Test Description

WARNING: This page is about a different car, the 2005 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

2: This step tests the at rest state of the keypad signal circuit.

DTC B2482: CELLULAR PHONE SELECT SERVICE SWITCH RANGE/PERFORMANCE

Step	Action	Value(s)	Yes	No
Schematic Reference: ONSTAR SCHEMATICS Connector End View Reference: CELLULAR COMMUNICATION CONNECTOR END VIEWS
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE in Vehicle DTC Information
2	Turn ON the ignition, with the engine OFF. Measure the voltage from the keypad signal circuit at the Vehicle Communication Interface Module (VCIM) connector to a good ground. Does the voltage measure greater than the specified value?	0 V	Go to Step 3	Go to Step 4
3	Test the keypad signal circuit for a short to voltage or high resistance. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems. Did you find and correct the condition?	-	Go to Step 9	Go to Step 5
4	Test the keypad supply voltage circuit for an open or short. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems. Did you find and correct the condition?	-	Go to Step 9	Go to Step 6
5	Inspect for poor connections at the harness connector of the rearview mirror. Refer to TESTING FOR INTERMITTENT CONDITIONS & POOR CONNECTIONS and CONNECTOR REPAIRS in Wiring Systems. Did you find and correct the condition?	-	Go to Step 9	Go to Step 7
6	Inspect for poor connections at the harness connector of the VCIM. Refer to TESTING FOR INTERMITTENT CONDITIONS & POOR CONNECTIONS and CONNECTOR REPAIRS in Wiring Systems. Did you find and correct the condition?	-	Go to Step 9	Go to Step 8
7	Replace the rearview mirror. Refer to REARVIEW MIRROR REPLACEMENT (EXCEPT DD8) or REARVIEW MIRROR REPLACEMENT (DD8) in Stationary Windows. Did you complete the replacement?	-	Go to Step 9	-
8	Replace the VCIM. Refer to CONTROL MODULE REFERENCES in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 9	-
9	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	-	Go to Step 2	System OK