Hi, i got this p28-g01 but got check engine light, i try to open and found that c18 and circuit are burn. Car cannot start like no fuel go to engine. Here i attached burn area. What c18 function for? do not get enough info through google or wiki

 

The +C18 capacitor and +C17 capacitor circuits connect with R136 (resistor) and to ECU connector Pin D10/ELD, Electronic load detector. +C16 (capacitor) goes to +R21 (resistor), +C4 (capacitor) and to ECU connector Pin B1. That is the ECUs Ignition switched Battery voltage Power source. So what ever is on the (-) side of C16 isn't getting any power.

 

Thanks GhostAccord, i just check all connectivity copper trace, seen like it burn and lost connection from c16 to +R21. I will jump the trace back and replace new capacitor and look if car can start or not.

But c16 and c17 do not have any marking on it, actually what type capacitor is that and the value..seen it have + - i confuse either it ceramic or any else type of capacitor.

 

C16 is a 1uf 35v tantalum cap
C17 is a 4.7uf 16v tantalum cap
C18 is a 220uf 10v 105°C aluminum cap

 

Thanks, really appreciate that, for now need to wait till sun appear, drive electronic shop buy the part. It is necessary if i replace all electronic cap on board since this ecu age above 10 year to avoid any capacitor blow.. or just leave it were it been..


tantalum reference :
http://www.computescotland.com/commo...tages-3469.php

http://www.rr-cirkits.com/parts/parts-caps.html

 

whenever I get one in I replace them for piece of mind.

 

Got the tantalum cap yesterday, replace and solder back the burn component and track, also check another cap, there also burn c19, so i just change all aluminum cap. Test to start..then..... it working. Where can i find obd1 board circuit diagram, maybe some url or keyword or person sell the obd1 circuit diagram?

 

I have yet to find a complete one....I have only ever found circuit diagrams of an individual circuit here and there. I use an old OBD1 ECU that I carefully removed every single component. Now I have a blank circuit board and I have stuck all of the components onto a foam board. This way I can check circuits individually without any clutter.

 

Wow great idea, i think i need make this one

 

holy hell....thats more work then i would ever care to do.

 

Lol, same here... You have way too much time on your hands!

 

So what do you do with your spare time? Some people, myself included, like to learn new skills in there spare time. This is an example of how I nailed my soldering technique down. Not bad when you can make $50+/hr for a hobby.

 

lol, I don't have any "spare" time...

 

Hm i think that the only way to get full circuit obd1 board..

 

Sorry to hear about that!

 

Having this attitude towards life will take you a long way and make you a successful in what you do. Fair play man !

 

i know this is old but iam getting code 3 CEL MAP sensor, the ecu is bad, i replace all the aluminum capacitors still the same problem, so i search on the web and find that C18 and C17 are MAP sensor related capacitors, can anyone confirm this plz

 

i use my D10 to connect my wideband

for 2 years this was working great.
now sometimes my D10-ELD dont work.
anyone knows what are the capacitors on D10-ELD circuit to replace them ?

 

I wish I could give GhostAccord an award. *Slow Clap* sir.

 

Good day I have a problem with an ecu of my civic is a p28 step the key and until you turn off the check engine light does not turn the engine probe with another ecu from a friend and caught carriage once someone knew what his ecu problem or someone happened

goes like this video

 

PM me if you want to get your ECU fixed.

 

What is the transistor and capacitor code..pl find it