Diagnosis of Local CAN B

P3203, P3204, P3205 

The diagnosis of the local CAN B data bus consists of several checks with their own fault codes.

If, during initialization of the CAN data bus, the CAN controller reports a CAN B initialization failure, a malfunction is detected and a minimum fault CANB is set.

If, after initialization of the CAN data bus, the CAN controller reports a CAN B failure for a calibrated period of time, a malfunction is detected and a maximum fault CANB is set.

If, after initialization of the CAN data bus, the CAN controller reports a CAN B bus-off state for a calibrated period of time, a malfunction is detected and a signal fault CANB is set.