Theft Deterrent System Diagnosis

DTC B1009 EEPROM Checksum Error:

CIRCUIT DESCRIPTION
The The Deterrent (VTD) Module performs an internal (checksum) function test on the EEPROM each time that the ignition switch is turned to ON. If the EEPROM fails this function test, the VID module will indicate a malfunction is current.

CONDITIONS FOR SETTING DTC
The VTD module detects an internal checksum test malfunction.

ACTION TAKEN WHEN THE DTC SETS
^ Stores a DTC B1009 in the VTD module memory.
^ No driver warning message will be displayed for this DTC.

CONDITIONS FOR CLEARING DTC
^ The VTD module no longer detects an internal checksum malfunction.
^ A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
^ Use the On-Boards clearing DTCs feature.
^ Use a scan tool.

DIAGNOSTIC AIDS
Since the EEPROM cannot be removed from the VTD module and DTC B1009 is an internal VID module malfunction, the VID module may be replaced.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
1. Perform the Theft Deterrent System Diagnostic System Check before continuing with the diagnosis of this DTC.
2. Clear all DTCs and cycle ignition to check that the DTC did not falsely set.
4. Clear all DTCs when the repair is complete. Verify that the DTC did not reset.