1993 Sidekick JX CEL issues

[fixkick]

cool..... bad id not cool but discovery is,,,, nice work.!!!
another ruby bites the dust..

that cap must not be dry, if its dry, the ecu goes nuts. in fact, totally unpredictable. (the regulator will drop out )
as the electronics instructor says, "never troubleshoot noise" fix it.

it if there is no acid damage, it will run good.
see no damage, i think you are very lucky.
nice looking board.

yes, some caps leak the acid slow and it just evaporates.
on some the blow through the top or side, then blow black carbon (smoke) on the lid, looks, BBQ black. (looks like candle smoke)
others just puke raw acid to the PCB, this is not good.

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this is 95 16ecu , i traced, those chips are custom and not documented on earth. Mitsubishi hybrid chips (SIPS)

here it it is. IC7 will not be happy,at all, seeing the full raw noise of the cars 12vdc system here. Brutal it is, relay noise,A/C clutch noise. injector hash noise, endless.

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the good news, its a $1 fix..... for top brand Japan made caps. no junk is only a buck.
105C rated
at a whole 23 cents.

http://www.mouser.com/ProductDetail/Nich...dcJx4%2feG