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Anti theft activated

Tiny
BIGLOU6088
  • MEMBER
  • 1998 FORD EXPLORER
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130 MILES
I have no idea what else to try after trying everything. Ford dealer wants to charge me an arm and a leg so I want to fix myself if possible.
Thursday, January 30th, 2020 AT 8:19 AM

11 Replies

Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
I would be happy to help! First we will need to retrieve the trouble codes from the passive anti theft system module (pats) and the power-train control module (PCM). This will direct us to the correct pinpoint test procedures to use. I've attached a picture of the system components to give you an idea of what's involved.
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Thursday, January 30th, 2020 AT 10:06 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,393 POSTS
It sounds like the system may need a hard reboot which is done by holding the negative battery cable end to the positive terminal for about 1 minute this will discharge the capacitors in the system and let it reboot. this guide can help us:

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

Please run down this guide and report back.
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Thursday, January 30th, 2020 AT 11:59 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
Is it the factory alarm system, or an aftermarket add on alarm system?
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Thursday, January 30th, 2020 AT 2:39 PM
Tiny
BIGLOU6088
  • MEMBER
  • 6 POSTS
It is a factory alarm system.
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Friday, January 31st, 2020 AT 8:21 AM
Tiny
BIGLOU6088
  • MEMBER
  • 6 POSTS
So I'm going to try the hard reboot. So I just disconnect the the negative and hold it to the positive?
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Friday, January 31st, 2020 AT 8:24 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
Yes. Let us know what your results are.
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Saturday, February 1st, 2020 AT 9:27 AM
Tiny
BIGLOU6088
  • MEMBER
  • 6 POSTS
Putting the negative to the positive did not work unfortunately.
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Monday, February 3rd, 2020 AT 5:47 AM
Tiny
BIGLOU6088
  • MEMBER
  • 6 POSTS
If I change the ECU would that work?
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Monday, February 3rd, 2020 AT 7:27 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
You haven't given us any trouble code information, that is the first step in diagnosing this type of issue. We don't want you to spend money if you don't have to my friend!
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Monday, February 3rd, 2020 AT 7:33 AM
Tiny
BIGLOU6088
  • MEMBER
  • 6 POSTS
I have no computer to get the codes. I would have to ask a friend to see if they have one and get back to y'all.
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Monday, February 3rd, 2020 AT 7:36 AM
Tiny
BMDOUBLE
  • MECHANIC
  • 1,139 POSTS
Okay, awesome! Let us know.
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Monday, February 3rd, 2020 AT 8:18 AM

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