Intermittent fault
Check the electrical terminals on the combustion fan and the control module connector. Check for contact resistance and oxidation.
Check the cable between control module terminal #10 and the signal terminal for the combustion fan (the black lead from the fan). Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground.
Check the cable between control module terminal #11 and the voltage terminal for the combustion fan (the red cable from the fan). Check for an intermittent open-circuit.
Remedy as necessary.
Other information:
- To access the control module or connect the breakout box, see Connecting the breakout box
- To access the 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