P025C

P025C

Diagnosis information - Control unit DME (DFI)

Fuel pump control unit: Activation

Diagnostic conditions
- Engine start (Electric fuel pump activated)

Possible fault causes
- Fault in area Electric fuel pump (See INFORMATION)
- Short circuit to ground Control lead Control unit DME (DFI) --> Fuel pump control unit
- Fuel pump control unit Faulty

INFORMATION:
- If the fuel pump control unit detects an external or internal fault, it connects the control line to ground for a certain time.
- This short circuit to ground is recognised as the fault type >>Below limit value<<, just like an actual short circuit to ground of the control line.