For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
DIC Switch Signal Circuit | 1 | 1 | 1 | --
DIC Switch Ground Reference Circuit | -- | 1 | 1 | --
1. Driver Information Center (DIC) Switch Malfunction

### Circuit/System Description

The driver information center (DIC) switch are normally open momentary switch. The instrument panel cluster (IPC) interfaces with the driver information center (DIC) switch(es) via a discreet circuit. The DIC switch signal circuit is pulled up to battery voltage in the IPC. 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 is pressed. The switch input to the cluster is set up in a resistor ladder format. The DIC switch include the INFO and the SET/RESET switches. 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 menus.

### Reference Information

#### Schematic Reference

Instrument Cluster Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Driver Information Center (DIC) Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module Referencesfor scan tool information

### Circuit/System Verification

Ignition ON, verify that when the DIC switches are pressed and released the DIC switch scan tool parameters toggle between Active and Inactive.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch.
2. Ignition OFF, test for less than 5 ohms between the ground circuit terminal 7 and ground.

⇒ | If greater than the specified range, test the ground circuit for a short to voltage or an open/high resistance.

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

⇒ | If any DIC switch parameters are not Inactive, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC).

4. Ignition ON, install a 3-A fused jumper wire between the signal circuit terminal 1 and ground. Verify that all scan tool DIC switch parameters are Active.

⇒ | If any is 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.

• | Steering Wheel Control Switch Assembly Replacement

• | Control Module References for the IPC replacement, setup, and programming