B2512

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 DIM receives a value that is not within the resistance value range.

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

CONDITIONS FOR CLEARING THE MIL/DTC
The 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 1-6:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the resistance is not within the specified range. The switches operate in the 19-247 count range. The value given is the normal condition that exists when no switch is activated.