2010 Cadillac Truck SRX AWD V6-2.8L Turbo 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.
