Intermittent fault
Check the control module connector. Check for contact resistance and oxidation.
Check the flame sensor circuit. Check for an intermittent open-circuit.
Check the cable between control module terminal #8 and the signal terminal for the flame sensor. 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 or replace the flame sensor:
- For cars manufactured up to w38 2001 inclusive, see Overheat protection thermostat / flame sensor / engine coolant temperature sensor, replacing
- For cars manufactured from w39 2001 inclusive, see Replacing the overheat protection thermostat, the flame sensor and the engine coolant temperature sensor .
- For other values, see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Information