Navigation System - Vehicle Position Indicator Inoperative or Erratic

Navigation System - Vehicle Position Indicator Inoperative or Erratic

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 Description

The vehicle speed signal (VSS) circuit from the instrument cluster to the navigation radio provides vehicle speed information to the radio for the purpose of updating the vehicle position indicator on the navigation screen.

Circuit/System Verification

Radio ON, press the NAV button to switch to the navigation screen on the radio. Drive the vehicle for at least 15 seconds at greater than 15 mph. Verify that the navigation screen shows that the vehicle is moving.

Circuit/System Testing

1. Ignition OFF, disconnect connector X2 at the radio.
2. Test for the vss signal between terminal E and ground while driving the vehicle.

^ If the vss signal is not present test the vss circuit for an open.

3. If the circuit tests normal, replace the radio.

Repair Instructions

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