Navigation System - Voice Recognition Malfunction

Navigation System - Voice Recognition Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

Reference Information
Schematic Reference

OnStar Schematics (OnStar Schematics)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Circuit/System Testing

1. Verify the OnStar(R) voice recognition is operating normally.

• If the OnStar(R) voice recognition is inoperative, refer to OnStar Microphone Malfunction (OnStar Microphone Malfunction).

2. Ignition OFF, disconnect the radio harness connector X1 and CIM harness connector X3.
3. Test for less than 1 volt on the voice recognition audio signal circuit radio harness connector terminal 4 and ground.

• If greater than specified value, test the circuit for a short to voltage.

4. Test for greater than 1 ohm between the voice recognition audio signal circuit radio harness connector terminal 4 and ground.

• If less than specified value, test the circuit for a short to ground.

5. Test for less than 1 ohm between the voice recognition audio signal circuit radio harness connector terminal 4 and the voice recognition audio signal circuit CIM harness connector terminal 2.

• If greater than specified value, test the circuit for an open/high resistance.

6. Test for less than 1 volt on the voice recognition audio low reference circuit radio harness connector terminal 5 and ground.

• If greater than specified value, test the circuit for a short to voltage.

7. Test for greater than 1 ohm between the voice recognition audio low reference circuit radio harness connector terminal 5 and ground.

• If less than specified value, test the circuit for a short to ground.

8. Test for less than 1 ohm between the voice recognition audio low reference circuit radio harness connector terminal 5 and the voice recognition audio low reference signal circuit CIM harness connector terminal 4.

• If greater than specified value, test the circuit for an open/high resistance.

9. If all circuits test normal, replace the radio.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Control Module References) for radio replacement, setup, and programming