2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 624

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 624

* The navigation radio tests the GPS antenna every 10 seconds

Conditions for Setting the DTC

B2462 02

The navigation radio detects a short to ground in the GPS antenna signal circuit.

B2462 04

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

Actions Taken When the DTC Sets

* The radio uses the last reported position and the vehicle speed signal to calculate the vehicle position.

* Route guidance may be inaccurate.

* Turn by turn navigation may be inaccurate or inoperative.

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.

Reference Information

Schematic Reference

Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System

Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Testing

Important: The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not

have reception near tall buildings or inside structures.

1. Ignition OFF, disconnect the GPS antenna coax cable from the navigation radio.

2. Ignition ON, test for 4.5-5.5 volts between the coax cable connection center conductor at the radio and ground.

瀚慖f not within the specified range, replace the radio.

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

Repair Instructions

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

* Electronic Navigation Antenna Replacement (See: Accessories and Optional Equipment/Antenna/Antenna Mast/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for radio replacement, setup, and programming