Question about 2002 Saturn S-Series

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2002 Saturn S-series Passlock needs to be reset

When we changed the battery the Passlock security light came on and now it won't start. How can I reset it?

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  • kindhart1984 Jun 22, 2009

    We tried this method, as it was suggested to us before and the security light never went off.

  • kindhart1984 Jun 22, 2009

    Thanks :-) Where is that fuse located?



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Try this first, it takes about 30 min to do. 30-Minute Learn Procedure 1. Turn ON the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON; the vehicle will not start. 3. Observe the SECURITY tell tale light. After approximately 10 minutes, the light will turn OFF. 4. Turn OFF the ignition switch, and wait 5 seconds. 5. Repeat steps 1 through 4 - two more times - for a total of 3 cycles of 10 minutes. 3x10 = 30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch turn from OFF to CRANK Important: Turn the Ignition Switch OFF. The vehicle learns the Passlock 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 Passlock Sensor Data Code and/or password. 7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles. Without a scan tool you may have momentary starter interruptions while history clears itself. Good luck and hope this helps, keep me posted, be glad to help 

Posted on Jun 22, 2009

  • 5 more comments 
  • Harvey N Tawatao
    Harvey N Tawatao Jun 22, 2009

    That is not good news friend, Check the fuse and see if the body control module (BCM) fuse has gone bad. It's been know from time to time i have heard the BCM has fried from replacing the battery and as the battery cables are reconnected ground first then positive will cause this. Positive should have been connected first thant then ground with out crating to much arching so the electrical system don't get a spike which fries the BCM. Good luck and keep me posted.

  • Harvey N Tawatao
    Harvey N Tawatao Jun 23, 2009

    The fuses should be located in the center console under the heater controls, The fuse access panel is on the passenger side and the information to what the fuses and relays are is stamped on the inside of the fuse panel door. The panel just clips on so you need to give it a firm pull to remove it. Good luck and hope this helps. Keep me posted. 

  • hcccm Jan 16, 2011

    Thank you Molson02536. Your instructions worked my Saturn SL2 2002. HM

  • Tim Wood
    Tim Wood Nov 20, 2012

    I have the exact same car and am having the same problem. I tried the learn procedure 2 times, but still when I start my car it immediately shuts down and the security light flashes 5 times. Thier must be some other way to reset it surely.

  • Tim Wood
    Tim Wood Dec 02, 2012

    I figured it out on my own. It turns out that inside the lock cylinder the mechanism that checks the resistance of the key was bad. I got a used switch assebly at a salvage yard for 20 bucks and installed it then tried the steps again and after about 30 mins I was driving again. I just thought that I would post my findings for future reference to anyone having the same troubles

  • Samuel Hill
    Samuel Hill Nov 09, 2013

    What if it don't turn off? (mine didn't)

  • lmugirl195
    lmugirl195 Feb 04, 2014

    I tried this the first round and now my car completely shut down and is doing light, no security, no crank


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I changed the eignction is there a wire going from the compter for the security fi so can i cut it

Posted on Feb 10, 2014


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That sounds to me like a shotgun repair from a dealer who is not able to, or just not capable of performing the correct diagnosis procedures to repair the security system, but it is highly un-likely that the entire security system would fail at one time.

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sounds like the passlock is bad,,gotta go to dealer they got special break away bolts tha hold them on and the new one will need programming anyhow

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