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.
- Clearly speak a different command.
- 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.
- 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
- Clearly speak a different command.
- 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.
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
MOBILE TELEPHONE MICROPHONE REPLACEMENT
Preliminary Procedure
Roof Console Replacement.
Mobile Telephone Microphone
Procedure
Release the retaining tabs.
Disconnect the electrical connectors.
RADIO/NAVIGATION SYSTEM WIRING SCHEMATICS (IOB)
Power, Ground, Serial Data and Subsystem References
Infotainment Display and Radio Controls
Antennas
Speakers
Auxiliary Inputs (MCY)
RADIO/NAVIGATI
SEE MORE:
Eliminating Air Conditioning (A/C) Odor
Odors may be emitted from the heat and air conditioning system primarily at
start up in hot, humid climates.
When the blower motor fan is turned on, an unpleasant, musty odor may be
released into the passenger
compartment. The following conditions may cause
The engine coolant heater,
if available, can help in cold weather
conditions at or below -18 ВєC (0 ВєF)
for easier starting and better fuel
economy during engine warm-up.
Plug in the coolant heater at least
four hours before starting the
vehicle. An internal thermostat in
the plug-end of the c