P2402

P2402

Diagnosis information - DME V8 DFI

Driver for leakage diagnosis pump

Diagnostic conditions
- Vehicle voltage > 9 V
- Time after engine starts > 10 seconds
- Leakage diagnosis pump switched on
- No detection of fault P1556, P1557 or P1558

Possible fault causes
- Vacuum system leaking
--> The system consists of the mechanical vacuum pump (on the vehicle engine), the leakage diagnosis pump, the intake pipe switch-over valve and, where appropriate, the exhaust flaps in the rear muffler
- Vacuum pump faulty
- Fuse F10 faulty (fuse carrier in plenum panel E-box)
- Open circuit in voltage supply of leakage diagnosis pump
- Open circuit in control line of leakage diagnosis pump
- Leakage diagnosis pump faulty (resistance too great)
- Open circuit at connection point KE3 contact 7

Affected contacts on the DME control unit connector
Connector [A]:
- Contact 21

Affected contacts on the leakage diagnosis pump connector
Connector [A]:
- Contact 2