B1422

CIRCUIT DESCRIPTION
Normal vehicle Class 2 communications will not commence until the system power mode has been identified. Four discrete wires from the ignition switch contacts are monitored by the dash integration module (DIM) in order to determine the present power mode (ignition switch position). The DIM communicates the system power mode to all Class 2 modules on the Class 2 serial data circuit.

CONDITIONS FOR SETTING THE DTC
One of the tour monitored ignition switch circuits has malfunctioned.

ACTION TAKEN WHEN THE DTC SETS
The DIM implements default actions for each ignition switch position when faults are detected.

CONDITIONS FOR CLEARING THE MIL/DTC
The power moding malfunction must be corrected.

DIAGNOSTIC AIDS

Device Power Moding:

To diagnose for an intermittent short or an open, refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION

Steps 1-6:

Steps 7-14:

The numbers below refer to the step numbers on the diagnostic table.
7. This step determines if the ignition switch is the source of the short to voltage.