2010 Cadillac Truck SRX FWD V6-3.0L Page 548

2010 Cadillac Truck SRX FWD V6-3.0L Page 548

瀚慖f less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K73

telematics communication interface control module.

瀚慖f greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the K73 telematics

communication interface control module.

4. If all circuit test normal, replace the B24 cellular phone microphone.

Repair Instructions

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

* Mobile Telephone Microphone Replacement (See: Accessories and Optional Equipment/Cellular Phone/Cellular Phone Microphone/Service

and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for telematics communication interface control

module replacement, setup, and programming

B2462

DTC B2462 (OnStar/Navigation GPS Antenna)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B2462 01

- Global Positioning System Short to Battery

DTC B2462 02

- Global Positioning System Short to Ground

DTC B2462 04

- Global Positioning System Open

Circuit/System Description

The cellular phone, navigation, and digital radio antenna is connected to the telematics communication interface control module. This module

supplies 5 V to the cellular phone, navigation, and digital radio antenna to power the internal amplifier. When the vehicle is equipped with the

optional navigation radio, a navigation signal splitter is installed to distribute the GPS signal to both the telematics communication interface control

module and the navigation radio. The navigation radio supplies 5 V through the GPS antenna coaxial cable to the navigation signal splitter to power

the internal navigation radio signal amplifier.

Conditions for Running the DTC

Onstar - Telematics Communication Interface Control Module

* Ignition is in the RUN or ACC position.

* System voltage is greater than 9 V and less than 16 V.

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

Navigation Radio

* Radio On.

* System voltage is greater than 9 V and less than 16 V.

* The navigation radio tests the GPS antenna every 10 seconds.

Conditions for Setting the DTC

B2462 01

The telematics communication interface control module and/or the navigation radio detect a short to B+ on the GPS antenna signal circuit.