Intermittent fault
Check the cable between control module terminal #10 and the signal terminal for the combustion fan (the black lead from the fan). Check for a short-circuit to supply voltage. See Short-circuit to ground, intermittent faults .
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 .
- With the ignition on and the signal terminal for the combustion fan disconnected, the voltage between the signal terminal for the combustion fan (control module side) and ground must be approximately 0 V
- For other values, see Signal specification .
- Continue
Refer to Information