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Disable passlock system

Car will not start and pass lock flashes in dash

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I installed a new steering column in my 2004 Pontiac sunfire and now it will not start. It tries then I beta back fire.


Anti-theft system isn't allowing it too .
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
• The ignition switch
• The body control module (BCM)
• The security indicator on the instrument cluster
• The powertrain control module (PCM)

Feb 05, 2017 | 2004 Pontiac Sunfire

1 Answer

02 olds alero no start system shut down


Where did you try to by-pass at , with the 2000 ohm resistor ? Is the SECURITY light lit on the instrument cluster ? Probably has another problem other then the key . The anti-theft system in your vehicle can not be by-passed by using a resistor .

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.

Your best bet , take it to a qualified repair shop . Before you render it unfixable . (cost to much )

Jan 26, 2017 | 2002 Oldsmobile Alero

1 Answer

2002 suburban start and dies, its not the fuel pump. what is it


Is there a security lamp on the dash that is on or flashing? Any applicable trouble codes? My info shows you have passlock, usually a fuel injector disable, only, may start and stall. If vehicle starts and stalls, leave key in the on position, If security lamp does not flash, the passlock system should not be at fault.

Dec 16, 2016 | 2002 Chevrolet Suburban

1 Answer

Where is the alarm controll box on the 03 malibu


Alarm box ? You mean anti-theft system ?
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


?€¢
The ignition switch


?€¢
The body control module (BCM)


?€¢
The security indicator on the instrument cluster


?€¢
The powertrain control module (PCM)


Body Control Module (BCM)
The body control module (BCM) contains the logic of the Theft Deterrent System. The BCM provides the battery positive voltage to operate the Pass lock" sensor. The BCM also measures the voltage of the security sensor signal circuit. The voltage measured will indicate whether the Pass lock sensor has been activated and whether the resistance value from the sensor is a valid value or the tamper value. If voltage measured is in the valid range, the BCM compares this voltage, voltage code, to a previously learned voltage code. If the voltage codes match, the BCM sends a class 2 message containing a password to the powertrain control module (PCM). If the voltage codes do not match, or the voltage is in the tamper range, or there is a circuit fault, the BCM will not send the correct password to the PCM, and the vehicle will not start.
there is nothing you can do , if your vehicle won't start you need to take it to the dealer or a ASE certified repair shop. Messing with the anti-theft system may render your vehicle useless .
There

Mar 03, 2016 | Cars & Trucks

1 Answer

What most i do when my 2002 chevy avalanche security light keep flashing


Take it to the dealer or a ASE certified repair shop .or go on youtube an check out videos on anti-theft by pass for GM vehicles .There are a few different type's . VATS , pass key 1,2 or three . Being yours is a 2002 model year it isn't the VATS .
Passlock™ System
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.
The design of the Passlock™ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the PASS-Key® system. However, the Passlock™ system eliminates the need for a key mounted resistor pellet. The components of the Passlock™ system are as follows:
• The ignition lock cylinder
• The ignition switch
• The Passlock™ sensor
• The Body control module (BCM)
• The security telltale
• The vehicle/powertrain control module (VCM/PCM)

Feb 18, 2016 | Cars & Trucks

1 Answer

I changed the dash.now security light is flashing and it will start but shuts off after 2 seconds. help?


Its the passlock system , the best thing to do is disable it with the many boxes available online for less that 20 dollars or , you can resistor it out at the computer see passlock disable on youtube

Jan 05, 2016 | 1998 GMC Sierra

1 Answer

Why does the anti-theft light stay on?


There is a problem with the system an there is a DTC - diagnostic trouble code stored in the body control module !
The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is engaged by the correct mechanical key. The theft deterrent system uses the following 4 components for theft prevention:
?€¢
The lock cylinder


?€¢
The ignition switch


?€¢
The body control module (BCM)


?€¢
The powertrain control module (PCM)

When starting the engine, the PCM searches for a password from the BCM through the Class 2 serial data circuit. If the password is not recognized or not present, the PCM will disable the fuel injectors. Two modes of tamper detection are provided:
?€¢
No password received


The engine will start and stall quickly. SECURITY telltale will flash on the instrument panel cluster (IPC) and then stay ON steady.


?€¢
Incorrect or disable password received (More than 3 invalid passwords are received)


The engine is disabled for at least 10 minutes and the SECURITY telltale will illuminate solid on the IPC during the 10 minutes.

After the vehicle has passed theft detection, the PCM will continue normal operation
Ignition Switch
The mechanical key and lock cylinder is located on the steering column. The main electrical switching portion of the assembly is separate from the key and lock cylinder. The VTD portion of the ignition switch is the Passlock?"¢ cylinder.
The Passlock?"¢ lock cylinder is a locking cylinder that turns a magnet past a stationary hall effect sensor. When turned to crank, the hall effect sensor is latched which applies a fixed resistance to the Passlock?"¢ signal data circuit. The voltage measured by the BCM on the Passlock?"¢ signal data circuit is the Passlock?"¢ data value.
Body Control Module (BCM)
The BCM compares the Passlock?"¢ data value to a value that it has stored in memory. If the values match the BCM sends a password via the class 2 serial data line to the PCM.
Powertrain Control Module (PCM)
When the PCM receives the correct password, the PCM enables the fuel injection system, allowing the vehicle to operate correctly. The PCM may allow the car to start and quickly stall during a failed theft condition.
If the BCM does not receive a Passlock?"¢ data value, the BCM will enter a short tamper mode. During this mode, the VTD system will not allow the car to operate for 4 seconds.
If the Passlock?"¢ data value is incorrect, the VTD system will enter the long tamper mode. In the long tamper mode, the following actions will occur:
?€¢
The THEFT SYSTEM indicator will flash.


?€¢
The fuel injectors will be shut off for approximately 10 minutes.

Although the vehicle may start, the engine will quickly stall due to a fuel cut-off.
In the event of an open in the serial data communication between the BCM and the PCM or a failure in the Passlock?"¢ lock cylinder, the following actions occur:
?€¢
The VTD system will become fail-enabled if the car has already passed theft for that ignition cycle (i.e. the engine is running).


?€¢
The PCM or the BCM may set diagnostic trouble codes (DTCs).


?€¢
The THEFT SYSTEM indicator will light continuously.


?€¢
The PCM will become fail-enabled for future ignition cycles.

If a failure occurs when the ignition is off, while the VTD system is not fail-enabled, the PCM will never receive a valid password, and will not allow vehicle operation by disabling the fuel injectors. An this system can set 6 DTC'S
DTC B2947 Security System Sensor Power CKT Low DTC B2948 Security System Sensor Power CKT High DTC B2957 Security System Sensor Data Circuit Low DTC B2958 Security System Sensor Data Circuit High DTC B2960 Sec Sys Sensor Data Incorrect but Valid DTC B3031 Security System Controller in Learn Mode DTC B3033 Security System Indicates Tamper

May 21, 2015 | 2000 Chevrolet Cavalier

1 Answer

I just installed a new key switch in my 2006 trailblazer it is a napa part now when I start it it will only run for a few seconds and die ?


That is because of the vehicle theft deterrent system ! Do you have a security light lit on the instrument cluster ?
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


?€¢
The ignition switch


?€¢
The body control module (BCM)


?€¢
The security indicator on the instrument cluster


?€¢
The powertrain control module (PCM)

Ignition Lock Cylinder Case, Including the Passlock?"¢ Sensor
The ignition lock cylinder fits inside the ignition lock cylinder case and operates the ignition switch when turned by a key with the proper mechanical cut. When the ignition key is used to turn the ignition lock cylinder to crank, start, a magnet on the lock cylinder passes close to the Passlock?"¢ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlock?"¢ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle.
If a magnet from outside of the ignition lock cylinder case is used to attempt to steal the vehicle, the tamper hall effect sensor will be activated. This completes a circuit from the security sensor signal circuit through a tamper resistor to the security sensor low reference circuit bypassing the security resistor. If the ignition switch is forced to rotate without the correct key, or if the ignition lock cylinder is removed by force, the Passlock?"¢ sensor will be damaged and will not operate.

Feb 22, 2015 | 2006 Chevrolet Trailblazer

1 Answer

96 buick skylark starts & stalls, theft light on not flashing. Dissconnected map sensor still starts & stalls. No chip in key, changed fuel filter. whats goin on here?


This is pass lock antitheft system not pass key, pass key system is found on newer gm vehicles and has a transponder in the key. Pass lock system has a hall sensor on the lock cylinder.
System Operation
If the mechanical key is not used to start the vehicle, the PASSLOCK?"¢ system is designed to prevent vehicle operation. The mechanical key, in normal operation, will turn the PASSLOCK?"¢ lock cylinder. The PASSLOCK?"¢ lock cylinder will relay a Resistance Code (R-Code) to the instrument cluster. Within a preset time window started from an ignition switch input and will send a coded password to the powertrain control module (PCM). The instrument cluster will determine the validity of the R-Code. For the fuel injectors to operate normally, the powertrain control module (PCM) receives the correct code
Passlock System
Disabling the engine unless the PASSLOCK?"¢ lock cylinder is correctly engaged by a mechanical key. The PASSLOCK?"¢ system is designed to prevent vehicle theft. This system is similar in concept to the Passkey system. The PASSLOCK?"¢ eliminates the need for a key mounted resistor pellet. The components of this system are as follows:
?€¢
PASSLOCK?"¢ lock cylinder


?€¢
Ignition switch


?€¢
Instrument Cluster and Powertrain control module (PCM)


If the theft light is on there is a problem and a code set. You can try to do reset . Turn the key on , don't try an start the car . Let key on for 10 min. till the light goes out, if it goes out turn ignition off an wait a couple of min. then start the car

Dec 31, 2014 | 1996 Buick Skylark

2 Answers

My car starts but it turns off does anybody know whats the problem?


it could very well be the pass lock system. (anti theift system) if light on dash is on. go to tubesound.com, to disable system for good! tubesound.com/passlock system.

Jul 09, 2010 | 1997 Chevrolet Malibu

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