Fix Chrysler anti theft system

Chrysler anti-theft systems have actually gone with a couple of iterations. Starting in 1989, Chrysler started installing them on the C, G, and also J human body styles. The engine controllers in the era were referred to as SMEC (single module engine controller). The SMEC communicated with the body control module (BCM). In anti-theft fitted vehicles, the system would sense once you removed the ignition key. If girlfriend then offered the far keyless entry (RKE) come lock the doors, the security light would flash because that 7-secs and then go out. The system was climate armed. If the doors were opened without disarming, the horn would certainly honk, parking lights would certainly flash, and also the SMEC would turn off the fuel injectors to avoid start-up.

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While armed, the protection alarm module (SAM) monitors the hood, trunk, door, and ignition switches via a data bus indigenous the BCM. Few of the switches were difficult wired come the SAM, others to the BCM. The SAM is programmed come look because that a door unlock first. If it sees a hook, trunk, or ignition signal without first seeing a door unlock, that would set off the alarm. The horn is programmed come time the end in 3-mins to avoid battery drain and avoid messing with your neighbors. The park and also tail lights time the end in 15-mins. Disconnecting the battery without an initial disarming will also collection off the alert system.


If you have actually a dead battery and you’ve fee it or changed it, opportunities are an excellent that the alarm is still in disable mode and you won’t acquire fuel. To reset the system, nearby the door and hood. Then lock and also unlock the doors with the keyless entry fob or the really key.


Chrysler update the device in 1993 ~ above the LH vehicles by incorporating the SAM module right into the BCM. And then got rid of the security light and also instead mounted an caused the center of the dash. The LED flashes because that 15-seconds and also then every 30-seconds come alert would-be burglars the the mechanism was armed.

Now here’s where you need to pay attention. Both the SBEC and the BCM the this generation room programmed come look in ~ each other to watch if the alert programming is installed. This problem if you have to replace either component. Here’s the scenario; girlfriend grab an SBEC from the junkyard indigenous the exact automobile as yours, but that auto DIDN’T have an alarm. Currently you try to download it in her vehicle. The SBEC checks in through the BCM the WAS programmed because that alarm. Now you’ve acquired a problem. The offered SBEC will not permit the vehicle to start.


Starting in 1995, Chrysler added another module referred to as the SKIM (security an essential immobilizer). It functions in conjunction with the alarm system. This device uses a transponder vital and a transmitter/receiver module in the steering column. When you insert the key, the transmitter sends out out a radio frequency. The radio signal is received by the antenna in the key and powers up the chip, which then transmits its unique I.D. Code back to the transmitter. If the I.D. Password isn’t correct, the automobile will start and also then stall and also the protection light will certainly flash 6 times. If girlfriend repeat the starting procedure through the dorn key, the mechanism will disengage the starter on the 7th attempt. The only means to unlock the device at that suggest is to use the ideal key, or have the device reprogrammed with a manufacturing facility scan device or by doing a customer discover procedure.


If you get a new an essential from the dealer, here’s exactly how to regimen the mechanism yourself.

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You’ll need TWO working keys

1) Insert one good key in the ignition switch and also turn it come ON. Leave in ON for 3-secs., and then revolve it to OFF. 2) Insert the second great key and also turn to ON. You must insert both secrets withing 15-secs. After ~ 10-secs. In the on position, the defense light will flash and the chime will certainly ring one time. 3) within 50-secs, remove the second key and also install the brand-new blank key. Turn to ON. 4) Wait till you hear another chime and also watch because that the protection light to stop flashing. As soon as the light glows steady for 3-secs, you can remove the brand-new key. The an essential and the mechanism are currently programmed.

The system allows up come 5 keys to it is in programmed come one vehicle. If you replace the BCM, friend must allow the alarm. ~ above 1996-2000 minivans, follow this procedure: open up the hood and also then bike the vital in the liftgate. ~ above 1994-1997 LH vehicles, the mechanism is me enabling. On all other, you require a factory scan tool