LS-VTEC No Spark ICM problem?
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LS-VTEC No Spark ICM problem?
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 ?
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 ?
Last edited by mark11017; 01-11-2010 at 05:31 PM.
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Re: LS-VTEC No Spark ICM problem?
http://techauto.tripod.com/
check to the left side with links for ignition problems and troubleshooting
check to the left side with links for ignition problems and troubleshooting
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Re: LS-VTEC No Spark ICM problem?
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.
#4
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Re: LS-VTEC No Spark ICM problem?
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
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
#5
Re: LS-VTEC No Spark ICM problem?
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.
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Re: LS-VTEC No Spark ICM problem?
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.
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Re: LS-VTEC No Spark ICM problem?
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
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Re: LS-VTEC No Spark ICM problem?
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Re: LS-VTEC No Spark ICM problem?
ICM = .04
Crank + = .4
Crank - = .01
CYP + = .04
CYP - = .01
TDC + = .7
TDC - = .01
RPM LEAD = 11
those are my readings
Crank + = .4
Crank - = .01
CYP + = .04
CYP - = .01
TDC + = .7
TDC - = .01
RPM LEAD = 11
those are my readings
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Re: LS-VTEC No Spark ICM problem?
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
#13
Re: LS-VTEC No Spark ICM problem?
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Re: LS-VTEC No Spark ICM problem?
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
#17
Re: LS-VTEC No Spark ICM problem?
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.
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Re: LS-VTEC No Spark ICM problem?
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
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Re: LS-VTEC No Spark ICM problem?
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??
#25
Re: LS-VTEC No Spark ICM problem?
I'm currently thinking fuse 9 is blown, so check that first using your multimeter.