Anti theft system

Tiny
JOHNCOLEBAU
  • 1997 PONTIAC SUNFIRE
  • 4 CYL

Can I by-pass the anti theft on my car?

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Wednesday, May 18th, 2011 AT 12:43 AM

1 Reply

Tiny
WRENCHTECH
  • EXPERT
  • 20,807 POSTS

No, it uses a pass-lock sensor built right into the ignition key and tumbler.

The most common failure is the pass-lock sensor itself and I can give you a way to bypass that but the rest of the system must remain operational.

Here is how you can bypass the sensor:

Go buy a 2.2k (2200 ohm) ohm resistor at an electronics store. Go to radio shack and just get one as close to that as you can. Remove the covers on the steering column and locate three small wires at the lock cylinder. Cut the yellow wire and the orange/black wire or on some vehicles, it is the yellow and black wires. Solder the resistor between those wires. Tape it up and put the covers back on and follow this relearn procedure. If this does not work you have a wiring problem in the steering column.
Thirty Minute Re-Learn Procedure
1. Turn on the ignition, with the engine off.
2. Attempt to start the engine, then release the key to on (vehicle will not start).
3. Observe the security telltale, after approximately ten minutes the telltale will turn off.
4. Turn off the ignition, and wait five seconds.
5. Repeat steps one through four two more times for a total of three cycles/thirty minutes ( the vehicle is now ready to relearn the pass-lock sensor data code and/or passwords on the next ignition switch transition from off to crank).
Important:
The vehicle learns the pass-lock sensor data code and/or password on the next ignition switch transition from off to crank. You must turn the ignition off before attempting to start the vehicle.
6. Start the engine (the vehicle has now learned the pass-lock sensor data code and/or password).
7. With a scan tool, clear any DTCs if desired (history DTCs will self clear after one hundred ignition cycles).

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Wednesday, May 18th, 2011 AT 2:42 AM

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