P2634

P2634

Diagnosis information - DME V6 DFI

Fuel pump relay driver 2 (right)

NOTE: When this fault is stored, the right-hand fuel pump is continuously activated.

NOTE: Any stored faults of the fuel supply (oxygen sensing range [FRAO] and [FRAU]) could be a result of insufficient fuel supply at full load in one-pump operation.

NOTE: Fuel pump 2 (right-hand) is activated briefly by the vehicle electrical system control unit when the driver's door is opened. A short circuit to B+ or ground can also be caused by a fault in this control line or in the vehicle electrical system control unit.

Diagnostic conditions
- Battery positive voltage > 10 V
- Fuel tank level Less than 15 liters or Greater than 60 liters
- Engine running > 10 seconds

Possible fault causes
- Short circuit to B+
- Short circuit to ground
- Open circuit in line
- Fuse FE 13 faulty (fuse carrier in plenum panel E-box)
- Fuel pump 2 relay faulty
- Vehicle electrical system control unit faulty

Affected contacts on the DME control unit connector
Connector [B]:
- Contact 27

Affected contacts on the fuel pump relay connector
- Contact 85