How does a GM PassLock work?
Then GM changed to the PassLock system. See the resistor pellet on the shaft of the key to the left of the plastic. The first generation PassKey systems incorporated a resistor pellet into the head of the key. The resistor made contact with terminals in the lock cylinder and the system read the resistance value of the resistor pellet.
Is it common for GM cars to have PassLock problems?
However, it isn't uncommon for GM car owners to experience glitches with their passlock system when trying to start their vehicle. When this occurs, you will see the security (Theft Sys) light being displayed randomly, plus you won't be able to start your vehicle.
How do I know if my car is PassLock equipped?
Most PASSLock-equipped vehicles have a telltale indicator in the instrument panel. When a PASSLock-equipped vehicle is being started, the instrument panel warning light for PASSLock remains on until the engine starts. For this reason a “No Start” condition should not be confused with PASSLock System fault.
What is a PassLock ignition lock system?
Aug 1st, 2005 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.
Can you disable passlock?
The easiest way to bypass the Passlock 2 system is to place a resistor between the passlock sensing wire and the ground reference wire. To find these wires, look for three wires that at some point are wrapped together, coming from the ignition barrel. Usually, they are orange/black, red/white, and black.
What does the passlock do?
Passlock uses a coded lock cylinder that essentially stops the engine from running until the proper key is detected. When the key is inserted into the ignition, a magnet on the cylinder creates a signal to the ECM (engine control module) that essentially says everything is ok to start and run.
How do I bypass passlock system on GM cars?
9:5911:10How to Override Bypass GM VATS Passlock 1 2 Passkey Anti Theft ...YouTubeStart of suggested clipEnd of suggested clipLeave your key on for a half an hour. Okay after that time elapses turn your key off turn your carMoreLeave your key on for a half an hour. Okay after that time elapses turn your key off turn your car back on your car will automatically learn this new resistance.
Where is PassLock sensor located?
the passlock iii system uses a transponder located under the plastic covering of the key. in most cases, these keys are stamped "pk3" on the metal blade near the plastic covering.
Does passlock disable fuel pump?
Yes, the fuel pump should still run even if there is a passlock issue.
How do I reset my passlock?
0:422:04GM Security lockout reset procedure - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe security key into the system. So we're gonna leave the car sit with the ignition turned on itsMoreThe security key into the system. So we're gonna leave the car sit with the ignition turned on its gonna take about ten minutes and the security light will eventually stop flashing.
How do I get my GMC out of theft mode?
1:031:58Override theft deterrent mode GM Yukon, Tahoe, suburban ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd there's a really simple fix for this and so what you want to do is just pop the hood. Okay weMoreAnd there's a really simple fix for this and so what you want to do is just pop the hood. Okay we just took a 10 millimeter wrench here put it on the battery terminal. And loosen that up.
How do I know if my car is in anti theft mode?
Most modern cars have a dash light that indicates that the anti-theft system has been triggered. The icon for the anti-theft system looks like a car and a lock combination.
Can remote start bypass PassLock?
This module bypasses the passlock and allowed the vehicle to remain running after the remote start has been activated. Without it, on most GM vehicles, the vehicle will start with the remote start but will die a second or two later.
How do you tell if you have PASSLock?
Most PASSLock-equipped vehicles have a telltale indicator in the instrument panel. When a PASSLock-equipped vehicle is being started, the instrument panel warning light for PASSLock remains on until the engine starts.
How do I relearn my GM key?
Relearn procedure: Insert ignition key and turn to the ON position. Do not attempt to start the engine. Leave the key in the ON position for approximately 11 minutes. The security light will be on or flashing for the 11-minute period.
What does it mean when the security light flashes?
The security light on your dashboard is an indicator for the car's anti-theft system. It serves two main purposes: When the engine is off: In some cars, the security light flashes when the ignition is off to show that the security system is active.
How does a pass lock work?
The PassLock system works when the lock cylinder moves a magnet past a Hall effect sensor.
What system did GM use to detect if someone was trying to steal my car?
GM used two strategies to determine if someone was trying to steal the vehicle. The early systems used the first generation PassKey system. Then GM changed to the PassLock system.
What happens if a car is yanked by a lock cylinder?
If the code is correct, the PCM will allow the car to start and run. However, if the thief yanks the lock cylinder, it removes the magnet as well , so the sensor can’t detect the magnet movement.
Does GM have anti theft?
GM has used a variety of anti-theft systems on their vehicles. When you get a no start, intermittent start, or start then die, you should first determine which GM anti-theft system you have. Then diagnose the anti-theft system before you start replacing starting components. A tell-tale sign that you’ve got an anti-theft problem is ...
What is a Passlock I?
The Passlock I system is considered the replacement for the GM Vehicle Anti-Theft System (VATS). The Passlock II and III (PK3) systems followed shortly after the introduction of the Passlock I system. The Passlock family of anti-theft systems are still in use today.
Where is the PK3 key located?
In most cases, these keys are stamped "PK3" on the metal blade near the plastic covering. An antenna located at the entry point of the ignition lock cylinder reads the transponder data from the key and sends a code to the Passlock control module.
When was the first passlock system introduced?
In the mid 1990s , the first Passlock systems were introduced and are still used to this day. The Passlock I and Passlock II systems use a sensor in the ignition lock cylinder, which looks for proper rotation of the lock cylinder with the correct key. Upon successful rotation of the ignition lock cylinder, a code will be sent to the Passlock module.
How long does it take to reprogramme a Passlock?
Reprogramming Passlock with a learning procedure. The Passlock family has two basic relearn procedures - a ten-minute procedure and a thirty-minute procedure - and which one you use depends on the system and what components have been replaced.
What is the purpose of a permanent magnet in a lock cylinder?
The permanent magnet in the lock cylinder provides a magnetic interferance in the sensor proportionate to the strength of the magnet. This resistance lowers the voltage output to the reference wire by a certain amount, also proportionate to magnet strength.
How to turn off the security light on a Honda Civic?
Wait several seconds, then turn the switch to 'Start' for several seconds, then release the key back to 'Run'. The security light should be on/blinking. 2) Wait approximately 10 minutes for the light to turn off.
How does an ignition cylinder work?
The ignition cylinder works like a standard ignition, engaging the rotary switch with the end of the cylinder. Once removed, the ignition switch itself can be positioned by inserting and turning a screwdriver inside the cylinder casing.
Can you bypass Passlock II?
Also contrary to popular belief, it is possible to bypass the Passlock II system if you have lost the proper key, although it requires time and effort based on certain skills, and will permanently damage the lock cylinder and probably the casing. This method should only be used when all other methods are exhausted.
Is a GM Passlock a transponder?
The GM Passlock is not a transponder system. It uses a previously a normal metal key and recorded voltage measurement through a Hall Effect sensor to determine if the lock cylinder is aligned and in place during vehicle starting. This is the only security affect provided by the system.
What is a passlock sensor?
Passlock sensor errors are preventing owners from using their cars. Temporary fixes are a pain in the butt, but permanent solutions can get quite expensive. Passlock is an immobilizer introduced by GM in many mid-to-late 1990’s vehicles. Immobilizers are “electronic security device fitted to an automobile that prevents the engine ...
How much does it cost to replace an ignition lock cylinder?
Replacement cylinder with new sensors can cost, with labor, as much as $450. Bypassing the sensor will void any warranty, but since most of these vehicles are out-of-warranty at this point that might not be of any concern.
How long does it take for a car to reset its passlock?
Wait until the "Theft Sys" light on your dashboard stays on without blinking. 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. 00:00.
What to do if your passlock keeps giving your problems?
If your passlock system keeps giving your problems, it may be broken and you will need to take it to the dealership. You can also have a mechanic disable the passlock system to prevent from being stranded in future occasions. Based in Orange County, Calif., Herman Cruz has been writing since 2007.
How to start a car with a key?
Step 1. Insert your key in the starter, start you car as you usually would and let it stall. Keep the key in the "On" position. In other words, don't turn the key back to the "Off" position . You will know the key is in the "On" position because you can use the A/C, radio and see all the lights on the dashboard when it is in the "On" position.
Does GM have a passlock?
A wide variety of GM cars come with a passlock theft system feature that is meant to keep GM cars from being stolen. However, it isn't uncommon for GM car owners to experience glitches with their passlock system when trying to start their vehicle.
Passlock Versus Passkey
Passlock
- PassLock systems are based on the theory that car thieves will use a slide hammer to yank the lock cylinder out of the housing and then try to turn the ignition switch with a needle nose pliers. The PassLock system works when the lock cylinder moves a magnet past a Hall effect sensor. The sensor then sends a signal to the control, which GM has move...
Passkey III
- In PassKey III, GM incorporated a transponder into the key head. As the driver moves the key towards the lock cylinder, a transmitter sends an interrogation signal to the transponder key. The transmitter is located in a ring surrounding the outer edge of the lock cylinder. The transponder receives the interrogation signal and responds with a coded message. The message is check fo…
Passlock
- Testing this system is similar to the Passkey I and II systems. You want to check the voltage at the bottom of the steering column as you insert the key and rotate it check the yellow signal wire (should be 5 volts before you start the testing). Turn the key. The value should drop. If it does not, you will have to replace the key cylinder. The “control module” for this system is built into the ins…
Passkey III
- You cannot check this system with an ohmmeter. You will need a scan tool to watch the operation of the system and find the trouble code. Once you get the trouble code, follow the diagnostic procedure based on the specific code. Some companies make PASSLOCK OVERRIDE SYSTEMS. I don’t have any experience with them. © 2012 Rick Muscoplat