Rear/Door Convenience System

Fault code 1336

CAN comfort OFF

Possible causes of fault
- Ignition on
- Battery voltage Ok (11.4 to 14.5 V)
- Internal rear convenience system control unit function test

Possible causes of fault
- Short circuit between high lead and low lead
- Short circuit to B+
- Short circuit to ground
- Fault on a control unit connected to CAN comfort

Affected pins
Rear convenience system control unit: Plug B
- Pin 2 'CAN high (CAN comfort high)'
- Pin 8 'CAN low (CAN comfort low)'

Diagnosis/troubleshooting

NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected pins on the rear convenience system control unit plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and proper contact Repair damaged or corroded pins it possible, otherwise replace affected pins. Repair or replace damaged wires.

NOTE:
Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.

NOTE:
Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and provided, it necessary. On the vehicle electrical system, the voltage to the fuse (input side) must be guaranteed.