B2960

CIRCUIT DESCRIPTION
When an ignition key is inserted into the ignition lock cylinder, 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 modules sends the fuel enable signal to the powertrain control module (PCM).

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

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

ACTION TAKEN WHEN THE DTC SETS

IMPORTANT: If the theft deterrent control module is unable to measure the ignition key transponder value for 30 consecutive seconds, after the vehicle has started, the module will enter a fail enable state. The vehicle will not stall or stop running. If the theft deterrent control module is in a fail enable state when the ignition is turned to OFF, it will remain fail enabled until the next time the vehicle is started. If the theft deterrent control module is fail enabled, the Pass Key Ill� system is NOT active and the vehicle will start. The theft deterrent control module WILL send its enable password even if a transponder value is not received. The theft deterrent control module will remain fail enabled until the module measures a valid key transponder value.

- The theft deterrent control module sends a message containing the disable password to the PCM.
- The vehicle will not start.
- The theft deterrent control module flashes the SECURITY indicator.

CONDITIONS FOR CLEARING THE MIL/DTC
The theft deterrent control module clears the current status of the DTC when it senses a valid, memorized, key code from the ignition key (transponder).

DIAGNOSTIC AIDS
Refer to Testing for Intermittent and Poor Connections and Testing for Electrical Intermittents in Diagrams.

TEST DESCRIPTION

Steps 1-7:

The numbers below refer to the step numbers on the diagnostic table.
2. Verifies the condition for setting DTC B2960 is current.
4. The only method to determine which re-learn procedure to perform.
5. To set this code, 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 one or more learned keys are available, perform the Adding Keys procedure.
6. To set this code, 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 there is only one key available, a 10 Minute or 30 Minute Re-Learn Procedure must be performed.