Checking components and wiring
Check the cable between combustion preheater module (CPM) terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage.
With the ignition on and the fuel pump (FP) connector disconnected, the voltage between fuel pump (FP) terminal 2 (control module side) and ground must be 0 V.
The fuel pump (FP) must be replaced if no faults are found in the cable.
Remedy as necessary.
Other information
- See Connecting the breakout box
- See Signal specification
- 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 .
- See Checking wiring and terminals
- Continue
Refer to Verification
Check the cable between combustion preheater module (CPM) terminal #13 and fuel pump (FP) terminal 2. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- See Connecting the breakout box
- 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 .
- See Signal specification
- See Checking wiring and terminals
- Continue
Refer to Verification