Checking components and wiring
Check the cable between control module terminal #8 and the signal cable for the flame sensor. Check for a short-circuit to ground.
HINT: It is difficult to differentiate between the ground lead for the flame sensor and the signal cable. Take readings on one cable at a time to check for a relevant value on either of them.
Replace the flame sensor if no fault is found in the cable.
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 .
- Continue
Refer to Verification