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.

### Circuit/System Description

The driver information center (DIC) displays important vehicle and entertainment system information. The displayed information includes the ambient air temperature, date, radio and clock. The DIC communicates with other vehicle systems via the serial data circuit.

### Reference Information

#### Schematic Reference

Driver Information System 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 References for scan tool information

### Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the DIC.
2. Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal listed below and ground.

• | Terminal 1

• | Terminal 2

⇒ | If greater than the specified value, test the appropriate ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates when connected between the B+ circuit terminal listed below and ground.

• | Terminal 3

• | Terminal 5

⇒ | If the test lamp does not illuminate, test the appropriate B+ circuit for an open/high resistance. If the circuit tests normal, test or replace the DIC.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for the DIC replacement, setup, and programming.