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1989 Daihatsu Charade stopped spark, no ignition
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rsplinter
Novice
Oct 16, 2013, 1:39 PM
Post #1 of 9
(7681 views)
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1989 Daihatsu Charade stopped spark, no ignition
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Model year: 1989
Vehicle: Daihatsu Charade
Mileage: 345000
Engine 3 cylinder 1 Liter
My car has lost its spark.
The starter motor will crank but I measure no spark with a timing light, not on main cable from coil nor on spark-plugs
Replaced the ignition coil with no effect.
Checked the fuses and relays I am aware of and all seem good.
Maybe I am overlooking a fuseable link?
I am holding off on buying a new igniter, $250 and currently unemployed.
The car started running rough shortly before, only during idle, but was still getting 45 mi/g
I need my car to look for work and am in desperate need of assistance on troubleshooting.
Thank you kindly in advance
Splinter
(This post was edited by rsplinter on Oct 16, 2013, 1:41 PM)
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 16, 2013, 4:26 PM
Post #2 of 9
(7657 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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When you crank the engine is the distributor rotor rotating?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 26, 2013, 11:31 AM
Post #4 of 9
(7620 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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The ignition system on your vehicle is pretty much the same set up you would see on a Toyota 4AFE, except your igniter and coil is separate from the distributor.
There are two sensors inside the distributor, one called NE and the other G, that send crankshaft position signals to the engine control unit. The engine control unit (ECU) signals, on the IGT circuit, for the igniter to fire the coil when it recieves the signals from the NE and G sensors. When the coil fires, a signal called IGF is sent back to the ECU from the igniter to tell the ECU that the igniter has fired the coil.
One easy thing you can do to eliminate the coil and igniter is to do a bypass test. You need an incandescent (not LED) 12 volt test light.
Basically what you are doing with the test light is creating a signal on the IGT circuit to tell the igniter to fire the coil. If the coil fires, when you simulate the signal using your 12 volt test lamp, that means the igniter has power and ground, the igniter is functioning, and the coil is good.
Watch vid to perform bypass test:
http://www.youtube.com/watch?v=VG3EZJlyjl8
This is what it looks like on an oscilloscope with the engine running
The blue trace is the G sensor signal
The red trace is the NE signal
The green trace is the IGT signal from the ECU to the igniter
The yellow trace is the confirmation signal from the igniter back to the ECU to say it has fired the coil
[/img]
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Oct 26, 2013, 11:45 AM)
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rsplinter
Novice
Nov 9, 2013, 2:24 PM
Post #5 of 9
(7577 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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the described test to the IGT produces a spark of the removed ignition cable to ground.
Good so far
What can I try next please?
R
Splinter
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rsplinter
Novice
Nov 27, 2013, 7:30 AM
Post #6 of 9
(7547 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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My quest appears to have no solution just yet,
It took me three weeks to find someone to let me charge my battery to test the IGC bridge for spark.
I do get a spark, but I still do not know what can be the cause of the problem and have no car.
Public transport and walking is not an ideal solution and I appreciate any new dive for my diagnostic process.
Cheers,
R
Splinter
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rsplinter
Novice
Nov 27, 2013, 9:21 AM
Post #7 of 9
(7539 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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Thank you,
Just to clarify, I only have the 'instantaneous' spark when I apply the "bridge" with the wire and lamp from the "ignitor/coil" to the battery as outlined in the video; not when I turn the ignition key.
I don't know if that changes the diagnostic scenario from your suggestion, but I feel hopeless on this and time is wearing me down.
Much obliged,
R
Splinter
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 27, 2013, 10:22 AM
Post #8 of 9
(7528 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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He stated he has spark by performing the igniter bypass test, but no spark during cranking. You need to see if you have signals coming out of the distributor to the engine computer.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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rsplinter
Novice
Nov 27, 2013, 12:01 PM
Post #9 of 9
(7519 views)
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Re: 1989 Daihatsu Charade stopped spark, no ignition
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Thank you kindly,
I will retrace the wiring diagram and see how I may check for communication between distributer and computer.
Maybe there is a shortcut to check this that I am not aware of
R
Splinter
(This post was edited by rsplinter on Nov 27, 2013, 12:03 PM)
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