B1805

CIRCUIT DESCRIPTION
Normal vehicle Class 2 communication does not begin until the system power mode has been identified. The dash integration module (DIM) monitors tour 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 DTC
The power moding malfunction 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:

Steps 9-14:

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.