B3060

THEFT DETERRENT - IMMOBILIZER - SOME EXPORT VEHICLES

CIRCUIT DESCRIPTION
When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge, if the calculations match the theft deterrent control module sends the fuel enable password via the class 2 serial data circuit to the powertrain control module (PCM). If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the PCM via the class 2 serial data circuit.

CONDITIONS FOR RUNNING THE DTC
The ignition switch must be ON. The theft deterrent control module cannot have DTC B1327 set as a current DTC.

CONDITIONS FOR SETTING THE DTC
If the transponder value from the ignition key does not match the one stored in memory, the theft deterrent control module sets this DTC. This DTC indicates the use of a key with a transponder value that has not been learned by the theft deterrent control module. The vehicle theft deterrent (VTD) system considers this to be a theft attempt.

ACTION TAKEN WHEN THE DTC SETS
^ The theft deterrent control module sends a fuel disable message to the PCM via the serial data circuit.
^ The vehicle will not start.
^ The theft deterrent control module sends a message to the instrument cluster to flash the SECURITY indicator via the serial data circuit.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The theft deterrent control module clears the current status of the DTC when it senses a valid, memorized, transponder value from the ignition key.
^ The DTC can be cleared by using a scan tool.

TEST DESCRIPTION

Steps 1-7:

The numbers below refer to the step numbers on the diagnostic table.
2. Verifies the condition for setting DTC B3060 is current.
4. The only method to determine which re-learn procedure to perform.
5. To set this DTC, a key with a working transponder that is not learned was read by the theft deterrent control module. For that key to operate the vehicle and more than 2 learned keys are available, perform the Adding Keys procedure.
6. To set this DTC, a key with a working transponder that is not learned was read by the theft deterrent control module. For that key to operate the vehicle, a 10 Minute Re-Learn Procedure or 30 Minute Re-Learn Procedure must be performed.