B1055

DTC B1025, B1035, B1045, or B1055

Circuit Description

When the radio is powered up, the radio supplies low level audio signals to the speakers. If the vehicle is equipped with an audio amplifier, the amplifier will boost the signal sent to the speakers. The radio tests the speaker output circuits for a short to voltage or ground.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

* DTC B1025 Audio Output 1 (Left Front) Circuit
* DTC B1035 Audio Output 2 (Right Front) Circuit
* DTC B1045 Audio Output 3 (Left Rear) Circuit
* DTC B1055 Audio Output 4 (Right Rear) Circuit

Conditions for Running the DTC

The test is performed when the radio switches from OFF to ON. The radio will continue to test for the fault once every 0.5 seconds.

Conditions for Setting the DTC

The radio sets a current status for this DTC when a short to ground or voltage is detected on any of the speaker channels for 1.5 seconds.

Action Taken When the DTC Sets

No sound is present from one or more of the speakers.

Conditions for Clearing the DTC

The condition is no longer present for 5 seconds.

Test Description

Step 1 - Step 6:

The number below refers to the step number on the diagnostic table.
2. The DTC descriptor indicates which speaker output circuit set the DTC.