Circuit Description

Normal class 2 communication does not begin until system power mode has been identified. Dash Integration Module (DIM) monitors four discrete wires from ignition switch contacts to determine present power mode (ignition switch position). DIM communicates system power mode to all class 2 modules along class 2 serial data line.

DTC will set if one of four monitored ignition switch circuits has malfunctioned. When DTC is set, DIM implements default actions for each ignition switch position. For DTC to clear, power moding malfunction must be corrected.