B1024

DTC B1024 (with Bose GMLAN Amplifier)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC B1024 11
- Circuit Board Temperature Sensor Above Maximum Threshold




Circuit/System Description

The internal amplifier circuitry is monitored for temperature. If the amplifier senses an over-heat condition higher than 100°C of the internal circuitry, the amplifier will shut down until the internal circuitry cools below 95°C (203°F).


Conditions for Running the DTC

The following are conditions that must be present in order for the radio to enable the diagnostics.

* The radio is in ACCESSORY, RUN, or RAP power mode.
* The system voltage is at least 9 volts and no more than 16 volts.



Conditions for Setting the DTC

Amplifier senses an over-heat condition higher than 100°C of the internal circuitry.


Action Taken When the DTC Sets

Amplifier mutes all speaker channels.


Conditions for Clearing the DTC

* The condition must be corrected.
* A history DTC clears after 100 malfunction-free ignition cycles.
* The amplifier receives the clear code command from the scan tool.



Reference Information
Schematic Reference

Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)



Circuit/System Verification

The amplifier should operate normally at a reasonably high volume for an extended period of time.


Circuit/System Testing

Extended use of extremely high volume, especially in warm weather conditions, may induce this DTC. Under these conditions it may be normal for this DTC to set to prevent permanent damage to the amplifier circuitry. If DTC persists without excessive volume, replace the amplifier.


Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning)for audio amplifier replacement, setup, and programming