Pics of completed vtec OBD1 P72 ECU wiring - Honda-Tech


Pics of completed vtec OBD1 P72 ECU wiring

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Old 04-11-2011, 05:19 PM   #1
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Default Pics of completed vtec OBD1 P72 ECU wiring

If anybody could find(i could not) a pic of a OBD1 P72 ECU wired for vtec.
I would like a reference picture to help me out. i know where to wire it and what to wire but not really sure how it should look. also pictures of the sensors the wires run to would be great.
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Old 04-11-2011, 06:16 PM   #2
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

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Old 04-11-2011, 08:21 PM   #3
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

Holy Shizz! thanks man. By far the best pic/diagram i've seen. this should be a sticky or something.
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Old 04-11-2011, 08:41 PM   #4
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

^Hondapartshero

I went to check out your website and found a Honda Acura OBD1 VTEC conversion swap harness.

Is this all the wires and everything i need to wire vtec from my ECU to my motor/sensors?
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Old 04-11-2011, 08:49 PM   #5
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

one other thing hondapartshero. if im gonna have an aftermarket intake manifold, do i just not hook up the IAB? or do i need to chip/tune my ECU?
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Old 04-11-2011, 08:51 PM   #6
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

IAB COLOR(A17)* isn't that the charcoal/vapor canister?
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Old 04-12-2011, 02:24 AM   #7
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

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IAB COLOR(A17)* isn't that the charcoal/vapor canister?
No its the IAB solenoid and vacuum chamber



if you are using an aftermarket intake manifold you won't need the IAB wiring and you can just use the OBD1 VTEC subharness I sell, plus its cheaper. It includes all the wiring and connectors needed to basically plug and play. No need to chip the ECU as it won't throw a check engine light for the missing IAB's.
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Old 04-12-2011, 10:26 AM   #8
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

Ok thanks hondapartshero. I will be buying that when I get off work today. Thanks for all the help
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Old 04-12-2011, 11:12 AM   #9
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

awesome diagrams !!!!!! really easy to understand and will help a lot of people!!!!
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Old 04-12-2011, 12:31 PM   #10
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

Yeah that is by far the best pic/diagram I've ever seen
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Old 12-14-2012, 05:56 AM   #11
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

Best diagram I've seen. Just what I needed. Thanks man!
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Old 08-05-2014, 09:14 AM   #12
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

o2 sensor ground on obd1 pinouts is D22

can i connect the o2 sensor ground on ( A23 or A26 or B2 ) ?
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Old 08-05-2014, 02:50 PM   #13
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

Why would you deviate from what honda put in place?
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Old 08-05-2014, 04:00 PM   #14
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

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Originally Posted by gabrielsousa View Post
o2 sensor ground on obd1 pinouts is D22

can i connect the o2 sensor ground on ( A23 or A26 or B2 ) ?
Why?
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Old 12-29-2016, 10:12 AM   #15
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Icon5 Re: Pics of completed vtec OBD1 P72 ECU wiring

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Originally Posted by HondaPartsHero View Post
missing brown dot body ground
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Old 12-29-2016, 10:54 AM   #16
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Default Re: Pics of completed vtec OBD1 P72 ECU wiring

The body ground goes to a ground on the body or engine, although you could tap into an ECU ground it's easier to just use a good know body ground location
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