Buick Regal: DTC B1265
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.
- Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
DTC Descriptor
DTC B1265
Entertainment System Remote Enable Circuit
For symptom byte information refer to Symptom Byte List.
Diagnostic Fault Information
1. all components requiring remote enable inoperative
2. components will not power off with infotainment system
Circuit/System Description
When the radio is on, a discrete 12 V signal is supplied on the entertainment
remote enable circuit to the
Active Noise Cancellation Module / Audio Amplifier. This signal is used to
control the power state of
the component.
Conditions for Running the DTC
- The radio is ON.
- The system voltage is 9 - 16 V
Conditions for Setting the DTC
- The radio detects an open, short to ground or short to voltage on the
entertainment remote enable
circuit.
- The above condition is present for greater than 250 mS.
Action Taken When the DTC Sets
- The radio implements a current limiting mode and disables the output on
the entertainment remote
enable circuit.
- All components connected on the entertainment remote enable circuit will
be inoperative.
Conditions for Clearing the DTC
- The condition for setting the DTC no longer exists.
- After the ignition has been OFF for a sufficient amount of time to allow
the radio to enter a low
power/sleep state, the radio will re-enable the output on the following
ignition cycle and the DTC
will become history.
- A history DTC clears after 50 malfunction-free ignition cycles.
Diagnostic Aids
- This DTC may be stored as a history DTC without affecting the operation
of the
radio/infotainment systems.
- The radio's current limiting logic may not re-enable the output on the
entertainment remote enable
circuit until after the radio performs a full power - down. It may be
necessary to wait 5 minutes
between each test attempt with the key OFF and retained accessory power OFF.
Reference Information
Schematic Reference
Radio/Navigation System Wiring Schematics (IOB) , Radio/Navigation System
Wiring Schematics
(IOR) or Radio/Navigation System Wiring Schematics (IO5/IO6) , or
Radio/Navigation System
Wiring Schematics (IOS/IOT).
Connector End View Reference
Component Connector End View Index
Description and Operation
Radio/Audio System Description and Operation (IO6) , Radio/Audio System
Description and Operation (IOB) , or Radio/Audio System Description and
Operation (IOS/IOT/IOU).
Electrical Information Reference
- Refer to Circuit Testing
- Refer to Connector Repairs
- Refer to Testing for Intermittent Conditions and Poor Connections
- Refer to Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Testing
1. Ignition OFF, radio OFF. It may take up to 2 min for all vehicle systems
to power down.
2. Disconnect the X1 harness connector at the K108 Active Noise Cancellation
Module / T3 Audio
Amplifier.
3. Test for less than 10 Ω between the ground circuit terminal 8 and ground.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground
connection.
- Go to next step: If less than 10 Ω
4. Ignition ON, A11 Radio ON.
5. Verify that a test lamp illuminates between the control circuit terminal 3
and ground.
- If test lamp does not illuminate
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- Go to next step: If infinite resistance
- Test for less than 2 Ω in the control circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, replace the A11 Radio.
- Go to next step: If test lamp illuminates
6. Ignition OFF, radio OFF. It may take up to 2 min for all vehicle systems
to power down.
7. Test for less than 1 V between the control circuit terminal 3 and ground.
- Disconnect the harness connector at the A11 Radio, ignition ON.
- Test for less than 1 V between the control circuit and ground.
- If greater than 1 V, repair the short to voltage on the circuit.
- If less than 1 V, replace the A11 Radio.
- Go to next step: If less than 1 V
8. Test or replace the K108 Active Noise Cancellation Module / T3 Audio
Amplifier.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for radio and active noise cancellation module
replacement, programming,
and setup.
DTC B126A
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.
- Refer to Diagnostic Procedure Instructions for an overview of each
diagnostic category.
DTC Descriptor
DTC B126A 00
Internet Application Download Performance.
Symptom Byte List
Circuit/System Description
The term application refers to any piece of software that works on a system
(hardware) that is being
operated by its own software. Applications are typically small software programs
which uses the
hardware to perform a specific task, as opposed to operating the entire system.
Applications can be
initiated by the user or the Auto Start feature.
Conditions for Running the DTC
This DTC test runs during active Internet applications.
Conditions for Setting the DTC
The HMI Module has detected 3 consecutive resets of an Internet application.
Action Taken When the DTC Sets
The HMI Module prevents the Internet Application Auto Start feature
Conditions for Clearing the DTC
The DTC will clear when the fault is no longer present.
Diagnostic Aids
This DTC indicates an issue with the Internet Application and not the HMI
Module.
Reference Information
Description and Operation
Radio/Audio System Description and Operation (IO6) , Radio/Audio System
Description and Operation (IOB) , or Radio/Audio System Description and
Operation (IOS/IOT/IOU).
Connector End View Reference
Component Connector End View Index
Electrical Information Reference
- Refer to Circuit Testing
- Refer to Connector Repairs
- Refer to Testing for Intermittent Conditions and Poor Connections
- Refer to Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, A11 Radio ON.
2. Verify DTC B126A is not set.
Delete all applications loaded on the radio and reinstall.
- Go to next step: If DTC B126A is not set
3. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for Radio replacement, programming, and setup.
READ NEXT:
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.
Refe
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.
Refe
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.
Refe
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confirm the setting. This will change
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of measurements you select.
Speed Warning : This display is
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which the speed warning chime
sounds and the alert is displayed.
NOTE: Examples used in this article are general in nature and do not
necessarily
relate to a specific engine or system. Illustrations and procedures have
been chosen to guide mechanic through engine overhaul process.
Descriptions of processes of cleaning, inspection, assembly and machine
shop prac