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Home >> Pontiac >> 2007 >> Solstice Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 177 (Cellular Systems, Entertainment Systems & Navigation Systems) >> Diagnostic Information and Procedures >> DTC B2476 or B2482 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The OnStar® button assembly consists of 3 buttons, Call/Answer, OnStar® Call Center, and OnStar® Emergency. The communication interface module (CIM) supplies the OnStar® 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 CIM over the keypad signal circuit. Depending upon the voltage range returned, the CIM is able to identify which button has been activated.

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