Hi, my '99 E39 has a problem, where the ASC, ABS and transmission warning lights light up. When this happens, the car can't change gear, and the sppedometer does not Work. I have read out ther faults, and there are a heap of CAN faults in all ECUs. If I read out the faults while the fault is present, there is no contact with these ECUs
JA: How old is the transmission? Have you checked the brake
Customer: This has no bearing on the CAN communication problem. When the fault is present, there is obviously no CAN communication
JA: What is the model of your '99 BMW?
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: I am a Mercedes technician, so yes. I have already described what I have tried, I am thinking about putting a scope on the CAN lines to see what happens to the signal