Question about 2004 Ford Explorer
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Posted on Jan 02, 2017
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:
Posted on Feb 22, 2009
Your ignition requires a radio signal from a chip inside your key to start the car . Your car wont start because you are using the wrong key, your ignition is no longer able to read the key (ignition replacement), or your key is malfunctioning.
Posted on Mar 27, 2009
Try re-setting the computer...Disconnect the negative terminal of the battery and leave off for 5-10 minutes. This will allow the computer to reset. The charger may have interupted the signal or something.
Posted on Mar 11, 2010
Can I have more info.
1. is there any pressure in the fuel tank when you remove the cap?
2. have you tried leaving the battery off for 24hrs then reconnect?
3. has any other work been done recently such as starter motor or altenator etc, for the battery to drain it could be a parasitic electrical drain this can happen if a relay is sticking, a module is not turning off, or a shorted diode in the alternator itself is faulty.
get back to me.
Posted on Dec 29, 2010
You are right.Its the key code problem.
As per the manual it says:--- sometimes when the battery is disconnected or has to be recharged - this happens. The computer forgets the key code and the key has to be re-coded. The ford service center/dealer charge $35 to $50 for recoding the key and this makes the car to function properly and it starts .
Also check the code in your car:--- under the plastic-passenger side under the very back window-next to rear passenger door jam-Looks like a black box. The Original Code is on a tag on that box.But if its not there then dealer is other option/.It takes few minutes to get recoded.----------------This should help.Thanks.Helpmech.
Posted on Dec 30, 2010
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