Thursday, September 3, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 555

2010 Cadillac Truck SRX AWD V6-3.0L Page 555



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



* Inside Rearview Mirror Replacement (See: Body and Frame/Mirrors/Service and Repair/Inside Rearview Mirror Replacement)



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



module replacement, setup and programming



B2482



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.



B2482 and B2476 59



The telematics communication interface control module detects a valid signal on the keypad signal circuit for longer than 15 seconds. If one of the



OnStar(R) buttons is held or stuck for 15 seconds or greater, the telematics communication interface control module will set this DTC.

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