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Mitsubishi io

posted May 09, 2016 12:48:18 by CyrusKiur
Keeping shorting ignition coil.coil has 3 wires one for power 12 volts,one for ground and a pcm controlled wire.the power wire has a capacitor.wen u switch on position one coil must burn.checked all wires and no short at all.what could be the problem?I think it pcm.
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12 replies
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Tyler said May 09, 2016 14:22:56
Hey man! I'm not familiar with the Mitsu IO, isthere one coil, or is this a COP system? If COP, does it keep burning the same coil?

I'd suggest getting a scope/meter on that PCM control wire and look for voltage. With the key on, engine off, there should be NO voltage on that wire.

Normally, you'll find zero to three or four volt ramps on that wire, which controls the transistor inside the coil. Let us know what you find, and we can go further.

Check out the ScannerDanner Nissan three wire COP video, operation is the same (I'd link you, but I'm on my phone).
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CyrusKiur said May 09, 2016 15:05:47
Am using digital multimeter.doesn't burn that one only but number 3 and 1.koeo the control wire has 0.1 volts koer i get 0.34 to 0.8 volt.but today someone has told me that it started burning the coils after he bypass test.he connected the wire from battery positive to control wire and fired for like 20 seconds.then from there the pcm started to burn number 3 and 1 the same coil he bypassed(it's COP)
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Dylan said May 09, 2016 16:50:20
.he connected the wire from battery positive to control wire and fired for like 20 seconds.then from there the pcm started to burn number 3 and 1 the same coil he bypassed(it's COP)


Oops. Why did he connect battery positive to the control wire?
Digital multimeters are too slow. They give you an average. I can understand that not everyone has a scope. But it's a good investment and there are pretty decent and cheap scopes on the market. Just saying.
Belgium, Europe
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CyrusKiur said May 09, 2016 17:33:17
Oh good i have imported just a simple scope for only 2 channel.Thank for the advice.now could it flyed pcm transistors?Paul says to use tester wen bypassing test.
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Dylan said May 10, 2016 10:44:00
Since you have a scope I'd check signal.
Belgium, Europe
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Dylan said May 10, 2016 10:45:33
Normally, you'll find zero to three or four volt ramps on that wire, which controls the transistor inside the coil. Let us know what you find, and we can go further.
Belgium, Europe
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CyrusKiur said May 10, 2016 12:02:39
I don't have scope now but coming soon.Thank u
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Dylan said May 10, 2016 16:27:14
Here's the video on this Nissan that Tyler mentioned I think:

https://www.youtube.com/watch?v=UwQVg0CtkuQ






Belgium, Europe
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Tyler said May 10, 2016 17:44:08
Thanks for the assist Dylan ;-)
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Dylan said May 10, 2016 18:12:58
Anytime ;-)
Belgium, Europe
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john deaver said May 25, 2016 00:58:36
is this the gdi.....can you get another computer to swap
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CyrusKiur said May 25, 2016 07:14:20
I did so and everything is ok
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