Corsa D no crank no start
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    Default Corsa D no crank no start

    Hi, I have a corsa D 1.2 XEP Manual 2006 no Crank No start.

    This is what I know

    No communication with the ECU
    I can connect to everything Else with a bunch of Can line communication problems
    Starter is good
    Power and earths all good to the ECU
    No 5 Volt reference at the throttle body
    Can bus High and Low scoped all good signals until I get to the ABS A good signal going in to the ABS but no can LOW coming out, I have a good signal on the can high, and that then feeds the ecu that is last in the line.
    Would this prevent the car from cranking and not wake up the ECU ?.

    Paul

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    Default

    I have just scoped the can bus with the ECU disconnected, and still no can Low coming out of the ABS module.

    Codes
    BCM
    B2502 Light switch Beam circuit open- current history
    B3600 Inertia light Dimming Switch circuit open- history
    U2100 Can bus communication malfunction - History
    u2108 Can Bus no communication with ABS
    U2111 Can bus no communication with EPS

    ABS
    U2105 Invalid Data from ECM-current
    U2100 Can Bus communication Malfunction - current

    EPS
    C0000 Vehicle speed sensor circuit malfunction -current
    C044A No engine RPM Signal-Current

    Instruments
    U2100 Can Bus communication Malfunction-history
    u2107 Invalid Signal from BCM-current


    That is a lot of faults mainly Can Bus

    Pauk

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    Default corsa D no Crank

    I have also just found out that the engine control relay K46 is not pulling in, I have power on 86 and 30 and fuses 30 and 33 are dead. The engine control relay K46 is switched on by terminal B19 on the ecu. So it powers itself up by activating this relay. Or am I missing something?. could the ABS problem prevent the ecu from turning itself on?. This really making me think.


    Any help would be very appreciated.

    Paul

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    Default

    Can bus goes through ABS. Try to jump wires from plug to bypass ABS module and see if ECU comes back on line.

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    Default

    ABS is common fault on older Corsa from 2006-2008. Newer ones got a additional cap to protect ABS connector from water.
    Check connector, maybe pins are gone. If you bridge CAN on ABS connector, car should work.

  6. The Following User Says Thank You to exe123 For This Useful Post:

    Moldovan1 (9th September, 2023)

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    Default

    Do I bridge the wires with the abs plug connected, I tried it unplugged and nothing worked

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    Pin 14 & 15 is CAN low (white) and Pin 25 & 26 blue.
    Unplug ABS connector and bridge 14 to 15 and 25 to 26.
    Check if you have communication with ECU

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    Default

    Done that , still no coms with the ECU , still no crank,

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    Then you need to check wires from ABS to ecu if they are ok.

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    Default

    I have already done that

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    Default

    Then try to check if ecu is ok. Wire on bench and check if you can diag it.

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    Ok been to the scrappy and got a ABS pump, I now have a can High and Low signal both sides of the ABS, But the ecu still will not communicate, enough for today, Thanks for the help

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    ""Then try to check if ecu is ok. Wire on bench and check if you can diag it."""

    Can you give me some pointers on how to do this please, this sounds like a good exercise.



    Paul

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    Hi I have found a problem, I took the ecu off yesterday and someone has already been there, The silicon was hanging off, and inside evidence of corrosion and burning. I have tried to inset a picture but I am not sure if I have done it correct, well see what happens, now I dont know if the BCM is damaged, so I am thinking a complete ECU kit from Fleebay

 

 
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