P1608

P1608

Steering wheel electronics (CAN drive) control module, communication

NOTE: Internal function test completed.

Diagnostic conditions
The steering wheel electronics 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.

Steering wheel electronics control module wake-up through:
- event-induced CAN message
- "Ignition on"

Possible fault causes
- No power supply for steering wheel electronics control module
- Steering wheel electronics control module is incorrectly coded
- Short circuit or open circuit in the CAN drive
- Steering wheel electronics control module faulty (in most cases the cause is not the steering wheel electronics control module but incorrect coding.)

Fault effects
- Communication via the CAN drive is no longer possible.
- No other control modules are able to communicate with the steering wheel electronics control module.

Affected contacts on the steering wheel electronics control module connector

Connector A:
- 1 ground supply - terminal 31
- 2 power supply - terminal 30
- 8 CAN drive low
- 9 CAN drive high
- 13 power supply - terminal 15