Driver Information Center (DIC) Switch(es) Inoperative

Driver Information Center (DIC) Switch(es) Inoperative

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview






Circuit/System Description

The driver information center (DIC) switch is a normally open momentary 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 battery positive voltage circuit is fused in the body control module (BCM). The instrument panel cluster (IPC) interfaces with the driver information center (DIC) switch via two discreet circuits. The switch input to the cluster is pulled low or grounded when a switch is activated. The IPC reads the voltage at the analog input to determine which switch input is pressed. The switch input to the cluster is set up in a resistor ladder format. The DIC switch includes the INFO and the SET/RESET switch. A simultaneous press and hold of the INFO and SET/RESET switch activates the MENU switch. The MENU switch is the third embedded switch used to activate the various DIC personalization menu.

Circuit/System Testing

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Driver Information Display Switch Replacement
* Control Module References for IPC replacement, setup and programming