Question about 1999 Pontiac Grand Am GT

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Security light flashing and not allowing start of car. Passlock problem.

Securoty light flashing and not allowing start of car. Passlock problem.

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It is your locks. I would just disconnect them and lock the car manually. Its a common problem on most GM cars cause water got in an rusted the auto lock motor cause them to send the wrong signal to the computer.

Posted on May 13, 2009

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Why does the battery/security light flashing in message center? Bad Passlock Ignition Sensor? How to diagnose bad Passlock Ignition Sensor? Have to perform 10min RELEARN PROSS. to start engine.


I read your problem, and I think Reliable-Store has the solution of your problem, Just visit the link I attached here, I'm sure you will get the solution of your problem forsure. Best Manuals

Mar 17, 2017 | Cars & Trucks

1 Answer

Wont start passlock not on got jump it starts then wont start got another jump wont start tried passlock relearn lites gagues work got jump it starts it wont start again wit jump took battery in itsok


Need to turn off passlock - Chevrolet - iFixit

https://www.ifixit.com/Answers/View/.../Need+to+turn+off+passloc...

iFixitThose of you that have stalling problems, it is not passlock. ... traction fault on the display when it shuts down or won't start and have to wait my 10 min to restart.

GM Passlock Security Light Issues - RepairPal

repairpal.com/gm-passlock-security-light-issues
If you find yourself stranded, your engine won't start, and the security light is flashing, ... The most common repair is to replace the ignition lock cylinder or Passlock ... The warning light on the VATS system is similar except it does not have the ...

No Start Due to Failed Passlock Sensor : Pontiac Grand Am ...

repairpal.com > Problems > Pontiac > Grand Am

Dec 05, 2015 | Cars & Trucks

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I have a Saturn 2001 4door s series the security light is on and won't start what can I do


Passlock
The passlock system is a vehicle theft deterrent system which deters drive-away vehicle theft by disabling engine operation if the ignition lock cylinder is not rotated with the proper mechanically cut key.
The passlock system is made up of an ignition switch assembly, passlock sensor, body control module (BCM), instrument panel cluster (IPC), and a powertrain control module (PCM).
The ignition switch contains a magnet mounted on the lock cylinder and a passlock sensor assembly which consists of security hall effect sensor, tamper hall effect sensor, and output resistors. A drill proof metal shield is also staked over the sensor housing.
The passlock sensor mounted to the ignition switch assembly is located inside the upper right side of the steering column. The passlock sensor contains two hall effect sensors: a tamper hall effect sensor and a security hall effect sensor. The tamper hall effect sensor is mounted on top of the security hall effect sensor. Should someone attempt to defeat the system by use of magnetic experimentation, the tamper hall effect sensor will activate first.
The BCM has the passlock controller integrated into it which controls the majority of the security systems logic. The BCM reads the data from the passlock sensor continuously. If the data is correct and has been received by the BCM within a specified time, the BCM will send a coded password to the PCM. The PCM will then allow the fuel injectors to operate.
The coded password for the security system is sent from the body control module to the PCM via the class 2 data link. If the password is correct and received within the specified time, the PCM will allow the fuel injectors to operate.
The IPC contains the security telltale. The security telltale has three modes of operation, OFF, FLASHING, and ON.
SECURITY TELLTALE will be off if:
?€¢
Ignition is in the OFF position


?€¢
Ignition is in the RUN, START, or ACC position and security system diagnostics have all PASSED

SECURITY TELLTALE will be on if:
?€¢
The BCM is performing a bulb check at vehicle start


?€¢
Security system diagnostics have not yet completed at vehicle start


?€¢
A security system diagnostic trouble code (DTC) is set in the BCM or PCM

SECURITY TELLTALE will be flashing if:
?€¢
The tamper hall effect sensor has been triggered


?€¢
Incorrect passlock sensor data to BCM for more than 5 seconds during vehicle start


?€¢
No passlock sensor data to the BCM for more than 5 seconds during vehicle start


?€¢
Incorrect password from the BCM to the PCM after 5 seconds during vehicle start

Oct 23, 2015 | Saturn Cars & Trucks

4 Answers

How to reset security ignition on a 1999 chevy silverado?


There is a lot of info on this site that you can read up on. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sep 07, 2014 | 1999 Chevrolet Silverado 1500

2 Answers

Hello. I have a 2004 Monte Carlo SS. Just recently, I have experienced my car not starting. I have had ONSTAR do a Diagnostic test from my car, while I am in it, and it comes back fine. What happens is, I...


Read the following paragraph from GM, this will give you some insight on the passlock system on your vehicle.

The electrical switching portion of the ignition lock cylinder assembly is separate from the key and lock cylinder. The electrical switch portion and the key and lock cylinder synchronize and work in conjunction through the action of the mechanical assembly between the two components.

PASSLOCK(TM) SENSOR
The Passlock(TM) sensor contains 2 hall effect sensors. The tamper hall effect sensor is on the top. The security hall effect sensor is under the tamper hall effect sensor. Both of the hall effect sensors monitor the magnet of the lock cylinder through an opening. The tamper hall effect sensor is physically placed on top of the security hall effect sensor. This arrangement enables the tamper hall effect sensor to engage first if an intruder attempts to bypass the Passlock(TM) sensor by placing a large magnet around that area of the steering column. There is a tamper resistor inside the Passlock(TM) sensor in order to help prevent tamper to the system. Passlock(TM) equipped vehicles have a selection of 10 different security resistors ranging from 0.5K ohms up to 13.6K ohms . Installing one of the security resistors inside the Passlock(TM) sensor will generate a unique Passlock(TM) code. All 10 combinations of the Passlock(TM) sensor have the same part number.

BODY CONTROL MODULE
The body control module (BCM) contains the theft deterrent system logic. The BCM reads the Passlock(TM) data from the Passlock(TM) sensor. If the Passlock(TM) data is correct, the BCM will send a class 2 message to the PCM to enable the fuel injectors and crank relay.

During the tamper mode the vehicle may start. The vehicle will then stall. If the BCM receives the wrong Passlock(TM) data, the VTD system will immediately go into the tamper mode. The tamper mode will lock-out the vehicle fuel injectors and crank relay for 10 minutes . The SECURITY indicator will flash while the VTD is in the tamper mode.

If the Passlock(TM) sensor sends a correct password to the BCM when the ignition is in the ON position, the BCM will send a fuel enable and crank relay enable signal to the PCM.

SECURITY INDICATOR
The SECURITY indicator appears on the message center inside the instrument cluster. If the SECURITY indicator flashes or if the SECURITY indicator lights continuously during vehicle operation, refer to the system diagnosis.

POWERTRAIN CONTROL MODULE
The PCM communicates with the BCM over the Class 2 serial data line. When the BCM determines an incorrect password, it sends a Class 2 serial data password to the PCM in order to disable the crank relay and fuel injection system. If the BCM receives the expected voltage from the Passlock(TM) sensor, the BCM sends a class 2 serial data password to the PCM in order to enable the crank relay and fuel injection system. The PCM then allows the vehicle to start normally.

FUEL LOCKOUT CYCLE
The Passlock(TM) system has a lockout cycle of approximately 10 minutes . Once the vehicle is in the lockout cycle, the vehicle remains in the lockout cycle for 10 minutes , even if the ignition switch is turned from the ON position to the OFF position.

The Passlock(TM) system uses the lockout cycle in order to synchronize all of the Passlock(TM) components when any Passlock(TM) related part is replaced. The Passlock(TM) system requires 3 consecutive lockout cycles in order to complete the 30 minute learn procedure for a changed component.

CHANGING THE PASSLOCK(TM) COMPONENTS
The design of the Passlock(TM) system is to prevent theft even if the various theft deterrent parts change. The parts that can no longer be changed without the possibility of going into a tamper mode are:

* The Passlock(TM) sensor
* The BCM
* The PCM

If you replace any of these parts the vehicle may not start for 10 minutes . This is the long tamper mode. If this occurs, the system must go through a long tamper mode cycle. During this time the SECURITY indicator will be flashing for the full 10 minutes and DTC B3031 will be set. The BCM and the PCM require the full 10 minutes in order to complete a learn cycle. The ignition switch must remain in the ON position until the SECURITY indicator stops flashing. You will need to repeat the cycle if the ignition switch does not remain in the ON position. When replacing any of the above parts, perform the Programming Theft Deterrent System Components procedure.

The design of the Passlock(TM) 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 ignition lock cylinder. The Passlock(TM) sensor monitoring the position of the lock cylinder will relay the Passlock(TM) data to the body control module (BCM). The BCM will determine the validity of the Passlock(TM) data. The BCM will send a password to the powertrain control module (PCM). When the PCM receives the correct password the PCM allows the crank relay and fuel injectors to operate normally. The Passlock(TM) system requires the PCM and the BCM to communicate the various functions in order to operate. These functions transmit over the class 2 serial data line. For an explanation of the class 2 serial data description and operation refer to Data Link Communications Description and Operation in Data Link Communications.

Jul 19, 2011 | 2003 Chevrolet Monte Carlo

2 Answers

My trail blazer 2006 wont start and it has a light on of a car with a lock what does this mean heeelp please as soon as possible emergency


You have now experienced GM's terrible anti theft security system. These systems are known for failing and will cost you an arm and a leg to fix. Anywhere from $350 - $700 plus labor. Most mechanics wont even touch these "PASSkey" security systems.You'll have to go to a Dealer mechanic. The good news is that you can bypass these systems permanently. And you're vehicle is one of these lucky ones that CAN be bypassed. This link should help you find what you need and help inform you of how this system works.

http://vatspasslockpasskeysecurityhelp.yolasite.com/ TRAILBLAZER 2002 2003 2004 2005 2006 2007 2008 Effected by Passlock/PASSkey Failure. tayjoejoe_17.jpg

Jul 11, 2011 | 2006 Chevrolet Trailblazer

1 Answer

Starter will not engage...no fire from the ignition to the starter.


make sure the security kight is not flashing. if it is could be passlock sensor not allowing voltage to the starter circuit. if the security light is not flashing , need to check for start signal at the transmission range switch.

Jun 20, 2011 | 2001 Chevrolet Venture

2 Answers

The car fires but stops immediately


I had a problem with a 97 Achieva recently.Someone else replaced the PCM/ignition switch and passlock sensor.I replaced the ICP.Engine would turn over but wouldn't start and the security lamp was dim and flashing and then it would go solid.I tried the wait 10 minutes thing but,the light would never go off! I put the original passlock sensor back onto the lock cylinder. But this is what fixed the problem.I cleaned the contacts on the black wires and green on the ignition switch with tv tuner cleaner! After I cleaned those contacts the security light was flashing brightly.So I turned the key to run and left it there.After a few minutes it stayed on solid.I waited about 10 minutes but the light never went out.So I turned off the switch and then tried starting.It started right up and the security lamp flashed and then went off.Has started every time since.Note:I also scraped the pins that I cleaned with the cleaner with a knife.

Nov 11, 2009 | 1997 Oldsmobile Achieva

1 Answer

2000 Pontiac Grand Am -- Security light/Passlock -- Engine turns over but won't start & the security light flashes. This has happened twice in the last 3 months. Do anyone know if this type of problem...


there is a way to bypass the system we do it often but you will need to buy a data bypass unit to install in order to bypass the passlock sensor in the dash. Once the unit is installed, it is turned on by inserting the key into ignition, then the unit will send the proper code to the BCM allowing it to unlock the ECM and then car will start.

Aug 30, 2009 | 2000 Pontiac Grand Am GT

2 Answers

Security light flashing and car won't start now


does it start at all, or does it run for about 1 second and shut off? if the latter, then it's the passlock system, and he could have a defective key or security module. the keys have a predetermined resistance value which activates the passlock system to prevent hotwiring. If it is the passlock system, then sometimes you have to wait 15-20 mins for it to reset before starting the engine.

Jun 20, 2009 | 1998 Oldsmobile Achieva

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