B2810

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
This test is run every 300 milliseconds.

CONDITIONS FOR SETTING THE DTC
The switch must be stuck, pressed, for at least 30 seconds.

ACTION TAKEN WHEN THE DTC SETS
The DIM will ignore the switch command.

CONDITIONS FOR CLEARING THE MIL/DTC
The stuck switch condition must be corrected.

DIAGNOSTIC AIDS
^ The following may cause an intermittent:
- A bent terminal
- A backed out terminal
- A damaged terminal
- Poor terminal tension
- A chafed wire
- A broken wire inside the insulation
^ When diagnosing for an intermittent short or an open, massage the wire harness while watching the test equipment for changes.

TEST DESCRIPTION

Steps 1-4:

The number below refers to the step number on the diagnostic table.
2. This step verifies that the steering wheel convenience switch is stuck. The convenience switches operate in the 123-247 count range. The value given is the normal condition that exists when no switch is activated.