
26. are indicated by a click when twisting the ring Twist the clamp ring to the second click only if the first click does not secure the gauge Figure 4 1 Two Inch Gauge Removal and Reinstallation Note If installing an additional pressure gauge ensure that the correct Vacuum or Pressure Transducer Modules are installed on the Interface Module and that the Interface Module has been programmed to recognize the new gauge Disassembling a Two Inch Gauge 1 With your hand turn the bezel counter clockwise about turn and remove the bezel glass gasket and mask ring This requires a fair amount of initial force Gently slide the gauge out of its housing Gently pull the scaleplate programming tab out from under the connector on the printed circuit board Remove the scaleplate by allowing the gauge pointer to pass through the cut on the scaleplate Service Procedures AMETEK DIXSON 4 3 3 Reassembling a Two Inch Gauge 1 Attach the scaleplate to the gauge as shown in Figure 4 2 2 Referring to Figure 4 3 insert the gauge body into the housing Ensure the connector extends through the rear of the housing The three round notches around the edge of the printed circuit board fit over the round guides on the inside of the housing The gauge is correctly inserted when the two round notches in the front of the gauge fit over the two round guides on the inside of the housing and the connector extends slightly out the re
27. auge is present on the private data bus remove the gauge and verify that the gauge scaleplate is correctly installed if the scaleplate is correctly installed replace the defective gauge If data for that gauge is not present on the private data bus discon nect the HDT from the 2 inch gauge and connect it to the diagnostic connector to see ifthe Engine ECU is placing data for the gauge on the J1708 data bus If data for that gauge is present on the J1708 data bus replace the In terface Module If data for that gauge is not present on the J1708 data bus check the Engine ECU according to the manufacturer s diagnostic procedures A Non J1708 Data Bus Gauge Pointer Sweeps Probable Cause Interface Module incorrectly programmed Procedure 1 Start the vehicle s engine and use the Select button to scroll through the SMC messages If DIAG appears the Interface Module is defective and must be re placed If not go to the next step Connect the HDT to the rear of any 2 inch gauge Usually the last gauge in the series has an unused connector Use the HDT to verify data for the suspect gauge is present on the private data bus a If data for that gauge is present on the private data bus remove the gauge and verify that the gauge scaleplate is correctly installed if the scaleplate is correctly installed replace the defective gauge If the gauge is not a pressure gauge and no data for it is present on the private data bus replace
28. cable assemblies make up the private data bus that connects the tachometer and 2 inch gauges These cable assemblies carry power ground backlight power and private data bus signals from one gauge to the next Their 5 pin plugs are polarized and cannot be plugged in backwards Identical pinouts allow ei ther end to be plugged into either of two identical sockets on the back of the gauges The plugs are held in place by a locking tab Depressing the locking tab lets you re move the connector from the gauge Two Inch Gauges Each 2 inch gauge consists of a printed circuit board and meter assembly and a scaleplate with programming tab These parts are mounted together with a glass face plate and a sealing ring in a plastic twist apart housing Figure 4 3 on page 4 5 shows how these parts are assembled The printed circuit board has a red warning LED two LEDs for backlighting a micro processor that converts messages from the private data bus into LED and pointer in formation a pair of private data bus connectors and small 5 pin contact assembly that accepts the programming tab on the scaleplate The scaleplate s programming tab automatically configures a gauge to the function shown on the scaleplate Holes in the tab perform the actual programming by allow ing certain contact pins to make contact with the circuit board A microprocessor on each gauge circuit board converts the private data bus messages into meter drive sig nals Figure 4
29. cedures in Chapter 5 To select another gauge press the Return key to exit this display and return to the gauge list then repeat this procedure from Step 5 When finished disconnect the HDT 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON 6 5 Viewing Configuration Data The HDT can be used to see what conditions turn on the warning lights in non J1708 gauges The information in this section is presented as additional information not necessary to the operation of the HDT or to the servicing of the vehicle Procedure 1 With the ignition off connect the HDT to the vehicle s diagnostic connector using the appropriate adapter as shown in Figure 6 2 The diagnostic connec tor is usually located under the dash on the driver s side Turn the ignition on The HDT will look for the Interface Module and try to establish communications with it while displaying DATA LINK establishes communications with the vehicle system Typically this takes less than 30 seconds but can take up to 2 minutes a If communications are established the HDT will display INTERLINK MODULE Indicates the software version DETECTED of the Interface Module Your SOFTWARE VERSION version number may be v1 0 different If communications are not established after 2 minutes repeat this procedure starting at Step 1 with the ignition off If the HDT fails to establish communications after three attempts t
30. e Load Gauge Air Pressure Main Transmission Oil Temp Manifold Boost Pusher Suspension Air Pressure Pyrometer Tractor Brake Applic Air Pressure Rear Drive Axle Oil Temp Tag Suspension Air Pressure Trailer Brake Applic Air Pressure Voltmeter Engine Coolant Temp 6X6 Front Drive Axle Oil Temp Air Deflector Position Transfer Case Oil Temp Clogged Too low Too low No indication Incorrect discharge rate Too high No indication Too high Too high No indication Too low Too high Too high Clogged Low fuel No indication No indication Too high No indication No indication Too high No indication Too high No indication No indication Too low or too high Too high Too high No indication Too high More than 25 of water H2O Less than 66 psi Less than 66 psi Not activated gt 25 amps when RPM lt 1200 or gt 2 amps when RPM gt 1200 Higher than 230 F Not activated Higher than 230 F Higher than 230 F Not activated Engine ECU Engine ECU Higher than 230 F More than 7 of mercury tank or less Not activated Not activated Programmable Not activated Not activated Higher than 1200 F Not activated Higher than 230 F Not activated Not activated gt 15 volts or lt 10 volts Engine ECU Higher than 230 F Not activated Higher than 230 F Table 2 1 Red Warning LEDs Operation AMETEK DIXSON Condition Associated Gauge LED Coolant tem
31. ed related information over a pub lic data bus the SAE J1708 data bus For information about the vehicle s Electronic Con trol Unit s wiring diagrams the SAE J1708 data bus external sensors and other components that are not part of the instrumentation please refer to the appropriate vehicle service documentation 1 2 How To Use This Manual The manual is divided into six chapters Introduction Contains a brief introduction to the product and to the man ual itself Operation A complete operator s manual Written for the vehicle opera tor this chapter describes how to use the instrumentation and how to in terpret the information it presents If you are going to operate the vehicle you should read and understand the information in this chapter Functional Description Describes the components that make up the in strumentation and how they communicate with other systems in the vehi cle An understanding of the information in this chapter will help you diagnose and find problems in the instrumentation If you are going to ser vice the instrumentation you should read and understand the information in this chapter Service Describes how to remove disassemble and reinstall the compo nents of the instrumentation It contains a spare parts list and other impor tant information Do not service the instrumentation until you have read and understand the information in this chapter Troubleshooting Provides detailed
32. el To reinstall place the instrument through the front of the panel and line up the alignment tab at the bottom with the cutout notch in the mounting hole Attach the U bracket to the instrument and secure with the nuts and lock washers 6 Reattach the connectors 4 3 Servicing the Two Inch Gauges 4 3 1 Removal and Reinstallation Follow the instructions in Figure 4 1 to remove and reinstall the 2 inch gauges Service Procedures 072 40245 D 072 40245 D Model 387 Instrument System Service Manual Removing a Two Inch Gauge A Unplug the 5 wire connectors from the rear ofthe gauge by depressing their tabs while pulling the connector straight out B Twist the clamp ring in the direction shown about 1 8 turn C Pull the clamp ring straight off the rear of the gauge housing D Remove the gauge from the front of the panel Installing a Two Inch Gauge A Insert the rear of the assembled gauge into the panel from the front B Slide the clamp ring onto the rear of the gauge and twist the ring until the two notches in the ring align with the two tabs on the outside of the gauge housing Once the notches are aligned with the tabs continue to NIK Notches slide the clamp ring up against the rear of the panel Twist the clamp ring 1 8 turn in the direction shown until it clicks into its locked position Note The clamp ring has two built in stop points to ensure a tight fit without damage These stops
33. ferent 2 Operation 2 1 Activating the Instrumentation 2 2 Select Reset Switch o a 2 3 Speedometer with Integral Message Center 2 4 Using the Speedometer Message Center 2 4 1 Clock Operation 2 4 2 Trip Odometer Operation 2 4 3 Clock Alarm Operations 2 5 Warning Alarms i 2 5 1 Red Warning LEDs 2 5 2 Vehicle Safety Warning Messages 2 5 3 System Fault Messages 3 Functional Description 3 1 The Interface Module i 3 1 1 Pressure and Vacuum Inputs 3 1 2 Transducer Modules 3 1 2 1 Pressure Transducer Module 3 1 2 2 Vacuum Transducer Module VTM 3 1 3 Vacuum Pressure and Pressure Vacuum Transducer Modules J1708 Data Bus Electronic Control Units Speedometer with Integrated Message Center 3 4 1 Select and Reset Switches 3 4 2 Power Take Off PTO Input 3 4 3 Two Speed Axle Input Diagnostic Capabilities 3 5 1 Power On Initialization 3 5 2 Diagnostic Connector Private Data Bus re 3 6 1 Five Wire Cable Assemblies 3 6 2 Two Inch Gauges 3 6 3 J1708 Data Bus and Private Bus Driven Gauges 072 40245 D AMETEK DIXSON 3 6 4 Tachometer 3 6 4 1 Ammeter 3 6 4 2 Voltmeter 3 6 4 3 Pyrometer 3 6 4 4 Transmission and Axle Temperature Gauges 3 6 4 5 Fuel Level 3 7 Backlighting 4 Service Procedures 4 1 Some Important Dos and Don ts 5 4 2 Replacing the Speedometer and Tachometer 4 3 Servicing the Two Inch Gauges 4 3 1 Removal and Reinstallation 4 3 2 Disassembling a Two Inch Gauge 4 3 3 Reassembling a Two
34. gine Oil Temperature Temperature Sensors Input Engine Coolant Temperature Tach Input Speedo Input Manifold Boost Engine Load Figure 3 1 Instrumentation Block Diagram Caution Never store gauges face down The gauge meter movements use an oil damping suspension If a gauge is left face down longer than 15 minutes the oil may begin to run out This causes inaccurate gauge readings premature gauge failure and voids the warranty 072 40245 D Functional Description AMETEK DIXSON 3 1 The Interface Module The Interface Module controls the instrumentation by collecting information from various sources and converting that information into gauge pointer infor mation which it then sends to the gauges It is an environmentally sealed unit and it is usually mounted beneath the cab and against the frame rail It is con nected to the J1708 data bus and to switches sensors and pressure vacuum hoses throughout the vehicle Input Connectors J1708 data bus Private data bus Transducer Module Air Filter Restriction input Fuel Filter Restriction input Additional pressure inputs Pressure Transducer Module Air Tank 1 input Air Tank 2 input Figure 3 2 387 System Interface Module Functional Description All gauge and display information is gathered by the Interface Module except Road Speed and Engine Hours Road Speed and Engine Hours messages are sent directly to the SMC over the J1708 data bus The S
35. gure 5 17 and have not found the problem one of the 2 inch gauges could be at fault To find out which one a Disconnect the last gauge in the 5 wire cable daisy chain it will have an unused connector Switch the ignition on and see if the gauges still continue to sweep after the initialization If not the disconnected gauge is defective Replace it If the gauges continue to sweep switch the ignition off disconnect the next to the last gauge in the daisy chain switch the ignition back on and observe the pointers Repeat this process until all gauges except the SMC have been un plugged If the problem goes away after unplugging a particular gauge then that gauge is defective and must be replaced If the problem persists after unplugging all the gauges replace the Interface Module 072 40245 D Troubleshooting Procedures AMETEK DIXSON Checking power to the Interface Module or A Ignition Switch Ignition Switch A Turn the ignition off B Turn ignition on and measure and unplug 10 pin the voltage between harness connector J3 from connector J3 pin A Ignition Interface Module and pin K ground Reading is zero Trace the battery voltage and ground back through the wiring harness to their sources looking for open wires loose connections blown fuses etc Reading is battery voltage Check the Private Data Bus wires for continuity Figure 5 16 Checking Power to the Interface Module Testing
36. he name of the gauge you chose MODIFY CONFIG ae depending upon the gauge TRAC BRAK APPLD PSI name you select MAIN TRANS TEMP XXX 00 temperature value in F 8 To keep the changes you have made and store the new configuration data a Press the Return key to return to the MAIN MENU The HDT will dis play Used to see Main Transmission Temperature programming MAIN MENU PVIEW CONFIG MODIFY CONFIG Used to change the configuration WRITE CONFIG Used to accept the changes and send them to the Interface Module b Move the pointer to WRITE CONFIG and press the Select key The HDT will display SENDING THE Displayed while the HDT CONFIGURATION sends the updated data to BLOCK xxx yyy the Interface Module Using the Handheld Diagnostic Tool 072 40245 D 072 40245 D Model 387 Instrument System Service Manual The HDT will display the MAIN MENU if the programming was suc cessful You can then program another gauge or use the Return key to go back to previous menus When finished unplug the tool If the HDT displays SYSTEM ERROR turn the ignition off and back on then repeat this procedure from the beginning 6 7 Programming the Main Transmission Temperature Warning LED This section describes how to program the correct turn on temperature of the Main Transmission Temperature gauge warning LED This procedure is only required when the Interface Module has been replaced o
37. here may be a prob lem with the J1708 data bus In this case choose the symptom from Chapter 5 that best describes the original instrument system failure and follow the troubleshooting procedures 3 After communications are established read the configuration data by press ing the Select key The HDT will display Displayed while the HDT ga READING THE thers data from the vehicle s CONFIGURATION system xxx and yyy block BLOCK xxx yyy numbers a Ifthe HDT reads the configuration data successfully it will display Using the Handheld Diagnostic Tool 072 40245 D Model 387 Instrument System Service Manual ACCESS LEVEL Normal is the tool s normal PNORMAL operating mode Factory is for FACTORY factory use only and requires a password b If the HDT cannot read the configuration data it will tell you so First repeat this procedure from Step 1 with the ignition off If still unsuccessful one at a time disconnect other devices that use the J1708 data bus and repeat this procedure each time to isolate the faulty component 4 Press the Select key when the pointer is at NORMAL The HDT will display INTERLINK MINILINK PREAD PUBLIC BUS CONFIGURE 5 Move the pointer to CONFIGURE and press the Select key The HDT will dis play Used to see Main Transmission Temperature programming MAIN MENU VIEW CONFIG MODIFY CONFIG Used to change the configuration WRITE
38. ished unplug the tool If instead the HDT displays SYSTEM ERROR turn the ignition off and back on then repeat this procedure from the beginning When finished disconnect the HDT from the vehicle To verify you set the correct value go to Section 6 5 on page 8 072 40245 D Using the Handheld Diagnostic Tool AMETEK DIXSON Using the Handheld Diagnostic Tool 072 40245 D Model 387 Instrument System Service Manual 6 8 HDT Spare Parts Part Name Part Number Hand held Diagnostic Tool complete kit 000 49856 Handheld Diagnostic Tool 220 12237 Carrying Case 240 12309 Diagnostic Cable with 6 Pin Connector 220 12234 Diagnostic Cable with 9 Pin Connector 220 12233 Private Bus Adapter 240 11204 Reprogramming Cable Adapter 220 12235 Table 6 1 HDT Spare Parts END OF DOCUMENT 072 40245 D Using the Handheld Diagnostic Tool
39. ive electronic damage may result if the wiring is left connected The warning lights and the backlighting in the gauges are LEDs If a gauge LED is defective replace the entire gauge Store or hold gauges in their normal op erating position or face up to prevent the gauge dampening fluid from leaking out Apply pressure or vacuum slowly to transducer modules Do not splice into the data bus at any time Incorrect data and false readings can result Do not open or attempt to service the speedometer tachometer or Interface Module or the warranty will be voided Do not store or otherwise leave any gauge face down longer than 15 min utes Do not apply pressure to transducer modules at a rate that exceeds 150 PSI per second Replacing the Speedometer and Tachometer Note The SMC calculates and stores odometer and trip odometer data If the SMC is replaced with one from another vehicle the odometer will reflect the other vehicle s accumulated mileage If a factory new speedometer is installed the odometer will read zero Service Procedures AMETEK DIXSON The SMC and tachometer are mounted using standard U brackets To replace the SMC or tachometer 1 Unplug the connectors from the rear of the gauge by depressing their tabs while pulling the connector straight out Remove the two nuts and lock washers holding the U bracket and remove the U bracket Remove the instrument from the front of the pan
40. lar device is connected re place that device lt lt Ignition Switch A Turn the ignition off B Unplug 10 pin connector J3 from the Interface Module and place a jumper between harness connector J3 pins E and F Public Bus and Note May not look i 0 to 10 Engine ECU like actual connector ohms Connector ea to wire C Unplug the Engine ECU and meas 417 ure the resistance between circuits 417 and 418 J1708 data bus wires to wire 418 More than 10 ohms measured Trace circuit wires 417 and 418 back to harness connector J3 looking for damaged wires and missing or broken connector pins Less than 10 ohms measured Another device using the J1708 data bus SMC Interface Mo dule ABS Transmission or HVAC ECU satellite communications devices etc could be defective and interfering with bus communications Figure 5 14 SMC Pointer and All J1708 Data Bus Gauge Pointers Sweep 072 40245 D Troubleshooting Procedures AMETEK DIXSON All J1708 Data Bus Gauge Pointers Except the SMC Pointer Sweep Probable Cause J1708 data bus is open between the Engine ECU and the Interface Module Procedure Follow the steps in Figure 5 15 E Ignition Switch A Turn the ignition off B Unplug 10 pin connector J3 from the Interface Module Place a jumper between harness connector J3 pins E and F Public Bus and Note May not look like actual connector Engine E
41. ll through the different functions If a warning alarm is triggered a warning message will override all other displays un til the condition that caused the warning alarm is corrected Some warning alarms in clude an audible warning Warning alarms are described in detail in Section 2 5 2 4 Using the Speedometer Message Center 2 4 1 Clock Operation To display the clock time press and release the Select switch until the clock is displayed To change the clock time 1 Press and release the Reset switch The Hours display will flash indicating the value can be changed Press the Select switch to change the Hours value or press the Reset switch to accept the displayed value and enable the Minutes value to be changed To change from AM to PM scroll through 12 hours When the Minutes value is flashing press the Select switch to change the value or press the Reset switch to accept the displayed value and exit the Change Time function Scrolling the Minutes value past 59 will not change the Hours value 072 40245 D Model 387 Instrument System Service Manual Trip Odometer Operation To display the Trip 1 or 2 Odometer press and release the Select switch until XXXXT1 or XXXXT2 is displayed XXXX the actual mileage reading To reset a trip odometer to zero 1 Display the odometer to be reset Trip 1 or Trip 2 2 Press and hold the Reset switch for 3 seconds Clock Alarm Operations To display the alar
42. m time press and release the Select switch until an AL ap pears along with a time value To change the alarm time 1 Press and release the Reset switch The Hours digits will begin to flash indi cating the values can be changed Press the Select switch to change the Hours value or press the Reset switch to accept the displayed value and enable the Minutes value to be changed To change from AM to PM scroll through 12 hours When the Minutes value is flashing press the Select switch to change the value Scrolling the Minutes value past 59 will not change the Hours value Press the Reset switch to accept the displayed value and exit the Change Alarm Time function This also activates the alarm and an asterisk will appear in the first digit of the Clock display to indicate the alarm is on To activate or deactivate the alarm tone from any display press and hold the Se lect switch longer than three seconds To silence the alarm tone while it is sounding press and release the Select switch while the alarm is sounding 2 5 Warning Alarms A warning alarm indicates that some condition in the vehicle requires attention A warning alarm can be indicated in the following ways Red warning LEDs in the 2 inch gauges Vehicle safety warning messages in the SMC e System fault warning messages in the SMC A warning alarm will continue until the condition that caused it is corrected At that time the SMC will display a Reset me
43. nstrumentation Harness Layout Gauge Connector Wiring 072 40245 D Figure 5 23 Figure 6 1 Figure 6 2 Figure 6 3 List of Tables 072 40245 D Table 2 1 Table 2 2 Table 4 1 Table 5 1 Table 5 2 Table 5 3 Table 5 4 Table 5 5 Table 5 6 Table 5 7 Table 6 1 Model 387 Instrument System Service Manual Instrumentation Connector Pinout Diagram Hand Held Diagnostic Tool N A Connecting the HDT to the Diagnostic Connector Connecting the HDT to the Private Bus Red Warning LEDs Vehicle Safety Warning Messages 387 System Spare Parts Troubleshooting Starting Point Two Inch Gauge Problems Problems Indicated by Flashing Gauge LEDs i SMC Problems Problems Indicated by espina Pointerfe Warning Messages System Fault Messages HDT Spare Parts AMETEK DIXSON Notes 072 40245 D Model 387 Instrument System Service Manual Introduction 1 1 Purpose and Scope The purpose of this manual is to provide Peterbilt with the knowledge required to produce their own repair procedures This manual contains the technical repair informa tion necessary to diagnose and repair the Model 387 Instrument System also referred to as simply the instrumentation The information in this manual is not proprietary and can be used as Peterbilt sees fit The manual describes how to operate service and troubleshoot the instrumentation installed in vehicles that broadcast engine and spe
44. ointer sweeps back and forth in a windshield wiper mo tion and stops at a 10 00 position with its red LED on A2 inch gauge pointer stays at a 7 00 position and its red LED flashes A 2 inch gauge pointer goes to and remains at a 12 00 position with its red LED on 2 2 Select Reset Switch A Select Reset switch on the dash allows you to select set and reset message center displays It also allows you to scroll through active system warning messages 2 3 Speedometer with Integral Message Center The speedometer and its message center together are called the SMC The SMC nor mally displays road speed and the odometer reading The SMC can also display other functions as shown in Figure 2 2 072 40245 D Operation AMETEK DIXSON Operation To view a different function press and release the Select switch until the desired func tion appears 98 165 3 geie Odometer Trip Odometer 2 not resettable resettable Asterisk indicates the EJHA OSAR alarm is set Clock Hamster not resettable 1234 51 Ale SP Trip Odometer 1 Alarm Time resettable Figure 2 2 Speedometer Message Center Displays LO WATER Diagnostic Message SWVERKX Software Version Only visible upon System Initialization The message center goes into a sleep mode i e goes blank when the ignition is turned off Each time you press the Select switch the message center is awakened for 10 seconds This allows you to scro
45. on page 5 27 Go to Section 5 5 2 on page 5 27 Go to Section 5 5 3 on page 5 28 Go to Section 5 5 4 on page 5 28 Go to Section 5 5 5 on page 5 30 Go to Section 5 5 6 on page 5 31 Go to Section 5 5 7 on page 5 33 Go to Section 5 5 8 gauges transducer modules Notes J1708 data bus gauges are gauges whose data is sent from the Engine ECU to the Interface Module over the J1708 data bus The SMC Tachometer Engine Oil Temperature Engine Oil Pres sure Engine Coolant Temperature Manifold Boost and Engine Load gauges are all J1708 data bus Data for the remaining gauges is sent directly to the Interface Module through connectors J3 and J4 various temperature inputs fuel level etc or through direct connections to the pressure and vacuum Table 5 5 Problems Indicated by Sweeping Pointer s Troubleshooting Procedures 072 40245 C Model 387 Instrument System Service Manual A J1708 Data Bus Gauge Pointer Sweeps Probable Cause No data from Engine ECU Procedure 1 Start the vehicle s engine and use the Select button to scroll through the SMC messages If DIAG appears the Interface Module is defective and must be re placed If not go to the next step Connect the HDT to the rear of any 2 inch gauge Usually the last gauge in the series has an unused connector Use the HDT to verify data for the suspect gauge is present on the private data bus a If data for that g
46. ote PP Pressure Pressure PV Pressure Fuel Restriction VP Air Restriction Pressure VV Air Restriction Fuel Restriction CC Cover Plate 387 System Spare Parts Service Procedures Service Procedures 072 40245 D AMETEK DIXSON 5 5 One or More Gauge Pointers Sweep Run the initialization again and observe all gauge pointers Then find the symp tom in Table 5 5 that best describes what you see and follow the instructions Symptom Probable Cause Action A J1708 data bus gauge pointer sweeps A non J1708 data bus gauge pointer sweeps The SMC and all J1708 data bus gauge pointers sweep SMC displays NO DATA may take a couple of minutes to appear All J1708 data bus gauge pointers except the SMC pointer sweep All gauge pointers except the SMC pointer sweep Only the SMC pointer sweeps and no messages appear SMC pointer sweeps SMC displays NO DATA may take a couple of minutes to appear Several but not all gauge pointers sweep No data from Engine ECU Interface Module incor rectly programmed Private data bus wires open between the gauges Defective part on J1708 data bus J1708 data bus open be tween Engine ECU and Interface Module Private data bus open defective component on private data bus No speed data from Engine ECU J1708 data bus open be tween Engine ECU and SMC Go to Section 5 5 1
47. perature high Water Temperature H2OT OK Air tank 1 pressure low Primary Air Pressure AIR1 OK Air tank 2 pressure low Secondary Air Pressure AIR2 OK Engine oil pressure low Engine Oil Pressure OIL OK Engine oil temperature high Engine Oil Temperature OILT OK Main transmission oil Main Transmission Oil Tem TRAN OK temperature high perature CAUTION If a message that is not listed in this table appears do not ignore it The vehicle should be serviced regardless of the message that appears Table 2 2 Vehicle Safety Warning Messages Operation 072 40245 D Model 387 Instrument System Service Manual 3 Functional Description This section describes the instrumentation on a functional level It is not necessary to read this section to troubleshoot and service the system It is intended to provide a more detailed understanding of how the system works Figure 3 1 illustrates the ma jor components and signal flow Note Throughout this manual the terms public data bus or public bus refer specifically to the J1708 data bus Tachometer 2 Inch Gauges Speedometer PTO and 2 Speed Message ae Axle Inputs Remote buttons for Select Input Reset Input Diagnostic Connector Vac PSI Module amp Additional Pressure and Vacuum Inputs Resistive Voltage and Sensor Inputs Ammeter Air Tank 1 Voltmeter Engine Sensors Air Tank 2 Pyrometer Brake Engine Oil Pressure Fuel Level System En
48. process takes less than 30 seconds Using the Handheld Diagnostic Tool 072 40245 D Model 387 Instrument System Service Manual If communications are established the HDT will display PRIVATE BUS SELECT GAUGE BY gt NUMBER NAME If communications are not established after 15 seconds repeat this step If still unsuccessful there may be a problem with the private data bus Choose the symptom from Chapter 5 that best describes the original instrument system failure and follow the troubleshooting procedures Move the pointer to NAME and press the Select key The HDT will display GAUGE BY NAME gt lt gauge name gt Y More items available gauge name gt Press the Down key to see To see the names of the private data bus gauges the for which the Interface Module has been programmed use the Up and Down keys to scroll through the list To see the data the Interface Module is sending to a particular gauge move the pointer to that gauge s name and then press the Select key After a few seconds the HDT will display the name of the gauge and the value being sent to it PRIVATE BUS lt gauge name gt xxx data value VALUE EXXX yyy ON means gauge LED should LED DATA yyy be on OFF means LED should be off VALUE and LED data should appear within 15 seconds If not the Interface Mod ule is not broadcasting data for the selected gauge If this is the case follow the troubleshooting pro
49. r a different type of transmission has been installed in the vehicle The temperature at which the warning LED lights depends upon the type of trans mission that is installed in the vehicle Installed Transmission Temperature Allison without retarder 285 F Allison with retarder 300 F ZF transmission 285 F Manual transmission 275 F Procedure 1 With the ignition off connect the HDT to the diagnostic connector 6 or 9 pin on the vehicle using the appropriate adapter See Figure 6 2 The diag nostic connector is usually located under the dash on the driver s side Turn the ignition on The HDT will look for the Interface Module and try to establish communications with it while displaying ESTABLISHING DATA LINK Displayed while the HDT establishes communications with the vehicle system Typically this takes less than 30 seconds but can take up to 2 minutes a Ifcommunications are established the HDT will display INTERLINK MODULE DETECTED SOFTWARE VERSION WE 11500 Indicates the software version of the Interface Module Your version number may be different Using the Handheld Diagnostic Tool AMETEK DIXSON If communications are not established after 2 minutes repeat this procedure starting at Step 1 with the ignition off If the HDT fails to establish communications after three attempts a problem may e
50. riginates at a sensor mounted on the engine The Engine ECU receives the data converts itinto rpm data and sends it over the J1708 data bus The Interface Module reads the rpm data on the J1708 data bus and converts itinto tacho meter data which it places on the private data bus The tachometer receives the data and converts itinto pointer drive signals Connections are shown in Figure 3 7 072 40245 D Model 387 Instrument System Service Manual 3 6 4 1 Ammeter The signal for the ammeter begins at a sense wire coiled up in the battery box be tween the battery s positive terminal and the megafuse leading to the alternator As current from the vehicle s charging system flows through the sense wire a voltage of a few millivolts is generated This voltage is applied to the Interface Module which converts it into ammeter messages on the private data bus If the system is charging the positive voltage at the sense wire causes the ammeter to read in the positive area If the system is discharging the sense wire voltage goes negative and causes the ammeter to read in the negative area See Figure 3 8 for the actual wire connections Private Bus Wire 636 to pin G Megafuse Private Bus nn Wire 637 Ammeter Wire 337 to pin D Ammeter Wire 338 to pin C Figure 3 8 Ammeter Circuit 072 40245 D Functional Description AMETEK
51. robable Cause The J1708 data bus from the Engine ECU to the Interface Module and the SMC is open broken wire or connector pin defective Interface Module de fective SMC defective Engine ECU or other device connected to the J1708 data bus Procedure see Figure 5 14 on page 5 29 1 Perform the checks in Figure 5 14 on page 5 29 If the reading is less than about 10 ohms another device using the J1708 data bus SMC Interface Mod ule ABS Transmission or HVAC ECU satellite communications devices etc could be defective and interfering with bus communications Continue with the next step To find which device may be interfering with data bus communications switch the ignition off and disconnect the devices from the J1708 data bus as follows a Locate the splice block behind the glove box and unplug all devices at the splice block except the Engine ECU b Disconnect the Interface Module by unplugging 10 pin connector J3 at the module 072 40245 D Model 387 Instrument System Service Manual c Disconnect the SMC by unplugging the six pin connector from the rear of the SMC 3 After disconnecting all devices except the Engine ECU use the engine manu facturer s diagnostic procedures to verify the Engine ECU is working prop erly If the Engine ECU is good reconnect each device one at a time verifying the Engine ECU is still working after each device is connected If the Engine ECU quits working after a particu
52. s Figure 3 3 Pressure Circuit Transducer Modules Four different transducer modules are available All modules consist of pressure or vacuum transducers or both mounted in a common thermoplastic base inside a metal housing Each transducer converts pressure or vacuum into a DC voltage that can be used by the Interface Module Transducer modules cannot be replaced in the field 3 1 2 1 Pressure Transducer Module A pressure transducer module PIM contains two identical pressure transducers each capable of handling up to 150 psi It can be connected to air fuel or oil pressure inputs It is mounted at port 1A 1B and connected to Air Tank 1 and Air Tank 2 air pressure A second PTM may also be mounted at port 5A 5B and connect to addi tional pressure sources See Figure 3 4 on page 3 4 072 40245 D Functional Description AMETEK DIXSON 5A 5B PSI PSI AIR FUEL eO 0e eO 06e Pressure Transducer Vacuum Transducer Module Module 5A 5B PSI FUEL 0 06 Vacuum Pressure Pressure Vacuum Transducer Module Transducer Module Air Filter Restriction Fuel Filter Restriction Figure 3 4 Pressure Vacuum and Pressure Vacuum Transducer Modules 3 1 2 2 Vacuum Transducer Module VTM A vacuum transducer module VTM contains two vacuum transducers The VIM is used for the Air Filter Restriction and Fuel Filter Restriction gauges The VTM must be mounted at port 5A 5B only
53. secure it using the two fasteners Do not tighten the mounting fasteners more than 32 inch pounds Reconnect J3 and JA Reconnect the air vent hose and the vacuum pressure hoses to the Interface Module as specified by the vehicle manufacturer Reprogramming the Interface Module The Interface Module must be told which pressure gauges are present at ports 5A and 5B and what kind of transmission is installed in the vehicle This is done using the HDT as described in Chapter 6 In addition the Interface Module must be repro grammed whenever it is replaced 072 40245 D 072 40245 D 4 6 Spare Parts Listing Model 387 Instrument System Service Manual Part Number Description 17 05068 001 Interface Module PPPP with modules 17 05068 002 Interface Module PPVV with modules 17 05068 003 Interface Module PPVP with modules 17 05068 004 Interface Module PPPV with modules 17 05068 005 Interface Module PPCC with one pressure module 17 05066 001 SMC MPH kph black bezel 17 05066 002 SMC MPH kph satin bezel 17 05066 003 SMC KPH mph black bezel 17 05066 004 SMC KPH mph satin bezel 17 05067 007 Tachometer black bezel 17 05067 002 Tachometer satin bezel 00049861 2 inch general gauge black bezel 00049862 2 inch general gauge satin bezel Call factory for part number 2 inch gauge scaleplates N
54. ss the message and si lence the buzzer If an active alarm still exists the message and buzzer will re turn Press the Reset switch for 1 second then press the Select switch to display any other function The warning message will disappear for 60 seconds It willthen reappear and remain until the condition causing it is corrected The audible alarm will continue to sound System Fault Messages A system fault message indicates a problem exists with the Model 387 Instrument Sys tem that does not directly affect vehicle safety These occur when the ignition is first switched on The messages are IM CAL IM CFG IM DIAG IM LIN IM SLFT ODO ERR NO DATA SMC MEM System fault messages are detected by the Interface Module or the SMC No gauge LED is associated with them no audible warning will sound and no Reset message will appear The NO DATA message can occur any time not just during System Initialization Operation 072 40245 D 072 40245 D Model 387 Instrument System Service Manual Gauge Indication When LedIs On Activating Condition Air Cleaner Restriction Air Tank 1 Air Tank 2 Air Starter Air Pressure Ammeter Auxiliary Transmission Oil Temp Brake Saver Application Air Pressure Brake Saver Oil Temp Center Drive Axle Oil Temp Engine Load Engine Oil Pressure Engine Oil Temperature Front Drive Axle Oil Temp Fuel Filter Restriction Fuel Level left right or main tank Fuel Pressur
55. ssage for 10 seconds and the warning indica tions will cease Pressing the Reset switch clears the Reset message sooner Red Warning LEDs Table 2 1 on page 2 5 lists the conditions which light the red warning LEDs Some of the LEDs light when the Interface Module receives the appropriate message 072 40245 D Operation AMETEK DIXSON over the J1708 data bus Other LEDs light as determined by Interface Module pro gramming and some warning LEDs are not used Column 3 lists the condition that causes the warning LED to light You cannot dismiss or override red warning LED indications A red warning LED willremain on until the condition causing it is corrected Note Not all gauges listed are currently available Vehicle Safety Warning Messages Messages advising of unsafe operating conditions can appear in the SMC Exam ples are a major engine or transmission problem low oil pressure high tempera ture low coolant level and a problem with the brake safety low air pressure An audible alarm will accompany these warning messages Vehicle safety warning messages are listed in Table 2 2 on page 2 6 Column 1 shows the warning message as it appears in the SMC and column 2 identifies its meaning Column 3 identifies the gauge whose red warning LED lights Column 4 shows the associated Reset message You can temporarily override vehicle safety warning messages two ways 1 Press the Reset switch for 3 seconds This will dismi
56. t established after 2 minutes and repeat this procedure starting at Step 1 with the ignition off If the HDT fails to establish communications after three attempts there may be a problem with the J1708 data bus In this case pick the symptom from Chapter 5 that best describes the original failure in the instrument sys tem and follow the troubleshooting procedures 3 After communications are established continue this procedure by pressing the Select key While the HDT reads the configuration data it will display Displayed while the HDT ga READING THE thers data from the vehicle s CONFIGURATION system xxx and yyy block BLOCK xxx yyy numbers a Ifthe HDT reads the configuration data successfully it will display ACCESS LEVEL Normal is the tool s normal gt NORMAL operating mode Factory is for FACTORY factory use only and requires a password If the HDT cannot read the configuration data it will display COULD NOT READ THE CONFIGURATION In this case first re peat this procedure from Step 1 with the ignition off If still unsuc cessful one at a time disconnect other devices that use the J1708 data bus and repeat this procedure each time to isolate the faulty compo nent 4 Use the Up and Down keys to move the pointer to NORMAL then press the Select key The HDT will display INTERLINK MINILINK PREAD PUBLIC BUS CONFIGURE Using the Handheld Diagnostic Tool 072 40245 D
57. terface Module sense the temperature of the gear oil Each sender contains a thermistor whose value decreases as the temperature increases The Inter face Module converts the thermistor resistance and into data that it places on the pri vate data bus Connections are shown in Figure 3 11 Private Bus Wire 636 to pin G Signal Wire see table below Ground Wire 239 to pin K Temperature Sender Private Bus mmm Wire 637 a gt gt to pin D Sender Wire J3 Pin Front or Center Axle 35 Rear Axle 36 Main Transmission 59 Aux Transmission 60 Temperature Figure 3 11 Axle and Transmission Temperature Circuits Functional Description 072 40245 D Model 387 Instrument System Service Manual 3 6 4 5 Fuel Level The signal for the fuel level comes from a sender unit that is mounted inside the fuel tank and connected to the Interface Module The sender unit contains a float device attached to a variable resistor As the fuel level drops the float drops and the resis tance of the variable resistor increases The Interface Module converts the resistance into data that it places on the private data bus Connections are shown in Figure 3 12 Private Bus Sender Wire J4 Pin Wire 636 to pin G Main Fuel Tank 1 A Left Fuel Tank 1 A Right Fuel Tank 2 B Ground wire to J3 pin K FUEL TA
58. the Tab correctly inserted the metal fingers fingers and circuit board on top of the tab Figure 4 2 Scaleplate Alignment _ Scaleplate Programming tab Printed Round amp Mask ring circuit Guide Sealing gasket Glass faceplate Bezel Hole finger Warning notches LED Gauge body Turn this way to remove bezel Figure 4 3 Two Inch Gauge Disassembly 072 40245 D Service Procedures AMETEK DIXSON 4 4 Reprogramming a Two Inch Gauge Two inch gauges are identical in design and hardware with the exception of their scale plates This allows any 2 inch gauge to serve a variety of functions simply by changing its scaleplate To reprogram a 2 inch gauge to a different function simply attach the ap propriate scaleplate as shown in Figure 4 2 4 5 Servicing the Interface Module 4 5 1 Removing the Interface Module Unplug connectors J3 and J4 Remove the two fasteners and remove To remove the Interface Module follow the instructions in Figure 4 4 Fastener Disconnect the vent hose by pulling the hose away while pressing down on the colored ring Disconnect all vacuum and pressure lines from the transducer modules the Interface Module from the vehicle 0 33 x 1 8 NPT Figure 4 4 Removing the Interface Module Service Procedures Reinstalling the Interface Module 1 Position the Interface Module in its mounting location and
59. thout tools and they are maintenance free With the exception of the scaleplate all 2 inch gauges are identical Each scaleplate is coded and when installed in the gauge configures the gauge to the function shown on the scaleplate This reduces the spare parts inventory by requiring only a few blank gauges and a supply of inexpensive scaleplates rather than a complete spare gauge of each type The instrumentation can also display warning messages and audible alarms and has built in diagnostic capabilities to help diagnose problems Introduction 072 40245 D Model 387 Instrument System Service Manual 2 Operation 2 1 Activating the Instrumentation Turning on the ignition activates the instrumentation and starts the initialization de scribed in Figure 2 1 Two Inch Gauge Speedometer Initialization Initialization SUVERLO 200005 8 During initialization the 2 inch gauges During initialization the SMC displays its position their pointers to 12 00 and light software version number then positions its their LEDs Five seconds later the LEDs pointer to 12 00 for 2 seconds repositions it should go out and the pointers should to 0 and then displays the odometer indicate actual gauge readings Figure 2 1 System Initialization Service the vehicle if any of the following conditions occur after the initialization e The speedometer or tachometer pointer sweeps back and forth in a wind shield wiper motion A2 inch gauge p
60. tion When the ignition is first turned on the instrumentation performs an initialization to verify correct operation The initialization is described in Figure 3 6 Two Inch Gauge Speedometer Initialization Initialization SUVERLO During initialization the 2 inch gauges During initialization the SMC displays its position their pointers to 12 00 and light software version number then positions its their LEDs Five seconds later the LEDs pointer to 12 00 for 2 seconds repositions it should go out and the pointers should to 0 and then displays the odometer indicate actual gauge readings Figure 3 6 System Initialization Functional Description 072 40245 D Model 387 Instrument System Service Manual Diagnostic Connector The diagnostic connector allows test equipment such as the Handheld Diagnostic Tool described in Chapter 6 to be connected to the J1708 data bus The diagnostic con nector is usually located underneath the driver s side of the dashboard Note The diagnostic connector is not part of the instrumentation and is mentioned for reference only 3 6 Private Data Bus The private data bus connects the Interface Module to the tachometer and the 2 inch gauges It carries data from the Interface Module to the tachometer and 2 inch gauges The private data bus consists of a pair of wires in the 5 wire cable assemblies It is not connected to the J1708 data bus Five Wire Cable Assemblies Identically wired 5 wire
61. troubleshooting information that will help you identify faulty components within the instrumentation Using the Handheld Diagnostic Tool HDT Describes the operation of the handheld diagnostic tool used to help diagnose problems with the instrumentation 072 40245 D Introduction AMETEK DIXSON 1 3 System Components The instrumentation consists of a 3 inch speedometer with an integrated mes sage center a 3 inch tachometer several 2 inch gauges a Select Reset switch and a remotely mounted Interface Module Figure 1 1 shows how a typical system with four 2 inch gauges might look along with an Interface Module Figure 1 1 Panel and Interface Module 1 4 What Makes the Model 387 Instrument System Different In conventional instrumentation each electrical gauge is connected to a sensor by a signal wire and a return wire Additional wires for illumination power ground and warning lights could total as many as six wires per gauge Thus a panel with 10 gauges plus a speedometer and a tachometer could require up to 60 separate wires By comparison the Model 387 Instrument System uses a single 5 wire cable to con nect all the gauges This significantly reduces the number of wires behind the instru ment panel and makes the system much easier to troubleshoot and service The instrumentation is easy to repair The 2 inch gauges can be disconnected remov ed from the panel disassembled reassembled and reinstalled wi
62. xist with the J1708 data bus Pick a symptom from Chapter 5 that best describes the original failure in the instrument system and follow the troubleshooting procedures 4 After communications are established press the Select key The HDT will read the configuration data and display Displayed while the HDT ga READING THE thers data from the vehicle s CONFIGURATION system xxx and yyy block BLOCK xxx yyy numbers a Ifthe HDT reads the configuration data successfully it will display ACCESS LEVEL Normal is the tool s normal NORMAL operating mode Factory is for FACTORY factory use only and requires a password b Ifthe HDT cannot read the configuration data it will tell you so First repeat this procedure from Step 1 with the ignition off If still unsuccessful one at a time disconnect other devices that use the J1708 data bus repeating this procedure each time to isolate the faulty component 5 With the pointer at NORMAL press the Select key The HDT will display INTERLINK MINILINK PREAD PUBLIC BUS CONFIGURE 6 Move the pointer to CONFIGURE and press the Select key The HDT will display Used to see Main Transmission Temperature programming MAIN MENU VIEW CONFIG MODIFY CONFIG Used to change the configuration WRITE CONFIG Used to accept the changes and send them to the Interface Module Using the Handheld Diagnostic Tool 072 40245 D

Model 387 Instrument System Service Manual

Contents

Download Pdf Manuals

Related Search

Related Contents