U0111

U0111

Diagnosis information - CAN

Vehicle electrical system control module, communication

NOTE: Internal function test completed.

Diagnostic conditions
The vehicle electrical system control module initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored. Vehicle electrical system control module wake-up through:
- event-induced CAN message
- wake-up signal via wake-up line
- "Ignition on"

Possible fault causes
- Power supply for the vehicle electrical system control module is incorrect
- Vehicle electrical system control module is incorrectly coded
- Short circuit or open circuit in the CAN comfort
- Vehicle electrical system control module faulty (in most cases the cause is not the vehicle electrical system control module but incorrect coding.)

Fault effects
- Communication via the CAN comfort is no longer possible.
- No other control modules are able to communicate with the vehicle electrical system control module.

Affected contacts on the vehicle electrical system control module connector
Connector A:
- 27 power supply - terminal 15
- 37 CAN comfort high
- 38 CAN comfort low
- 42 ground supply

Connector B:
- 3 power supply - terminal 30
- 21 wake-up