Buick Regal: Voice Recognition Malfunction (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

1. infotainment system voice recognition inoperative

Circuit/System Description

When voice recognition for the infotainment system is started, voice signals from the cellular phone microphone are passed through the telematics communication interface control module to the Human Machine Interface Control Module via the voice recognition audio circuits.

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. Verify the OnStar  voice recognition system is operating normally.

• If the OnStar  voice recognition system is not operating normally.

Refer to OnStar Voice Recognition Malfunction.

• Go to next step: If the OnStar  voice recognition system is operating normally.

2. Ignition On/Vehicle in Service Mode. Infotainment system ON.

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

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

4. 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.

5. All OK.

Circuit/System Testing

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

2. Disconnect the X2 harness connector at the K73 Telematics Communication Interface Control Module. Ignition On/Vehicle in Service Mode.

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

• Voice recognition audio signal terminal 6
• Voice recognition audio low reference terminal 12
• If 1 V greater

Repair the short to voltage on the circuit.

• Go to next step: If less than 1 V

4. Ignition OFF.

5. Test for infinite resistance between the signal circuits listed below and ground:

• Voice recognition audio signal terminal 6
• Voice recognition audio low reference terminal 12
• If less than infinite resistance

Repair the short to ground on the circuit.

• Go to next step: If infinite resistance

6. Test for less than 5 Ω between the terminals listed below:

• K74 Human Machine Interface Control Module signal circuit terminal 1 X1 and the K73 Telematics Communication Interface Control Module signal circuit terminal 6 X2
• K74 Human Machine Interface Control Module low reference circuit terminal 2 X1 and the K73 Telematics Communication Interface Control Module low reference circuit terminal 12 X2
• If 5 Ω greater

Repair the open/high resistance in the circuit.

• Go to next step: If less than 5 Ω

7. Replace the K74 Human Machine Interface Control Module. Connect all harness connectors.

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

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

9. 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 K73 Telematics Communication Interface Control Module.

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

10. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for human machine interface control module or telematics communication interface control replacement, programming and setup.

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