Buick Regal: Voice Recognition Malfunction (without UE1)

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 provide an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

The human machine interface control module uses the cellular telephone microphone for voice recognition and cellular features. The human machine interface control module provides a bias voltage to each microphone (+) and (-) signal circuits for operation of the microphone.

Diagnostic Aids

• Refer to the Vehicle Owners Manual and/or the Navigation System Owners Manual for voice recognition use and commands.
• When the system recognizes the command the system will either perform the function or ask to confirm the choice by clearly saying "yes" or "no".
• If experiencing difficulty with the system recognizing a command, confirm that the command is correct.
• Background noise such as a climate control fan positioned on high, open windows, or very loud outside noises, can cause voice commands to be misunderstood.

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 Verification

1. Ignition ON, infotainment system ON.

NOTE: Refer to the Vehicle Owners Manual and/or the Navigation System Owners Manual for voice recognition use and commands.

2. Begin voice recognition for the infotainment system and clearly speak one of the available commands.

3. Verify the infotainment system responds correctly to the command.

• If the infotainment system does not respond correctly to the command.

1. Clearly speak a different command.
2. Verify the infotainment system responds correctly to the command.
   • If the infotainment system does not respond correctly to any commands, refer to Circuit/System Testing.
   • Go to next step: If the infotainment system responds correctly to the command.
3. Refer to the Vehicle Owners Manual and/or the Navigation System Owners Manual for hints on speaking commands.

• Go to next step: If the infotainment system responds correctly to the command.

4. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B24 Cellular Phone Microphone. Ignition ON.

2. Test for 9 - 11 V between the signal circuit terminal B and ground.

• If less than 9 V

1. Ignition OFF, disconnect the X1 harness connector at the K74 Human Machine Interface Control Module.
2. Test for infinite resistance between the signal circuit and ground.
   • If less than infinite resistance, repair the short to ground in the circuit.
   • Go to next step: If infinite resistance
3. Test for less than 2 Ω in the signal circuit end to end.
   • If 2 Ω or greater, repair the open/high resistance in the circuit.
   • If less than 2 Ω, replace the K74 Human Machine Interface Control Module.

• If greater than 11 V

1. Ignition OFF, disconnect the X1 harness connector at the K74 Human Machine Interface Control Module. Ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
   • If 1 V or greater, repair the short to voltage on the circuit.
   • Go to next step: If less than 1 V, replace the K74 Human Machine Interface Control Module.

• Go to next step: If between 9 - 11 V

3. Test for less than 1 V between the signal circuit terminal A and ground.

• If greater than 1 V

1. Ignition OFF, X1 harness connector at the K74 Human Machine Interface Control Module.

   Ignition ON.

2. Test for less than 1 V between the signal circuit and ground.
   • If 1 V or greater, repair the short to voltage in the circuit.
   • If less than 1 V, replace the K74 Human Machine Interface Control Module.

• Go to next step: If less than 1 V

4. Ignition OFF, disconnect the X1 harness connector at the K74 Human Machine Interface Control Module.

5. Test for infinite resistance between the B24 Cellular Phone Microphone signal circuit terminal A and ground.

• If less than infinite resistance

Repair the short to ground in the circuit

• Go to next step: If infinite resistance

6. Test for less than 2 Ω in the signal circuit end to end.

• If 2 Ω or greater

Repair the open/high resistance in the circuit

• Go to next step: If less than 2 Ω

7. Replace the B24 Cellular Phone Microphone.

8. Ignition ON, infotainment system ON.

9. Begin voice recognition for the infotainment system and clearly speak one of the available commands.

10. Verify the infotainment system responds correctly to the command. 

• If the infotainment system does not respond correctly to the command.

1. Clearly speak a different command.
2. Verify the infotainment system responds correctly to the command.
   • If the infotainment system does not respond correctly to any commands, replace the K74 Human Machine Interface Control Module.
   • Go to next step: If the infotainment system responds correctly to the command.
3. Refer to the Vehicle Owners Manual and/or the Navigation System Owners Manual for hints on speaking commands.

• Go to next step: If the infotainment system responds correctly to the command.

11. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

• Refer to Mobile Telephone Microphone Replacement
• Refer to Control Module References for human machine interface control module replacement, programming, and setup.

RADIO RESET

Radio Reset Procedure

For radio RPO's IOU and IOT this procedure needs to be followed before a radio is removed for replacement.

NOTE: Selecting Continue restores all factory settings.

1. In Radio, Settings select Return to Factory Settings.

2. Three options will be listed, select each option below then select Continue to reset.

• Reset Vehicle Settings
• Erase Settings and Personal Data
• Clear Default Applications

3. Wait 2 min then ignition/vehicle OFF.

4. Replace A11 Radio and program, refer to Control Module References.

5. Start engine and allow to run for 3 min.

6. Ignition/Vehicle OFF, open/close driver door.

7. Allow vehicle modules to sleep, this may take up to 5 min.

8. Ignition/vehicle ON, download customers desired applications.

NOTE: If the Radio Reset is unable to be performed on the original radio due to a blank screen or similar failure follow the steps below:

1. Replace A11 Radio and program, refer to Control Module References.

2. Attempt to download or access any app.

3. If an error is displayed perform an OnStar Blue Button press and diagnose the issue with the help of an OnStar advisor.

SD CARD SETUP

After a new SD Card has been installed, whether if be for the first time during new car prep or a replacement part for service, a series of on screen questions will need to be answered to properly setup the new SD Card. Failure to answer the questions correctly will result in the Navigation system being inoperative. Follow the steps below:

NOTE: Do not remove the SD Card with the ignition ON as this could corrupt the SD Card and cause navigation related errors.

NOTE: When inserting the SD card ensure the read/write switch on the side of the card is in the UP position (towards the contacts). Insert the card straight and not at an angle to ensure the card does not rub on the side of the slot changing the position on the switch. If the switch is in the incorrect (down) position unexpected messages and a loss of navigation features may occur.

1. Ignition OFF

2. Remove the old SD Card from the X83 Auxiliary Audio Input SD Card slot if needed, insert the new SD Card into the slot making sure it is fully seated.

3. Ignition ON, infotainment system ON.

4. The first screen to appear will read, Access and Input Data Permissions. Select Show Permissions

5. The next 4 screens will ask for certain access and permission. Select ALLOW on all screens.

NOTE: If DENY is selected on any screen the Navigation system will be inoperative.

6. If successful, the last screen will display a Navigation Map.

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