Test G: The Auxiliary Audio Control Is Inoperative/Does Not Operate Correctly - Steering Wheel Controls

PINPOINT TEST G: THE AUXILIARY AUDIO CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - STEERING WHEEL CONTROLS

G1-G2:

G2-G3:

G4-G6:

Normal Operation
The steering wheel controls consist of a specific resistor value for each button function creating a voltage divider. When a button is pressed, a specific reference voltage is sent to the audio unit. The audio unit then uses this reference voltage to determine which control input function has been selected. Circuit 595 (LB/RD) is the reference voltage circuit between the steering wheel controls and the audio unit. Ground for the steering wheel controls is provided through circuit 1203 (BK/LB).

Possible Causes
- Circuit 595 (LB/RD) open or short to ground
- Circuit 1203 (BK/LB) open
- Steering wheel controls
- Clockspring
- Audio unit