B2721

Theft Deterrent System Schematics: PASS-Key(R) III:

DTC B2721 Invalid Coded Key is Present:

CIRCUIT DESCRIPTION
The Theft Deterrent (VTD) module performs an internal test to determine if a valid key is present every 300 milliseconds. If the test determines that a invalid key is present the VTD module will indicate a invalid coded key is current.

CONDITIONS FOR SETTING THE DTC
At the beginning of the ignition cycle the VTD module detects a invalid coded key.

ACTION TAKEN WHEN THE DTC SETS
^ Stores a DTC B2721 in the VTD module memory.
^ Security indicator is illuminated.

CONDITIONS FOR CLEARING THE DTC
^ The VTD module detects a valid coded key.
^ The history DTC will clear after 50 ignition cycles.
^ Use a scan tool in order to clear a history DTC.

DIAGNOSTIC AIDS
Check all vehicle ignition keys and inspect the invalid key(s) for damage.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table:
1. Perform the Theft Deterrent 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 after the repair procedure is complete.