B2462

DTC B2462

Diagnostic Instructions

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

DTC Descriptor
DTC B2462
- Global Positioning System (GPS) Signal Error

Circuit Description

The global positioning system (GPS) antenna is connected to the navigation radio by a coaxial cable.

Conditions for Running the DTC

The radio must detect one of the following power modes:

* ACC
* ON
* RAP
* RAP UNLK

Conditions for Setting the DTC

* The navigation radio test the GPS antenna every 10 seconds.
* The radio determines there is an open in the GPS antenna.

Actions Taken When the DTC Sets

* Unable to get GPS location updated, the radio uses the last reported position and the vehicle speed signal to calculate the vehicle position.
* Route guidance may be inaccurate.
* This failure has no effect outside the navigation system.

Conditions for Clearing the DTC

* A current DTC clears when the radio does not detect the failure for more than 10 seconds.
* A history DTC clears after 50 ignition cycles with no repeat of the failure.

Reference Information
Schematic Reference

Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning)

Circuit/System Testing

1. Ignition OFF, disconnect the GPS coaxial cable from the GPS antenna.
2. Ignition ON, test for 4.0-5.5 volts between the center conductor and the shield of the coaxial cable.

• If not within the specified range, replace the GPS antenna.

3. Ignition OFF, test for less than 5 ohms or resistance at the GPS coaxial cable center conductor from end to end.

• If greater than the specified range, replace the GPS coaxial cable.

4. Ignition OFF, test for infinite resistance between the center conductor and the outer conductor of the GPS coaxial cable.

• If less than the specified range, replace the GPS coaxial cable.

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

Repair Instructions

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

* Global Positioning System (GPS) Antenna Replacement (Global Positioning System (GPS) Antenna Replacement)
* Control Module References (Programming and Relearning)for radio replacement, setup, and programming