Circuit Description
The body control module (BCM) monitors the steering wheel controls 2 switch signal circuit to determine the function. The MUTE/SEEK UP switch consists of a momentary contact switch that connects a series of resistors. Each switch selection corresponds to a specific resistance value. The BCM determines the switch selection by the voltage drop across the resistor. The BCM sets DTC B3624 when it detects a stuck MUTE/SEEK UP switch.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B3624 Steering Wheel Controls Entertainment Signal 2 Circuit
Conditions for Running the DTC
Ignition is in RUN.
Conditions for Setting the DTC
Steering wheel controls 2 signal circuit remains in the same state for 1 minute
Action Taken When the DTC Sets
MUTE/SEEK UP switch remains in the last selected position
Conditions for Clearing the MIL/DTC
| • | The DTC becomes history when the fault is no longer present. |
| • | A History DTC clears after 100 malfunction free ignition cycles. |
| • | The BCM module receives a clear code command from the scan tool. |
Diagnostic Aids
Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference : Steering Wheel Controls Schematics Connector End View Reference: Entertainment Connector End Views or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the scan tool indicate Up when SEEK UP is selected and Down when MUTE is selected? | -- | Go to Diagnostic Aids | Go to Step 3 |
3 |
Does the test light illuminate? | -- | Go to Step 4 | Go to Step 5 |
4 | Test the steering wheel controls 2 signal circuit for a short to battery. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 6 |
5 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the steering wheel control switch assembly. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 |
7 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement? | -- | Go to Step 9 | -- |
8 | Replace the steering wheel control switch assembly. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column. Did you complete the replacement? | -- | Go to Step 9 | -- |
9 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
