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 shielded coaxial cable. The GPS antenna is powered through the same coaxial cable used to send signals to the navigation system. The antenna cable also provides a path for DC current for powering the GPS antenna.

Conditions for Running the DTC

* The radio is ON.
* Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

B2462 02

The DTC will set when the navigation radio detects a short to ground in the GPS antenna signal circuit.

B2462 04

The DTC will set when the navigation radio detects an open/high resistance in the GPS antenna signal circuit.

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.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Circuit/System Testing

1. Ignition OFF, disconnect the coax harness connectors at the navigation radio and the GPS antenna.
2. Test for less than 5 ohms of resistance between the two ends of the coax cable center conductor.

^ If greater than the specified range, replace the GPS antenna coax cable.

3. Test for less than 5 ohms of resistance between the two ends of the coax cable outer shield.

^ If greater than the specified range, replace the GPS antenna coax cable.

4. Test for infinite resistance between the coax center conductor and the outer shield.

^ If less than the specified range, replace the GPS antenna coax cable.

5. Connect the coax harness connector at the navigation radio.
6. Ignition ON, test for 4.0-5.5 volts between the coax center conductor and the outer shield.

^ If not within the specified range, replace the navigation radio.

7. If all circuits test normal, replace the GPS antenna.

Repair Instructions

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

* Cellular and Navigation Antenna Assembly Replacement