Chevrolet Trax: Navigation system - voice recognition malfunction

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.
• Diagnostic Procedure Instructions provide an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

When voice recognition for the navigation equipped infotainment system is started, voice signals from the cellular phone microphone are passed through the telematics communication interface control module to the radio via the voice recognition audio circuits.

Diagnostic Aids

• Refer to the Navigation System Owners Manual for voice recognition use and commands.
• Navigation voice commands are not available until the OK button has been selected.
• If the radio is off, the only commands available will be Hands Free and Help.
• 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

OnStar/Telematics Schematics (Encore), OnStar/Telematics Schematics (Trax)

Connector End View Reference

WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - INDEX - TRAX

Description and Operation

Radio/Audio System Description and Operation (with Monochrome Display), Radio/Audio System Description and Operation (with Color Display)

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• 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.

• If the OnStar voice recognition system is operating normally.

2. Ignition ON, radio ON.

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

3. Begin voice recognition for the radio 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.
• If the infotainment system responds correctly to the command.

3. Refer to the navigation system owners manual for hints on speaking commands.

If the infotainment system responds correctly to the command.

5. All OK

Circuit/System Testing

1. Ignition OFF, disconnect the X2 harness connector at the K73 Telematics Communication Interface Control Module and the X4 harness connector at the A11 Radio.
2. Ignition ON.
3. Test for less than 1 V between the signal circuits listed below and ground:

• voice recognition signal circuit A11 Radio X4 terminal 6
• voice recognition low reference circuit A11 Radio X4 terminal 16

If 1 V greater

Repair the short to voltage on the circuit.

If less than 1 V

4. Ignition OFF.
5. Test for infinite resistance between the circuits listed below and ground:

• voice recognition signal circuit A11 Radio X4 terminal 6
• voice recognition low reference circuit A11 Radio X4 terminal 16

If less than infinite resistance

Repair the short to ground on the circuit.

If infinite resistance

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

• A11 Radio X4 terminal 6 and the K73 Telematics Communication Interface Control Module X2 terminal 6
• A11 Radio X4 terminal 16 and the K73 Telematics Communication Interface Control Module X2 terminal 12

If 5 ohms greater

Repair the open/high resistance in the circuit.

If less than 5 ohms

7. Replace the A11 Radio. Connect all harness connectors.

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

8. Begin voice recognition for the radio 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.

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 radio or telematics communication interface control module replacement, programming, and setup.

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