General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Motor ECU damage

Old Oct 4, 2018
  #1  
kentcraig11493's Avatar
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From: Forest city N.C.
Motor ECU damage

I have a 2002 3.0 4x4 regular cab ranger I have completely rebuilt and rewired everything the Previous owner had mucked up as I pulled the connector from the ecu I noticed a broke pin, my question is how do I go about replacing this and what all does this entail, keep in mind I have no key the ignition switch is broken can be started by just turning the switch with out a key, I plan of fixing this issue also but i can’t seem to find any information on the issues from what I have read I’ll need new keys and need them programmed to the ECU any help would be awesome thanks in advance

 
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Old Oct 4, 2018
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You may need new PCM, thats what Ford calls their engine computer/ECU

But find out the Pin Number first, many are not used
Look at this picture: https://www.ranger-forums.com/attach...plorer-pcm.png

This is the CONNECTOR side not PCM side

If that Pin is not used then no issues
If you post the Pin number I can look it up on 2002 PCM

Yes, 1999 and up Rangers with V6 engines used PATS(passive anti-theft system)
In 2002 PATS is in the PCM
So if you get a new/refurbished PCM then make sure it comes with KEYS

There is a transceiver(wand) around the key slot, this connects to the PCM
When key is turned on PCM "reads" the Keys unique number via the Wand, and it will compare that number to the numbers in its memory, if there is a match then Fuel Pump will come on and Fuel Injectors will work
If there is no match then no fuel pump and no injectors
Some years also disabled starter motor if there was No Match.

Most mobile locksmiths have Ford software on a laptop so can make/cut PATS keys and then add them to the PCMs memory



PCM part numbers can be confusing, yours is 2L5A-12A650-BD
2L5A = 2002 Ranger
12A650 = Ford part number for ALL PCMs, not model specific, every PCM Ford uses has this number in the center
BD = Revision number, its important but not exclusive, meaning many revision number will work as replacement, Ford never released any documents on these numbers

BRN3 = this is software package that was loaded to the PCM at the factory, very important number, it needs to be match as close as possible, again Ford never released what these number mean
 
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Old Oct 4, 2018
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kentcraig11493's Avatar
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From: Forest city N.C.
PIN number 99

It’s number 99 I don’t see anything in the chart so I’m assuming good also thanks for the info your always helpful
 
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Old Oct 4, 2018
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In my 2002 3.0l wiring I show pin 89 as fuel injector #6

In 2001 its pin 99 for injector 6
In 2003 its pin 99 for injector 6

So wondering if 2002 is a misprint
Went back to 1998 3.0l and pin 99 is injector #6, so thinking it is needed

Is there a wire on connector for pin 99?
If there is and its Light Green with orange stripe then pin 99 is needed for injector #6
 
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