Theft system?

Tiny
ROMINE123
  • MEMBER
  • 1997 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 178 MILES
My theft system is on and my car will not restart.
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Wednesday, November 11th, 2009 AT 7:19 AM

42 Replies

Tiny
FACTORYJACK
  • EXPERT
Possibility hat the ignition cylinder wiring for the theft system has opened, and a valid key value is not being received. Proper repair is replacement of the cylinder with new keys, but there are other options available. Try this guide to reset it

https://www.2carpros.com/articles/how-to-reset-a-security-system

Please run down this guide and report back.
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Wednesday, November 11th, 2009 AT 10:10 PM
Tiny
DALEMACK
  • MEMBER
  • 1997 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I CANT START MY GIRLFRIENDS CAR SAYS SOMETHING ABOUT ANTI THEFT.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
BUZZSAW
  • MEMBER
Ign switch is bad
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
OZZYELCHULO
  • MEMBER
  • 1997 CADILLAC DEVILLE
It has a theft sustem problem, becuase the car was not moved for 6 months. When I did try to turn the car back on, itwould not star. It shows theft system problem. Can anione help whit this dilema!
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
OZZYELCHULO
  • MEMBER
U1064 : LOST OF COMUNICATION WITH DIM
U1016 : LOST OF CLASS 2 COMUNICATION WITH PCM
B2750 :CURRENT PASS KEY DATA COMUNICATION ERROR
B1983 :AIR MIX DOOR THO MOVEMENT FAULT
U1255 :CLASS 2 COMUNICATION MALFUNCTION (serial data line malfunction)
c1276 : DELIVERED TORQUE SIGNAL CIRCUIT MALFUNCTION

this codes come from my cadillac deville 97 99,000 miles. On the dash bord shows THEF SYSTEM PROBLEM. CAR MAY NOT RESTAR.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
ROBET E PARTRIDGE
  • MEMBER
  • 1997 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 87,000 MILES
On the information read out it has the following:

THEFT SYSTEM PROBLEM

CAR MAY NOT RESTART

SERVICE AIR BAG

Also lights do not work, if car starts it shuts right off, windows do not work, door locks do not operate, opening of trunk or gas door doesn't work.

This has happened before, had to be towed to a mechanic, he played with and seem to fix he thinks by repeatedly unlocking the car with the key.

It was good for about 2 or 3 months, then it happened again, I tried the thing and again was fixed.

Now its happened again and nothing seems to do any good.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi Robert,

Symptoms indicates a power supply interruption and it could possibly be the ignition switch.

Perform a test on the ignition switch to see if it is faulty.

IGNITION SWITCH
Turn ignition off. Disconnect Black 48-pin connector C202, located at base of steering column. Using DVOM, check for continuity between specified terminals with ignition switch in specified
position. See IGNITION SWITCH CONTINUITY TEST. See Fig. 3. If continuity does not exist as indicated, repair as necessary.

I am not able to add any diagrams and will send the file to your email but can't seem to find it.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
LOCKSMITH335
  • MEMBER
  • 1996 CADILLAC DEVILLE
Electrical problem
1996 Cadillac Deville V8 Wheel Drive Type unknown Automatic 127500 miles

can you tell me how to program my remotes to work for my car. I have 2 of them and both are marked no#1 on the back but nither work, I did replace batterys in them but no luck.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
BUZZSAW
  • MEMBER
You have to go to the dealer for this, 2 number 1 remotes wont work, has to have a 1 and 2 remote
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
JOHNRUK
  • MEMBER
  • 1996 CADILLAC DEVILLE
Electrical problem
1996 Cadillac Deville V8 Front Wheel Drive Automatic

My vehicle has " anti-theft car may not restart PRNDL" flashing on the instument panel. It starts everytime but this message prohibits a lot of the PCM functions. What could be the source of this?
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
FACTORYJACK
  • EXPERT
I would first check all DTC's by pressing off and warmer on the climate panel. Record and report all DTC's shown. Another check would be the resistance value of the ignition cylinder with the key installed. This would be done at the electrical connector at the base of the column, the two white wires that come out of an orange conduit are the ignition cylinder VATS wires. Check with an ohmmeter, while rotating the cylinder in all positions. It should display the same value as the key pellet, in all positions. Never should it read open circuit, if so you have a break.
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Saturday, August 29th, 2020 AT 2:21 PM (Merged)
Tiny
MRCOLTSMAN
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
My car will start but will only run for about 3 sec. Before it shuts off. Then it says anti theft problem
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
BUZZSAW
  • MEMBER
The Ignition switch is bad, you can replace the switch, but then it will have to be towed to caddy to do a theft relearn
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • 11,000 MILES
How to bypassVATS anti theft system
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
WRENCHER1
  • MEMBER
You can't bypass the entire system. It has to remain operational, however you can bypass the most common failure item.

The most common failure in these is the sensor in the ignition lock that reads the key pellet. That would mean replacing the ignition lock with a sensor included.

That sensor can be bypassed. You would need a digital ohmeter to measure the resistance of the pellet in the key. Now go to Radio Shack and buy a resister of the exact same value as the key pellet. Go to the base of the steering column and locate the two thin white wires that go up to the sensor. Cut the two wires and solder the resister between the two ends coming from the harness. This will permanently bypass the sensor but not the rest of the system.
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
BDZCADI
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 148,000 MILES
My car will not start.A display message appeared on the dash and it said."STARTING DISABLED DUE TO THEFT SYSTEM REMOVE IGNITION KEY".I read the manual and it told me to use a spare key but I didn't have one so I went to a locksmith and got a duplicate key. When I returned to the car and tried to use the new key. It still didn't work, but this time t said."STARTING DISABLED DUE TO THEFT SYSTEM REMOVE IGNITION KEY". Then it said."THEFT SYSTEM PROBLEM CAR MAY NOT RESTART". Is it possible to disable the theft system until I get it fixed. If so how?
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
FACTORYJACK
  • EXPERT
You can either buy a new lock cylinder, place a good key in it, and plug it in to the harness leaving it under the dash until it can be installed. Or if you know the resistance value of the key pellet, obtain some resistors of the same value and bridge the harness side of the connector simulating a good key. Then any key with the correct cut would start it.
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
MSCOLE@BAK.RR.COM
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • FWD
  • AUTOMATIC
  • 153,000 MILES
The alarm system on my 96 Cad Deville keeps going off. I do not have a remoteless key entry to turn it off with. I would like to either disconnect the alarm or disconnect the horn. How do I do it?
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Saturday, August 29th, 2020 AT 2:22 PM (Merged)
Tiny
SHANNONPAGE1
  • MEMBER
  • 1995 CADILLAC DEVILLE
1995 Cadillac Deville

how to I reset the security system? I am asking for my boyfriend who thinks he knows everything, lol please help me!

It was messed up after the mechanic who put in the new steering column
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Saturday, August 29th, 2020 AT 2:23 PM (Merged)
Tiny
FACTORYJACK
  • EXPERT
Has it not started since the used column was installed. There is no reset. More than likely, what is happening is the key that the column came with has a different resistance value than the original key. Since the module was not changed to match the key, it wont start. Check the resistance of the key from the old column, and the resistance of the key from the replacement column and see if they differ. If you can find out the vats code of the original key, you can have a key with that code, cut to match the replacement columns key pattern.
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Saturday, August 29th, 2020 AT 2:23 PM (Merged)

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