Question about 2003 Pontiac Sunfire

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Theft sensor need to know the location of the theft sensor

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Theft sensor is Part of the Ignition Lock cylinder. On your Sunfire.

If you have problem with the theft system on your car.
First check the proper funtionallity of the Ignition lock cylinder.

if you Can explain me a little bit of your problem I can help you.

Thank you for use fixya...

Posted on Aug 23, 2008

  • michael r cherry
    michael r cherry Feb 07, 2013

    i have a 98 sunfire, i purchased at a auction, it had no key, so i took the title to the buick dealer ship, an got a key made, i tried to start it, an it would only turn over an not fire, so i thought fuel pump,, so i replaced it, hooked up the battery, an turn the key off an on, a few times, then started the engine ,, great it runs,, i drove it all around the lot i had the car at, parked it so i could go get the tags, i went back on sunday to check on the car, an again, put the key in an it ran fine, so monday went to get tags monday morning, got them an fired it up drove all over town that day then drove it home, parked it in my drive way,, then, my son came over an i went to show him it was running, but ,,,, forgot i took the key out an turned the switch, an it only turned over the engine an hasn't started again, since that was 5 mos ago, i have looked on the internet to see if there is a bypass, but i'm told there isn't any bypass, i did find a guys post about reserching the problem with this system, an how to cut three wires an put them together an the engine will start, but now i can't find the post, i thought i saved it, but if you know a way it can be fixed that would be great, if i don't get this car running soon the apt manager says i have to get rid of the car, so i'm out the 1500.00 i paid for it plus the key an fuel pump, thanks for any of your help, 98 sunfire 2.2 auto trans,


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2001 saturn lost keys to it. Got it to crank cut right back off secrity lights on bought a brain box for it and got 2keys with it. Still want crank I need to know what to do t could the box be bad ..

No ,the box is probably not bad , but you need to have it programmed . The dealer is the only one that can do that ? The keys don't matter .
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 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.
Sorry but you can't just replace parts , you need to know how the system works . You need to take this to a ASE certified repair facility that knows how it works .

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1 Answer

Where is the anti-theft located on a1996 nissan pathfinder

No one should discuss anti theft systems on an open forum. If you are not a thief Take proof of ownership and an identity document to your Nissan dealer and deal to the problem there.

Jun 26, 2014 | 1991 Nissan Pathfinder

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My 1999 Pontiac Grand Prix GTP is not starting, the fuel pomp is working and you can hear it go on when you insert the key, my key does no have the chip in it, so im guessing is the anti theft, i replaced...

If you replaced the crank sensor and it will not start then your car needs a CASE learn. Once the crank sensor is removed and a new one is installed, without a lot of luck it is highly likely that the sensor will be out of range to properly detect your crank position and send the info to the PCM so proper ignition timing can be calculated and executed from any given piston position left at vehicle shutoff. A CASE learn is a procedure that will calibrate the new sensor to correlate with crank position. Without it, your car will not run. It can be done with most TechII compliant scan tools with the capability. You may be able to rent or buy a used one to get you up and running again, it's a simple procedure it should take only about ten minutes.

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1 Answer

2001 mustang 3.8 no spark. an no power to crank sensor, is there a fuse for the crank sersor?

No there is not a fuse to the crank sensor, and if you were checking for voltage at the crank sensor ,you should see more than 1 volt but less than two volts at the crank sensor positive circuit which is the Dark blue wire, the crank sensor is a hall effect type sensor which generates its own voltage, It would be very helpful to know how this no start problem came about ! was any work recently been perform on your car ? it is also possible that you have a theft type problem with your car, which if for any reason your car"s theft system thinks its possibly being stolen, (example does not like the key or the electronic chip in the key is defective) may put it into to a theft lock down, ford uses different methods to keep the car from been stolen,some are disable the starter (example no crank) another is to disable to fuel pump circuit, or disable the spark,the easiest way to make sure this is not whats the problem, is to monitor your theft light, (located either in the gauge cluster or on top of the dash,) you have a red light or a red key that flashes or possible or just says theft, if the system is working correct when you first turn the key to the run position the light ,key or the theft light will flash three times and then go out and say out if it continues to flash you have a theft problem.there are many other possible reasons why you could have no spark such as broken wires ,wires rubbed bare and grounding out to engine ect, I could help you further but would need more information to help you further ,hopefully this will get you headed in the right direction

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2 Answers

I need to know which fuse is connected to the security alarm

the security system is not directly fused, so there is no fuse to remove, also removing power to the system in any way will result in a no start condition.

Feb 12, 2010 | Mitsubishi Montero Sport Cars & Trucks

1 Answer

Theft deterent sensor location. Still trouble-shooting voltage loss to the fuel pump. Origination of problem serpitine belt tensioner failure.

theft -deterrent module need to notify a dealer unless ur trained in the system messing around it well cause more prolems such as totally shutting down ur car so that u will need it towed to dealer for reset plus --security unit doesnt affect fuel voltage --- wiring harness fuel pump connection possible corroded or shorting to cause voltage loss

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1 Answer

I would like to know where the fuse for anti theft is location

Hi there,

Below is a link that will take you to a page that gives detailed information regarding your Rodeo's anti-theft system. There, you should find anything you need to know. Hope this helps and have a great night!


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