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 Descriptor
DTC B1025 01: Audio Output 1 Left Front Circuit Short to BatteryDTC B1025 02:: Audio Output 1 Left Front Circuit Short to Ground
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 B1045 01:: Audio Output 3 Left Rear Circuit Short to Battery
DTC B1045 02:: Audio Output 3 Left Rear Circuit Short to Ground
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 B1065 01:: Audio Output 5 Circuit Short to Battery (Center I/P)
DTC B1065 02:: Audio Output 5 Circuit Short to Ground (Center I/P)
DTC B1075 01:: Audio Output 6 Circuit Short to Battery (Subwoofer)
DTC B1075 02:: Audio Output 6 Circuit Short to Ground (Subwoofer)
Circuit | Short to Ground | Short to Voltage |
Left Front Speaker Signal Circuits | B1025 02 | B1025 01 |
Right Front Speaker Signal Circuits | B1035 02 | B1035 01 |
Left Rear Speaker Signal Circuits | B1045 02 | B1045 01 |
Right Rear Speaker Signal Circuits | B1055 02 | B1055 01 |
Front Center Speaker Signal Circuits | B1065 02 | B1065 01 |
Subwoofer Speaker Signal Circuits | B1075 02 | B1075 01 |
Circuit/System Description
The navigation radio supplies 6 channels of audio signals to an amplifier. The amplifier supplies 15 output signal channels to 15 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 battery is detected on any of the audio output circuits from the navigation 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.
Reference Information
Schematic Reference
Connector End View Reference
Entertainment/Communication Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- With the scan tool, first verify the DTC is set by the amplifier.
- Test the radio audio output circuit for a short to ground or short to power.
Important:: It is recommended that Component Testing is performed before Circuit Testing when diagnosing speaker circuits.
If the DTC was set by the amplifier, test the suspect speaker circuit for a short to ground or short to power.
If all circuits test normal, replace the amplifier.
If all circuits test normal, replace the navigation radio
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | For the speaker replacement, refer to Speaker Replacement Reference. |
| • | For audio amplifier and navigation radio replacement, setup and programming, refer to Control Module References. |
