B3055

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 controller module. The theft deterrent controller module then compares this value to a value stored in memory (learned key code). If the value is correct the theft deterrent controller module sends the enable password via the class 2 serial data circuit to the PCM.

CONDITIONS FOR RUNNING THE DTC
The ignition switch must be in ON. The theft deterrent controller (VTD) module cannot have DTC B1327 set as a current DTC.

CONDITION FOR SETTING THE DTC
The theft deterrent controller (VTD) module is unable to measure the ignition key transponder value. This may be due to a damaged or missing transponder, a non PASS-KEYIII(R) (PK3) key, or a damaged exciter.

ACTION TAKEN WHEN THE DTC SETS

IMPORTANT: If the theft deterrent controller (VTD) 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 VTD 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 VTD module is fail enabled, the Pass Key III(R) system is NOT active and the vehicle will start. The module WILL send its enable password even if a transponder value is not received. The VTD module will remain fail enabled until the module measures a valid key transponder value.
^ The vehicle theft deterrent controller (VTD) module sends a class 2 message containing a disable password to the PCM.
^ The vehicle will not start.
^ The VTD module sends a class 2 message to the instrument cluster to illuminate the SECURITY indicator on steady.

CONDITIONS FOR CLEARING THE MIL/DTC
The theft deterrent controller (VTD) 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 1-15:

The numbers below refer to the step numbers on the diagnostic table:
2. Verifies the condition for setting DTC B3055 is current.
3. The key must be a PASS-KEYIII(R) transponder key with an operating transponder for the system to work.
4. The only method to confirm whether the transponder in the key or the VTD (PASS-KEYIII(R)) module is malfunctioning is to try a alternative component in the system. The vehicle was delivered with 2 keys.
5. The possibility is unlikely that more than one key will be defective. If all keys do not work, the VTD (PASS-KEYIII(R)) module must be malfunctioning.
6. If the vehicle has a malfunctioning VTD (PASS-KEYIII(R)) module that malfunctioned during an ignition cycle, the system will be "fail enabled" and the vehicle will start for all keys.
8. If a new key must be tried, the key must have the proper mechanical cut and the VTD (PASS-KEYIII(R)) module must "learn" the transponder value.
9. If only one key was available for the vehicle and the replacement key does not work, the VTD (PASS-KEYIII(R)) module must be malfunctioning.