B1424

Read the instructions below then start the fault diagnostic procedure.

Symptom: Poor heating of cabin Heater stops if running Heater does not start

B1424

Fault symptoms

Poor heating of cabin

Heater stops if running

Heater does not start

Conditions

Heater running.

The power supply is less than 10.2 V for 25 seconds.

Diagnostic help

The power supply to the heater can be read with the diagnostic tool.

The heater has an extra cable and connector that is separate from the ordinary wiring on the heater. This cable and connector are not used but are connected to the control module. Therefore, check that this cable is undamaged before starting fault diagnosis.

The ordinary wiring between the heater and the 8-pin connector contains an additional light-green wire that is cut and not used.