Navigation System - Voice Guidance Inoperative or Degraded Quality

Navigation System - Voice Guidance Inoperative or Degraded Quality

Diagnostic Instructions

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

Circuit/System Testing

1. Ignition OFF, disconnect the radio harness connector X2 and VCIM harness connector X3.
2. Test for less than 1 volt on the mono out circuit radio harness connector terminal 7 and ground.

• If greater than specified value, repair short to voltage.

3. Test for greater than 1 ohm between the mono out circuit radio harness connector terminal 7 and ground.

• If less than specified value, repair short to ground.

4. Test for less than 1 ohm between the mono out circuit radio harness connector terminal 7 and the microphone out signal circuit VCIM harness connector terminal 1.
5. If greater than specified value, repair open circuit.
6. Test for less than 1 volt on the low reference circuit radio harness connector terminal 15 and ground.

• If greater than specified value, repair short to voltage.

7. Test for greater than 1 ohm between the low reference circuit radio harness connector terminal 15 and ground.

• If less than specified value, repair short to ground.

8. Test for less than 1 ohm between the low reference circuit radio harness connector terminal 15 and the low reference signal circuit VCIM harness connector terminal 2.

• If greater than specified value, repair open circuit.

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

Repair Instructions

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