I had recently a CIM in hand I have decoded the key position high speed CAN data. Here it is.
CIM CAN ID: 380h
Data format 8 bytes: xx xx xx xx xx xx xx xx
Ignition on: xx 02 xx xx xx xx 07 xx
Start position: xx 03 xx xx xx xx 05 xx
Key out: xx 01 xx xx xx xx 06 xx
Observations: message cycle time is 100 ms or at new data change. If we define data bytes from DB7 to DB0, the following:
- DB7 is a cyclic counter, to indicate CIM is alive and good
- DB0 is a cyclic counter, to indicate CIM is alive and good
A second hand replacement ECU has rectified the original complaint of intermittent cranking
A big THANK YOU to Liviu and Kevin Ives for their invaluable input thorough out this journey that has many twists and turns along the way which I will write about in a case study very soon
Hi all, Signum 2003, Z32SE engine, same symptoms, solved yesterday with another engine ecu. This problem now for sure its typical to this engine / ecu combination.