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Old 03-02-2011, 18:09   #1 (permalink)
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PATS System Crown Vic no Start

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.
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Old 03-02-2011, 19:10   #2 (permalink)
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Re: PATS System Crown Vic no Start

Try unhooking the battery for 30 sec. and see if that helps. Also, try another key.
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Old 03-02-2011, 22:11   #3 (permalink)
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Re: PATS System Crown Vic no Start

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.

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Old 03-06-2011, 16:44   #4 (permalink)
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Re: PATS System Crown Vic no Start

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 ?
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Old 04-16-2011, 08:28   #5 (permalink)
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Re: PATS System Crown Vic no Start

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.
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Old 04-16-2011, 11:07   #6 (permalink)
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Re: PATS System Crown Vic no Start

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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Old 04-17-2011, 11:24   #7 (permalink)
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Re: PATS System Crown Vic no Start

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....
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Old 04-17-2011, 12:56   #8 (permalink)
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Exclamation Re: PATS System Crown Vic no Start

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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Old 04-18-2011, 15:08   #9 (permalink)
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Re: PATS System Crown Vic no Start

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
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Old 04-25-2011, 17:04   #10 (permalink)
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Re: PATS System Crown Vic no Start

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.
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