Checking components and wiring
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 open-circuit. Check for a 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 open-circuit.
If no faults are found in the wiring, the combustion fan must be replaced:
- 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 .
NOTE:
Diagnostic trouble code (DTC) CEM-5F3A Water pump, signal and / or diagnostic trouble code (DTC) CEM-5F3F Fuel pump (FP), signal may be stored in the event of a fault in the power cable.
Remedy as necessary.
Other information:
- To access the control module or connect the breakout box, see Connecting the breakout box
- For other values, see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Verification