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Unread 07-10-2013, 11:30 AM   #1
rmallory
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2000 TJ Wrangler 
 
Join Date: Jun 2013
Location: Monument, Colorado
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ax-15 swap and torque converter code

Swapped out a 32rh for an ax15. I get the torque converter code, so I have ordered two ecu's from a salvage yard in Denver. Both have resulted in immediate start up but then shut down after about 3 seconds. Blogs suggest problem is ecu's came off wranglers with sentry systems and is looking for chipped key and VIN codes. Jeep is 2000 wrangler with ecu 56041658af. The replacements have been 56041652ae and af respectively which are 2000 MT ecus's fed emissions. Any way to confirm problem is security system issue and not something else. Any way to know ahead of time if an ecu came off a non-security system vehicle. Any other solutions to the problem? Thanks in advance.

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Unread 07-10-2013, 11:39 AM   #2
chriskeenan
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1999 XJ Cherokee 
 
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Location: Colton, Oregon
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The ecus for security and non security equipped jeeps are the same part number. what happens is when the security module is plugged in the ECU will permanently "bind" to it and do the 3-5 second shutdown if the security module is removed or the ECU is place in a vehicle without one.

Easiest way to tell is the security equipped models will have a grey key, other than that if you pull the steering column apart you will see the security module/receiver around the ignition switch.

There is no known way to undo an ECUs security requirements once its been activated.
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Unread 07-10-2013, 02:10 PM   #3
rmallory
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Thanks, the problem I have is the salvage yard that has them is an hour and 1/2 driving distance and they have parted out their vehicles without documenting what options they had. They can't tell me if the ecu they are sending is activated for security or not and I am assuming they are when they start up but then shut down after 3 seconds. It would seem an ecu from a security activated jeep can't be used on any other jeep or is their a way to reprogram a security activated ecu to a different VIN, etc? I ask because I can't help but wonder if the salvage yard has a bunch of security activated ecu's left over that they want to unload and the only way to resolve is to drive up there and test a bunch until I find one that works.
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Unread 07-11-2013, 05:48 PM   #4
chriskeenan
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you could always just add the security system to yours, the wiring is already in place you just need the receiver, the keys, and the keys programed
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Unread 07-16-2013, 11:13 PM   #5
rmallory
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2000 TJ Wrangler 
 
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Location: Monument, Colorado
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Quote:
Originally Posted by chriskeenan View Post
you could always just add the security system to yours, the wiring is already in place you just need the receiver, the keys, and the keys programed
I would need the key and the receiver from the vehicle the ecu came out of as the ecu is linked to that specific chipped key and receiver. My understanding is that once the ecu is linked, only way to undo it is to reprogram the ecu which isn't cheap to have done. The salvage yard I am dealing with did not keep keys and receivers and can't tell me if ecu is security enabled or not. I decided to send my ecu to http://www.autocomputerperformance.com/ and pay to have it reprogrammed and security disabled. Will cost $150. I will post after I get it back and report if it works or not.
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Unread 07-26-2013, 08:19 PM   #6
rmallory
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I got the reprogrammed ecu back from http://www.autocomputerperformance.com/ After install, everything works and no CE lights. Kind of pricey, but it is working. Will post again after longer period of time to confirm stability.
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Unread 08-01-2013, 08:10 PM   #7
jay-h
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might have been easier to get the original system reprogrammed to eliminate the automatic options.
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Unread 08-03-2013, 06:57 PM   #8
rmallory
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2000 TJ Wrangler 
 
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Location: Monument, Colorado
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Lots of wheelin' and several tanks of gas. No codes. All is working well. Everyone I talked to has said an ecu for an automatic cannot be programmed to a manual. Does anyone know if that is possible?
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