P1602

P1602

Diagnosis information - CAN

Instrument cluster, communication

Diagnostic conditions
The instrument cluster initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored.
Instrument cluster wake-up through:

- Event-induced CAN message
- Wake-up signal via wake-up line
- Ignition on

Possible fault causes
- No power supply for instrument cluster
- Instrument cluster incorrectly coded
- Short circuit or open circuit in the CAN display
- Instrument cluster faulty (in most cases the cause is not the instrument cluster but incorrect coding.)

Fault effects
- Communication via the CAN display is no longer possible.
- No other control units are able to communicate with the instrument cluster.

Affected contacts on the instrument cluster
Connector [A]:
- 8 power supply - terminal 30
- 9 ground supply - terminal 31
- 23 power supply - terminal 30
- 24 ground supply - terminal 31

Connector [B]:
- 19 CAN display high
- 20 CAN display low