Question about 1997 Chevrolet Cavalier

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1997 Cavalier won't start! =*( Passlock? New PCM...

Hello! I seen some of your posts on here, and i'm hopeful that you may be able to help me out. I'm soooo lost as to what is wrong with my car, and how to fix it. Here's the problem....

First, I have a 1997 Cavalier RS, automatic, 2.2 engine. The car has the PASSLOCK anti theft system (original, not Passlock II)..

I had trouble almost a year ago with the PCM/Engine computer, and bought a new one from Autozone - they ofcourse sent it out to have it flashed for my specific VIN. After replacing the PCM, and doing the "Turn the ket for 10 minutes, then start" thing, it started, and everything was great!

Until one day, driving down the road, the PCM literally fell out of the car, and was ran over, twice. =/ This, ofcourse, damaged the PCM, and the engine wiring harness.

(I had the most difficult time ordering a new PCM from Autozone. First, I had one on order, had to borrow a car, and drive 50 miles to pick it up - only to find that the part was somehow not shipped, the order wasn't completed! So... I called another Autzone, in another town, and before going to pick it up, I called ahead, and again.......it didn't come in. So, finally... The part came in at the original store, and I got another ride to go pick it up.)

The PCM was hooked up, along with the wiring harness that I had to buy at a salvage yard (the original snapped when the PCM fell out - and the only place to purchase new is dealership, at around $1200!!! ....So, I had to go with the salvage yard).
The OBD II was reading "P1336", crankshaft relearn required? So.. Tried everything, nothing was working. The car would turn over, but not start, not even for a second or two. The anti-theft light would come on - not flashing, just staying on steady.

I then took this PCM back, thinking it may have been defective. This PCM has been hooked up.. The OBD II no longer reads "P1336". It finds no trouble codes at all... But.. The anti-theft light is still staying on steady. Now, the "check engine" light is also on.. And same deal, it turns over, with no start!

The "turn the key to ACC for 10 minutes, try to start" has been tried.. I'm so lost.

This is my only car, and it's been sooooo difficult being without a vehicle!

Any advice would be very much appreciated!! =)

~Sasha

GypsySunrise24649@gmail.com

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  • gypsysunrise Jul 29, 2008

    Thank you for your help.



    I have tried abotu everything, and towed my car to the chevy dealership today.



    They pretty much told me to sell my car for scrap metal (dead serious).



    See my blog for all details: http://gypsysunrise.multiply.com/journal

  • Laura Martin
    Laura Martin Oct 08, 2008

    I have a1997 Chevrolet Cavalier 2.2 manuel and my car tries to start but wont. My anti theft light will not go off now. I have checked for spark I have no spark. I had bought a ignition moduler and tried some advice like unplug the battery , put the cables back on wait 10 minutes then try to start it. It finally reset it self I guess and was working. Now its doing the same problem again and will not start. help me possibly find the answer to this.Please.

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Dont know if this is like my 97 Z24, couldnt start it, turn over but no start. wires were burnt in the harness to the ECM, had that traced and fixed, and after that, needed a new steering column with ignition and pulsar injection done as well as programming from GM for the column. steering column was because my passlock could not be bypassed. this may or may not be the same problem i had... my problem started because my ground wire came off my starter (which short circuited the system when i started it)

Posted on Jul 21, 2010

  • diamondtia Mar 29, 2011

    there is a very simple way of bypassing this annoying anti theft. The GM dealers don't want to tell you because they want you to spend a bloody fortune on your car and money in their pockets.

    Take the shroud off your steering wheel. Under the hood, take the fuse out for your airbag so it doesnt' pop out on you. Look where your key goes in, there should be a 3 or 4 really tiny wiring harness that goes to the ignition switch. Turn your key to the "on" position, cut the "yellow" wire and this will bypass the whole anti theft system. Disadvantage is your anti theft light will stay on but if it bugs you, just put a piece of black tape over it. Problem solved.

×

Thank you for your help. Unfortunately, this did not work. I took the car to the dealership today (had to tow it *sigh*) and they pretty much told me I should sell my car for scrap metal. =(

They said I have to buy a new wiring harness, from them, and it's over $3000, then add in fees, labor...

He said it's the wrong harness, and it's wired wrong. Wow.

If you want to read all the details, they are on two of my blog entries, on the link below.

http://gypsysunrise.multiply.com/journal

Posted on Jul 29, 2008

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  • 58 Answers

You may have to relearn the passcode 3 times before it will take. When you leave the key on for the APPROX. time of ten minutes you want the sec light to go off and then shut the key off and do it again. 3 times. Try that and let me know. Thanks...Dan

Posted on Jul 19, 2008

  • djlocs Aug 29, 2010

    I did that it still didn't start. Brother is going to auto zone to get a thing thats gonna tell you a code to what might be wrong. If we find out anything I will post it on this site.

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6 Suggested Answers

gpgab97
  • 77 Answers

SOURCE: gm passlock security system how to disable

Wiring diagrams can be found online, however i believe you can re-learn the key by leaving it inside the ignition tumblen and switch it to accesory. Then disconnect the b attery for about ten minutes and then try starting the car without taking the key out.

Posted on May 03, 2009

Molson02536
  • 3854 Answers

SOURCE: 2002 Saturn S-series Passlock needs to be reset

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

Molson02536
  • 3854 Answers

SOURCE: I have a VERY intermitent/passlock - no start

Common for the ignition lock switch it self has gone bad and will need to be replaced. This is more common if you have lots of keys on your your key chain, the extra weigh wear out the electrical sleeves in the cylinder walls making the passlock not to read the proper resistor reading on your ignition keys and needs to be reset all the time. My In-Laws had the same problem with there Grans Am and was at the deal once a year for it. Once the warranty ended I got the passlock 2 by pass for around $70.00. The factor alarm still works but the ignition immobilize was disabled so they would not get stranded out in the cold. Here is the link and good luck, keep me posted and it's just a plug and play so there is not wire cutting and splicing. Keep me posted and don't forget the rate. http://www.gmpasslock.com/

Posted on Jan 07, 2010

Testimonial: "Did you have to be a serious tech head to install this passlock bypass?"

Molson02536
  • 3854 Answers

SOURCE: pass lock problems

Your Passlock may need to relearn the ignition keys, if the ignition lock has gone bad like my in-laws Grand Am Gt, here is what i did so they will not get stranded any more. Buy a Passlock by pass module for around $70.00. You can order one from GMPASSLOCK.COM in the mean time try resetting the Passlock. Good luck

Ignition keys relearn 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.



Posted on Jan 18, 2010

  • 1 Answer

SOURCE: the stupid passlock!!!!

Take off panel on steering wheel. on right side next to where you put in the key there are some wires plugged together there. Try to get it started it will eventually. While the car is running...Just unplug them. Your anti theft light will stay on but it will start.

Posted on Feb 21, 2011

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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Posted on Jan 02, 2017

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Need to get 98 s10 2.2 to rset passlock . howcan i trick computer withturn signal switch, i seen it done once


No you didn't ! you only think you did . Turn signal switch has nothing to do with it .
Ignition Lock Cylinder and Housing
The ignition lock cylinder is located at the upper right side of the steering column. The Passlock™ sensor is in the steering column. The Passlock™ sensor is separate from the key and lock cylinder. The key and the lock cylinder work together in order to determine if the proper ignition key was used to start the vehicle.
In the event of an open Class 2 serial data line between the BCM and the VCM/PCM, the vehicle will become fail-enabled if the VCM/PCM has already received the password from the BCM for that ignition cycle (the engine is running). In this event, the following conditions occur:
• The security telltale will be ON continuously.
• The VCM/PCM will become fail-enabled for future ignition cycles.
If a failure in the Class 2 serial data line occurs before the ignition cycle, when the VCM/PCM is not fail-enabled, the following conditions occur:
• The VCM/PCM will never receive a valid password in order to enable the fuel injectors.
• The vehicle will not start.

The design of the passlock™ system is to prevent the vehicle operation if the proper ignition key is not used in order to start the vehicle. The mechanical key, in normal operation, will turn the passlock™ lock cylinder. The passlock™ sensor will relay the passlock™ data to the body control module (BCM). The BCM will determine the validity of the passlock™ data. The BCM will send a code password to the vehicle/powertrain control module (VCM/PCM). When the VCM/PCM receives the correct code the VCM/PCM allows the fuel injectors to operate normally. The passlock™ system requires the VCM/PCM and the BCM to communicate the various functions in order to operate. These functions transmit over the class 2 serial data line CKT 1807. For an explanation of the class 2 serial data operation refer to Data Link Connector Circuit Description in Wiring Systems.
Your best bet , take it to a qualified repair shop , there is a real possibility of rendering your vehicle useless if you don't know what your doing

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Where is the anti theft system fuse located on 2001 Chevy cavalier


There is no fuse for the anti-theft system ! It receives it's voltage from the BCM . Do you know what a BCM is ? It is a Body control module .
The Passlock?"¢ System is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. If starting is attempted without authorization from the Passlock?"¢ System, the powertrain control module (PCM) will disable engine starting. Start disable may be in the form of fuel disable or starter disable, depending on engine application.
The components of the Passlock?"¢ System are as follows:
?€¢
The ignition lock cylinder and key


?€¢
The ignition lock cylinder case, including the Passlock?"¢ sensor


?€¢
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?€¢
The body control module (BCM)


?€¢
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?€¢
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Now then Karen what problem is your vehicle having , no start an SECURITY light flashing or on solid ?
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If you tried to hot wire the ignition, you may have shorted out the pass lock wire in the ignition switch. You may have to replace the ignition switch. Try the relearn process, 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.

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