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2004 Ford Explorer won't start. Think we need to

2004 Ford Explorer won't start. Think we need to reset PATS somehow...

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It resets itself.

Principles of Operation
The PATS uses a specially encoded ignition key. Each encoded ignition key contains a permanently installed electronic device called a transponder. Each transponder contains a unique electronic identification code out of over 18 billion, billion combinations.
The passive anti-theft system (PATS), also known as SecuriLock ®, uses radio frequency identification technology to deter a drive-away theft. This system is known as SecuriLock® in North America, Safeguard® in the U.K., and PATS in Continental Europe. Passive means that it does not require any activity from the user.
The SecuriLock® System (PATS) is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. If equipped the remote start system must be removed before investigation of PATS-related, no-start issues.
Each encoded ignition key must be programmed into the vehicle's powertrain control (PCM) before it can be used to start the engine. There are special diagnostic repair procedures described in this section 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 the 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 Unlimited Key Mode Programming in Key Programming Switch State Control in this section.
The PATS transceiver module communicates with the encoded ignition key. The module is located behind the steering 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 concern, 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:

  • incorrectly encoded ignition key
  • damaged encoded ignition key
  • unprogrammed key
  • non-encoded key (key has no electronics)
  • damaged wiring
  • damaged transceiver
  • damaged PCM

Posted on Feb 22, 2009

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How can i reprogaming new key for ford explorer 2004

Posted on Mar 07, 2009

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Could the use of a diagnostic program such as a <a rel='nofollow' href="http://www.dgtech.com/product/vsi2534/vsi2534.php">j2534</a> help? Or would the car need to be of a more recent model?

Posted on Nov 21, 2012

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1 Answer

How do I reset anti theft on2000 ford explorer


The passive vehicle protection system will be activated and will disable the vehicle from starting if there is a:
  • damaged encoded key.
  • unprogrammed key.
  • non-encoded key (key has no electronics).
  • wiring concern.
  • transceiver concern.
  • PCM concern.
  • module communications network concern.
Reset ? IF your anti-theft system light is flashing when trying to start your vehicle , an the engine doesn't crank , turn , or nothing happens when you turn key , then your anti theft system is at fault ! An trying to reset will not work ,you need to have it checked DTC'S - diagnostic trouble codes ,then fixed ! I suggest you have it towed to the dealer or a ASE certified repair shop !
PATS uses the powertrain control module (PCM) to enable or disable the engine. The PATS module communicates with the PCM over the SCP communication network in order to enable engine operation. The PATS module and the PCM use sophisticated messages in order to prevent a theft. The PATS and the PCM share security data when first installed together, making them a matched pair. After this security data sharing, these modules will not function in other vehicles. The PCM shared security ID is remembered even if the battery is disconnected. The PATS module also stores the vehicle's key identification code, even if the battery is disconnected. There are special diagnostic repair procedures outlined in this workshop manual that may be carried out if either the PATS module or the PCM needs replacement.

Jan 20, 2016 | Ford Cars & Trucks

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How to reset anti theft on a 2005 ford five hundred


[PDF]Ford Passive Anti-Theft System Relearn ... - Cardone

my.cardone.com/techdocs/PT%2078-0004.pdf
Passive Anti-Theft Systems (PATS), also called Ford Securilock, is a vehicle security ... Module (PCM) on a PATS-equipped vehicle, a parameter reset or relearn ..

Ford Focus No Start Theft Light Blinking Easy Fix - YouTube

? 9:25
www.youtube.com/watch?v=pJBMgrW7MQU
Feb 12, 2014 - Uploaded by FordTechMakuloco I'm having that issue now with my 2005 Ford Explorer any other ... I am having alarm problems so I never ....

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2002 Ford Explorer. Drove to the store turned it off went in came out 2 minutes later and it won't start or even make a noise but it is getting power. What could it be?


Is the red light on the top center of the dash pad flashing fast when trying to start ? The engine doesn't turn over ?
Anti-theft system problem !
PATS uses a visual theft indicator. This 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. PATS also "blips" the theft indicator every two seconds at ignition OFF to act as a visual theft deterrent.
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.
The PATS is not compatible with aftermarket remote start systems, which allow the vehicle to be started from outside the vehicle. These systems may reduce the vehicle security level, and also may cause no-start issues. Remote start systems must be removed before investigation of PATS-related No Start issues.

Jun 16, 2015 | 2002 Ford Explorer

1 Answer

Wire in a Ford PATS Transceiver F8SB-15607-AC Ignition Lock Cylinder and Key FOB Explorer


i've found a few references on how to by pass this but if you follow this link to the ford explorer forum you will get better info and advice from fellow explorer owners/mechanics who know the vehicle from top to bottom
2002 ford PATS transceiver XLT won start

May 21, 2014 | 1999 Ford Explorer

1 Answer

2003 ford explorer PATs bypass


jump starting an engine will sometimes corrupt the program in the CPU . I would have the CPU reset using a code reader first so that the immobiliser was reset before I did anything else.

Jan 01, 2014 | 2004 Ford Explorer

1 Answer

I have a 2005 Explorer. We replaced the battery today and now it still will not start. It makes clicking noises with one key and the other key it make no sounds. Light is flashing on the anti theft and...


  • Hi, You should be able to stick the key into the ignition and turn the key all the way back and then all the way forward to reset the PATS system.
  • If not the Ford will have to reset this with their scanner.
  • In the mean time their is a harness that spans the drivers door and door frame. Also located in the drivers kick panel. Look for the green/purple (-) Splice a wire into either on and send it to a good chassis ground and this will disable the alarm.
  • I recommend just having it towed to Ford and have them work their voodoo on it with their scanner.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

Sep 16, 2011 | 2004 Ford Explorer

1 Answer

My ford galaxy will unlock using the key fob but the engine will not start. I assume it is an immobiliser problem. Is there a way to start the engine please.



  • The only way to try to start a car by bypassing the ignition is to pop the hood and jump start the starter (where the big red power feed wire is connected) to the positive terminal on the battery. If the vehicle is PATS security protected I don't think this will do any good because when a PATS key malfunctions the cars ECM shuts down and the car won't go anywhere until a functioning PATS key is inserted into the ignition.

Regards, Tony

Apr 30, 2011 | Ford Escort Cars & Trucks

1 Answer

Our anti theft activated when we tried to start the truck and we don't know how to deactivate it. the owners manual does not give goog directions


wait 10 min will reset ,if you have 2 pats keys ,make hure you have the right key for this truck or will set theft light

Aug 08, 2010 | 2004 Ford Explorer Sport Trac

1 Answer

HOW TO RESET OR DISARMED ALARM SYSTEM


The PATS system resets itself after 10 minutes.
Is the red light on the instrument flashing on and off every 10 seconds or so?

Jan 17, 2009 | 2000 Ford Expedition

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