2010 Cadillac Truck SRX FWD V6-3.0L Page 553

2010 Cadillac Truck SRX FWD V6-3.0L Page 553

Repair Instructions

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

* Radio Antenna Base Replacement (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service and Repair/Radio Antenna

Base Replacement)

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

module replacement, setup, and programming

B2476

DTC B2476 or B2482

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 B2476 04

- Cellular Phone Select Service Switch Open Circuit

DTC B2476 59

- Cellular Phone Select Service Switch Stuck Button

DTC B2482 00

- Cellular Phone Select Service Switch Range/Performance

Diagnostic Fault Information

Circuit/System Description

The OnStar(R) button assembly consists of 3 buttons, Call/Answer, OnStar(R) Call Center, and OnStar(R) Emergency. The telematics

communication interface control module supplies the OnStar(R) button assembly with 10 V via the keypad supply voltage circuit. Each of the

buttons, when pressed, completes the circuit across a resistor allowing a specific voltage to be returned to the telematics communication interface

control module over the keypad signal circuit. Depending upon the voltage range returned, the telematics communication interface control module

is able to identify which button has been activated.

Conditions for Running the DTC

* Ignition ON.

* Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B2476 04

The telematics communication interface control module detects an open/high resistance on the keypad supply voltage circuit.