B1035

DTC B1025-B1125

Diagnostic Instructions

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

DTC Descriptors

DTC B1025 01
- Audio Output 1 Left Front Circuit Short to Battery (LF Door)

DTC B1025 02
- Audio Output 1 Left Front Circuit Short to Ground (LF Door)

DTC B1025 04
- Audio Output 1 Left Front Circuit Open (LF Door)

DTC B1035 01
- Audio Output 2 Right Front Circuit Short to Battery (RF Door)

DTC B1035 02
- Audio Output 2 Right Front Circuit Short to Ground (RF Door)

DTC B1035 04
- Audio Output 2 Right Front Circuit Open (RF Door)

DTC B1045 01
- Audio Output 3 Left Rear Circuit Short to Battery (LR Door)

DTC B1045 02
- Audio Output 3 Left Rear Circuit Short to Ground (LR Door)

DTC B1045 04
- Audio Output 3 Left Rear Circuit Open (LR Door)

DTC B1055 01
- Audio Output 4 Right Rear Circuit Short to Battery (RR Door)

DTC B1055 02
- Audio Output 4 Right Rear Circuit Short to Ground (RR Door)

DTC B1055 04
- Audio Output 4 Right Rear Circuit Open (RR Door)

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)

DTC B1085 01
- Audio Output 7 Circuit Short to Battery (LR D Pillar)

DTC B1085 02
- Audio Output 7 Circuit Short to Ground (LR D Pillar)

DTC B1085 04
- Audio Output 7 Circuit Open (LR Door)

DTC B1095 01
- Audio Output 8 Circuit Short to Battery (RR Door)

DTC B1095 02
- Audio Output 8 Circuit Short to Ground (RR Door)

DTC B1095 04
- Audio Output 8 Circuit Open (RR Door)

DTC B1105 01
- Audio Output 9 Circuit Short to Battery (LF IP)

DTC B1105 02
- Audio Output 9 Circuit Short to Ground (LF IP)

DTC B1105 04
- Audio Output 9 Circuit Open (LF IP)

DTC B1115 01
- Audio Output 10 Circuit Short to Battery (RF IP)

DTC B1115 02
- Audio Output 10 Circuit Short to Ground (RF IP)

DTC B1115 04
- Audio Output 10 Circuit Open (RF IP)

DTC B1125 01
- Audio Output 11 Circuit Short to Battery (Console Center)

DTC B1125 02
- Audio Output 11 Circuit Short to Ground (Console Center)

DTC B1125 04
- Audio Output 11 Circuit Open (Console Center)

Diagnostic Fault Information






Circuit/System Description

The up-level radio (UQA) supplies 4 channels of audio to an amplifier. The amplifier supplies 10 input signal channels to 11 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.

Circuit/System Verification

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

Circuit/System Testing

Important: The DTC can be set by either the radio or the amplifier. If the DTC was set by the radio, diagnose suspect audio input circuits to the speakers or the amplifier (if equipped). Diagnose audio input signals to the speakers from the amplifier if the DTC was set by the amplifier.

DTC Set In Amplifier
1. With the scan tool, verify the DTC is set by the amplifier.
2. Ignition OFF, disconnect the suspect speaker. Test for 1 to 50 ohms across the speaker terminals.

• If ohms across the speaker are not in the specified range replace the suspect speaker.

3. Test or repair the suspect speaker input circuit for an open short to ground or short to power.

• If all circuits test normal, replace the amplifier.

4. Test the suspect low level audio signal circuit from the radio to the speakers or amplifier, if equipped, for an open short to ground or short to power.

• If all circuits test normal, replace the radio.

DTC Set In Radio
1. With the scan tool, verify the DTC is set by the radio.
2. Test the suspect low level audio signal circuit from the radio to the amplifier for an open short to ground or short to power.

• If all circuits test normal, replace the amplifier.

Repair Instructions

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

* Speaker Replacement Reference
* Control Module References for Amplifier and Radio replacement, setup, and programming