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Hacking up Honda's ECU
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 Post subject: Rebuilding old Ecm
PostPosted: Mon Dec 30, 2019 10:49 pm 
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Joined: Mon Dec 30, 2019 10:32 pm
Posts: 1
Hi guys, i replaced the ecm in my 95 accord ex Vtec, because it kept throwing me code 9s even though i had changed the distributor like 3 times. Anyhow, in an electrical test where i probed the wires for the bad sensor, it was giving me really high resistance on the multimeter, which both my honda instructors said was either rust or a bad component, leaning more towards bad component as both me and my instructor couldnt find any rust. My question is can i find the bad component(s) and replace them, and what would they most likely be?

note: I did search the forum and someone had said IC17 TA8903 but im not sure if that is correct or not


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 Post subject: Re: Rebuilding old Ecm
PostPosted: Mon Mar 09, 2020 5:00 pm 
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Joined: Mon Sep 26, 2005 11:52 am
Posts: 2046
Location: Morgan Hill, Ca
Altruistic_Sock wrote:
Hi guys, i replaced the ecm in my 95 accord ex Vtec, because it kept throwing me code 9s even though i had changed the distributor like 3 times. Anyhow, in an electrical test where i probed the wires for the bad sensor, it was giving me really high resistance on the multimeter, which both my honda instructors said was either rust or a bad component, leaning more towards bad component as both me and my instructor couldnt find any rust. My question is can i find the bad component(s) and replace them, and what would they most likely be?

note: I did search the forum and someone had said IC17 TA8903 but im not sure if that is correct or not

we dont have a schematic for that specific ECU...

you will have to trace out that input to where it goes... probably one of the HIC daughter boards, or one of the larger multi-transistor arrys.


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