P1610

P1610

Air-conditioning system regulator, communication

NOTE: Internal function test completed.

Diagnostic conditions
The air-conditioning system regulator initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored.

Air-conditioning system regulator wake-up through:
- event-induced CAN message
- "Ignition on"

Possible fault causes
- No power supply for air-conditioning system regulator
- Air-conditioning system regulator incorrectly coded
- Short circuit or open circuit in the CAN convenience
- Air-conditioning system regulator faulty (in most cases the cause is not the air-conditioning system regulator but incorrect coding.)

Fault effects
- Communication via the CAN convenience is no longer possible.
- No other control modules are able to communicate with the air-conditioning system regulator.

Affected contacts on the air-conditioning system regulator connector

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