B2510

CIRCUIT DESCRIPTION
The steering wheel controls are simple momentary contact switches that connect a series of resistors so that each switch selection corresponds to a fixed resistance value. The dash integration module (DIM) determines which switch has been pressed by the voltage drop across the corresponding resistance value.

CONDITIONS FOR RUNNING THE DTC
The DIM must be powered.

CONDITIONS FOR SETTING THE DTC
One of the left steering wheel control switches must be active (stuck) for at least 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
The DIM will disable only the temperature and blower switches while the fault is present.

CONDITIONS FOR CLEARING THE DTC
^ The DTC will become history if the DIM no longer detects a failure.
^ The history DTC will clear after 50 fault free ignition cycles.
^ The DTC can be cleared with a scan tool.

DIAGNOSTIC AIDS




Refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-4:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that one of the HVAC switches of the left steering wheel controls is active. The value given is the normal condition that exists when no switch is activated.