P2401

P2401

Diagnosis information - DME V8 DFI

Leakage diagnosis pump driver below limit value

Diagnostic conditions
- Vehicle voltage > 9 V
- Time after engine starts > 10 seconds
- Leakage diagnosis pump switched off
- 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
- Short circuit to ground in control line
- Leakage diagnosis pump faulty (short circuit)

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

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