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Hacking up Honda's ECU
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PostPosted: Wed Aug 22, 2012 7:09 pm 
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Joined: Wed Dec 22, 2004 1:50 pm
Posts: 172
hey guys,

somone came to me with a ef hatch with a obd0 to obd1 convertion, that was tuned with AEM EMS (so there was no CEL). the car ran fine and everything worked ok,

so he came to me and he wanted to step back to a chipped p28.

i had the car for a few days so i could inspect it to make sure everything is ok to start tune it,

OK, here is the issue,
when i turn the key to ON solid cel comes on and stays on until i start the car, when i start the car the cel turns off,
(when i jump the scs connector nothing happens, when i ground D4 nothing happens.)
while the engine is running. if i pull one of the sensors connectors, the cel stays off.


while dataloging\tuning on crome, if i pull one of the sensor connectors i'm getting the cel on crome, and still nothing on the dash,

so i know everything in the tune\ecu and the majority of the wiring is ok.(since i'm able to tune it)

any ideas guys?

thanks


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PostPosted: Wed Aug 22, 2012 8:32 pm 
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Joined: Thu Feb 12, 2009 7:47 pm
Posts: 35
Location: Poland, Gdansk
check if cel is switching off same time as oil pressure indicator ;) also check with multimeter if A13 is acting like cel


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