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.

### DTC Descriptor

DTC B1023 08: Key Stuck

### Circuit/System Description

The radio monitors each of the buttons located on the radio face during normal operation.

### Conditions for Running the DTC

Ignition ON.

### Conditions for Setting the DTC

The radio detects that a button on the radio is stuck.

### Action Taken When the DTC Sets

Operations from the stuck button will be ignored.

### Conditions for Clearing the DTC

• | A current DTC will clear when the radio detects that the button is no longer stuck.

• | A history DTC will clear after 100 malfunction free ignition cycles.

### Reference Information

#### Schematic Reference

Radio/Navigation System Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Radio/Audio System 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 Verification

Ignition ON, verify DTC B1023 is not set.

⇒ | If the DTC is set, clear the DTC. If the DTC resets, replace the radio.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for radio replacement, programming, and setup