2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 622

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 622

Conditions for Running the DTC

* Ignition is in the RUN or ACC position.

* System voltage is between 9.5 V and 15.5 V.

* The above conditions are present for greater than 1 second.

Conditions for Setting the DTC

B2462 02

The telematics communication interface control module detects a short to ground on the navigation antenna signal circuit.

B2462 04

The telematics communication interface control module detects an open/high resistance on the navigation antenna signal circuit.

Action Taken When the DTC Sets

* The OnStar(R) status LED turns red.

* The OnStar(R) Call Center cannot locate the vehicle.

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

* OnStar Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/OnStar Schematics)

* Antenna Coaxial/Connector Cable Identification Table (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Antenna

Cable/Application and ID)

Connector End View Reference

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

Description and Operation

OnStar Description and Operation (See: Accessories and Optional Equipment/Description and Operation/OnStar Description and Operation)

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

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

Circuit/System Verification

Note: The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning

key on for the GPS satellites to acquire vehicle signal.

Ignition ON, wait 5 minutes, then contact the OnStar call center consultant by pressing the blue OnStar button. A call center consultant should

answer the call, verifying the vehicle OnStar system is functioning and the consultant can locate the vehicle.

Circuit/System Testing

1. Ignition OFF, disconnect both the GPS and cell coax cable connectors at the K73 telematics communication interface control module.

2. Connect the EL-49903 to the K73 telematics communication interface control module, place the test antenna on the roof of the vehicle.