Year of Manufacture *: 2008
( Optional ) Engine Code or CC: Z13DTJ
Just come back to diagnostics after 8 year sabbatical so I'm still playing catch-up.
A local garage had recovered this, I think due to no-start, found the ECU sitting in water, sent it away for repair. The vehicle now starts. When I arrived it had multiple Canbus communication errors for, just about, every module. I didn't have any problems communicating with them. Scoped Canbus signal at the EOBD socket and it appeared absolutely fine. Got as far as continuity checks from eobd socket, of Canbus to ECU and ABS with no apparent problems. I chose these modules as there was an ECU fault code as well relating to no comms. with ABS. I then cleared all the fault codes and took for a quick test drive around the bumpy industrial estate. Then I found many of the comms. codes had disappeared, but still no comms. between ABS and ECU, among others. I've now got a full wiring diagram, and a Canbus block diagram.
Not after the proverbial magic bullet (would be great to get one) but would like your views on the way forward. It seems as if disconnecting the battery before doing continuity checks reset something (BCM?) and reduced a lot of the comms. errors.
I've read that the BCM can become corrupted if the battery is flat and/or the car is bump-started. Both may have happened. Also will investigate interference from alternator.
Summary of last errors;
ECU
P0650-70 Canbus - no comms. BCM or CIM
U2107-00 Canbus - no comms. BCM or IPC
U2108-00 Canbus - no comms. ABS
ABS
No faults
EPS
C0000-08 VSS multifunction
C044A-08 No RPM
BCM
U2108-00 Canbus - no comms. with ABS
After test drive just read codes from the above modules, and will be checking continuity to BCM and EPS as well tomorrow, along with wiggle test etc.. I realise some of the above codes may be a different issue and therefore not relevant.
Do the different modules i.e. ECU and ABS, communicate with each other, or are all relevant messages arbitrated by one module, BCM for example, and dished out as required?
Any thoughts welcome...
Nick
Message Thread
« Back to index | View thread »
Copyright © uk autotalk