(01-15-2015, 11:16 AM)Neil Wrote: I have a 1990 sidekick that blew an ECU. The caps self-destructed. I managed to pick up another from an 89. It ran great for over a year then wouldn't start one day. It has spark as it will run on starter fluid. I pulled the ECU out for the hell of it to find what I think is a diode leaking white stuff. It is marked as D17. I have searched for days on the internet to find the colour code to with no luck. It is white with a brown stripe and green dots. I have been all over this web site but cannot find a mention of it. There are lots of pictures of it but nothing saying what it is. After checking the one I took out before it looks the same with the white oozy bits so I cannot use it. If someone could tell me what it is I can try to replace it.
Thanks
there is no documentaion on inside, ecu other than my page, rare, if any.
id need a photo. close of diode.
diodes usually are only numbered, resistors have colors, mostly, (non radio tech)
what id do is find out what it does first, (reverse engineer it) then pick a valve value, amps, Vf, and reverse volts, spec.
here is my photo, add yours to gallery above.
http://www.fixkick.com/ECU/hell/html/image_3.html
if it is diode, i can see size, no photo
the 2 big diodes, the blow(both done by goons)
is
1: battery backwards protect diode,huge
2: main relay enable diode,blows only when goon hot wire the main relay, boom, smoke lets out. sad to watch,.
put a ohm meter on each diode, and then ohm it to each main connector pin, 0 ohms is continuity, if you find a pin that connects,we are home free.
dmm Resistance mode, Rx1 range, lowest)
there are many diode
i have no idea which, is it on the PCB or heat sink?
[hr
The KILL LIST:
hot wiring, injector wires. bam.
main relay or the main fuel pump side, hot wired, POOF, smoke out
same with battery reversals and alterator goes nuts (can) and blows up ECU.
same wiith hot wiring any other , ecu output pins, say goodbye to transistor pack, no longer made or sold. (not fun)
and leaking caps, and there nasty habit of putting acid in places that kill circu+its dead, for ever. some are tragic,
not all ECU can be repaired, given all damage, acid or parts not sold, (most) most of the parts are not sold, (sure caps and resistors are easy)
the best ECU is a Cardone , bar none,
http://www.fixkick.com