Radio, Stereo, and Compact Disc

DTC 11

CIRCUIT DESCRIPTION
Control buttons located on the steering wheel provide remote operation of various audio system functions. The remote controls constitute a resistive network. When a button is pressed, the change in resistance is interpreted by the radio as a button press and the appropriate function is actioned.

CONDITIONS FOR SETTING THE DTC
With the ignition in either the Accessories position or the On position, DTC 11 will set if a steering wheel control button remains pressed or stuck for more than 30 seconds.

TEST DESCRIPTION

Step 1 - 7:

Step 8 - 12:

The numbers below refer to the step numbers on the diagnostic table.
2. Tests for proper operation of the steering wheel radio control buttons.
3. Uses the scan tool data list to check the state of the steering wheel control buttons.
5. Tests for correct resistance range of the steering wheel radio control circuit.
7. Tests the steering wheel radio control circuit for a short to ground.