DTC Descriptors

DTC B1025 01: Audio Output 1 Left Front Circuit Short to Battery

DTC B1025 02: Audio Output 1 Left Front Circuit Short to Ground

DTC B1025 04: Audio Output 1 Left Front Circuit Open

DTC B1035 01: Audio Output 2 Right Front Circuit Short to Battery

DTC B1035 02: Audio Output 2 Right Front Circuit Short to Ground

DTC B1035 04: Audio Output 2 Right Front Circuit Open

DTC B1045 01:  Audio Output 3 Left Rear Circuit Short to Battery

DTC B1045 02:  Audio Output 3 Left Rear Circuit Short to Ground

DTC B1045 04:  Audio Output 3 Left Rear Circuit Open

DTC B1055 01:  Audio Output 4 Right Rear Circuit Short to Battery

DTC B1055 02:  Audio Output 4 Right Rear Circuit Short to Ground

DTC B1055 04:  Audio Output 4 Right Rear Circuit Open

DTC B1065 01:  Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02:  Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04:  Audio Output 5 Circuit Open (Center IP)

DTC B1075 01:  Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02:  Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1075 04:  Audio Output 6 Circuit Open (Subwoofer)

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Left Front Speaker Signal Circuits (Front Door and Tweeter)	B1025 02	B1025 04	B1025 01	--
Right Front Speaker Signal Circuits (Front Door and Tweeter)	B1035 02	B1035 04	B1035 01	--
Left Midrange Speaker Signal Circuits (Rear Door)	B1045 02	B1045 04	B1045 01	--
Right Midrange Speaker Signal Circuits (Rear Door)	B1055 02	B1055 04	B1055 01	--
Front Center Speaker Signal Circuits (Center IP)	B1065 02	B1065 04	B1065 01	--
Subwoofer Low Level Audio Signal Circuits (Center Rear Shelf)	B1075 02	B1075 04	B1075 01	--

Circuit/System Description

The up-level radio (UQA) supplies 4 channels of audio to an amplifier. The amplifier supplies 6 input signal channels to 8 speakers.

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC

The radio sets a current status for this DTC when a short to ground, short to voltage or an open is detected on any of the 6 speaker channel outputs from the radio.

Action Taken When the DTC Sets

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

Conditions for Clearing the DTC

The fault condition is not present for 0.25 second.

Diagnostic Aids

Speakers located in the front A-pillar are connected to the same channel as the speaker in the door. A DTC will only set after the amplifier only on up-level radios.

Reference Information

Schematic Reference

Radio/Audio System Schematics

Connector End View Reference

Entertainment Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

Circuit/System Verification

All speakers should function properly and make sure the DTC does not reset.

Circuit/System Testing

1. Test the suspect speaker channel, after the amplifier, for a short to ground, short to voltage or an open.

⇒	If a short to ground or voltage can not be found, replace the amplifier.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification Diagnostic Repair Verification Diagnostic Repair Verification after completing the diagnostic procedure.