2006 Ford Ranger Anti Theft Issue
#1
06-10-2020
Join Date: Jun 2020
Location: Fairborn
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2006 Ford Ranger Anti Theft Issue
New to the forum. I have a 2006 Ford Ranger 4.0 4x4 and replaced the starter over the weekend. No issue. After about an hour of driving the anti-theft light flashed and killed the engine. I was able to restart and keep going until is flashed again and did the same thing. The truck starts and idles normally but driving causes the anti-theft to activate. Any advice is greatly appreciated.
#2
06-10-2020
Welcome to the forum
In 1999 Ford Rangers started to get PATS(passive anti-theft system), this is not an alarm system, no lights or horn, just prevents startup if the transponder key's number is not in the computer's memory when key is FIRST TURNED ON
After engine is running PATS is OFF, gone, done, no longer in use
PATS doesn't monitor anything and is only active when key is first turned to ON, then it either allows engine to start or doesn't
In 2006 Ranger the PATS module is IN the HEC(instrument cluster)
So for PATS to stall a running engine the instruments cluster would have to lose power, so PATS "thinks" its a restart of the engine, i.e. time to do its job
Google: Ford HEC
HEC is the instrument cluster used in 2004 and up Rangers, that has the PATS built in, you can run tests on it
As said PATS in no way monitors anything after startup, it doesn't "look at the key" again, its off-line until key is turned off and then turned back on again
So I am thinking some kind of power loss is occurring in the HEC
What about the ignition switch, how does rotating the key cylinder feel?
In 1999 Ford Rangers started to get PATS(passive anti-theft system), this is not an alarm system, no lights or horn, just prevents startup if the transponder key's number is not in the computer's memory when key is FIRST TURNED ON
After engine is running PATS is OFF, gone, done, no longer in use
PATS doesn't monitor anything and is only active when key is first turned to ON, then it either allows engine to start or doesn't
In 2006 Ranger the PATS module is IN the HEC(instrument cluster)
So for PATS to stall a running engine the instruments cluster would have to lose power, so PATS "thinks" its a restart of the engine, i.e. time to do its job
Google: Ford HEC
HEC is the instrument cluster used in 2004 and up Rangers, that has the PATS built in, you can run tests on it
As said PATS in no way monitors anything after startup, it doesn't "look at the key" again, its off-line until key is turned off and then turned back on again
So I am thinking some kind of power loss is occurring in the HEC
What about the ignition switch, how does rotating the key cylinder feel?
#3
06-11-2020
Join Date: Jun 2020
Location: Fairborn
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Welcome to the forum
In 1999 Ford Rangers started to get PATS(passive anti-theft system), this is not an alarm system, no lights or horn, just prevents startup if the transponder key's number is not in the computer's memory when key is FIRST TURNED ON
After engine is running PATS is OFF, gone, done, no longer in use
PATS doesn't monitor anything and is only active when key is first turned to ON, then it either allows engine to start or doesn't
In 2006 Ranger the PATS module is IN the HEC(instrument cluster)
So for PATS to stall a running engine the instruments cluster would have to lose power, so PATS "thinks" its a restart of the engine, i.e. time to do its job
Google: Ford HEC
HEC is the instrument cluster used in 2004 and up Rangers, that has the PATS built in, you can run tests on it
As said PATS in no way monitors anything after startup, it doesn't "look at the key" again, its off-line until key is turned off and then turned back on again
So I am thinking some kind of power loss is occurring in the HEC
What about the ignition switch, how does rotating the key cylinder feel?
In 1999 Ford Rangers started to get PATS(passive anti-theft system), this is not an alarm system, no lights or horn, just prevents startup if the transponder key's number is not in the computer's memory when key is FIRST TURNED ON
After engine is running PATS is OFF, gone, done, no longer in use
PATS doesn't monitor anything and is only active when key is first turned to ON, then it either allows engine to start or doesn't
In 2006 Ranger the PATS module is IN the HEC(instrument cluster)
So for PATS to stall a running engine the instruments cluster would have to lose power, so PATS "thinks" its a restart of the engine, i.e. time to do its job
Google: Ford HEC
HEC is the instrument cluster used in 2004 and up Rangers, that has the PATS built in, you can run tests on it
As said PATS in no way monitors anything after startup, it doesn't "look at the key" again, its off-line until key is turned off and then turned back on again
So I am thinking some kind of power loss is occurring in the HEC
What about the ignition switch, how does rotating the key cylinder feel?
#4
06-11-2020
Bummer
Yes, a problem, the ground side of the vehicles electrical system is not protected by fuses, just the 12v side has fuses
Its a pain but I would start in the engine bay and test each fuse, use OHM meter, looking is really not good enough, but up to you
Pull OUT each fuse, one at a time
Also pull out each relay and put it back in, that cleans their connections
Then do the same in the cab fuse box
Yes, a problem, the ground side of the vehicles electrical system is not protected by fuses, just the 12v side has fuses
Its a pain but I would start in the engine bay and test each fuse, use OHM meter, looking is really not good enough, but up to you
Pull OUT each fuse, one at a time
Also pull out each relay and put it back in, that cleans their connections
Then do the same in the cab fuse box
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