Checking components and wiring
Check the electrical terminal for the glow plug and the combustion preheater module (CPM) connector. Check for contact resistance and oxidation. Check for damage in particular.
Check the cable between combustion preheater module (CPM) terminal #1 and the glow plug terminal. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Replace the glow plug if no fault is 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 Glow plugs, engine coolant heater, replacing
- For cars manufactured from w39 2001 inclusive, see Replacing the glow plugs of the engine coolant heater .
- See Checking wiring and terminals
- Continue
Refer to Verification
Check the electrical terminal for the glow plug and the combustion preheater module (CPM) connector. Check for contact resistance and oxidation. Check for loose connections.
Check the cable between combustion preheater module (CPM) terminal #1 and the glow plug terminal. Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground. Check for an intermittent short-circuit to supply voltage.
Remedy as necessary.
Other information
- See Connecting the breakout box
- See Signal specification
- For cars manufactured up to w38 2001 inclusive, see Glow plugs, engine coolant heater, replacing
- For cars manufactured from w39 2001 inclusive, see Replacing the glow plugs of the engine coolant heater .
- See Checking wiring and terminals
- Continue
Refer to Verification