B1497

Electrically heated rear window, open or short circuit to ground.

Fault symptom
The electrically heated rear window cannot be switched on or off.

Conditions
B1497: Electrically heated rear window, open circuit.
B1498: Electrically heated rear window, short circuit to ground.

Action
1 Press the button for activating the electrically heated rear window on the Automatic Climate Control (ACC) control module panel.
Remove the electrically heated rear window relay and measure the voltage between pin 4 (relay 86) and ground.
The voltage should be about 12 V.
If the value is correct, proceed to point 2.
If the value is incorrect, proceed to point 3.
2 Check the lead between contact 4 (relay 86) and pin 39 on the ACC control module for open/short circuit to ground.
Localize and remedy the fault.
3 Check the lead between connector 5 (relay 85) and ground for open/short circuit to ground.
Localize and remedy the fault.
4 Change the relay.
5 If the fault remains, proceed to "Action Before Changing A Control Module". Before Changing a Control Module