P1915

P1915

Diagnosis information - DME V6 DFI

Driver of auxiliary water pump relay

NOTE: If the control unit connector B is disconnected from the DFI during fault finding or if the power supply is interrupted elsewhere (battery, fuse), teaching of the throttle valve adjusting unit must be performed.

NOTE: If the ignition is switched on with the connector [B] disconnected from the DFI control unit, the fault >DFI control unit TIMEOUT< can be entered.

Diagnostic conditions
- Battery positive voltage between > 10 V and 16 V
- Time after engine starts > 10 seconds

Possible fault causes
- Short circuit to B+
- Short circuit to ground
- Open circuit in line
- Fuse F10 faulty (fuse carrier in plenum panel E-box)
- Auxiliary water pump relay faulty

Affected contacts on the DFI control unit connector
Connector [B]:
- Contact 33

Affected contacts on the auxiliary water pump relay
- Contact 85
- Contact 86