Flame monitor
â–¶ How to fix
Check the flame monitor. Measurement points 15 and 16 in the connector to the auxiliary heater control unit. Resistance value: 650 kOhm at -25 °C 1100 kOhm at +25 °C. Check the fuel supply. Check that the exhaust pipe is not blocked. Check the combustion chamber. Check the glow plug. Measurement points 2 and 7 in the connector to the auxiliary heater control unit. Resistance value: 2 Ohms.
What you'll see
No driver-visible symptom recorded.
System reaction
The fault code is set if the flame disappears 2 times within 40 minutes.
Diagnostic depth
Detection
The flame disappears in the LOW position.
Possible cause
The flame disappears when the temperature falls below 90°C and the auxiliary heater is in the LOW operating mode.