The radio (IRC) receives the vehicle identification number (VIN) from the class 2 serial data line and compares the VIN with the VIN stored in the radio. If the broadcast VIN does not match the VIN stored in the radio, the Theftlock feature is enabled.

If the broadcast VIN does not match the VIN stored in the radio, the Theftlock feature is enabled, and DTC 1780 is set as current.

The radio displays LOCKED--THEFTLOCK ACTIVE when the radio is turned ON, and stores DTC B1780 as current.

When the radio receives a VIN that matches the VIN stored in the radio, DTC B1780 changes to history and the Theftlock feature is disabled.

Use a scan tool in order to clear the THEFTLOCK mode.