DTC B1025 RHD
DTC Descriptor
DTC B1025: Speaker CircuitDiagnostic Fault Information
Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information, prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Speaker Circuit | B1025 02 | B1025 04 | B1025 01 | -- |
Circuit/System Description
The telematics system interfaces with the infotainment unit to allow audio to be transmitted via the vehicle speaker system.
Conditions for Running DTC
| • | System voltage is between 9-16 volts. |
| • | Ignition switch is in the ON position. |
Conditions for Setting the DTC
The infotainment unit sets a current status for this DTC when a short to ground, short to voltage or an open/high resistance is detected on the speaker channel output from the telematics module.
Action Taken When DTC Sets
| • | The telematics module sets a DTC. |
| • | The telematics module commands the red LED ON. |
| • | The telematics module disables the audio output to the infotainment unit, producing no sound from the vehicle speakers for the telematics system. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The history DTC will clear after 50 fault-free ignition cycles. |
| • | The DTC can be cleared using a scan tool. |
Circuit/System Verification
Verify customer complaint by adjusting speaker outputs through the infotainment fascia controls, fade and/or balance.
Circuit/System Testing
- Verify no other speaker related DTCs are set as current.
- Ignition OFF, wait for 30 seconds.
- Using the scan tool, select the DTC display function. Verify that DTC B1025 is set as current.
- Disconnect the telematics control module electrical connector.
- If the DTC is set as current, test the left front speaker output (+) circuit for a short to ground, short to voltage or an open/high resistance.
- Test the left front speaker output (-) circuit for a short to ground, short to voltage or an open/high resistance.
- If the vehicle is equipped with Assist Ultra, test the front centre speaker output (+) circuit for a short to ground, short to voltage or an open/high resistance.
- If the vehicle is equipped with Assist Ultra, test the front centre speaker output (-) circuit for a short to ground, short to voltage or an open/high resistance.
| ⇒ | If all circuits test normal, replace the telematics module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for telematics module replacement, setup and programming. |
