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For 1990-2009 cars only

Schematic

Refer to Theft Deterrent System Schematics

PASS-Key® III


Object Number: 566514  Size: FS
Theft Deterrent System Components
Vehicle Theft Deterrent (VTD) Description
Content Theft Deterrent
Underhood Fuse Block and Underhood Maxi-Fuse Block
Underhood Fuse Block, RUN/CRANK Fuse and IGN-1 Relay
Underhood Fuse Block, RUN/CRANK Fuse and IGN-1 Relay
Underhood Fuse Block, RUN/CRANK Fuse and IGN-1 Relay
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Underhood Fuse Block, PCM, ABS, HAZARD, FUEL PUMP, PARKLMP Fuses And Fuel Pump Relay
G202, 1 of 4
Cell 14: G202 (CKT 351 2 of 2)
.

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 VTD Controller Module . The VTD Controller Module then compares this value to a value stored in memory (learned key code). If the value is correct the VTD 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 RUN. The VTD Controller Module cannot have DTC B1327 set as a current DTC.

Conditions for Setting the DTC

If the code from the ignition key does not match one stored in memory, the VTD Controller Module sets this DTC. This code indicates the use of a key with a transponder that has not been learned by the VTD Controller Module. The vehicle considers this to be a theft attempt

Action Taken When the DTC Sets

  1. The VTD Controller Module sends a class 2 message containing a disable password to the PCM.
  2. The vehicle will not start.
  3. The VTD Controller Module sends a class 2 message to the instrument cluster to flash the SECURITY indicator.

Conditions for Clearing the MIL/DTC

The VTD Controller Module clears the current status of the DTC when it senses a valid, memorized, key code from the ignition key (transponder).

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. To set this code, a key with a working transponder was read by the VTD (Pass-Key® III) Module. For that key to operate the vehicle, you must perform a 10-minute or 30-minute re-learn procedure.

Step

Action

Yes

No

1

Did you perform A Diagnostic System Check - Vehicle Theft Deterrent?

Go to Step 2

Go to Diagnostic System Check - Theft Deterrent

2

Important: If you perform a 10-minute or 30-minute re-learn procedure, all keys not learned at that time will be erased and will not be recognized. Perform the Quick Learn Procedure on all keys or instruct the customer how to perform the Quick Learn Procedure.

Perform the VTD (Pass-Key® III) Module learn Procedure. Refer to Programming Theft Deterrent System Components .

Is the procedure complete?

Go to Step 3

--

3

  1. Use a scan tool in order to clear the DTCs.
  2. Attempt to start the vehicle.

Does the DTC reset?

Go to Step 2

System OK