P1626

P1626

POSIP triggering unit, communication

NOTE: Internal function test completed.

Diagnostic conditions
The POSIP triggering unit initially tests internal function sequences after wake-up. If they are OK, all diagnosable outputs are then tested and any faults are stored.

POSIP triggering unit wake-up through:
- event-induced CAN message
- key contact (terminal S)

Possible fault causes
- No power supply for POSIP triggering unit
- POSIP triggering unit incorrectly coded
- Short circuit or open circuit in the CAN drive
- POSIP triggering unit faulty (in most cases the cause is not the POSIP triggering unit but incorrect coding.)

Fault effects
- Communication via the CAN drive is no longer possible.
- No other control modules are able to communicate with the POSIP triggering unit.

Affected contacts on the POSIP triggering unit connector

Connector A:
- 1 power supply - terminal S
- 26 ground supply - terminal 31
- 34 power supply - terminal S
- 40 ground supply - terminal 31
- 49 CAN convenience high
- 50 CAN convenience low