B1025

DTC B1025-B1095

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 provide an overview of each diagnostic category.

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






Circuit/System Description

The radio supplies low level audio to the speakers or the amplifier (if equipped).

Conditions for Running the DTC

The radio is ON.

Conditions for Setting the DTC

Set by Radio

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 4 speaker channel outputs from the radio.

Set by Bose Amplifier

The DTC will not set during normal amplifier operation. The vehicle must have the ignition OFF for several hours and the fault must be present during amplifier power-up.

Action Taken When the DTC Sets

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

Conditions for Clearing the DTC

Set by Radio

The fault condition becomes history if not present for 0.25 seconds.

Set by Bose Amplifier

The fault condition becomes history after the vehicle ignition has been OFF for several hours and then the ignition turns ON.

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

Set by Radio

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

Circuit/System Testing

With Amplifier
1. With the scan tool, verify the DTC is set by the radio.
2. Disconnect the suspect audio amplifier harness connector.
3. Disconnect the radio harness connector.
4. Test for less than 1 volt on both of the suspect low level audio signal circuits.

• If greater than 1 volt repair short to voltage.

5. Test for infinite resistance between both low level audio signal circuits and ground.

• If less than specified value, repair short to ground.

6. Test for less than 1 ohm between the suspect low level audio signal circuits amplifier harness connector and the suspect speaker harness connector.

• If greater than specified value repair open or high resistance.

• If all circuits test normal, replace the amplifier.

Without Amplifier
1. With the scan tool, verify the DTC is set by the radio.
2. Ignition OFF, disconnect the suspect speaker. Test for 1-50 ohms across the suspect speaker terminals.

• If not within the specified range specified range replace the suspect speaker.

3. Disconnect the suspect radio harness connector.
4. Test for less than 1 volt on both of the low level audio signal circuits.

• If greater than 1 volt repair short to voltage.

5. Test for infinite resistance between both of the suspect low level audio signal circuits and ground.

• If resistance is less than specified value, repair short to ground.

6. Test for less than 1 ohm between the suspect speaker harness connector both low level audio signal circuits and the suspect radio harness connector.

• If greater than specified value repair open or high resistance.

• If all circuits test normal, replace the radio.

Repair Instructions

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

* Speaker Replacement Reference