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