PassKey III system? (Solved)

The Passkey III anti-theft system uses a transponder inside the head of the ignition key. The exciter inside the ignition lock cylinder energizes this transponder when the ignition switch is turned on. The transponder transmits a unique signature to the theft deterrent control module.

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Passkey III – transponder ignition key. The Passkey III anti-theft system uses a transponder inside the head of the ignition key. The exciter inside the ignition lock cylinder energizes this transponder when the ignition switch is turned on. The transponder transmits a unique signature to the theft deterrent control module. If the key signature transmitted is acceptable to the theft deterrent control module the theft deterrent control module will transmit fuel enable password to the PCM. If the

How can I bypass pass theft deterrent system?

Hold the key for 30 seconds in the position. That will tell the system you have the right key, and it will enable you to be able to bypass the car’s alarm system. There are some cars that will recognize the key by just turning back and forth on the key inside of the door’s lock key cylinder.

What is PassLock system?

The PassLock system was designed to prevent vehicle theft by disabling fuel to the engine if attempts are made to start the vehicle without the correct bitted key. PASSLock increased the level of security while retaining the ease of service and costs offered by standard ignition lock systems.

Does passlock disable fuel pump?

Yes, the fuel pump should still run even if there is a passlock issue.

How do I bypass GM passlock?

How to Disable a GM PassLock System

Leave the ignition key turned to the ‘On’ position after the vehicle has stalled and will not start.
Look at the dashboard and locate the theft system light.
Turn the ignition to the ‘Off’ position to disable the PassLock system, and wait for 20 seconds for the system to reset.

Is there a fuse for anti-theft system?

It is usually located on the dashboard by the driver’s door, in front of your left knee. You may find the alarm fuse in this fuse box. If you do not find an alarm fuse inside of the car, look in the fuse box under the hood on the driver’s side. Your car model may or may not have additional fuse boxes.

Will disconnecting battery reset anti theft?

It is another way to solve the problem of anti theft system car wont start. Disconnect the positive terminal of the battery for a minute or two. It will reset the computer system and your car is likely to kick off.

How do I permanently disable my car alarm?

If you’re wondering can you disable a car alarm permanently, the answer is yes, of course. There are simple instructions if you want to know how to disarm a car alarm completely. You should just unlock the door, start the car, remove the fuse, or detach the car battery.

Can you disable PassLock?

The Passlock system on a Vehicles is the anti-theft system. The Passlock system uses a recognition transponder in the ignition tumbler and a computer chip in the ignition key. While you cannot remove the Passlock system, you can disable it by tricking it into thinking the Vehicles had a malfunction.

What is passlock shutdown?

Passlock works to prevent vehicle theft by shutting of the fuel injectors if a thief tries to remove the lock cylinder from the vehicle. Removing the lock cylinder with a slide hammer is a very common theft technique.

How long does it take for PassLock to reset?

This will take approximately 10 to 15 minutes. Start the car immediately once the ‘Theft Sys’ light stays on steadily. Remember to not turn the key off. Your car will now reset the passlock system and start as usual.

How does pass key 3 work?

PassKey III When the key is positioned next to the lock cylinder receiver module, it energizes the transponder which sends a coded signal to the receiver. The receiver module checks its memory to see if the signal is correct. If it is, the module sends a signal to the PCM to enable the engine.

What is a Delphi pass key 3?

Page 3. Passkey III – transponder ignition key. The Passkey III anti-theft system uses a transponder inside the head of the ignition key. The exciter inside the ignition lock cylinder energizes this transponder when the ignition switch is turned on.

How do I reset my GM security system?

How do you reset the Chevy Silverado’s anti-theft system? Insert the ignition key, put it in the on position, attempt to start the engine. With the key in that position, wait ten minutes. The security light will blink and go out.

PassKey III system

This page is for you if you possess a General Motors vehicle with a PassKey iii system, or a prior PassKey II or PassLock system, and your car won’t start because the security light is illuminated. The history of anti-theft measures at General Motors VATS and PassKey are two terms that are used to refer to two different things. IGM’s initial effort at car anti-theft technology was dubbed the See the resistor pellet on the shaft of the key to the left of the plastic for further information on the resistor pellet.

It is, in fact, the very first PassKey system.

When you insert the key, electrical contacts installed on the lock cylinder measure the resistance of the key, and the reading is compared to the key’s resistance to determine if it is the proper key.

The Theft Deterrent Module determines the resistance value by measuring it (TDM).

It is the TDM module that assesses whether or not you have entered the correct key, and it alerts PCM of this fact with the following messages: ‘Tamper,’ ‘Normal,’ and ‘Fail Enable.’ If the correct key is pressed, the TDM module connects ground to the start enable relay, allowing the relay to operate.

TDM module declares a TAMPER mode and enters a 4-minute time out period if the resistance value does not match the preset value.
The start relay will not be enabled by the module.
After the 4-minute timeout, try cleaning the pellet and restarting the process.
The VATS technology was renamed to PassKey I in later models of automobiles.

Fix PassKey II

This system is nearly identical to PassKEY I, with the exception that the TDM is housed within the body control module instead (BCM). A valid key is determined by interpreting the key’s resistance reading, and the BCM notifies the PCM that the key has been verified and that it can begin the start sequence as a result of this interpretation. The systems rely on a pellet of resistors. A transponder is included in the key in subsequent versions of the key, known as PassKey III variants. If the PCM is changed, it is necessary to do a relearn operation.

PassLock In subsequent versions, General Motors opted to remove the key from the scene.
PassLock lock cylinder and lock cylinder housing for use with the system.
There is a method to General Motors’ reasons for switching to this system.
As a result, GM removed the key from the equation.

The PK3 mark on the shank of PassKey III transponder keys distinguishes them from other transponder keys. Unfortunately, the sensor and the cables that connect the sensor to the BCM failed at a rate that was almost exactly 100 percent of the time.

Fix PassKey III

GM returns to the key system, however this time they have discovered an antenna/transponder embedded in the head of the key. When the key is placed into the lock cylinder, an exciter situated at the aperture of the lock cylinder activates. The exciter emits a radio signal, which is picked up by the transponder and processed. Essentially, the signal activates a chip in the key head, and the key reacts by broadcasting a unique identifying code that is received by the Theft Deterrent Exciter Module, which is then used to deter theft (TDEM).

The BCM checks its memory and, if the identify code matches, it sends a fuel enable code to the PCM, which then activates the fuel pump.
The BCM is also capable of detecting an anomaly.
The car will not start if the code is lost for even a fraction of a second.
That’s why it’s always a good idea to try a different key if you’re having trouble starting your car while the security light is illuminated with PassKey III.

What goes wrong with PassKey III systems

The theft deterrence exciter module, which is the mechanism that surrounds the lock cylinder and ‘excites’ the transponder, appears to be the weak link in the system. This is a rather simple item to replace. Simple steps include removing the plastic shroud that surrounds the steering column, as well as removing and replacing the exciter. The Theft Deterrent Module, which was introduced in 2015, is the second weak point in a PassKey III system that can result in a car not starting with the security light illuminated.

Rick Muscoplat posted a blog entry on

What is a pass key III?

The Passkey III anti-theft system makes use of a transponder that is housed inside the ignitionkey’s head. When the ignition switch is turned on, the transponder is energized by the exciter located inside the ignition lock cylinder. The transponder communicates with the theft deterrent control module by transmitting a unique signature. Transponder chipkeys were first used by General Motors in 1997, but the company was slow to implement the technology. Transponders are now standard on the majority of General Motors’ vehicles.

From 1996 to 2007, some General Motors vehicles were equipped with a feature known as Pass Lock.
In your particular vehicle, the security light remaining illuminated while the vehicle is in motion indicates that the security system has failed and has been turned off.
In a similar vein, one might wonder, what exactly is pass key security.
When this occurs, the security(theft sys) light on the dashboard will illuminate at random intervals, and the car will not begin to run.
When you insert the ignition key and turn it to the on position before attempting to start the engine (crank over), the engine will not turn over.

Wait 10 minutes with the key still in the ‘run’ position, and the security light should begin to blink and then turn off. Wait 5 seconds after turning off the key.

PASS-Key® III+ Electronic Immobilizer Operation : Theft-Deterrent Systems : Features and Controls : Buick Lucerne Owners Manual : Buick Lucerne

Your car is fitted with a theft-deterrent system, the PASS-Key® III+ (Personalized Automotive Security System) from ADT. It is a passive theft-deterrent system known as the PASS-Key® III+. When the ignition key is taken from the ignition, the system is automatically activated. Neither the system nor its components must be manually armed or disarmed. If there is a problem with the arming or disarming of the theft-deterrent system, the security light will turn on to alert you. When the PASS-Key® III+ system detects that someone is attempting to start the car with the incorrect key, the vehicle will not start.

There may be a problem with your car’s theft-deterrent system if you are unable to start the engine and the security light on the instrument panel cluster illuminates while you are trying to start the vehicle.
If the engine continues to refuse to start despite the fact that the key looks to be in good working order, try another ignition key.
It is likely that your car need service if the engine will not start with the other key.
To have a new key created, take your PASS-Key® III+ to a dealer or reseller that specializes in servicing it.
See Roadside Assistance Program for further information.
It is possible to program up to ten keys for the car.
If you lose all of the keys that are presently programmed to the system or if the keys that are already programmed do not work, you must visit your dealer/retailer or a locksmith who can service PASS-Key® III+ to have new keys created and programmed to the system.

To program the new key, do the following: 1.

If the engine won’t start, take it to your local dealer or merchant for service.

After the engine has begun to run, turn the key to the LOCK/OFF position and remove the key from the ignition.

Insert the key to be programmed and turn it to the ON/RUN position within five seconds of the original key being set to the LOCK/OFF position, as shown in Figure 4.

PASS-Key® III+ keys can be replaced if they are lost or damaged. Contact your dealer/retailer or a locksmith who is familiar with PASS-Key® III+ keys to have a new key created. The key or device that disarms or deactivates the anti-theft system should not be left unattended in the car.

PROGRAMMING PASS-KEY III – Ready Remote

Notes on Installation Sheet 1 of 2 of the Installation Instructions for Document147 Additional Keys Can Be Programed GMstrong PASS /strong – strong KEY /strongstrong III /strong GMstrong PASS /strong – strong KEY /strongstrong III /strong Keystrong III /strong Pass-Key When the ignition key lock cylinder is not used in conjunction with an ignition key with a certain electrical value, the engine will be disabled.

This feature is intended to prevent vehicle theft by stopping the engine. When the ignition key is put into the ignition cylinder, the wire coils (antenna) that surround the ignition cylinder energize a transponder pellet that is housed within the plastic component of the ignition key (see illustration).

When the Pass-Keystrong III /strongmodule senses voltage in the RUN or START position, it measures the transponder value that it gets from the coil, and this information is used to determine if the key is active (antenna).

The module will send a disable message to the PCM if the value entered is not legitimate, resulting in the fuel system and starter relay being turned off for about 3 minutes, even if the vehicle is restarted with the right key.

If the transponderin the key is broken or missing, the module will transmit a disable message, but the timer will not be engaged for the next 3 minutes.

In addition to the standard black master key, which will start the vehicle and lock/unlock all doors as well as trunk compartments and trunk switch lock out, a gray valet key will start the vehicle and lock/unlock all doors but will not open trunk compartments or operate the trunk switch lock out is also available.

In order for the engine to operate properly, a password must be sent between Pass-Keystrong III /strongmodule and the PCM.
2) I turned the ignition switch to the RUN position.
When the auto-learn timer expires and the SECURITY indicatorlights go out, turn the key in the switch to the OFF position to turn the system off.
continue reading on the next page Any liability or duty deriving from errors in this material or from the use of this information for installations or for any other purpose is specifically disclaimed by DesignTech.

All Rights Reserved 2003. DesignTech International, Inc. is a privately held corporation based in the United States. DesignTech International, Inc.1-800-337-4468 4 – Page 36 – DesignTech International, Inc.

PassKey III

Hello, General Motors employees. I’m hoping that someone can assist a Ford mechanic with a General Motors inquiry. Currently, my sister’s 2000 Venture is stranded at my house due to a no start problem. She stated that the security light was on and had been on for some time. In addition, if I switch on the automobile and jump the starting, it will barely run for a split second before turning off. I discovered a sequence to retrain the key to the passkey system, but it didn’t work, and I’m not even sure whether it was the appropriate thing to do in the first place.

1.
2.
3.
4.
Repeat steps 1 through 4 a second time, totaling three cycles/30 minutes (the vehicle is now ready to relearn the Passlock Sensor DataCode and/or passwords the next time the ignition switch is switched from OFF to CRANK).
Nothing I do will be able to turn off that light or start the van.
There are no outstanding or new issues.
I’m guessing that the next step will be to replace the transponder in the steering column, but I’m not sure if it will be successful or not.
Goodbye, and thank you.

Passlock III, what is it and how does it work? [Archive]

Where can I find out more about and how to use Passlock III, and how does it work? The time now is 8:54 p.m. on August 27th, 2006. According to the owner’s handbook, PassLock III is included as standard equipment in all Aura models. Because my Chrysler had the Sentry system, which is virtually the same thing, I understand what it is telling me about the chip placed in the key. My issue is, where is the chip that is supposed to be in the key? As a comparison, a key without a chip on Chrysler goods was significantly thinner than a key with the sentry system.

Please let me know if you have any information about how this works since I am very interested.
AMI discovered your answers in a paper published by the National Highway Traffic Safety Administration.
According to General Motors, the Passlock III technology makes use of a conventional ignition key to rotate a specially programmed ignition switch to prevent theft.
It must first be established whether the electrical code stored in the ignition switch corresponds to the value recorded in the decoder module before the car may be operated.
As soon as a key with the necessary mechanical cut is put into the lock cylinder and the key is spun from the ‘RUN’ position to ‘CRANK’ position, the resistive code becomes readable by the decoder module.
According to General Motors, there are 65,534 potential password codes.
After that, the decoder module enters a tamper condition for a period of 10 minutes.

BobbyP 8:05 a.m., August 28, 2006 AMI was disconnected before I could continue my post.: upset: Passlock III makes use of the regular Saturn keypad.

When you turn the key in the ignition lock assembly, it transmits a code to a decoder module, which allows the fuel to flow and the engine to start.

Some Saturn owners who have had their vehicles for a long time may be concerned about the system’s expected lifespan.

Features and Service Guide for the New Saturn Aura Model The PASS-KEY 111 system is described in detail in the 06-00-89-040 document, which was released on August 10, 2006.

The following information is provided: ‘.PASS-KEY 111 employs a radio frequency transponder in the key that communicates with a decoder in the theft deterrent module.

They communicate with one another through the BCM, which serves as a pass-through ‘.

It appears that when the correct key was placed into the ignition switch while using Pass-Lock, the code was communicated from the ignition switch to the immobilizer.

BobbyP On August 28, 2006, at 8:10 p.m., Systems such as Passlock III and Passkey III are distinct from one another.

The RFID chip in the Passkey III is a real thing.

comcardi08-28-2006, 08:23 PM08-28-2006, 08:23 PM I really don’t want to say it.

Because of the nature of this technology, it seems that you may run the car whether you switch the ignition on or off in a regular or irregular manner.

After reading this article, I understand why the Escalade is so vulnerable to theft.

I really don’t want to say it, but I think the chip-in-key systems are preferable than the traditional ones.

As opposed to this, if the chip in the key system is not identified, the system will immediately shut off the vehicle.

Hold your horses until you learn how much those keys cost (about $75.00 uncut for each one) and that they must be programmed and purchased from a dealer.

on August 28, 2006.

Very accurate, I needed a backup key for my 300M and was informed it would cost me 80 dollars for the key and 35 dollars to program it.

Hold your horses until you learn how much those keys cost (about $75.00 uncut for each one) and that they must be programmed and purchased from a dealer.

On my recommendation, she acquired an Ion key that was cut to the same size as the original to unlock the doors, but she will be unable to start the car for $6.) My experience with the PassKey III+ system was that I had to ‘program’ a key, which simply included starting the car with the genuine key, taking it out, then starting the car with the new key until the key was programmed.

🙁 On the 29th of August, 2006, at 01:17 p.m., Pcomcardi wrote: My experience with the PassKey III+ system was that I had to ‘program’ a key, which simply included starting the car with the genuine key, taking it out, then starting the car with the new key until the key was programmed.
fdryer08-29-2006, 09:20 p.m.
Consider rfid tags for pets, EZ-PASS, anti-theft devices inserted in clothes at retail outlets, and CD covers, to name a few examples.
It then communicates codes to the computer, which the computer subsequently verifies.
BobbyP08-29-2006, 10:21 p.m.
Because the key does not have the black plastic grip molded around the metal half, it is more difficult to hold onto.
It turns out that my VUE is completely operational with the emergency key.

A replacement emergency key for my sister’s SKY has not yet been delivered to her.

Yes, in a nutshell.

All passive devices must remain such until they are within range of the transponder that activates the circuitry.

In the key, you’ll find a subminiature circuit, which is the most recent and most advanced theft deterrent available.

Essentially, General Motors discovered a technique to squeeze more circuitry into the key without expanding the size of the key.

suwanneegal At 11:21 a.m.

Thank you very much for posting the preceding topic; it provided me with valuable insight into the issue.

There is no doubt in my mind that I have an authentic key with the chip in it; it is made of black plastic with a Saturn logo imprinted on the top, and the initials ‘PK3’ are stamped on the metal section of the key as well.

So it appears that this key isn’t always transmitting the code to the computer system?

Do you have any suggestions on what I should have investigated to see if it’s the source of the problem?

Is this a reasonable assumption, or is it incorrect?

on the 8th of July.

Your descriptions appear to indicate a technical problem that would need advanced troubleshooting with the assistance of service manuals.

on the 8th of July.

Try reprogramming it (it only takes 10 seconds) or using a different key.

Each key emits a unique code, and the automobile must be aware of which key is being used.

In addition, the plus mean has a rolling code.

When the key is used to start the car the following time, the automobile must identify the key and the key must remember the random code that was supplied to it the last time it was used.

fdryer 07-09-2013, 01:37 AMA (American Medical Association) s As far as I understand it, rolling codes are only applicable to remotes and not to Passlock or Passkey (rfid).

Each one may be distinguished in a different way, although they are all used for theft deterrence purposes.

Because it is assumed that the Passkey will be the same for most years, the information should be the same.

Include a model so I can keep track of who is receiving what information.

greenman 7th of September, 2013 at 02:48 a.m.

I agree with you on everything else.

The owner’s handbook contains instructions on how to program the passkey.

onefunkar The transponder in pk3 keys is located inside the key.

If I had a key made for the old passlock system, I could easily drive your car away.

Any key can be used to unlock passlock.

fdryer 09:44 a.m.

The fact that a plain key is all that is required to operate or bypass Passlock was not lost on me.

It wasn’t advertised that it was so simple to get around Passlock’s restrictions.

As long as the average thief is unaware of the Passlock bypassing technique, the theft deterrent is effective. This version of vBulletin® is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License (2000-2022) by vBulletin Solutions Inc.

How to Disable a GM Passkey System

Image of a man driving a car taken by palm trees from Fotolia.com Some General Motors cars are equipped with a factory-installed anti-theft technology known as the passlock or passkey. Owners of General Motors cars may face difficulties starting their vehicles as a result of flaws in these built-in security systems. When this occurs, the security (theft sys) light on the dashboard will glow at random intervals, and the car will not begin to run. By conducting the ‘relearn’ technique, you may quickly disable the passkey anti-theft system and get your GM up and running.

Step 1

Folia.com has an image of a man driving a vehicle with palm trees. The passlock or passkey is a factory-installed anti-theft mechanism that is available on some General Motors cars (GM). GM owners who attempt to start their vehicles may encounter difficulties as a result of flaws in these built-in security systems. This results in the security (theft sys) light on the dashboard flashing on and off at odd intervals, and the car refusing to start. By executing the ‘relearn’ technique, you may quickly stop the passkey anti-theft system and get your GM up and running.

Step 2

Image of a man driving a car taken by palms from Fotolia.com Some General Motors vehicles are equipped with a factory-installed anti-theft technology known as the passlock or passkey. Owners of General Motors cars may encounter difficulties starting their vehicles as a result of flaws in these built-in security systems. When this occurs, the security (theft sys) light on the dashboard will intermittently glow, and the car will not start. By conducting the ‘relearn’ technique, you may quickly disable the passkey anti-theft system and get your GM up and running.

You may also permanently disable the passkey anti-theft system on your General Motors vehicle
However, the procedure for doing so differs depending on the type and year of your GM vehicle.

Biographical Information Herman Cruz has been writing professionally since 2007. He is based in Orange County, California. It is also possible to find his pieces published on a variety of content platforms, and he has also written for Internet entrepreneurs that want aid with the creation of sales letters and articles for their companies. A Bachelor of Arts in integrated composition, improvisation, and technology is being pursued by Cruz, who is a student at the University of California, Irvine.

In order to prevent car theft, the PassLock system disables gasoline to the engine if an attempt is made to start the vehicle without the proper key. In addition to increasing the degree of protection, PASSLock does so while maintaining the simplicity of servicing and low costs associated with typical ignition lock systems. PassLock’s security is embedded into the lock itself, as opposed to the General Motors’ PASSKey I/II, VATS, PASSKey III, or keyless systems, which are all dependent on an additional key or device.

It is not necessary to program the PASSLock-equipped car in order for it to accept additional keys.
General Motors launched the PASSLock ignition lock for the 1995-1/2 model year, which was the first ignition lock to be fitted with a magnet installed inside the ignition lock cylinder and a matching Hall-effect sensor mounted into the ignition lock housing assembly.
The sensor electronically communicates with the vehicle’s on-board computer, and the fuel supply is maintained if the electronic value obtained by the sensor matches the code recorded in the vehicle’s on-board computer If the values do not match, the fuel supply is cut off immediately.
It is the design of the PASSLock system that hard rotation will generally destroy the electronics, rendering the car immobile in most cases.
Note: After the engine is started, the PASSLock System’s theft deterrence feature shuts out the gasoline injectors, therefore preventing theft.
The engine will then come to a complete stop.
PassLock ignition locks are available in three primary styles: modular, modular in-dash, and CSS.

When selecting a replacement ignition lock, double-check that the component number matches the year, make, and model of your vehicle.

In most cases, installing the improper ignition lock will result in the car being unable to be used.

This depends on the year and the model.

These ignition locks do not require any wire to be connected, and neither do the CSS ignition lock cylinders that are included with the lock.

Replacement locks do not have a sensor value associated with them.

The vehicle must be set to accept the new lock.

Only the plug needs to be changed.

To reprogram the PASSLock I ignition lock, follow these steps: Step 1.

A one-in-ten possibility exists that the vehicle will start.

Continue to operate the vehicle with the ignition in the ON or RUN position.

Step 4.

It is possible to start the automobile.

The following programming process should be followed to the letter.

After reinstalling the lock, try to start the car using a key that has been properly cut.

Secondly, if the new lock does not correspond to the electronic value stored in the vehicle’s computer, an indicator light on the instrument panel will begin blinking, and the vehicle will be rendered inoperable.

Step 4: The light will stop flashing and turn off after roughly 10 minutes.

Step number six.

Step number seven.

Step number eight.

The onboard computer has been set to accept the signal from the new lock at this point.

On rare occasions, a car equipped with PASSLock will experience difficulties starting.

It is impossible for PASSLock to generate this circumstance if the car would not crank.

The instrument panel of the majority of PASSLock-equipped automobiles contains a telltale sign.

In order to avoid confusion, a ‘No Start’ condition should not be mistaken for a PASSLock System error.

Buick Rainier (2002, 2003 model years) Buick Skylark (model years 1995, 1995-1/2, and 1996) Cadillac Escalade (model years 1998-2004) Chevrolet Cavalier Z24 from 1995 to 1995 1/2 Chevrolet Cavalier (model years 1995-1/2-2004) Chevrolet Cobalt (2004 model year) Chevrolet Impala (model years 1998-2004) Chevrolet Malibu (from 1996 to 2003) Chevrolet Monte Carlo (model years 2000-2005) Chevrolet Astro Van (model years 1996-2004) Van model years 2002-2005: Chevrolet Express The Chevrolet Full-Size Pickup was manufactured in 1997 and 1998.

Chevrolet S-10 Blazer (from 1996 to 2003) – From 1997 through 2004, the Chevrolet S-10 pickup truck was available.

Chevrolet Suburban (model years 1997-2002) Chevrolet Tahoe (model years 1998-2005) Chevrolet Trailblazer is a mid-size pickup truck manufactured by Chevrolet.

1997-2003 GMC Sierra 1500 GMC Sonoma pickup truck from 1997 to 2003 GMC Suburban (from 1997 to 2002) From 1997 to 2000, GMC Vandura/Rallye GMC Yukon from 1996 to 2003 Hummer H2 from 2001 to 2003 Hyundai Hombre (from 1997 to 2001) The Isuzu Ascender was produced between 2002 and 2004.

Oldsmobile Bravada (model years 1997-1999) Oldsmobile Cutlass (model years 1996-1998) Oldsmobile Intrigue (model years 1997-1999) Pontiac Grand Am (from 1995 to 2002) Pontiac Sunfire/GT (model years 1995-1/2-2004) Saturn Ion from 2001 to 2003 Saturn L300 (model years 2000-2003) Saturn Vue (model years 2000-2003)

Issue with Passkey III / Relearn fail

First and foremost, I would want to express my gratitude to the administrators for keeping such a wonderful forum running. There is an abundance of useful information available on this website. In light of the foregoing, I have investigated the forums but have not been able to uncover anything specifically related to my situation. Chevrolet is the manufacturer. Model: HHRyear of production: 2007 I’m currently working on a car for a friend. Her ex-boyfriend attempted to disable her vehicle’s ignition completely in an attempt to gain unauthorized access to the vehicle.

Despite the fact that some of the wires were striped, it is difficult to tell what he was attempting with them.
I reconnected all of the wires with high-quality butt splice connectors and heat shrink, and I replaced the transponder pick-up with a new part that I purchased from the dealership to complete the repair.
It should go without saying that the anti-theft system was activated during this process.
The security light does not turn off while the 10 minute on/off cycles are being performed.
The vehicle will not start as long as the security light is illuminated.
Could it be that the splice connectors I used to make the connections caused the circuit to fail?
I’ve attempted to reset the computer by disconnecting the battery as well as other methods.
Thank you for your time.

GM Security Relearn Procedure

Vehicle Thief Deterrent (VTD) systems are available in three different configurations on General Motors cars, each needing its own set of reconfiguration procedures. After the PCM has been changed, the car will not start unless the following steps are followed exactly as directed. The three systems are as follows: Vehicle Anti-Theft System (VATS), Passkey, Passkey II –resistive chip ignition key, Passkey III –resistive chip ignition key Passlock — a cylinder with a code. Passkey III is a transponder ignition key that works with a transponder.

Simply have a glance at the keys (see page 4).
Resistive chip ignition key (VATS, Passkey, Passkey II) Vehicle Anti-Theft System (VATS) – The Vehicle Anti-Theft System (VATS) is comprised of a separate module known as the Theft Deterrent Module (TDM), which checks the resistive chip in the ignition key for validity.
When replacing the PCM in a vehicle equipped with VATS, there is no need to retrain the driver.
If the resistance value detected by the TDM matches the value expected by the TDM, the TDM will send a signal to the PCM alerting the PCM that a valid key is present, and the PCM may proceed to start the car as a result of the signal.
Passkey II – The Theft Deterrent Module (TDM) function is housed in the Body Control Module of the Passkey II system (BCM).
Upon determining that the resistance reading by the BCM is consistent with what the BCM expects, the BCM will send a message through serial data to the PCM alerting the PCM that a valid key is present and that the PCM may begin the vehicle’s ignition.
The battery will be utilized for 30 minutes while the alternator is not accessible to charge the battery during this time.

Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged. Both the BCM and the PCM must be in operation and communicate with one another at all times.

Turn the ignition key to the ‘ON’ position after inserting it. Don’t even bother trying to start the engine. Allow for approximately 11 minutes of operation with the key in the ‘ON’ position. During the 11-minute time, the security light will remain on or will flash continuously. Please do not proceed to Step 2 until the security light has been turned off or has stopped flashing. For 30 seconds, turn the ignition switch to the ‘OFF’ position. Activate the ignition switch by pressing the ‘ON’ button as in Step 1 for 11. For 30 seconds, turn the ignition switch to the ‘OFF’ position. Step 1: Turn the ignition switch to the ‘ON’ position for 11 minutes for a third time, just like in Step 1. For a third time, turn the ignition switch to the ‘OFF’ position for 30 seconds while driving. For 30 seconds, turn the ignition switch to the ‘ON’ position. Set the ignition switch to the ‘OFF’ position. Make an attempt to start the

The relearn process is complete if the engine starts and operates properly. Passlock — a cylinder with a unique code. The Passlock anti-theft mechanism requires the presence of a key in the lock cylinder in order to be activated and function properly. The lock cylinder is comprised of a stationary Hall effect sensor and a spinning magnet that work in conjunction. Whenever a key is rotated in the lock cylinder, the magnet generates a signal on the Hall effect sensor, which is then detected. This is followed by transmission of an encoded signal to the instrument panel cluster (IPC) or body control module BCM via the cylinder.

If the IPC/BCM receives the expected coded signal, the IPC/BCM will start the vehicle.

The battery will be utilized for 30 minutes while the alternator is not accessible to charge the battery during this time.

Both the IPC/BCM and the PCM must be operational and in constant communication with one another.

Turn the ignition key to the ‘ON’ position
Attempt to start the engine and then release the key to the ‘OFF’ position
Keep an eye out for the ‘SECURITY’ sign. It will turn off after 10 minutes if the ‘SECURITY’ indicator light is not used. Wait 10 seconds after turning the ignition to the ‘OFF’ position. The engine should be started by pressing the ‘ON’ button and then letting go of the key. Keep an eye out for the ‘SECURITY’ sign. It will turn off after 10 minutes if the ‘SECURITY’ indicator light is not used. Wait 10 seconds after turning the ignition to the ‘OFF’ position. The engine should be started by pressing the ‘ON’ button and then letting go of the key. Keep an eye out for the ‘SECURITY’ sign. It will turn off after 10 minutes if the ‘SECURITY’ indicator light is not used. Wait 10 seconds after turning the ignition to the ‘OFF’ position. The new password has been memorized by the vehicle. Begin with the
Remove any issues that have arisen using a scan program

NOTE: For the majority of automobiles, a single 10-minute cycle will be sufficient to train the vehicle on the new password. If the automobile does not start after one cycle, repeat the process until it does. The majority of vehicles will require all three rounds in order to discover the password. Passkey III is a transponder ignition key that works with the Passkey II. The Passkey III anti-theft technology works by embedding a transponder in the head of the ignition key’s key cylinder. When the ignition switch is turned on, the transponder is energized by the exciter located inside the ignition lock cylinder.

To determine whether or not the key signature supplied is acceptable by the theft deterrent control module, the theft deterrent control module will transfer the fuel enable password to the powertrain control module (PCM).

In order to execute a relearn on a Passkey III system, ensure that the vehicle’s battery is completely charged.

Connect a battery charger to the battery to guarantee that power is accessible for programming while the battery is being charged.

Keys for other vehicles can be learnt immediately after the first one has been taught by inserting the new key and flipping the ignition switch to the on position within 10 seconds of withdrawing the previously learned key from the vehicle.

Insert a master key (with a black head) into the ignition and turn it on. Turn the key to the ‘ON’ position without turning the engine on or turning it off. The security light should be activated and remain on
Wait for 10 minutes, or until the security light goes on, before proceeding. For number 5, turn the key to the ‘OFF’ position. Turn the key to the ‘ON’ position without turning the engine on or turning it off. The security light should be activated and remain on
Wait for 10 minutes, or until the security light goes on, before proceeding. To turn the key to the ‘OFF’ position, press it twice. During the following start, the critical transponder information will be learned
Begin by completing the Relearning is accomplished if the vehicle starts and operates normally after being stopped for a while. If there are any extra keys that need to be learned: Set the key to the ‘OFF’ position
Insert the key that will be used next. Immediately after removing the previously used key from the ignition, turn the key to the ‘ON’ position. Wait for the security light to illuminate. It should be completed rather shortly. It is possible that you will not see the lamp since the transponder value will be learned almost instantly

Steps 12 through 14 should be repeated for any additional keys. What system do you have and how can you tell – Take a look at the keyboard. Passkey and Passkey Pro are not featured, however they are extremely similar to VATS and Passkey Pro

Passkey 3 Help Needed!

It is most likely your ignition cylinder that is malfunctioning. That is the most frequently encountered issue with these passcode schemes. There are two wires that travel to your ignition cylinder and are used to read the resistance of your key. Assuming the resistance is correct, the computer will send a signal to your anti-theft relay switch, which will then activate a connection that runs from your ignition switch through your transmission selector (to confirm whether it is in park or neutral), and then on to another relay, which will send power to your starter, causing it to turn over.

Typically, the ignition cylinder is the source of the problem; they are inexpensive to purchase but costly to install.

The best course of action is to get a Chiltons handbook and follow the instructions in it.

In any case, you will still want the key in order to launch it.

The first option is to locate your theft deterrent relay and bypass it.

Locate the two wires that are connected together by the relay, and splice them directly together.

(It was my brother and I that wrecked his Camaro.) 3.Read the resistance on the key chip and splice an identical resistor to the wires that connect it to the ignition cylinder (option three).

If you find a local tuner, he or she may adjust the engine’s security shut down function to prevent it from being activated (what my brother and I had done to his Camaro).

Locks and alarms will continue to function, but you will no longer be required to use a special (chipped) key to start them; you will still require your key, but it will not have a chip in it.

Personally, I would have chosen the resistance instead of the capacitor as a bypass.

Best of luck.