Honda Civic (2001 - 2005) Coupe / Sedan / Hybrid (Includes Acura EL)

Multiplex Control Unit

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Old Aug 9, 2010 | 06:59 PM
  #1  
mappenzellar's Avatar
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Default Multiplex Control Unit

I have seen numerous threads about how to replace a MCU, sites that "could" sell then, etc. but does anyone have a direct link or part number for a 2001 Honda Civic, 2dr, ex multiplex control unit?
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Old Aug 9, 2010 | 09:31 PM
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Default Re: Multiplex Control Unit

this got me all confused
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Old Aug 10, 2010 | 02:55 AM
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Default Re: Multiplex Control Unit

It's inside the under-dash fuse box. To replace:

1. Disconnect battery and wait at least 3 minutes.

2. Pull all wires in front of fuse box.

3. Take out bolt on bottom of fuse box and slide down out of the bracket.

4. Disconnect all wires in back of fuse box

5. Replace and install in reverse order.

Good luck.
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Old Dec 10, 2010 | 03:34 AM
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Default Re: Multiplex Control Unit

So I did the steps exactly above but when I did this, it fixed the problems, however created a new one. The new fusebox/mcu caused the gear shift to not come out of park, put the old mcu back in and could get out of park but had the same issues as before.
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Old Dec 10, 2010 | 09:54 AM
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Default Re: Multiplex Control Unit

Originally Posted by mikeapp
So I did the steps exactly above but when I did this, it fixed the problems, however created a new one. The new fusebox/mcu caused the gear shift to not come out of park, put the old mcu back in and could get out of park but had the same issues as before.
any chance there's a difference between MCU's for manual vs automatic cars?
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Old Dec 10, 2010 | 09:58 AM
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Default Re: Multiplex Control Unit

Originally Posted by theineffable
any chance there's a difference between MCU's for manual vs automatic cars?
hah no clue, maybe?
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Old Dec 13, 2010 | 09:33 AM
  #7  
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Default Re: Multiplex Control Unit

Anyone...any thoughts on this?
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Old Dec 13, 2010 | 10:45 AM
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Default Re: Multiplex Control Unit

Originally Posted by theineffable
any chance there's a difference between MCU's for manual vs automatic cars?
Yes. You need one for the correct tranny.
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Old Dec 13, 2010 | 11:24 AM
  #9  
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Default Re: Multiplex Control Unit

I went off of this link:

http://www.hondaautomotiveparts.com/auto/jsp/mws/prddisplay.jsp?inputstate=5&catcgry1=CIVIC&catcgry 2=2001&catcgry3=2DR+EX&catcgry4=KA5MT&catcgry5=CON TROL+UNIT+%28CABIN%29


but I don't see an option.
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Old Jun 19, 2012 | 05:59 AM
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From: Bartlett, tn, USA
Default Re: Multiplex Control Unit

Sorry to bump a really old thread, but my gf just bought a car from an auction (2002 LX) and it looks like this part went bad. No ac no power door locks. Also the car didnt come with the keyless entry although it has it.

The car is currently sitting at the shop, the guy says he really see's no point of this and can bypass everything to make it work. Is this a part i should actually replace or will bypassing be completely fine?

She has plans on putting in a remote start with an alarm down the road.

edit:Hate how it says trail user i been a member since 05 ej1_jdm

Last edited by mark.manalata; Jun 19, 2012 at 06:07 AM. Reason: edit
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Old Aug 27, 2021 | 02:45 AM
  #11  
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Default Re: Multiplex Control Unit

Originally Posted by mark.manalata
Sorry to bump a really old thread, but my gf just bought a car from an auction (2002 LX) and it looks like this part went bad. No ac no power door locks. Also the car didnt come with the keyless entry although it has it.

The car is currently sitting at the shop, the guy says he really see's no point of this and can bypass everything to make it work. Is this a part i should actually replace or will bypassing be completely fine?

She has plans on putting in a remote start with an alarm down the road.

edit:Hate how it says trail user i been a member since 05 ej1_jdm

i know this is a really old thread but, what did you guys end up doing? Just bought the same car and have the exact same situation lol.
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