Cannot reset PATS System

2005 MERCURY MOUNTAINEER
100,000 MILES • 4.0L • V6 • AUTOMATIC
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EARL UMPHRIES
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  • 2 POSTS
Fuel pump and starter shut down. can't reset pats system. all relays and fuses good will start and run if power starter and fuel pump.
Jan 16, 2022 at 3:05 AM
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SQM
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  • 6,383 POSTS
Hello,

Try this method to see if that helps to reset the passive anti-theft system (PATS):
Hold the panic button on the key fob for 2 seconds.
Close all the doors and while using the key lock and use the key to unlock the lock the driver's door.
If that doesn't work remove the negative battery cable for 15 seconds and reconnect.

https://www.2carpros.com/articles/how-to-reset-a-security-system

It that does not work you will need a scan tool to reset the PATS.

I have attached the instructions below.

Please let me know if you have any questions.
Thank you
Jan 16, 2022 at 12:12 PM
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EARL UMPHRIES
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  • 2 POSTS
Thank you! I've tried everything but the scan tool reset. Will update results as they unfold.
Jan 16, 2022 at 12:34 PM
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SQM
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  • 6,383 POSTS
You are welcome. Keep me posted.
Jan 16, 2022 at 12:57 PM