> > Yes. I have 12 volts to ground on hot side of fuse and no volts on load
> > side. ( with fuse pulled)
> > volts on both sides with fuse in.
> > I have checked all the simple stuff. I'm into the hard stuff now.
> > thats why I need a diagram or pinout at ecu.
> >
> > should ecu flash anything on powerup ,or ignition on, even if ecu is
> > good?
> > see earlier post "89 civic HB, no spark, not main relay or ignitor"
> > Roy
> >
> I don't have the pinout or wiring diagram, but I have a book on checking
> codes for 1983-1995 import cars. (It was part of a $35 kit from Checker
> Auto, which turns out to be a $30 book, a two dollar generic jumper tool
and
> a three dollar Toyota jumper tool.)
>
> For the '89 Civic, it confirms you don't need a tool or to do anything
> special to see the codes. It says: "Access ECU (located on passenger side
> floorboard) by pulling back the carpet. Turn ignition on and observe LED
on
> ECU for codes. Codes blinked out by LED are separated by two second pause,
> then repeated. For example, 2 blinks - two second pause - 2 blinks = code
> 2." The diagram shows the ECU at the passenger's toes, but it sounds like
> you've already gotten that far. When you do get error codes, they are
> cleared by removing fuse 30 for 10 seconds.
>
> However, the chart doesn't list a code for "no problem - working okay." I
> suppose you could unplug the crank angle sensor connector at the
distributor
> and you should see a code 8, but if you still don't what does that tell
you?
>
> The next thing might be to check each pin on the ECU connector for voltage
> with the ignition off, and verify that it goes away when the fuse is
pulled.
> If you do have that, there should be at least one solid black wire on the
> connector (the same connector if there is more than one) and it should ohm
> to ground. It's really unusual for an ECU to fail like that unless it got
> wet or voltage spiked somehow.
>
> One more thing - are you sure that's the right fuse? 15 amps sounds like a
> pretty hefty fuse for the ECU. In the '90-93 Accord it is a 7.5 amp fuse.
(I
> have a book for those models - in those models the power wire is a
> white/yellow wire on pin D1; pin 1 of connector D.) The code book suggests
> it is fuse #30 in yours.
>
> Mike
>
>
> Heres the story. I am thinking of purchasing this car from a coworker for
my
teenage son. I dont own it yet and it is not at my house. So it is not
easy to
work on at his house. I dont want to work TOO hard on "someone elses" car.
Digging thru wire bundles without a drawing would be too involved. He
hasnt
run it in about 6 months but was running when he parked it. He drove it to
work till he took over his wifes car when she got a new one.
The ecu is under passenger carpet. the led is visible thru window but I
have
never seen it flash.
I did remove connector to distributor and cranked car for about
30 seconds. no codes.
I even unplugged connectors to ecu and plugged them back in. Still no
flashes.
The fuse I refered to is under the hood. there are 5 or 6 fuses (15 to 30
amp)
and 3 relay looking devices rated 50 amps or so. They may be some sort of
breaker. It is labeled ECU 15 amp. I havent looked too hard at the fuse
block
under dash.
I tried the local honda dealer for a diagram, but was told to check back
tomorrow when the foreman was in. This dealer, the only one in town, is
known for being customer UNfriendly. So I dont hold out much hope.
Thats why Im trying the net. Always had good results from groups posts.
Roy
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (
http://www.grisoft.com).
Version: 6.0.786 / Virus Database: 532 - Release Date: 10/29/2004