Results 1 to 9 of 9

Thread: e92 programming harness

  1. #1
    Tuner in Training
    Join Date
    Jan 2015
    Posts
    22

    e92 programming harness

    I just built a E92 programming harness , but I cannot connect or get the ECM to turn on. I believe my wiring diagram is correct. the ECM is drawing 26ma with switch off and 48 when switched on. I'm trying to connect with a gm MDI. I purchased the ECM used off ebay. any thoughts would be helpful

    E92 programming cable.GIF

  2. #2
    Advanced Tuner
    Join Date
    Oct 2013
    Posts
    550
    Nice drawing !!!

    Is that a diode connected to pins 22 and 26 ?

    You have ignition (switched) voltage going to pins 51 and 73 (not certain if 73 is necessary or not). Pin 70 (Accessory Wakeup) needs ignition voltage.

  3. #3
    Tuner in Training
    Join Date
    Jan 2015
    Posts
    22
    that is an LED to let you know that switched power is being applied to pin 51 and 73, simulating ignition on. I also tried putting +12v to Pin 70 (Accessory Wakeup) and current draw did not go to any considerable amount. when I say +12v, I mean 13.2V from a regulated bench power supply with about 40mV ripple
    Last edited by sparkness; 02-06-2015 at 08:21 AM.

  4. #4
    Advanced Tuner
    Join Date
    Oct 2013
    Posts
    550
    Have never measured voltage draw - so no idea on that. With pin 70 hot, you should now have CanBus comms with the ECM - try reading the calibration to confirm.

  5. #5
    your pin 22 and 26 for ground don't look correct
    22 - A/C Refrigerant Pressure Sensor Low Reference
    26 - Fuel Level Sensor Low Reference

    Here is how I wired my E92 for MDI programming

    X1 connector
    Battery 12V - Pin 52
    Switched 12v - Pin 51
    CAN + - Pin 39
    CAN - - pin 40

    x2 connector
    Ground - Pin 73

    That is all that was needed.
    -Greg
    Last edited by radrace19; 02-06-2015 at 11:35 AM.
    2009 Maverick Silver G8 GXP M6 - 586hp
    Engine Mods: TVS 2300 Magnacharger ARH 1 7/8" long tubes with catted x-pipe
    Drivetrain Mods: Ram Dual Disc Clutch
    Suspension Mods: Pedders/Wretched basic drag pack - BMR trailing arms
    Misc Mods: Jamesbiz Catch can - GRRRR8 Heater hose relo kit

  6. #6
    Tuner in Training
    Join Date
    Jan 2015
    Posts
    22
    I put +12V to pin 70 and could not read , I measured continuity between pins[X1 22. 26, 30, 53, 68] and [X2 pin 73] and [X3 pin73] they are all signal ground connections. I did connect [X2 pin73] to battery - as well and could not read, my guess is a dead ecm, I will get another and try again. It was very dry in my office and I did have a static spark touching the case - maybe i blew it

  7. #7
    Tuner in Training
    Join Date
    Jan 2015
    Posts
    22
    here is the correct Schematic
    E92 programming cable.GIF

  8. #8
    Tuner in Training
    Join Date
    Jan 2015
    Posts
    22
    O.K. I am able to read the new ECM with this cable the ECM draws 0 ma with power off and 280 ma with power switched on at 13.2V
    next I will re-flash using SPS
    Quote Originally Posted by sparkness View Post
    here is the correct Schematic
    E92 programming cable.GIF

  9. #9
    Quote Originally Posted by radrace19 View Post
    your pin 22 and 26 for ground don't look correct
    22 - A/C Refrigerant Pressure Sensor Low Reference
    26 - Fuel Level Sensor Low Reference

    Here is how I wired my E92 for MDI programming

    X1 connector
    Battery 12V - Pin 52
    Switched 12v - Pin 51
    CAN + - Pin 39
    CAN - - pin 40

    x2 connector
    Ground - Pin 73

    That is all that was needed.
    -Greg
    After a lot of testing I have to agree with you. That is all you need for bench top flashing. With pins 22 and 26 the vcm says unlock delay not respected, and with the resistor wired in i get the ''detect protocol failed''.

    Thanks a lot to both of you for providing the informations