Security Module location

Your vehicle doesn't have GEM / CTM . Your vehicle has a VSM - vehicle security module.

CAUTION: Prior to removal of the vehicle security module, it is necessary to upload module configuration information to a diagnostic tool. This information needs to be downloaded into the new module once installed. Refer to Module Configuration in this section.
It is located behind the

1. right rear quarter trim panel.

SECTION 418-00: Module Communications Network 2003 Explorer/Mountaineer Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 06/18/2002 Module Controlled Functions The multifunction electronic control modules consist of the following:

• vehicle security module
• driver seat module (DSM)

Principles of Operation
The vehicle security module controls the remote keyless entry (RKE) system and power lock system. For additional information, refer to Section 501-14 .
The driver seat module (DSM) allows automatic positioning of the memory driver seat, both outside memory mirrors and the memory pedals to three programmable positions. For additional information, refer to Section 501-10 .

Free wiring diagrams here
http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. Under system click on body & accessories ,then under subsystem click on body controls . Click the search button then the blue link .

Having the vehicle checked for codes should have been the first thing done . Security light on ,a code is stored in the control module that controls the anti-theft system ! This is if you want it fixed right !
Important: If the wrong ignition key is used in an attempt to start the vehicle, a Data Trouble Code (DTC) will be set and the Body Control Module (BCM) will not send a fuel enable or starter enable message to the Powertrain Control Module (PCM) for three minutes even if the correct ignition is used.
The Pass-Key II® Theft Deterrent system prevents vehicle theft by disabling the starter motor and fuel system. If the Body Control Module (BCM) dose not identify the use of the correct ignition key to start the vehicle, the (BCM) will communicate a message to the Powertrain Control Module (PCM) which will disable the crank relay and fuel delivery to the engine.
When the (BCM) identifies the use of the correct ignition key (resistor pellet) to start the vehicle, the (BCM) will send a fuel enable and starter enable message to the (PCM) which will allow the vehicle to start.

DTC B2957 Security System Sensor Data Circuit Low
DTC B2958 Security System Sensor Data Circuit High
DTC B2960 Sec Sys Sensor Data Incorrect but Valid
DTC B3031 Security System Controller in Learn Mode
DTC B3094 No Response from ECM/PCM Received

or you can do a by pass that may or may not work ! You could measure the resistance of the pellet on the side of the key , then go to radio shack a by a resistor of the same value ! Then find the wires under the dash that come from the ignition switch ! Solder the resistor into the harness side wires , not going back to ignition switch . The wires break or contacts inside ignition switch do . You could check resistance with ohm meter . Put key into the ignition switch , find those wires i said about before . Check resistance at the wires under dash , is it the same resistance as pellet ?

This may be related to the antitheft security system. The system is known for turning off the starter and/or injectors when it fails. When it's the security locked out starter, you won't even hear a click when you turn the key. Is there a light on the dash that says SECURITY or a picture of a car with a lock through it? This is a common problem worth looking into. http://www.diy-gm-security.com/

Carbon brushes are worn in the starting motor, if you know a bit about engines, it's easy enough fix as you buy a replacement brush kit from your main dealer. Usually I just cut the old brushes out & solder new ones in for a couple of bucks.

Chances are your Imobilizer is keeping your car from starting, try using a different key. Is the car cranking and then shutting off a second later? Any lights flashing on the dash? Highly unlikely that a brake fluid leak would prevent your car from starting. The only way thAt would be possible is if the fluid leaked onto a module and ate away at your board.

Hi, Seems that the SKIM (Security Key Immobilizer Module). Try locking and unlocking drivers door, sounds like security system was triggered. If unlocking and locking door does nothing locate (ECU) fuse, (Main) fuse, and (IOD) fuse. If so pull fuses turn key to on position do not start, wait 3 to 5 minutes install fuses and try starting. Please also check battery connections for clean and secure.

Does it not start or not crank ?
Do you see a security light on the dash ?

Make sure battery has a full charge and battery connections all good. I don't think your security system is the problem? At the starter motor two voltage circuits, one is fuse protected and is hot all the time. The other circuit goes hot with key in the start position and relay is energized. Any testing at relay or starter motor, make sure tranny is in park or neutral and parking brake is set.

i have a dodge nitro that has a factory security, but you dont hear the engine crank.. try pressing lock twice on the key remote then unlock twice then turn the key.

the security system resets itself after about 15 minutes. If it was the security system, the car would not crank over. Why do you think it's the security system?
do you have gas in tank?

Is it a Ford security system, with the flashing light on the dash?


Principles of Operation
The PATS uses a specially encoded ignition key, this key is not compatible with previous vehicles or any current model year vehicles. Each specially encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique encrypted identification code out of over 18 billion, billion combinations.
Each encoded ignition key must be programmed into the vehicle's powertrain control module (PCM) before it can be used to start the engine. There are special diagnostic repair procedures outlined in this manual that must be carried out if a new encoded ignition key is necessary.
This system contains a new feature named Unlimited Key Mode. This feature allows a customer to program more than eight keys to their vehicle if they request it. Each vehicle in Unlimited Key Mode is set up with a special Unlimited Transponder Security Key. This allows all the customer vehicles to share the same keys, but no other keys from outside can be used to operate the vehicles. For an individual customer, any randomly selected Security Key is acceptable. Refer to Key Programming—Unlimited Key Mode in this section.
The PATS transceiver module communicates with the encoded ignition key. The module is located behind the steering wheel column shroud and contains an antenna connected to a small electronics module. During each vehicle start sequence, the transceiver module reads the encoded ignition key identification code and sends data to the PCM.
The control functions are contained in the PCM. This module carries out all of the PATS functions, such as receiving the identification code from the encoded ignition key and controlling the engine enable. The PCM initiates the key interrogation sequence when the vehicle ignition switch is turned to RUN or START.
All elements of the PATS must be functional before the engine is allowed to start. If any of the components are not working correctly, the vehicle will not start.
The PATS uses a visual theft indicator. The indicator will prove out for three seconds when the ignition switch is turned to RUN or START under normal operation. If there is a PATS problem, this indicator will either flash rapidly or glow steadily when the ignition switch is turned to RUN or START. The PATS system also flashes the theft indicator every two seconds at ignition OFF to act as a visual deterrent.
The PATS will be activated and will disable the vehicle from starting if there is a:

• improper encoded ignition key (example — Taurus/Sable key).
• damaged encoded ignition key.
• unprogrammed key.
• non-encoded key (key has no electronics).
• damaged wiring.
• damaged transceiver.