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 59: CD-Player Not RespondingDTC B1245 54: CD-Changer High Temperature
DTC B1245 59: CD-Changer Not Responding
Circuit/System Description
When the ignition is turned ON, the radio performs a self test to verify if any critical malfunction exists within the system.
Conditions for Running the DTC
This DTC test runs when the radio changes from OFF to ON.
Conditions for Setting the DTC
DTC B1240 59, DTC B1245 59
The CD player mechanism does not respond when requested and internal communication attempts time out.
DTC B1245 54
The CD player changer reports that the mechanism is overheating.
Action Taken When the DTC Sets
DTC B1240 59, DTC B1245 59
| • | The radio displays a "CD Error" message temporarily. |
| • | The radio will attempt a communication reset with the CD player mechanism, this will be attempted each time there is an infotainment system source change request. |
DTC B1245 54
| • | The radio displays a "Mechanism Overheat" message temporarily. |
| • | The radio will attempt a communication reset with the CD player mechanism, this will be attempted each time there is an radio source change request. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The history DTC will clear after 50 fault-free ignition cycles. |
Diagnostic Aids
Extended use the CD player, especially in warm weather conditions, may cause this DTC to set in the radio. Under these conditions, it may be normal for this DTC to set to prevent permanent damage to the radio circuitry and no repair should be attempted.
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Description and Operation
Radio/Audio System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Note: Allow the entertainment system to cool if the ambient temperature inside the vehicle is in excess before proceeding with this diagnostic procedure.
- Ignition ON, with a scan tool clear all DTCs.
- Radio ON, play a known good CD and verify B1240 or B1245 does not reset.
| ⇒ | 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, setup, and programming
