Originally Posted by
1012901913
Have recently had a dead ECU in Australian 2005 V6 alloytech Holden VZ commodore. New ECU was reprogrammed on bench and installed into vehcile.
I am now able to communication with the ECU but i am recieving alot of CAN communication errors.....
- If I try to read VCM it goes very slowly and randomly stops and retrys (error reading TCM at location ????). it will often fail after 5 retrys on the same location.
The PIM contains the following DTC whilst this is happening....
o U2105 Communication error with ECU (If I disconnect ECU, errors reports cannot communicate with ABC/TC/EPS)
o EEPROM ERROR (There is no code associated with this error)
o Scan tool resets at this point
I have programmed a new PIM, linked to BCM but I still get the same problem, but my scan tools now lock up when checking the DTC's (Says there are 3 set but crashs trying to show me what they are. Hptuners scanner cannot read the codes from my PIM at all, only from TCM and ECU.
I have seen some axcillary serial communication errors logged in both my BCM and instrument cluster but these are not always reproducable and seem to appear randomly.
I feel its either a faulty new ECU, fault PIM's (new and old) or I have interfearance on my can wires. Does anyone have any suggestions? Maybe I need to put a scope on the CAN wires and check the signals
BTW after about 10 retrys trying to read VCM I got a successful read but it failed the validation checks when trying to open the file, so im thinkings it currupted on the read or VCM in vehicle is currupted. I am also unable to relink the VATS on this vehcile tells me it is unable to unlock the VCM.
Thanks,
Brad.