redwil

Hello Everyone.
I have a 2004 Crown Vic Lx.
It has sat all winter. When i went to start her , she went into the PATS mode. The theft light is blinking in a fast mode
I replaced the battery. I check the transceiver for loose or broken wires.
I don't know what happened. I could sure use some advice instead of going to the dealer.

Bert

Try unhooking the battery for 30 sec. and see if that helps. Also, try another key.

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Bert

goldie1

not sure with the usa fords but our cars here in oz sometimes lost pats what we could do sometimes to fix it was turn the key to ignition on postion for 30 minutes and this seem to work.

Ian

redwil

Thank you all that is trying to help me. I am at my wit's end with this problem.
I also am receiving a message when i try to scan the pcm ....LINK ERROR.
What is this ?

glenn-ho

I have the same problem. Pats light and check engine light flash. I also cannot get a Ford NGS scanner to connect. I swaped the pcm and I know that the pats light would flash since I don't have a key for that PCM but why would the check enigine light flash also. It is obvious it is not a PCM problem with mine.

andyfanshawe

If there is a link error, all feeds and earths to the PCM must be checked.
Sometimes sitting all winter makes fuses/connections oxidise and lose their continuity. Even battery connections can create a high resistance.
I usually pull/check all fuses first and clean the battery terminals.
keep it simple first.

Good luck.

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lowcamaro

redwil

I cleaned and check all the fuses. I replaced the negitive Batt cable to engine. Cleaned all I could clean, I even installed a new battery, and a new transceiver....
Is there any other grounds to check etc....

tbird100636

If you can't communicate with the PCM with the scan tool there is a communication issue. You need to diagnose this first.

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Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!
1967 Mustang Convertible- Blue- 289 V8- helping a friend re-assemble this classic

redwil

Is there any idea why I keep getting the error message on the scan tool ???
It comes on reads KWP2000 them ISO , then link error

glenn-ho

if your problem is the same as mine the wire I e-mailed you about is the 12v for the pats system and communication from the PCM. I could not get communication/connection to my ford NGS scanner also.