Test F: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly

PINPOINT TEST F: THE STEERING WHEEL CONTROLS ARE INOPERATIVE/DO NOT OPERATE CORRECTLY

F1-F3:

F3-F5:

F6-F7:

Normal Operation
Voltage is sent from the audio unit to the steering wheel controls through circuit VME14 (GY/YE or VT). When a switch is pressed, the voltage is routed through a specific resistor value for each function. The audio unit receives this reference voltage through circuit RME24 (BU/WH or RD/WH). The audio unit then uses this reference voltage to determine which control input function has been selected.

DTC B1117 - sets when a steering wheel control button is detected as active for greater than 120 seconds during normal operation, or for any duration during the self-test.

DTC B1136 - sets when the return voltage from the steering wheel controls is out-of-range. This can be caused by any failure on the steering wheel controls circuit.

DTC B2404 - sets when the return voltage from the steering wheel controls is out-of-range. This can be caused by any failure on the steering wheel controls circuit.

Possible Causes
- Circuit RME24 (BU/WH or RD/WH) open, short to ground or voltage
- Circuit VME14 (GY/YE or VT) open, short to ground or voltage
- Clockspring
- Steering wheel controls
- Audio unit