B1025

DTC B1025

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

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

Steps 1-6:

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