B12A7

DTC B12A7

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B12A7 39
- Optical Media Drive Internal Electronic Failure

DTC B12A7 45
- Optical Media Drive Build Variant not Programmed

Circuit/System Description

The remote optical drive monitors itself for internal failures and reports its condition to the radio via serial data when in use.

Conditions for Running the DTC

This test runs once per second while the remote optical drive is being accessed.

Conditions for Setting the DTC

B12A7 39

The remote optical drive reports an internal failure via serial data.

B12A7 45

The remote optical drive reports a variant mismatch via serial data.

Action Taken When the DTC Sets

The remote optical drive may be disabled or have limited functionality.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.

* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Radio/Navigation System Schematics Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Radio/Audio System Description and Operation Radio/Audio System

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

B12A7 39

1. Ignition ON.

2. Verify DTC B12A7 39 is not set.

• If DTC B12A7 39 is set
Replace the A33 media disc player.

• If DTC B12A7 39 is not set

3. All OK.

B12A7 45

1. Ignition ON.

2. Verify DTC B12A7 45 is not set.

• If DTC B12A7 45 is set

1. Program/calibrate/setup the A33 media disc player.

2. Verify the DTC does not set.

• If the DTC sets, replace the A33 media disc player.

• If the DTC does not set

3. All OK.

• If DTC B12A7 45 is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Video Disc Player Control Replacement Service and Repair