• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provide an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
B+ Voltage Reference | 1 | 1 | 1 | -- |
10-Volt Reference | 1 | 1 | 1 | -- |
Steering Wheel Control Switch Signal | 1 | 1 | 1 | -- |
Steering Wheel Control Switch 2 Signal | B3624 | 1 | 1 | B3624 |
1. Steering Wheel Controls Inoperative |
The body control module (BCM) supplies voltage to the MUTE/SEEK + multiple momentary contact switch and monitors the steering wheel control switch 2 signal circuit. Each switch state is associated with a set resistance value and when the switch is pressed, a specific voltage drops across the resistor unique to that switch.
• | Battery voltage is between 9-16 volts |
• | The ignition is ON. |
• | The BCM detects a short to ground on the steering wheel controls 2 signal circuit. |
• | The steering wheel controls 2 signal circuit remains in the same state for 1 minute. |
The MUTE/SEEK + switch remains in the last selected position.
• | The conditions for setting the DTC are no longer present. |
• | A history DTC clears after 100 malfunction-free ignition cycles. |
This diagnostic is for the audio steering wheel controls for vehicles not equipped with RPO K59 adaptive cruise.
Steering Wheel Secondary/Configurable Control Schematics
Steering Wheel Controls Description and Operation
Control Module References for scan tool information
⇒ | If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If less than the specified value, test the signal circuit for a short to ground. |
⇒ | If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the right steering wheel control switch. |
Function Switch | Minimum Resistance Value | Maximum Resistance Value |
---|---|---|
Seek | 1.9k Ohms | 2.1k Ohms |
Mute | 4.9k Ohms | 5.1k Ohms |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |