For 1990-2009 cars

### Diagnostic Instructions

• | 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 provides an overview of each diagnostic category.

### DTC Descriptor

DTC B3622 07: Steering Wheel Controls Signal Circuit

### Circuit/System Description

The body control module (BCM) monitors the signal circuit voltage. If the voltage level is too high, damage may result in the system. When a high voltage condition is detected, the BCM will ignore the switch command.

### Conditions for Running the DTC

Ignition ON.

### Conditions for Setting the DTC

BCM detects voltage above 18.5 volts for 100 msec.

### Action Taken When the DTC Sets

BCM will ignore the switch command.

### Conditions for Clearing the DTC

• | The condition for setting the DTC is no longer present and the DTC is cleared with a scan tool.

• | The BCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive ignition cycles.

### Diagnostic Aids

Test the charging system. Refer to Charging System Test .