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Diagnostic Trouble Code: 2
Diagnostic Trouble Code Name: Ambient Air Temperature Sensor
Vehicle Make: Chevrolet
Vehicle Model: Epica (V250)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Cellular Phone Select Service Switch
Possible Sensor Faults
Communication Interface Module
Possible Related Diagnostic Trouble Codes
DTC B2476 or B2482
Circuit / System Description
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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