Ford Repair Questions? Ask a Mechanic for Answers ASAP
you wrote,. Even with the factory equipment at the dealer, we cannot disable the system. that may be true,but I can bypass the system,it's just a
matter of identifying the relays that control the starter solenoid.As i said
Iam an electrician.Iam simply trying to save time by contacting
someone who has access to component location.I totally
understand if you are strickly in the mechanical side.Ford must have
people that can diagnose electrical problems.They would know
exactly what Iam talking about.I have a simlified diagram
of the anti-theft system in my Haynes book,showing the relay,but
I'm assuming you have more detailed infor. thanks,anyway
thanks for responding,I did take my key to a local
key shop, that when he put my key into his programmer,
it did show a code.I don't know if that is proof or not my key is good?
Yes I understand that the computer controls injection,timing and
a lot more.So are you saying that the computer receives a coded
signal from the Key decoder chip or would it just need a ground to
the correct input?On my simplified diagram it does not show a connection
to the computer from that module.Why would they bother to show how the
starter relay is activated by the decoder and not the computer?I can show you the diagram if necessary.
The check engine light and all instrument lights come on,
as well as the alarm light blinking rapidly,which means a anti- theft
This dia.,at the top shows Alarm/fuel system connection
going to fuel pump relay.No fuel is the same as no injectors.
If you have a more detailed diagram that shows an input
from that transceiver to the computer.I would like to see it.
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 driveaway 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 electronic 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 following will activate the PATS and will disable the vehicle from starting:
I completely understand how the system works,the only
thing I need is the schematic or at the least,a wiring diagram.
It doesn't have to show everything,just the wires going from
the tx/rx module to the PCM.It's pretty easy to hook up a scope
to the T/R output and look for a pulse train.In both directions for that matter.
I really don't need theory of operation.I need simple,practical,
wiring,preferably with color coded wiring.
T/R to PCM maybe 2-3 wires.I can't be more specific than that.
1. wires.. possibly 2
2. diagram showing transceiver (tx./rx or just t/r)
3. diagram showing PCM
4. diagram showing both
5. diagram showing both connected by 2 wires
see attached drawing
If you don't understand anything,refer to the number in your reply
Thanks for responding,the problem is,that seems like a partial solution.
If the diagram in my Haynes manual is correct,the start relay and the fuel pump
relay need to be bypassed,or are you saying that flashing the computer will
also solve that problem?
O.K. if I contact a race shop here in miami,(any suggestions)and ask them to
shut down the PATS system they will know what to do?
Also you mentioned a chip to do that for $200. In case a shop won't do it
where can I find it? thanks,Ron