Tuesday, June 22, 2021

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.

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