Intermittent fault
Check the control module connector. Check for loose connections. Check for contact resistance and oxidation.
Check the circuit between control module terminal #11 and the components which are connected to the supply circuit (water pump terminal 2, fuel pump (FP) terminal 1 and combustion fan supply terminal). Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground.
Remedy as necessary.
Other information:
- To access the control module or connect the breakout box, see Connecting the breakout box
- To access or replace the water pump, see Water pump engine coolant heater, replacing
- To access or replace the fuel pump (FP):
- For cars manufactured up to w38 2001 inclusive, see Fuel pump, auxiliary heater, replacing
- For cars manufactured from w39 2001 inclusive, see Fuel pump auxiliary heater, replacing .
- To access or replace combustion fan:
- For cars manufactured up to w38 2001 inclusive, see Fuel injection nozzle / fan motor / pressure equalizer, replacing
- For cars manufactured from w39 2001 inclusive, see Fuel injection nozzle / fan motor / pressure equalizer, replacing .
- For other values, see Signal specification
- See Checking wiring and terminals
- Continue
Refer to Information