B1422

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
Normal vehicle Class 2 communication does not begin until the system power mode has been identified The dash integration module (DIM) monitors four discrete wires from the ignition switch contacts 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 line.

CONDITIONS FOR RUNNING THE DTC
The DIM must be powered.

CONDITIONS FOR SETTING THE DTC
One of the four 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
To diagnose for an intermittent short or an open, refer to Testing for Intermittent and Poor Connections in Diagrams.

TEST DESCRIPTION
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.