Diagnosis Information - DME (DFI)

P1655

Diagnosis information - DME (DFI)

Coolant switch-over valve driver

NOTE: The coolant switch-over valve is briefly switched on and is then switched off again after the engine start.

Diagnostic conditions
- Engine start

Possible fault causes
- Short circuit to B+/ground/between lines or open circuit in the control line
- Coolant switch-over valve faulty