mark11017

Not getting spark, checked for readings at the distributor plug here's what I got with key on ON position

ICM = 0
Crank + = .4
Crank - = .01
CYP + = .04
CYP - = .01
TDC + = .7
TDC - = .01
RPM LEAD = .11

any help would be great thanks in advance

checked for voltage on ecu for ICM got 0, is there a fuse ?

HondaPartsHero

http://techauto.tripod.com/

check to the left side with links for ignition problems and troubleshooting

mark11017

thanks good information but i need a diagram showing ICM to and from ECU im not getting power at the distributor plug and the ecu.

z6htch

Was your tach jumping around prior to this happening? If so, your icm is probably bad b/c it sends a signal to your tach and if its going bad it will make it jump around.

Also did you check your coil? I had the same problem and one second my car would run and one minute it'd shut off and not get spark for another couple hours after sitting. So...try starting it after letting it sit and if it starts, you can assume its the coil but if not, its probably the coil anyway lol.

The coil and icm are the same for d and b series dizzys, obd1 and obd2. Not sure about h series. But I'd try to find one at a junkyard b/c a coil runs about $80 new at Honda and $180 for the icm. Hope this helps

J240sx

I agree with the tach jumping and yes H's are the same. You just have to make sure the pins off the ICM are the same, as some are different. ICM's do seem to be pretty common, as i had one go out. I'd try that.

mark11017

Hmm well the car was running yesterday, its just my harness shorted out and I redid the wires. How much volts does the ICM see at ON? Because im now getting .04 at the ecu and at the diz plug.

mark11017

bump any more ideas? i noticed fuse 54 under hood is blown would that have anything to do with this? getting .04 at ICM on yel/grn wire is that correct voltage

Former User

A blown fuse 54 would not prevent spark.

What's the voltage on the Blk/Yel wire with the key in ON(II)?

mark11017

voltage reads 11 on blk/yel wire

Former User

What's voltage on the Wht/Blu wire attached to the ICM?

mark11017

ICM = .04
Crank + = .4
Crank - = .01
CYP + = .04
CYP - = .01
TDC + = .7
TDC - = .01
RPM LEAD = 11

those are my readings

mark11017

Ok I guess i dont have readings for that wire ill check when i get to my car, what should it be? and if it isent what should i check next

Former User

If the Wht/Blu wire has battery voltage, then the ICM is most likely bad and needs to be replaced.

mark11017

The car ran the day before I dident drive it yet becuase of other problems leading to my harness,the harness was a mess and needed to be fix and since then im not getting spark but my other problems are gone. im almost positive the only wire not getting current was the yel/grn but i cant say for sure

mark11017

Ron I checked for the white blue I see it but it's not going to the ignitor as far as I can tell

mark11017

Ok now blk/yel wire has no volts...

Former User

There should be a Wht/Blue wire that runs between the coil and ICM. If that's missing, then you definitely won't have spark.

The blue wire, if you have one, attached to the ICM is for the tachometer.

Edit: The Wht/Blu wire is a blue wire for the Hitachi distributor. Do you have a blue wire running between the coil and ICM. If so, does it have low or no voltage? If the latter is true, resistance test the coil.

Former User

You checked with the key in ON(II), right?

What year Civic?

mark11017

yes key was ON, and its a 99 civic si

mark11017

seems like the distributor is not getting power then ?

Former User

Correct.

Check whether 15A fuse 9 under the dash is blown.

mark11017

i had checked the fuse last night it was fine, the blk/yel wasn't getting 0 volts but it was an extremely low amount

Former User

Use a multimeter to check voltage at fuse 9 as described here.

When you turn the key to ON(II), do the dash warning lights turn on? Does the fuel pump prime for 2 seconds?

Is the distributor connector tightly seated?

mark11017

All dash lights come on as expected, im on obd1 jut fyi, and yes my pump comes on 2 seconds shuts off. ill check the fuse when i go back to the car its not at my house. but if its not blown then there must be a short after the fuse??

Former User

I'm currently thinking fuse 9 is blown, so check that first using your multimeter.