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You are watching: 1997 buick lesabre security light stays on


I have actually a "Security" irradiate on constantly together of this morning. Go anyone understand what sets this off? Thanks.
Yes. The starts and also runs great as always. It has just under 215,000 mile on it. I may shot disconnecting the battery.
Sounds choose the VATS (Vehicle Anti-Theft System).If the resistor pellet in your ign an essential is not detected by the VATS (wiring difficulty most likely), it will disable your starter and fuel systems. So, as soon as you turn the key, nothing happens- it won"t even shot to start.I had a 1992 LeSabre that would perform this in ~ times, yet not always. There are 3 things you can do right here to remedy the problem: 1. Change faulty VATS component(s).A dealership"s answer that will certainly work. Costs several hundreds at a GM dealership. 2. BypassA resistor (of exactly value) deserve to be installed in the wiring walking to your ign switch. However, this will defeat the VATS, make theft easier. 3. Temporary fixTurn the crucial to RUN, and also wait for the protection light to go out. This will certainly take around 3 minute (some suggest you wait 5 or 10 minutes). Turn the crucial to OFF, then begin the car. The light might come top top again, and stay on if driving to suggest the problem. This will at least permit you to operate the car. since it"s electronic, and you noticed the problem while operation the vehicle, it"s an extremely likely to have come up together an intermittent problem. You may never have actually a problem starting it... It could fail to start tomorrow. Keep the temporary settle in mind, or compose it down and stick the in your glovebox. If the system does start acting up, you won"t it is in stranded. If it i do not care a recurring hassle, go for the bypass or repair.
This is an excellent information. I like option 2, bypass by installation a resistor the a exactly value. I will certainly take a look in ~ the wiring diagrams later on today. Carry out you recognize which wire demands the resistor and what the ohms should be? Resistors are reasonably cheap in ~ Radio Shack. Have the right to the cable be accessed under the hood, close to the computer? Thanks.
I have actually a "Security" irradiate on constantly together of this morning. Does anyone know what set this off? Thanks.Does your automobile have a theft and tampering security system? ns don"t have actually that ~ above my restricted 98, but does it usage the same security light as the VATS mechanism uses upon starting?I have actually read part people saying a protection light ~ above Bonnevilles is sometimes led to by a difficulty with the tamper sensor top top the trunk. They suggest disconnecting that to view if the light quits.The VATS device turns top top the irradiate for about 5 seconds as the crucial is turned come ON. Climate the irradiate goes the end if the resistances room correct the it reads. If not the defense light blinks for 3 minutes and also the Theft Deterrent Module (TDM) resets for one more reading upon vital insert. If it it s okay the right analysis that time, the VATS sends signal come the computer and also injectors are turned on and also the start relay is activated.If the TDM does not acquire the right analysis it has two failure modes which I think both won"t allow the automobile to start. A 3rd mode for failure is where the TDM identify it may not be analysis the resistance correctly and also defaults, enabling normal car operation sans any kind of theft resistance via crucial copies there is no the right resistance.The irradiate coming on and also going off while steering may show the latter is happening. The resistance in the thin threads the the wires where the steering pillar tilts transforms while driving, e.g., and also the module find the resistance external the almost right 10% errors from once it was first started through that vital at the factory. I have read of a couple of world who reduced the wires if the automobile was to run to put the TDM right into that failure mode hoping come live happily ever before after. Ns don"t know if they eventually had problem or not.My automobile started giving occasional no reads and read okay on reinsert key immediately. As soon as in a while it would take 3 minutes. The light would certainly go on and also off when driving. Currently I acquire no protection light in ~ all. It"s been around two years. I see nothing in the factory service manual to show leaving the an essential ON and also waiting 3 minutes will allow the car to bypass the TDM requirements. In fact, after ~ the 3 minute expires, the TDM reads the key again. Negative reading = no start.The contact in the lock cylinder that brush the crucial resistor deserve to wear or gain dirty together with the resistors. Friend might shot cleaning those with alcohol and the resistor chips can be cleaned through a rubber pencil erase that"s just abrasive sufficient to clean it. Various other than that, if it yes, really is her VATS rather of tamper security, you"re due because that a resistor replacement to bypass the analysis up in the steering column.
if you realy desire to do the bypass go to youtube and kind in gm bypass over there is a real great video ~ above it ns did my 97 bonniville through the assist of that.
Imidazol97 knows much more about these systems than ns do, but I deserve to verify the "waiting because that the defense light to go out" point has operated for me on lot of vehicles with VATS. Smith1000 has not responded to mine question regarding whether the auto has a tamper/theft alarm on the body. I intentionally ordered my automobile without the in 1997 since I had actually heard human being with some problems speak to in top top radio mechanic"s fix shows. I hope the doesn"t have a tamper alarm problem and also instead is chasing a VATS problem. But the VATS problems are fairly general.I would suspect the 2nd time ~ waiting 3 minutes the TDM read the ideal resistance native the key through the breaking strands of wire in the steering column. The service manual doesn"t say the waiting one 3-minute bike would enable the crucial to be used. That negates the entirety purpose of the VATS i beg your pardon is to hold-up the theft by inquiry 3-minute waits between testing each of the different 15 resistances. Most thieves don"t desire to wait roughly an average of 21 minute guessing they"d hit the ideal one. There room resistance box that have actually the 15 resistances and also you just switch in between them until the discover the best one, all through a correct key copy in the ignition to revolve the cylinder or through the column damaged to relocate the rod to the ignition move with transforming the lock cylinder at the top.
The vehicle doesn"t have actually a tamper/theft alarm on the body, for this reason it need to be the VATS problem. That is still starting and to run fine. Ns may shot cleaning the an essential with one eraser and the ignition switch. Sounds prefer it is due for a resistor replacement. I"ll check out the girlfriend Tube video clip as well.
I cleaned the key and there was no change. Make the efforts the other key and the irradiate is quiet on, nevertheless of the key. Measure up the resistance and also it shows up to be in the variety of 500-600 ohms. I perform not have a working digital volt meter at the moment, but used one analog. Measure up the other key and both secrets measure the same, so the keys examine out okay.The light come on at begin up, never blinks and also stays top top constantly.
Evidently friend security system is stuck in what GM refers to as “fail-enable mode”. This happens once a an essential recognition circuit fail occurs v the proper key in the lock and also usually as result of frayed wires leading from the key recognition circuit, or short-term loss that battery power while driving. Essentially, the theft-deterrent system goes ‘off-line’ and also the engine will start and also run with any vital that transforms the lock. The defense light will continue to be ON everytime you begin your engine, after either occasion mentioned take away place. If you perform not exactly the initial problem, the same problem may return. Your defense system can be reprogrammed using a Tech-II scan tool, or you can shot the reprogram procedure below. here is a 30-minute programming procedure the does not require a scan tool. 1.Turn the ignition switch to START, then relax it come the ON place (the engine will not start). 2. The “Security” light must be ON. After 10 minutes, it have to turn OFF. 3..Turn the ignition move OFF and after five seconds, repeat actions 1 and also 2. as soon as this procedure has actually been complied with three times, revolve the ignition move OFF. The regulate units will exchange the correct regulates during the next start-up attempt. If the programming is no completed correctly, there will be no theft defense or the device will lock in antitheft mode and the engine will certainly not start. Shot the programming procedure again. Note this procedure will not reprogram the an essential recognition, just the information transmitted on the class 2 data link.
Could it it is in left as is in "fail-enable mode" indefinitely? ns watched the girlfriend Tube video clip and that is an extremely good. The VATs bypass would be a rapid fix otherwise. I am no concerned about having a security device on the automobile at this point, however would rather prevent a no begin situation.

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If you disconnect the battery, or the battery should lose power, the system my default to energetic mode as soon as you restore full battery power, i beg your pardon means; the automobile will not begin unless the vital resistance is recognized and the communication between the TDM/BCM is complete. As long as you maintain 12v+ voltage, girlfriend can continue to drive it with the irradiate ON.