Hondata Reflash - Instructions on ECU and Immobilizer removal inside

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Old 08-22-2005, 04:23 PM
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Hondata Reflash - Instructions on ECU and Immobilizer removal inside

Finally decided to bite the bullet and get the reflash for my 2004 TSX MT/Navi. I shipped it out today and should receive it Wednesday. I purchased the reflash thru ClubRSX for $590. I will post my review later this week.

For all those interested in removing the ECU and immobilizer, here are some instructions.

Tools needed:
Philips screwdriver and 10mm socket

Removing the Immobilizer:

There are 3 screws below the column that should be removed (left, right and center). Next you must release the top portion of the column cover from the bottom portion. The easiest way to seperate the two is to push from the sides starting from the steering column up.



Next you must remove the two wire adapters and the 2 screws holding the immobilizer in place. The back screw is a little harder to reach but if you remove the bottom column cover, it is fairly easy.

Removing the ECU:

First remove the center foot-panels (driver and passenger). The drivers side panel has a screw at the top and a screw/pop connector towards the bottom.



The passenger side only has the screw/pop connector towards the bottom. After removing the screws pop the panels out.



Next remove the AC vents by wiggling them out.

To get to the ECU, you must pull back the carpeting on both sides of the center console.





To remove the ECU, you'll need to use a ratched w/a 10mm socket. There is one bolt on each side of the ECU. On the passenger side, it's easier to remove all the wires before trying to remove the bolt.

Remove the ECU by pulling it out on the passenger side.

Place a key, ECU, immobilizer and waiver form in the box to ship. I made sure to label all my contents just in case they mixed up the key, ECU or immobilizer.

Old 08-22-2005, 04:29 PM
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Nice writeup

Enjoy the reflash...I know that I enjoy mine!
Old 08-22-2005, 05:36 PM
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Thanks! Good stuff.
Old 08-22-2005, 08:10 PM
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Good write-up!
Old 08-24-2005, 12:37 PM
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Wow!!!

I just finished reinstalling the ECU and Immobilizer and I'm amazed at the difference the reflash makes. I concur with all the prior reviews from other members/hondata in that the car pulls harder. I definitely tell that there is an increase in torque and horsepower, especially after 4000 RPMs. For all those who have a 2004 this is definitely a must buy mod as it is worth the $590.

I also have the Hondata heatshield, Comptech Icebox, DC Header and Jtso throttle bypass. Thumbs up Hondata!!
Old 08-26-2005, 10:23 AM
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Old 02-16-2006, 07:34 PM
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Wow. Just thought I'd ressurect this due to the special occasion recently.

This will come in handy for me. Great writeup!
Old 02-16-2006, 10:03 PM
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For some reason, the only PITA part of that whole thing is the steering column cover. I don't know why it takes me forever to put the bottom half the cover back on. If it wasn't for that, it would take me like 15 to 20 minutes max to swap everything.
Old 02-17-2006, 09:13 AM
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Originally Posted by NJTSXMan
For some reason, the only PITA part of that whole thing is the steering column cover. I don't know why it takes me forever to put the bottom half the cover back on. If it wasn't for that, it would take me like 15 to 20 minutes max to swap everything.
You think yours is hard, I've got to swing it around my hand controls (which also must be completely removed before the shroud can be unlatched, and then reinstalled and adjusted properly)...



Actually I'm tempted to just hide my immobilizer under the dash somewhere with my valet key zip-tied inside of it, so I never have to do it again.
Old 02-20-2006, 08:46 PM
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Reposting so it's all in one thread:

Originally Posted by hondata
After this rotate wheel to the right and press thumbs in at the 1 o'clock position
Old 02-24-2006, 05:53 PM
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Updated ECU removal instructions

This web page has just been posted. Sorry it has taken so long, and thanks for the people who contributed to this thread.

There are about 22 pictures detailing the ECU's removal.

http://www.hondata.com/tsx_ecu_removal.html

It is also available as a 300K PDF.

http://www.hondata.com/downloads/tsx_ecu_removal.pdf
Old 02-24-2006, 06:40 PM
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Very nice writeup and pics. Thanks for the update
Old 02-24-2006, 08:01 PM
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thanks hondata, excellent support for your service! i think that even i can follow those directions without screwing up.
Old 02-26-2006, 07:36 PM
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wait, if i want to get a reflash!! is this mean i cant drive my car for while?? since ECU is gone?
Old 02-26-2006, 07:40 PM
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Originally Posted by rmpage
You think yours is hard, I've got to swing it around my hand controls (which also must be completely removed before the shroud can be unlatched, and then reinstalled and adjusted properly)...



Actually I'm tempted to just hide my immobilizer under the dash somewhere with my valet key zip-tied inside of it, so I never have to do it again.
rmpage, your controls are really cool. I've never actually seen how those are configured before. How do they work? Pretty seamlessly?
Old 02-26-2006, 07:44 PM
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Originally Posted by S14 n Tsx
wait, if i want to get a reflash!! is this mean i cant drive my car for while?? since ECU is gone?
Yes, your car will be undriveable while the ECU is out. The good news is that the turnaround is not usually more than three days, assuming you overnight it, of course.
Old 02-26-2006, 07:50 PM
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Originally Posted by waTSX
Yes, your car will be undriveable while the ECU is out. The good news is that the turnaround is not usually more than three days, assuming you overnight it, of course.
thanks for the reply! I guess I should do it on spring break!! Is it just plug in and plug out?? or have to mess around alittle because I am so bad with elect. I don't know anything about it.
Old 02-26-2006, 08:25 PM
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Originally Posted by waTSX
rmpage, your controls are really cool. I've never actually seen how those are configured before. How do they work? Pretty seamlessly?
Not too badly. They give great control resolution over each pedal due to the lever advantages. It sucks that I can't use them with a clutched vehicle anymore though. I miss the third pedal dearly.
Old 02-26-2006, 08:32 PM
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arg hondata, why couldn't you have posted that a week earlier?
Old 02-26-2006, 10:12 PM
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Originally Posted by dingobiatch
arg hondata, why couldn't you have posted that a week earlier?

There was this recent thread that was encouagement for me to get it done:

http://www.acura-tsx.com/forums/showthread.php?t=28858
Old 02-26-2006, 10:19 PM
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hahahahhaha ok well i feel good being an inspiration.
Old 02-26-2006, 11:44 PM
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Thanks everyone for the detailed write-up. This will definitely be helping me out in the near future.
Old 02-26-2006, 11:54 PM
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Thanks for instruction, I will try to get Hondata Ecu someday.
Old 02-27-2006, 01:44 AM
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Originally Posted by GSGOMEZ
Thanks for instruction, I will try to get Hondata Ecu someday.
Just save up $100/month. You'll have $600 by summer.
Old 02-27-2006, 09:59 AM
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does the $595, only include the over night shipping back FROM hondata? or does it include the shipping to Hondata aswell?
Old 02-27-2006, 10:53 AM
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also, did u guys unplug the negative battery cable before uninstalling and reinstalling the ECU?
Old 02-27-2006, 11:02 AM
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Originally Posted by ComptechTSX
also, did u guys unplug the negative battery cable before uninstalling and reinstalling the ECU?
Not necessary.
Old 02-27-2006, 11:58 AM
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Originally Posted by S14 n Tsx
thanks for the reply! I guess I should do it on spring break!! Is it just plug in and plug out?? or have to mess around alittle because I am so bad with elect. I don't know anything about it.
If you follow the info in this thread, you should have no problems. No electricity involved. You do have to contort your body a bit to get the second immobilizer screw out, but it's not that bad. The ECU is a snap.

It took me about 45 minutes to get the whole thing out and less time to put it all back. Definitely a worthwhile mod.
Old 02-27-2006, 12:06 PM
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Originally Posted by ComptechTSX
does the $595, only include the over night shipping back FROM hondata? or does it include the shipping to Hondata aswell?
It should include the shipping there as well. They provide you with a prepaid shipping label.
Old 02-27-2006, 12:10 PM
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Originally Posted by Tsx536
It should include the shipping there as well. They provide you with a prepaid shipping label.
When I did mine through Epic Motoring, shipping was extra, to the tune of ~$40 round trip from WA.
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