B3622

DTC B3622
DTC Descriptor
DTC B3622 07
Steering Wheel Controls Signal Circuit

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

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. Charging System Test
^ This diagnostic is for the audio steering wheel controls.
^ Before diagnosis of the steering wheel controls, ensure the primary controls of the associated component are functioning properly.
^ Review schematic when testing switch resistance values.