Question about 1995 Cadillac DeVille

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Vehicle inoperable due to security system lockup, engine will not engage because alarm cannot be disabled

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Try this: open the driver's door (or whatever you have to do) to get the alarm to go off (activate) . Then, while it is honking the horn or doing whatever it does , walk around the car to the front passenger door and using your door key turn the lock cylinder to the lock and then unlock position . I believe this will disable the alarm system if it is a factory installed OEM alarm .

Posted on Sep 05, 2010

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Posted on Jan 02, 2017

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I removed my alarm system keystartremove n now want start 98 old cultass 3.1 engine


You can't do that an expect the vehicle to start , software programmed in the computer system . If the engine PCM doesn't see a pass word or coded message from the BCM or anti-theft module . IT will disable starting and or fuel injetor control .
Important: Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair.
All codes in the theft deterrent module must be cleared for a relearn.
The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is correctly engaged by a 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 engine. 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.

They do sell by pass modules you can find on the internet , in some cases it cheaper to have it fixed proper by a qualified repair shop . It just depends what the original problem was . You how ever just complicated matters by changing thing's .

Jan 08, 2017 | Oldsmobile Cutlass Cars & Trucks

1 Answer

My 97 Nissan Quest won't start after alarm went off


Sounds like the 'Anti-Theft' vehicle immobilizer system has been engaged. If you have handy access to your Vehicle Manual, check there first to vehicle specific hints and tricks.

Alarm systems are supposed to 're-arm' themselves after an incident triggering an alarm. This may take a few minutes during which time it ignores the key fob transmissions. If you can open the door but the engine won't start with the key or start button, try resetting the alarm with the key in on the "ON" or "ACC" position and using your fob button. If the alarm starts again, silence it with the fob button again.
OR
(Assuming your battery is in good condition and the gear selector is in PARK or NEUTRAL) If you have access to the hood release, disconnect the NEGATIVE battery terminal for 10 minutes to force a reset of all electrical functions upon reconnection. Make sure you don't touch the cable to any other part by slipping an old sock or mitt over it for safekeeping. (You might lose your radio and climate control presets but they can be reset easily once the main problem is bypassed.) Test the DOOR LOCK/UNLOCK button to verify that power has been temporarily disabled to the entire vehicle. After the wait, reconnect the power cable securely and try to start the vehicle.

Oct 10, 2016 | 1997 Nissan Quest

1 Answer

99 explorer alarm disables. Motor dies


Anti-theft system can keep vehicle from starting , Alarm is for vehicle content theft , open door without key alarm sounds (horns) ! PATS - passive anti theft system PATS enables and disables the engine from starting ,it will not cause the engine to die ! You have some other kind of problem ! If the vehicle engine doesn't turn over an red light on top of dash flashes fast ,then you have anti-theft system problem !
PATS differs from the perimeter anti-theft system in that PATS enables and disables the engine from starting. If equipped, the perimeter anti-theft system protects the perimeter of the vehicle (doors, hood and trunk) and sounds an alarm.

Aug 17, 2016 | Cars & Trucks

1 Answer

My 1998 Ford Ranger will not crank or start is it the factory alarm or anti theft alarm? How could I fix it myself


Is the security light flashing while trying to start the vehicle ?
The theft warning system provides the vehicle with protection from unauthorized entry into the passenger compartment and engine compartment (hood opening). It also protects against engine starting through ignition keylock cylinder tampering. If triggered, the system provides both audio and visual alarm signals and disables the starter circuit.
Sorry but you will have to take it to the dealer if it's the anti-theft system

Nov 21, 2015 | Ford Cars & Trucks

1 Answer

Hi,please i need your help.When i try to start my car,on the screen show me that engine disabled,please i need your help.


Your security system is restricting access to the starting capabilities of the vehicle.
Here is some helpful info about those security systems.
Security and Alarm System Operation Diagnosis on RangeRover 4 0 4 6 P38A

Sep 15, 2015 | 1995 Land Rover Range Rover

1 Answer

While driving the starting disabled warning came on and the car quit. after 3 tries it started and seems ok. what happened?


It just said starting disabled , nothing else ?
Starting Disabled (Due To Electronic Throttle Control)
Starting Disabled (Due To Theft System)
No other lights ? Service Vehicle Soon , check engine , security ?
Reduced Engine Power message ?

Aug 23, 2015 | 2008 Buick Lacrosse

1 Answer

How to disable security system on 2001 firebird


It is tied into the pass-key system that disables your car as part of vehicle security. You would have to by pass the pass key system which would make it vulnerable to theft as any duplicate key or broken ignition could start the car. In my estimation if it ain;t broke don't fix it or you might wind up with an inoperable car. There is more than mechanics involved ...codes and software programmed into the bcm will disable the starter, pump and injectors.

Jan 20, 2015 | 2001 Pontiac Firebird

1 Answer

Just bought a 2000 Isuzu Rodeo that didn't come with an owners manual or a clicker for the alarm system. How do I disable the alarm. Is there a switch in the vehicle that would disable the alarm? The...


There are fuses associated with the security system that you might try pulling out. The car may not start though if the circuit is not made.

You might want to consider buying a new remote. It can be programmed to your car and you can leave the security system intact.

Apr 15, 2011 | 2000 Isuzu Trooper

2 Answers

Wont start


you should contact a Attorney,this most likely wont go well ,it sounds as if it was improperly in stalled ,at the lest call your insurance.

Jun 28, 2010 | 1998 Cadillac DeVille

2 Answers

Electrical


Go inside the vehicle,dont put key in ignition, leave driver's door open, press the auto lock button on the driver's door, now close door while you are inside and watch on the dash the alarm enable itself, once it stops flashing open the door, this will set off the alarm, lights flashing horn blowing. Now take the key and put it in the drivers door and turn the key to stop the alarm. Now start you vehicle. If you want you can take the glove box apart to get to the vehicle security module to remove it. Dont unplug it unless the vehicle is running (must be running due to back up on computer) unplug the module and you will never have another problem with the security again and it does not effect your powerlocks.

Jul 09, 2008 | 1995 Jeep Cherokee

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