B0438

Read the instructions below then start the fault diagnostic procedure.

Symptom: Poor heating of cabin Stop the heater if it is in use Heater does not start

B0438

Fault symptom

Poor heating of cabin

Stop the heater if it is in use

Heater does not start

Conditions

Heater is activated.

Resistance in the glow plug circuit is below 30 mohm for 100 ms.

Diagnostic help

The output from the control module can be activated using the diagnostics tool.

The heater is provided with extra cabling and connector which is isolated from the ordinary cabling from the heater. This cabling and connector is not used but is connected to the control module, therefore always check that this cabling is undamaged before beginning fault tracing.

In the ordinary cabling between the heater and the 8-pin connector, there is an extra light green lead that is cut and is not used.