Intermittent fault
Check the control module connector and the electrical terminal for the glow plug. Check for loose connections. See Loose connections (terminals) . Check for contact resistance and oxidation. See Contact resistance and oxidation .
Check the cable between control module 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:
- To access the control module or connect the breakout box, see Connecting the breakout box
- To access the glow plug:
- 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 .
- With the ignition on and the glow plug electrical terminal disconnected, the voltage between the glow plug electrical terminal (control module side) and ground must be approximately 9 V
- For other values, see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Information