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B1498

Symptom: The heated rear window cannot be switched on or off.

B1498

Electrically heated rear window, shorted to ground



Fault symptom:

The heated rear window cannot be switched on or off.

Conditions

Control module output pin 39 shorted to ground.

Diagnostic procedure


1. Connect ISAT and give the command "ELECTRICALLY HEATED REAR WINDOW" in the "ACTIVATE" menu. This command sends Batt + from pin 39 on the ACC control module to ICE and then check on pin 31 whether the electrically heated rear window is activated or not. ISAT will not move "*" if the electrically heated rear window is not activated. If this works, clear the diagnostic trouble code and check that it is not generated afresh.

2. Contact ICE with the ISAT and activate "HEATED REAR WINDOW" in the "ACTIVATE RELAY" menu. Check that the symbol for the heated rear window in the ACC panel's display lights up and goes out when the command is executed.


3. Check the wiring between pin 39 of the ACC control module and pin 66 of the ICE control module for shorting to ground. Locate the fault and rectify it.