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 B1240 00: CD Mechanism Malfunction

### Circuit/System Description

The radio monitors the CD mechanism for any errors or malfunctions during operation.

### Conditions for Running the DTC

This test runs continuously.

### Conditions for Setting the DTC

A malfunction is detected in the CD mechnaism.

### Action Taken When the DTC Sets

CD operation will be disabled.

### Conditions for Clearing the DTC

The DTC will clear when a CD mechanism malfunction is no longer detected.

### 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

1. Ignition ON, with a scan tool clear all DTCs.
2. Radio ON, play a known good CD. Eject and reinsert the CD several times.

⇒ | 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