Astra J Problem

[Manta1600]

Astra J 2010 1.6 petrol automatic - AKL - added key OK but engine wont crank (central lock working from remote)

the car was a long time with flat battery

Diagnostic can't connect to ECU - error U0100 - ECU communication faulty

Maybe ECU is falty maybe wirings - If I put ECU from other car without immo off - Can I connect diagnostic to ECU to check that wirings are OK?

[gabrilupo]

Yes, u can for sure but wont crank anyway

[Manta1600]

Yes, u can for sure but wont crank anyway

Thanks

If the problem is ECU which oder parts must swap

- Dash
- BCM
- ???

[keygargoil1]

have you done it by obd and have you cleared the faults from the restraints and column unit

[Manta1600]

I erased all possible error codes - with autocom and opcom


U0100 is permanent


I Will try with ECU from other just to check is it wires problem or ECU problem

[Manta1600]

Today I found out why I can't see the Engine ECU


It's missing (stolen) the Automatic Gearbox ECU and this interrupts CAN connection to the Engine ECU


I think that if I connect CAN wires I will have connection with the ECU and the engine will work

Tomorrow I will try

[Manta1600]

Today I connected the CAN line and was able to conect to the engine ECU

631678

after that engine still doesn't crank because there isn't signal for parking position from gearbox ECU

then I connected the starter manually with wire to +12 on the battery and the engine sterted from first time

631681

Now must find ECU for the gearbox