GM Service Manual Online
For 1990-2009 cars only

Circuit Description

This DTC is generated by the module when an error occurs between the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory. The only circuit required is the class 2 communications line.

Conditions for Running the DTC

The DTC is run when the Radio changes from OFF to ON. This may be in response to the radio switch or the ignition ON signal.

Conditions for Setting the DTC

This DTC is generated by the module when an error occurs between the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory. This happens when the radio changes from OFF to ON.

Action Taken When the DTC Sets

The radio does not function. The radio also displays as many characters of the word "CALIBRATE" as will fit in the radio display.

Conditions for Clearing the MIL/DTC

Re-calibration with the correct calibrations for the vehicle and cycling the radio to OFF then to ON will clear the DTC if there is no damage to the radio.

Step

Action

Yes

No

Schematic Reference: Radio/Audio System Schematics

Connector End View Reference: Entertainment Connector End Views

1

Did you perform the Radio/Audio System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, configure the radio to the vehicle.

Does the DTC reset?

Go to Step 3

System OK

3

Important:: Perform the set up procedure for the radio.

Replace the radio. Refer to Radio Replacement .

Did you complete the replacement?

System OK

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