B2462

DTC B2462

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.

DTC Descriptors

DTC B2462 02
- Global Positioning System (GPS) Short to Ground

DTC B2462 04
- Global Positioning System (GPS) Open Circuit

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.

Action 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.

Circuit/System Testing

1. Turn ON the ignition. Disconnect the GPS coaxial cable from the GPS antenna. Verify there is 4 to 5.5 volts between the center conductor and the shield of the coaxial cable.

• If 4 to 5.5 volts are present, replace the GPS antenna.

2. Turn the ignition OFF. Disconnect the GPS coaxial cable from the radio. Test the resistance of the GPS coaxial cable center conductor from end to end. Verify the resistance is less than 5 ohms.

• If the resistance greater than 5 ohms, replace the GPS coaxial cable.

3. Test the resistance of the GPS coaxial cable between the center conductor and the outer conductor. Verify there is infinite resistance between both conductors.

• If there is less than infinite resistance between the inner conductor and the outer conductor of the GPS coaxial cable, replace the GPS coaxial cable. If the GPS coaxial cable tests normal, replace the radio.

Repair Instructions

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

* Refer to Programming and Relearning Programming and Relearning

* Global Positioning System (GPS) Antenna Replacement