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B1422

Symptom: The temperature sensor always indicates a cold engine.

B1422

Engine coolant temperature sensor shorted to battery positive


Fault symptom

The temperature sensor always indicates a cold engine.



Conditions

B1422: The PWM output for controlling the engine temperature gauge in main instrument display panel 1 is short-circuited to battery positive.

Diagnostic procedure


1. Check that no diagnostic trouble codes are stored in the main instrument display panel. If trouble code are present, see Service Manual 3:5 "Electrical system, Main instrument display panel" .

2. Connect a BOB and check the wiring for a short circuit to (+) between:


• ICE module connector pin 61 and pin 4 of the main instrument display panel 1 connector.

• ICE module connector pin 14 and pin 7 of the main instrument display panel 2 connector.

3. Clear the diagnostic trouble code, start the engine and check that the trouble code is not generated afresh.


4. If the trouble code is generated afresh, proceed to .