Pinpoint Test 10: The Steering Wheel Controls Are Inoperative/Do Not Operate Correctly

PINPOINT TEST 10: THE STEERING WHEEL CONTROLS ARE INOPERATIVE/DO NOT OPERATE CORRECTLY

Normal Operation

The steering wheel controls consist of the following switches:

- VOL-, VOL+, SEEK-, SEEK+, VOICE, MEDIAVoltage is sent from the audio control module (ACM) to the steering wheel controls, and the ACM grounds the return circuit. The VOL-, VOL+, SEEK-, SEEK+, and MEDIA switches share signal and return circuits, while the VOICE switch uses a separate pair of circuits.When a switch is pressed, the voltage is routed through a specific resistor value for each function. The ACM then uses the reference voltage to determine which control input function has been selected.

- DTC B11BA:1C (Steering Wheel Audio Switch Pack: Circuit Voltage Out of Range) - set by the ACM when the reference voltage to the steering wheel controls is out-of-range. This can be caused by a number of different failures on the steering wheel controls circuit except for a stuck switch or a short to ground in the return circuit. This DTC applies to the VOL-, VOL+, SEEK-, SEEK+, and MEDIA switches.
- DTC B113BA:63 (Steering Wheel Audio Switch Pack: Circuit / Component Protection Time-Out) - set by the navigation ACM when a steering wheel control switch is detected as active for more than 120 seconds during normal operation, or for more than 3 seconds during the self-test. A short to ground on the return circuit should not set this DTC, as the reference voltage would fall out-of-range, resulting in DTC B11BA:1C being set. This DTC applies to the VOL-, VOL+, SEEK-, SEEK+, and MEDIA switches.
- DTC B1201:1C (Steering Wheel Audio Switch Pack 2: Circuit Voltage Out of Range) - set by the ACM when the reference voltage to the steering wheel controls is out-of-range. This can be caused by a number of different failures on the steering wheel controls circuit except for a stuck switch or a short to ground on the return circuit. This DTC applies to the VOICE switch.
- DTC B1201:63 (Steering Wheel Audio Switch Pack 2: Circuit / Component Protection Time-Out) - set by the ACM when a steering wheel control switch is detected as active for more than 120 seconds during normal operation, or for any duration during the self-test. A short to ground on the return circuit should not set this DTC, as the reference voltage would fall out-of-range, resulting in DTC B1201:1C being set. This DTC applies to the VOICE switch.

Possible Causes
- Wiring, terminals or connectors
- Clockspring
- Steering wheel controls
- ACM

Diagnostic Procedure

Step 1-Step 3:

Step 4-Step 5:

Step 6:

Step 7:

Step 8: