Installation Instructions for: EMS P/N 30-6620
Contents
1. di zi hi ji E di E l L_I V 101 102 103 104 105 105 107 108 fife 3 4 5 6 P1 RP P3 P4P5 P6 27R82930 41 42 43 44 4514647484950 109 110 111 me 4113 114 115 116 77 11 12 13 14 15 16 17 18 19 20 31 32 3334 35 36 37 38 39 40545115253 54 55 56 57 58 59 60 30 1620 Series 1 vs 30 6620 Series 2 EMS differences The EMS functions assigned to certain pins have been changed and no longer match the 30 1620 EMS Unless otherwise noted the following pins and functions will need to be manually reconfigured after using AEMTuner to convert a V1 19 30 1620 Series 1 EMS calibration for use with the 30 6620 Series 2 hardware 89 98 Nissan Skyline RB26DETT 1990 1995 Nissan 300ZX 93 96 Nissan Silvia S14 SR20DET 93 98 Nissan Skyline RB25DET VG30DE VG30DETT 1992 88 91 Nissan Silvia 13 CA18DET 30 1620 30 6620 89 94 Nissan Skyline RB20DET 1994 Nissan Maxima VE30DE 89 93 Nissan 180SX CA18DET function function lanition 5 lanition 2 lanition 2 k Coil outputs reallocated for sequential 2 g g 9 Coil 2 Coil 5 ignition Coil2 no longer wasted spark AIV Solenoid 90 92 300ZX Variable Butterfly Solenoid Coil 5 moved to pin 2 lo co Pomer Solni Modna DM GATSDET ori ij E ne eo lanition 6 lanition 4 Ignition 3 SR20DET2. 2205 126 Street Unit A Hawthorne CA 90250 Phone 310 484 2322 Fax 310 484 0152 http www aempower com Instruction Part Number 10 6620 Page 1 of 14 Thank you for purchasing an AEM Engine Management System The AEM Engine Management System EMS is the result of extensive development on a wide variety of cars Each system is engineered for the particular application The AEM EMS differs from all others in several ways The EMS is a stand alone system which completely replaces the factory ECU and features unique Plug and Play Technology which means that each system is configured especially for your make and model of car without any jumper harnesses There is no need to modify your factory wiring harness and in most cases your car may be returned to stock in a matter of minutes For stock and slightly modified vehicles the supplied startup calibrations are configured to work with OEM sensors providing a solid starting point for beginner tuning For more heavily modified cars the EMS can be reconfigured to utilize aftermarket sensors and has many spare inputs and outputs allowing the elimination of add on rev limiters boost controllers nitrous controllers fuel computers etc It also includes a configurable onboard 1MB data logger that can record any 16 EMS parameters at up to 250 samples per second Every EMS comes with all functions installed and activated there is no need to purchase options or upgrades to unlock the full pot
3. Fan Sub Relay RB26DETT only 300ZX Turbo Only Air Conditioner Relay CA18DET only sw side s Output PnP for Cooling Fan CA18DET only PnP for AC Tachometer PT twice Output PnP for Tachometer intemal pull up resistor to 12V AIV Solenoid 90 92 300ZX Variable Butterfly Solenoid Output Power Solenoid Maxima JDM CA18DET only Low Side 12 p Available switched Ground 1 5A max ECM Ground pe wer Grovni input Dedicated 2 Ka 4 KE Ki EA E _ _ Ignition 6 Ignition 4 Ignition 3 SR2ODET only Output 9 9 Ignition 4 CA18DET only Coil 6 p PnP for Coil 6 0 5V rising edge trigger Ignition 2 Ignition 5 Ignition 4 SR20DET only Output PnP for Coil 2 0 5V rising edge trigger Ignition 4 Ignition 6 Output PnP for Coil 4 0 5V rising edge trigger S o N ECCS Relay control Main Relay Ignition Relay control control Output Dedicated EMS activates relay with switched GND Pome Data Link Connector Data Link Connector Injector 7 Output Avail Switched Ground 1 54 max Power Steering Oil Pressure Switch Cooling Fan Relay Cooling Fan Relay SR20DET only Low Side 3 Output PnP for Cooling Fan ECM Ground Dedicated Wire View of AEM EMS po La ee eee N ae cE A T Control Unit Idle 5 Output Avail switched Ground 12V 1 5A Max 3 E A 7 co 30 41 42 43 44 45 46 47 48 4 KO U
4. PnP for Cooling Fan Front Mass Air Flow Ground Power Steerina Oil Press sw Power Steering Oil Press sw RB26DETT g SR20DET Only Switch 2 Input Available switch must connect to ground IAT Sensor RB26 FICD solenoid Fuel Temperature Sensor RB25 300ZX Only AIT Input Avail Air Temperature 2 2kQ pull up resistor 37 Mass Air Flow Pin D CA18DET Non Catalytic Model Only ADCR14 Input Avail 0 5 Volt Input Throttle Position Sensor TPS PnP for Throttle Position signal EGR Temperature Sensor EGT 1 Available jumper set for 0 5V Input Front Mass Air Flow Signal Fuel Pump Voltage Control Boost Pressure Sensor SR20DET RB26DETT 300ZX Turbo Only Only MAP Input Available use this pin for Speed Density conversion o ai caniH Dedicated 22 23 24 EJ 26 27 28 EJ 30 EJ El EJ El EJ EA 38 39 40 1 102 103 104 105 106 1107 108 2 3 4 5 6 7 8 91 21e2 e3456 27 28 29 30 41 42 43 44 45 46 47 48 49 5 109 110 111 112 113 114 115 116 H uhell 15116 17 18 19 20 31 32 3334135 36 37 38 89 40151152 53 54 55 56 57 585960 Connection Diagram for EMS P N 30 6620 89 98 Nissan Skyline RB26DETT 1990 1995 Nissan 3
5. 00ZX 94 96 Nissan Silvia S14 SR20DET 93 98 Nissan Skyline RB25DET VG30DE VG30DETT 1992 88 91 Nissan Silvia S13 CA18DET AEM EMS 89 94 Nissan Skyline RB20DET 1994 Nissan Maxima VE30DE 89 93 Nissan 180SX CA18DET 30 6620 I O Cam igra mpu O MA omneis to PRSI Reference Signal Cam Signal Input connects to pin 51 Dedicated must use AEM replacement trigger disc Camshaft Position Sensor Signal connects to pin 52 99 Ignition Switch start position de Dedicated Neutral Position Switch Switch 4 Available switch must connect to ground Main relay Ignition Switch input Input Dedicated 12V activates Main Relay circuit Air Conditioner Switch Switch 6 PnP for A C request switch Diagnostics Check Signal EGT 4 Available jumper set for 0 5V Input 5V Sensor reference power Output Dedicated 12V Power Supply For ECM Switched Dedicated 12V power when ECCS Relay is on ECM Ground Dedicated za Dedicated must use AEM replacement trigger disc 51 Camshaft Position Reference Signal Cam Signal connects to pin 41 Camshaft Position Sensor Signal Crank Signal Dedicated connects to Pin 42 i T3 Vehicle Vehicle Speed Sensor Signal Speed PnP for Vehicle Speed Sensor Idle Position Switch Switch 1 Available switch must connect to ground Rear Heated Oxygen Sensor Left Side Heated Oxygen RB26DETT Sensor AG FICDICATSDET Only 02 2 Input Dedicated 0 5V signal j Throttle Sensor Output Signal Throttle Sensor Output Signal D
6. A fuse Black battery or chassis GND 29 02 1 30 Sensor GND White 0 5W analog signal Brown Analog signal 48 SV sensor power Red SV sensor power 35 MAP signal Green MAP signal MAP Sensor 30 2130 50 30 sensor GND Black sensor ground Air Temperature Sensor 30 2010 30 sensor GND o Switch 2 30 6620 N Switch GND Connection Diagram for EMS P N 30 6620 These pins are used in the AEM supplied startup calibration They can be reconfigured by the end user Available Not used by the startup calibration Modifications to the OEM wiring may be required before use Dedicated The location of these pins is fixed and must not be changed 89 98 Nissan Skyline RB26DETT 1990 1995 Nissan 300ZX 94 96 Nissan Silvia S14 SR20DET 93 98 Nissan Skyline RB25DET VG30DE VG30DETT 1992 8891 Nissan Silvia S13 CA18DET AEM EMS 89 94 Nissan Skyline RB20DET 1994 Nissan Maxima VE30DE 89 93 Nissan 180SX CA18DET 30 6620 I O Ignition 1 Ignition 1 Ignition 1 Output PnP for Coil 1 0 5V rising edge trigger Ignition 5 Ignition 2 Ignition 2 Output PnP for Coil 5 0 5V rising edge trigger Ignition 3 Ignition 3 Ignition 3 CA18DET only Output PnP for Coil 3 0 5V rising edge trigger AAC Valve mre PnP for Idle Air Control connects to Pin 106 AIT Control Unit Wastegate Solenoid JDM CA18 only Output Pip for Boost contol gone i to Pings gt Cooling Fan Relay Cooling
7. EMTuner software onto your PC The latest version of the AEMTuner software can be downloaded from the AEMTuner section of the AEM Performance Electronics forums Series 2 units are not supported by the older AEMPro tuning software 2 3 Remove the Stock Engine Control Unit a b Access the stock Engine Control Unit ECU The Skyline ECU is located behind the passenger side kick panel Carefully disconnect the wiring harness from the ECU Avoid excessive stress or pulling on the wires as this may damage the wiring harness Some factory ECUs use a bolt to retain the factory connectors and it must be removed before the harness can be disconnected There may be more than one connector and they must all be removed without damage to work properly with the AEM ECU Do not cut any of the wires in the factory wiring harness to remove them Remove the fasteners securing the ECU to the car body and set them aside Do not destroy or discard the factory ECU as it can be reinstalled easily for street use and troubleshooting Install the AEM Engine Management System a O O TG D Plug the factory wiring harness into the AEM EMS and position it so the wires are not pulled tight or stressed in any manner Secure the EMS with the provided Velcro fasteners Plug the comms cable into the EMS and into your PC Turn the ignition on but do not attempt to start the engine At the time these instructions were writ
8. Installation Instructions for EMS P N 30 6620 1989 1998 Nissan Skyline RB26DETT 1993 1998 Nissan Skyline RB25DETT 1989 1994 Nissan Skyline RB20DET 1990 1995 Nissan 300ZX VG30DE VG30DETT 1992 1994 Nissan Maxima VE30DE 1994 1996 Nissan Silvia SR20DET Except Europe 1988 1990 Nissan Silvia S13 CA18DET 1988 1990 Nissan 180SX CA18DET WARNING This installation is not for the tuning novice nor the PC illiterate Use this system with EXTREME caution The AEM EMS System I allows for total flexibility in engine tuning Misuse of this product can destroy your engine If you are not well versed in m engine dynamics and the tuning of management systems or are not PC literate please do not attempt the installation Refer the installation to a AEM trained tuning shop or call 800 423 0046 for technical assistance You should also visit the AEM EMS Tech Forum at http www aempower com NOTE AEM holds no responsibility for any engine damage that results from the misuse of this product This product is legal in California for racing vehicles only and should never be used on public highways Note Part number 30 6620 supersedes and replaces p n 30 1620 30 1621 and 30 1622 1989 1998 Nissan Skyline RB26DETT 1993 1998 Nissan Skyline RB25DETT 1991 1995 Nissan 300ZX VG30DETT VG30DE 1994 1996 Nissan Silvia S14 SR20DET 1988 1990 Nissan Silvia S13 CA18DET 1988 1990 Nissan 180SX CA18DET 2010 ADVANCED ENGINE MANAGEMENT INC
9. a 0 psi boost the fuel correction is being made by the Boost Fuel Trim Table Note the Boost Fuel Trim Table must be adjusted if a different MAP sensor is installed or if the Load breakpoints are adjusted The Boost Fuel Trim value should be set to 90 at 10kPa 0 at 100 kPa 100 at 200 kPa 200 at 300 kPa etc Peak and Hold Injector Drivers Injectors 1 6 include Peak 4 amps and Hold 1 amp injector drivers These drivers may be used with peak and hold or saturated type injectors The factory Nissan wiring harness may contain a resistor pack to prevent excessive current when using low impedance injectors with the stock ECU With the 30 6620 installed users can elect to remove and bypass the OEM resistor pack for more precise control of low impedance injectors Please note that the injector response time will be different with and without the factory injector resistor pack If the OEM resistor pack has been removed and bypassed please use the correct battery offset wizard for your injectors Most battery offset wizards will specify lt P amp H DRIVER if they are intended for use without a resistor pack Wiring accessories to the EMS Please follow this suggested wiring diagram when adding accessories such as UEGO gauges MAP sensors IAT sensors or switches for use with the EMS Note that wire polarity is not important for the Air Temperature sensor AEM UEGO 30 5130 Pink switched 12V power Red 12 power 5
10. curred due to the failure of this product Warranty claims to AEM must be transportation prepaid and accompanied with dated proof of purchase This warranty applies only to the original purchaser of product and is non transferable All implied warranties shall be limited in duration to the said 12 month warranty period Improper use or installation accident abuse unauthorized repairs or alterations voids this warranty AEM disclaims any liability for consequential damages due to breach of any written or implied warranty on all products manufactured by AEM Warranty returns will only be accepted by AEM when accompanied by a valid Return Merchandise Authorization RMA number Product must be received by AEM within 30 days of the date the RMA is issued Please note that before AEM can issue an RMA for any electronic product it is first necessary for the installer or end user to contact the tech line at 1 800 423 0046 to discuss the problem Most issues can be resolved over the phone Under no circumstances should a system be returned or a RMA requested before the above process transpires AEM will not be responsible for electronic products that are installed incorrectly installed in a non approved application misused or tampered with Any AEM electronics product can be returned for repair if it is out of the warranty period There is a minimum charge of 75 00 for inspection and diagnosis of AEM electronic parts Parts used in the repair of AEM el
11. ectronic components will be extra AEM will provide an estimate of repairs and receive written or electronic authorization before repairs are made to the product 2010 ADVANCED ENGINE MANAGEMENT INC 2205 126 Street Unit A Hawthorne CA 90250 Phone 310 484 2322 Fax 310 484 0152 http www aempower com Instruction Part Number 10 6620 Page 14 of 14
12. edicated for use with GT R auxiliary devices Attesa AWD Throttle Sensor Output Signal Auto Trans only Auto Trans only TPS Out Output control Dashboard display ije i Power for Idle Position switch 57 Power source for Idle Position switch CA18DET CANAL Output Dedicated Power Supply Back Up Permanent 12V Input Dedicated backup power for internal datalog 12V Power Supply for ECM Switched Dedicated 12V power when ECCS Relay is on SLI Dedicated Wire View of AEM EMS GEGEGEBECGBEECEGEGEGE E 21 22123 242526127128l29 30 41 42143 44 45 46 47 48 49 50 ellecle3edle5e6 7 82930 Connection Diagram for EMS P N 30 6620 89 98 Nissan Skyline RB26DETT 1990 1995 Nissan 300ZX 94 96 Nissan Silvia S14 SR20DET 93 98 Nissan Skyline RB25DET VG30DE VG30DETT 1992 88 91 Nissan Silvia S13 CA18DET AEM EMS 89 94 Nissan Skyline RB20DET 1994 Nissan Maxima VE30DE 89 93 Nissan 180SX CA18DET 30 6620 I O 101 Injector 1 Injector 1 Injector 1 Injector 1 Output PnP for Injector 1 Peak amp Hold 4A 1A driver P EGR Control Solenoid Valve 402 EGR Control Solenoid valve SR20DET only Injector 12 Output Avail Switc
13. ential of your unit The installation of the AEM EMS on the supported vehicles uses the stock sensors and actuators After installing the AEMTuner software the startup calibration will be saved to the following folder on your PC C Program Files AEM AEM Tuner Calibrations Nissan Multiple calibrations may be supplied for each EMS additional details of the test vehicle used to generate each calibration can be found in the Calibration Notes section for that file Please visit the AEM Performance Electronics Forum at http www aempower com and register We always post the most current strategy release PC Software and startup calibrations online On the forum you can find and share many helpful hints tips to make your EMS perform its best TUNING NOTES AND WARNING While the supplied startup calibration may be a good starting point and can save considerable time and money it will not replace the need to tune the EMS for your specific application AEM startup calibrations are not intended to be driven aggressively before tuning We strongly recommend that every EMS be tuned by someone who is already familiar with the AEM software and has successfully tuned vehicles using an AEM EMS Most people make mistakes as part of the learning process be warned that using your vehicle as a learning platform can damage your engine your vehicle and your EMS Read and understand these instructions BEFORE attempting to install this product 1 Install A
14. gger pattern A replacement trigger disc is now included with every Nissan EMS and must be installed before attempting to start the engine Two discs are supplied with each 30 6620 EMS one disc fits the CAS sensor found on RB VG CA and VE engines the other disc fits SR and 99 03 Skyline GTR sensors Please consult the following instructions supplement which will be installed to the C Program Files AEM AEMTuner Instructions folder 10 6600 B for EMS 30 66XX supplement CAS trigger install RB and SR engines PDF 10 6620 A for EMS 30 6620 supplement CAS trigger install RB VG and VE engines PDF Engine Wiring Harnesses swapped engine installations Many Nissan wiring harnesses have been found to contain significant differences between model years and or trim levels Likely differences include Crank signal Cam signal Ignition switch wiring the Ignition switch input controls the Main Relay output injector and coil destinations Official documentation for many of these vehicles was not offered in English so it would be very wise to double check the pinout destinations for these circuits This is especially true if the vehicle contains a swapped engine or if the wiring harness has been cut spliced soldered re routed re pinned or modified in any other manner It is the user s responsibility to check that the wiring on the vehicle matches the pinout chart contained in this instruction manual AEM will not be held re
15. hed Ground 1 5A max not Peak amp Hold Injector 3 Injector 3 Injector 3 Output PnP for Injector 3 Peak amp Hold 4A 1A driver 104 Fuel Pump Voltage Control ADCR11 Available 0 5 Volt Input Injector 3 106 Fuel Pump Voltage Control 2 RB26DETT 10 ECM Ground i 108 ECM Ground Dedicated Back Electromotive Current Power CA18 Back Up Power 109 Feedback Circuit Power Supply For ECM SR20 Not Used 4 z 110 Injector 5 Injector 2 Injector 2 Injector 5 Output PnP for Injector 5 Peak amp Hold 4A 1A driver AG Solenoid Valve uput PnP for Idle Air Control connects to Pin 4 Oooo Power Ground input Dedicated i Injector 6 RB20 Inj 4 Injector 4 Injector 4 Injector 6 Output PnP for Injector 6 Peak amp Hold 4A 1A driver VTC Solenoid Valve RB25DET VTC Solenoid Valves VTC Solenoid Valve SR20DET only Injector114 Output Avali Swiiched Ground 4 SA max acl Peake ok Injector 4 RB20 Inj 6 Injector 6 Injector 4 Output PnP for Injector 4 Peak amp Hold 4A 1A driver 4 Oxygen Sensor Heater Control Output Injector 10 P Avail Switched Ground 1 5A max not Peak amp Hold Signal 116 Wire View of AEM EMS 105 Injector 2 Injector 5 Pe Injector 2 Output PnP for Injector 2 Peak amp Hold 4A 1A driver PRVR Control Solenoid Valve PRVR Control Solenoid Valve CA18 injectorg Output Avall Switched Graund E
16. o 109 110 111 114 ro LJ gt Ul m ro W b J m J co OD ro o 39 401151 5215354155565 7158 5 KO J Connection Diagram for EMS P N 30 6620 89 98 Nissan Skyline RB26DETT 1990 1995 Nissan 300ZX 94 96 Nissan Silvia S14 SR20DET 93 98 Nissan Skyline RB25DET VG30DE VG30DETT 1992 88 91 Nissan Silvia S13 CA18DET AEM EMS 89 94 Nissan Skyline RB20DET 1994 Nissan Maxima VE30DE 89 93 Nissan 180SX CA18DET 30 6620 I O Diagnostios Receive Data EGT2 Available jumper set for 0 5V Input Diagnostics Transmit Data Switch 3 Available switch must connect to ground Knock Sensor Cylinders 4 6 Available software knock filter Wastegate Valve Control Solenoid Wastegate Solenoids z 300ZX TT Only VVastegaje Solenoid PREDE ony Output PnP for Boost control connects to Pin 5 Rear Mass Air Flow Sensor z 27 RB26DETT Mass Air Flow Sensor Mass Air Flow Sensor PnP for MAF Sensor ee sre MN NI PnP for Engine Coolant Temp tt Right Side Heated Oxygen Front Heated Oxygen Sensor Signal Heated Oxygen Sensor Signal 02 41 Input Dedicated 0 5V signal lt Sensor Diagnostics Clock EGT 3 Available jumper set for 0 5V Input Low Side Exhaust Temperature Light F Cooling Fan Hi Speed SR20DET RB25DET Only ri Pomsnam 0DZX ONI Diagnostics CA18DET Injector 8 Output
17. only Coil outputs reallocated for sequential 9 9 Ignition 4 CA18DET only Coil 1 Coil 6 ignition Coil1 no longer wasted spark fag mens tartrate cona ignon Cois no longer wasted spark g g Coil 3 Coil 4 ignition Coil3 no longer wasted spark LS 11 deli gt e y y poll 4 CANIH Throttle Sensor Output Signal Throttle Sensor Output Signal Throttle Sensor Output Signal 5 peni Auto Trans only Auto Trans only HS 1 TPS Out HS 1 no longer available i Power for Idle Position switch Power sourceforidle Fosition switeh CA18DET Idle 8 CAN1L Idle 8 not available i EGR Control Solenoid Valve SR20DET Mao TN I ite 7 INJI2 copy stings tom ite 7 o NJI 113 VTC Solenoid Valve RB25DET VTC Solenoid Valves VTC Solenoid Valve SR20DET only LS 08 INJ 11 Copy settings from LS 8 to INJ11 AEM Electronics Warranty Advanced Engine Management Inc warrants to the consumer that all AEM Electronics products will be free from defects in material and workmanship for a period of twelve months from date of the original purchase Products that fail within this 12 month warranty period will be repaired or replaced when determined by AEM that the product failed due to defects in material or workmanship This warranty is limited to the repair or replacement of the AEM part In no event shall this warranty exceed the original purchase price of the AEM part nor shall AEM be responsible for special incidental or consequential damages or cost in
18. sity Input 370cc min 300ZX SR20DET 380cc min Skyline GTS T Occ min Skyline GT R Injector Resistance ohm GT R 180SX 11 ohm others Knock Sensors used Skyline 300ZX 1 others Idle Motor Type i ADCRIA Pin 37 4 AEM trigger disc i ight Low Side 10 Pin 32 Transmission M T Automatic i Switch 2 Pin 34 _Offered Drive Options AWD Skyline RWD Skyline Switch 4 Pin 44 3002X Silvia 180SX FWD Supplied i Switch 6 Pin 46 Connectors AEM extension patc harness 101 102 103 104 1051061107 108 1 2 3 4 5 6 21 22 23 24 25 26 27 28 29 30 41 42 43 44 45 46 47 48 49 50 109 110 111 f112 113 114 115 i16 511 12 13 14 15 16 17 18 19 20 31 3233134353637 3839 40 51 52 5354 53 56 57 58 59 60 WARNING All switch input pins must connect to ground the switch should not provide 12V power to the EMS because that will not be detected as on or off Cam Crank Angle Sensor AEM trigger disc MUST be used Discrepancies have been observed in the OEM cam crank angle signals between model years and or trim levels to avoid confusion the Series 2 EMS does not support the OEM Nissan tri
19. sponds but the Engine Load channel continues to measure atmospheric pressure correctly Start the engine and make whatever adjustments may be needed to sustain a safe and reasonably smooth idle Verify the ignition timing Select Wizards gt gt lgnition Timing Sync from the pull down menu Click the Lock Ignition Timing checkbox and set the timing to a safe and convenient value for instance 10 degrees BTDC Use a timing light and compare the physical timing numbers to the timing value you selected Use the Sync Adjustment Increase Decrease buttons to make the physical reading match the timing number you selected Crankshaft timing marks are not labeled for some vehicles Consult the factory service manual for more information The diagram below shows labels for the R33 Skyline Note This calibration needs to be properly tuned before driving the vehicle It is intended for racing vehicles and may not operate smoothly at idle or part throttle NEVER TUNE THE VEHICLE WHILE DRIVING 5 Troubleshooting an engine that will not start a Double check all the basics first engines need air fuel compression and a correctly timed spark event If any of these are lacking we suggest checking simple things first Depending on the symptoms it may be best to inspect fuses sufficient battery voltage properly mated wiring connectors spark using a timing light or by removing the spark plug wiring continuity tests measure ECU pinout
20. sponsible for loss or damage that can occur if the EMS is installed in a vehicle in which the wiring harness does not match the AEM supplied pinout chart The function of several pins have been changed from the original 30 1620 30 1621 and 30 1622 EMS please see the pinout chart for more info Primary Load Sensor EMS Fuel Strategy The factory MAF mass air flow sensor s can be removed to help decrease intake air restriction the EMS can be configured to use a MAP sensor to determine engine load It is recommended to use a 3 5 bar MAP sensor or higher P N 30 2130 50 The factory Mass Air Flow sensor can be used as the primary load input for the AEM EMS if desired the EMS will only use one MAF sensor for fuel calculations even if the vehicle is equipped with two Please check the Notes section of each calibration for more info about the vehicle setup and fuel strategy that calibration was configured to use EMS Fuel Map Boost Fuel Trim Table The 30 6620 maps provided utilize the Boost Fuel Trim Table to provide a 1 1 fuel compensation above and below atmospheric pressure In the startup calibration the Boost Fuel Trim Table is configured to provide twice as much fuel when the manifold pressure is twice as high and half the fuel when the manifold pressure is half as high this should help simplify the tuning process for different vacuum and boost levels Notice the values in the main Fuel Map do not change above 100 kP
21. ten new EMS units do not require USB drivers to be installed on the PC Windows With the AEMTuner software open select ECU gt gt Upload Calibration to upload the startup calibration file cal that most closely matches the vehicle s configuration to be tuned Check the Notes section of the calibration for more info about the vehicle it was configured for These files can be found in the following folder C Program Files AEM AEM Tuner Calibrations Nissan Set the throttle range Select Wizards gt gt Set Throttle Range and follow the on screen instructions When finished check that the Throttle channel never indicates less than 0 2 or greater than 99 8 this is considered a sensor error and may cause some functions including idle feedback and acceleration fuel to operate incorrectly For Nissan vehicles the OEM camshaft angle sensor s trigger disc must be removed and an AEM trigger disc must be installed before attempting to start the engine Please see pg 7 for more info 4 Ready to begin tuning the vehicle a o c Before starting the engine verify that the fuel pump runs for a couple of seconds when the key is turned on and there is sufficient pressure at the fuel rail If a MAP sensor is installed check that the Engine Load indicates something near atmospheric pressure approximately 101kPa or 0 PSI at sea level with the key on and engine off Press the throttle and verify that the Throttle channel re
22. voltages replace recently added or untested components with known good spares Check that all EMS sensor inputs measure realistic temperature and or pressure values If the EMS is not firing the coils or injectors at all open the Start tab and look for the Stat Sync d channel to turn ON when cranking This indicates that the EMS has detected the expected cam and crank signals if Stat Sync d does not turn on monitor the Crank Tooth Period and T2PER channels which indicate the time between pulses on the Crank and T2 Cam signals Both of these channels should respond when the engine is cranking if either signal is not being detected or measuring an incorrect number of pulses per engine cycle the EMS will not fire the coils or injectors If the Engine Load changes when the throttle is pressed this usually indicates that there is a problem with the MAP sensor wiring or software calibration when the EMS detects that the MAP Volts are above or below the min max limits it will run in a failsafe mode using the TPS to Load table to generate an artificial Engine Load signal using the Throttle input This may allow the engine to sputter or start but not continue running properly Application Notes for EMS P N 30 6620 RB26DETT RB25DETT RB20DET VG30DE VG30DETT VE30DE SRZUDET and CA18DET Make Models Displacement 5 3 6 2 4 Skyline 1 2 300ZX 1 3 4 2 SR20 CA18 Injector Flow Rate 70cc min 180SX Skyline RB20 Speed Den
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