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 Initial Inspection and Diagnostic Overview

Circuit/System Description

The driver information center (DIC) switch is a multiplexed 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 switch input to the DIC is pulled low or grounded when a switch is activated. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - SET/RESET, GAGES, TRIP ODOMETER, SET/RESET, INFO, FUEL - corresponds to a certain resistance value.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the driver information center (DIC).
2. Ignition OFF, test for less than 1 ohm of resistance between the DIC ground circuit and ground.

• If greater than 1 ohm, test the ground reference circuit for an open/high resistance.

3. Ignition ON, verify that all scan tool DIC Switch parameters are Inactive.

• If all DIC switch parameters are not Inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC).

4. Ignition ON, install a 3-Amp fused jumper wire between the signal circuit and the ground reference circuit. Verify that all scan tool DIC switch parameters are Active.

• If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.

5. If all circuits test normal, test or replace the DIC switch.

Repair Instructions

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

* Driver Information Display Switch Replacement
* Refer to Programming and Relearning for the IPC replacement, setup and programming. Programming and Relearning