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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1368 (Cellular Communication System) >> Diagnostic Information and Procedures >> DTC B2482: A Button Is Depressed Or Stuck For More Than 15 Seconds >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The Onstar® button assembly consists of three buttons, Call/Answer, Onstar® Call Center and Onstar® Emergency. Ten volts is supplied to the button assembly on 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 Vehicle Communication Interface Module on the Keypad signal circuit. Depending upon the voltage range returned, the Vehicle Communication Interface Module is able to identify which button has been pressed.

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