Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | 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 BatteryDTC 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
Diagnostic Fault Information
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 | -- |
Circuit/System Description
For the lower level radios the DTC will set only if the short or open condition is on the speaker output circuits of the radio,
The up-level radio (UQA) supplies 4 channels of audio to an amplifier. The amplifier supplies 4 input signal channels to 6 speakers.
On some up-level radios the DTC may also set if the short or open condition is on the output of the amplifier.
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 4 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 seconds.
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
Connector End View Reference
Entertainment Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
All speakers should function properly and make sure the DTC does not reset.
Circuit/System Testing
Test the suspect speaker channel between the radio and the speakers (or amplifier if equipped) for a short to ground, short to voltage or an open.
| ⇒ | If a short to ground or voltage can not be found, test or replace the radio. |
| ⇒ | If a short to ground or voltage can not be found, test or replace the amplifier. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for radio replacement, setup, and programming |
