P1180

P1180

Positive Crankcase Ventilation Heater Output Stage - Above Limit

Diagnostic conditions
- Battery voltage between 10 V and 16 V
- Time elapsed after engine start-up greater than 1 second

Possible cause of fault
- Short circuit to B+ in control line
- Positive crankcase ventilation heater faulty (short circuit)
- DME control module faulty

Affected pins
DME control module connector B, pin 121, and positive crankcase ventilation heater connector, pin 2

Diagnosis/troubleshooting

NOTE:
- The wiring diagnosis proceeds in the DME control module even if the positive crankcase ventilation heater is switched off (i.e. at an external air temperature above 3 °C).
- The positive crankcase ventilation heater is activated continuously if a fault occurs when measuring the external air temperature.