Driver Information Center (DIC) Switch(es) Inoperative

DRIVER INFORMATION CENTER (DIC) SWITCH(ES) INOPERATIVE




DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle . Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The driver information center (DIC) switch is a multiplexed switch that functions as a DIC/Dimmer switch. Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a ground reference. The switch input to the cluster is pulled low or grounded when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - SET/RESET, FUEL INFO, DIC INFO, PERSONALIZATION- corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors. A stuck switch or a short to battery sets a DTC.

CIRCUIT/SYSTEM TESTING
1. With the ignition ON, install a scan tool.
2. Activate and release each of the DIC switches.
3. With the scan tool observe the DIC information switch parameters in the IPC scan tool Data List.
- If the test lamp does not illuminate, check the DIC switch ignition 1 voltage circuit for an open or a high resistance.
4. Connect a test lamp between the DIC switch ignition 1 voltage circuit and the DIC switch ground circuit.
- If the test lamp does not illuminate, check the DIC switch ground circuit for an open or a high resistance.
- If the test lamp does illuminate, check the DIC switch signal circuits for an open or a high resistance.
- If the DIC switch signal circuits tests normal, replace the DIC switch.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Driver Information Center Switch Replacement.