Testing Toyota's Four Wire Ignition Coils The Low Tech Way
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- Опубліковано 5 жов 2017
- Brian Eslick from How to Automotive www.howtoautomotive.com/ takes you step-by-step through the process of testing Toyota's four wire ignition coils for misfires. All test are done low tech with out fancy test equipment.This video is sponsored by Bosch.
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Owing to factors beyond the control of How to Automotive/Brian Eslick, it cannot guarantee against unauthorized modification of this information, or improper use of this information. How to Automotive/Brian Eslick assumes no liability for property damage or injury incurred as a result of any information contained in this video. How to Automotive/Brian Eslick recommends safe practice when working with power tools, automotive lifts, lifting tools, jacks and jack stands, electrical equipment, blunt instruments, chemical lubricants, or any other tools or equipment seen or implied in this video. Because of factors beyond the control of How to Automotive/Brian Eslick, no information contained in this video shall express or imply warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or information contained in this video is the sole responsibility of the user and not How to Automotive/Brain Eslick. #howtoautomotive - Авто та транспорт
Awesome explanations; the coils are like the V6 Toyota Sienna I have.
good and simple tip to disconnect each coil and listen for RPM 'lack of drop' to spot a faulty coil. Any back-yard mechanic can do it
Awesome video, thanks for the help
Hi sir.
Please, i need to inform me the c.o.p 4 pins wiring, functions, and what about the signal polarity, and voltage ?.
Many thanks
Good explanation mate , good on ya
Awesome video! It was very helpful 👍
Walter Winiana Glad to heat thank you for watching!
Thank you for this video!
I had a persistent p0302 code on 2000 celica gt. You mentioned it might be electric if error stayed on same cylinder despite coil switch. But if it was electric, why would there be a spark? All injectors replaced, no oil leak, compression good across all 4. What might still be the problem? Do you have video tutorial on how to test electric connector? The car runs fine except for the engine light comes back on after reset.
Best information my dear.
Great video, I have a 2002 Tundra that is throwing the igniter code for the entire drivers side bank, cylinders 1, 3, 5 ,7. I suspect it is a ground issue. I want to test the ground at the coil plug, would i connect my multimeter to the negative battery terminal and then touch the ground wire on the clip? Or do I need to find where the coils are grounded on the engine and use that as the grounding point for the test?
I love it when just by chance it’s your engine in the vid
Just a male thing😂
Brian, I have a 97 Rav4 that has been making a knocking/rattling yype noise for a while. I'm certain it's not an engine or spark knock. It has over 200k miles & burns a good bit of oil which I check & refill every few days. Yesterday I was driving slow on a back road and out of the blue it shut off. I checked the oil (full) and all other fluids, etc were good. Belts are intact, battery good... It will not crank. It sounds like the starter is turning but the engine isn't turning over. Any thoughts or ideas you might throw at me?!?
Thanks in advance!
How do you get the coil out if it wont slide out after its disconnected and the securing scew have been removed? I keep pulling and wiggling it but it wont budge,
Thank you. Great help.
can you also back-probe for resistance in ohms?
if a bolt is loose and wont tighten can you use a longer bolt to tighten a coil pack?
This really helped me. However after all this testing, I swapped plugs in cyl 4 to 6 and code followed. I had a failed Iridium plug with only 15,000 on it. never would have guessed. So I say have a new plug on hand to rule out it besides coil pack
Excellent info
My car Toyota corolla xli 2011 model have a problem' few minutes run then stop engein what is the problem sir how can I fix it.
Great video, thx for the knowledge.
Ss Man Always thank you for watching!
Hi I know tis video is old but I have a question regarding the connector wires? 2 of the connectors on my Camry completely fell apart and now I am not sure the order in which the wires go back into the new connector I've purchased. How do I know what order the wires go? I have not been able to find a diagram for this particular car. Do you have any pictures I can take a look at to see the order in which the wires are connected?? Or any other way of knowing what order they go???
Hello my 06 Toyota Avalon shutdown while driving it being checked found short circuit on coils pls help any suggestions where to look not even an electrical could find
Awesome and I am able to identify problem one.. thanks a lot
Spsk thank you for watching
Any way Sir, I changed the 2 coils #1 and #2 but no effect at all the same problem/thanks
I have a spark tester but i dont have that orange foam that you put in the cylinder. What is that?
Thank you for your help!!
estelita thank you for watching!
The top plastic part has a crack (hit buy a wrech when I installed them back), just the outer plastic, not the Epoxy, will I have to buy a new one? It's pretty expensive and the coil is very new.
can you verify the wire leads off the coil as I have a diagram which state that what you mentioned to be the power and ground leads are reversed. Also judging by the color of the leads in the video, it may be reversed from what you mentioned.
Brian, good video and info for diagnosing misfires this way is universal way for all make and models thanks for sharing. cheeers
j georges thank you for watching!
j georges
Agreed J! Thanks Brian.
Question, is it safe to unplug the coils while the car is running on a 2010 Prius?
Does anyone know what to do with a cylinder 1 misfire detection on a 2011 Toyota Corolla?
excellent very good explanation, i was having problem with my toyota camry 2004, and following your instruction I could solve the problem Thank you
enrique francisco carela moya Glad the video helped. Thank you for watching!
Hopefully you went with a Denso coil and not Bosch or you probably had to watch this video a year later.
Thank you
Explain it in detail what's inside the Coil.. I want to know
Hi my car commodore vz v6, found cylinder 2 misfire for make sure I swap #2 with #4, than check again but still cylinder #2 misfired instead of cylinder #4. Please advise me Thanks
I have the exact same issue. Did you figure it out
Hi there! So with the coil swap test, after swapping coils should we wait for code to change on its own or do we clear the CEL and wait for it to come back on? How long does it usually take after the reset?
Would of helped if you told us what year rave it is
I am having Coils issues with CEL code of P0351/52/53/54 I replaced all Spark Plugs with NGK and all 4 Coils with Denso. And I'm still having the same issues. The cars has cut off on me while taking off at a stop sign or light and sometimes it has cut off while parked. It's 2006 Corolla CE Manual. Some people have told me it could be the ECU. Others have told me that it could be the fuel pump. Others have told me that it must be a ground problem. I had reputable mechanic check the car and I was told that the wiring is fine, but the mechanic couldn't figure out what was the issue. I've had this car for almost 5 years and it had never given me any issues until now.
Good video 👍🏻
Thank you!
Hi I have a 2001 corolla with check engine light for a misfire in cylinder 1.switched all 4 spark plugs out with new ones and light is still on so I proceeded to pull every plug from the coil 1 by 1 but when I did that the car wouldn’t start for any plug. Any idea why it shows a misfire in cylinder 1 ?
Alberto Garcia Take the ignition coil from one and swap it over from two and two to one. Now drive the car iif the misfire now switches to cylinder number two you know it’s the coil. If it still shows number one then I would do a compression test.
Won't it damage computer or pcm unplugging coils while engine running 🤔
dear brother please teach us Car Ac wiring diagram
Hello, What is the Diagnostic tool that you are using to read the engine? and how much does it cost? if Expensive is there a smaller home use version that does the same thing?
Patrick Habegger this was a Autel scanner. More of a professional tool. For home use I would recommend The Autel AL319 it’s not very expensive. Here is an affiliate link for it
amzn.to/2MAgRYy
Dear Sir. I have 2006 corolla manual type the problem the cylinder 1 and 2 not working but there is current from the coil.
I tried to un- plug the coil form spark plug 1 the rpm not change and also #2. The #3 and #4 if you un plug the coil the rpm is going down. possible what cause this problem.Thanks
Spark plugs and or wires
if the valve cover is leaking a slight amount of oil into the spark/ignition coil tube, would that effect the operation of the ignition coil?
Kyle Bjalme over time it will affect how the coils operate. I would fix it as soon as you can.
@@HowtoAutomotive mate, could you please help me,. I got a 2004 Camry & about 2 weeks ago, the car started normal, but shortly after the car jerk & a rotten egg smell with smoke occured, it also showed the check engine light, started the car again with some difficulty while accelerating; that is been the norm since then, sometimes it starts without accelerating, .I replaced the maf sensor, but still the car's rpm doesn't go over 3000 & it jerks with hesitation upon reaching it, what do you think it could be the problem & what scanner I should I use for your help & response thank you.
@@glorianica428hey not a mechanic but I hope I can help or draw attention to your problem. It sounds like it could be a fuel pump going bad just from my initial thoughts. You can check it at any auto parts store by asking them for a check engine diagnostic through the obdII port for free. Sorry your car is messing up mate.
@@colinknutsen Thank you, for your time & input, blessings.
@@glorianica428 Catalytic converter
On a 2010 0r 2011 corolla from my experience and my brothers if one coil is bad change them all. I changed one on a friends car because i only had 1 cylinder misfire code. After i changed it i had intermittent codes on 2 other cylinders. If a coil is dead completely the ECM will turn off the injector. The injectors are easy to get to so you can listen for a click with a screw driver. I wasted time checking for a broken injector wire.
Hi please show me how to erase the igniter codes after pulling the coils for testing.
velocity800 you need to use a code reader or scan tool to clear the codes.
God bless your heart, this is the best ignition coil testing video with the right tool, not the one, where they connect the electrical connector to the tester, while the coil still in the engine, is the coil or plug in question,.I knew my basic electronics was not wrong, thank you, will be buying that orange tool.
How about including a pin diagram?
Nice video. What should be the resistance reading of the ignition coil? Cheers
Mao Callejo unfortunately I don't have those type of specs memorized and I'm not anywhere near a computer for a while.
@@HowtoAutomotive are you near one now?
hello guess please I have a camry 2.4 diagnostic error p0351 p0352 p0353 p0354 starts and stalls
Hi I got Toyota estima 04 & git miss fire engine
my coils are good, but still getting p0303 cylinder 3 misfire message, I installed new spark plugs, and bought a new coil, tested and switched on each one, still getting misfire message, any ideas?
oosveluzo levso Check compression and make sure there’s no a Engine problem. If that’s ok Test injectors next and if all of that is good check timing.
oh, thanks for the reply, I bought a noid light tester, surely cylinder 3 was not getting any pulse, then I though it was an electrical problem, I inspected all the wires, they were perfectly fine, I did a continuity test and something odd happened, the test I did was with everything off, I did the test on power for the fuel injectors and all 4 were good they got a continuity, ( I did the test by touching power cable from fuel injector, and ground or power on battery) I did the same to the 4 cables that connect the computer to the fuel injector, 3 of them had no continuity which is normal since everything is off, but the one from cylinder 3 had a continuity same as with power cable, so I though it must be touching a power cable, I did single cable continuity test from bad cylinder 3 cable, traced all the way back to the computer brown cable with gray dots where it connects to the computer , continuity was good, so I removed the cables from the computer and did the first test with the computer cable to battery (same like I did with power cables to battery), and the continuity was gone, it looks like inside the computer somehow there is a short or just the cylinder 3 connection is touching power, I opened the computer and everything looks perfectly fine almost like new, but this is beyond my knowledge I can't deal with tiny parts on the computer, I'm not sure if I should bring the computer or the whole car with computer to the dealer for a test, or just buy a computer from ebay and switch it to see if the problem will be gone. I can't go beyond this right now, I don't know what else could be.
I had the same thing happen to me a while back, and it turned out it was a bad Fuel Inj#3 - I had it replaced and it fixed the problem. One of the most expensive problems on most older Toys is that the Fuel Injectors go pretty quickly. If one is at its end, be sure you can bet the rest will eventually follow. Best advice is when they have the shell cracked you should change them all at that time and possibly have them do the Gasket Seals also it'll save some money. Then you should be good for another 100k or so. My first failure is when my truck hit 218k Fuel Inj #5, At 249K Fuel Inj #3 went, then at 267K Fuel Inj #2 went and at that point I had Fuel Inj #1, 4, and 6 Replaced as well as my Valve cover gasket seals cuz they were leaking a little bit.
Hi i have the same problem 2006 corolla p0351 already replaced all the coils. same code. but I dont get any change when I remove either the coil connector or the fuel connector. I think its a wiring problem.
I bought a computer on ebay for 50.00 didn't help same problem
I have a p1310 code that stays in the same #3 cylinder even if swapping the coils. How would I change to wireing to the ignition coil? Or do you have to replace the whole wiring harness
Leticia Lugo I’m not sure why you need to swap the wiring or what you mean by that? If you swapped the coil with out unplugging it then it would misfire on two cylinders.
@@HowtoAutomotive i did the trick where you switch the ignition coils to see if that would be the cause of the code and that when you swap the coil the code would change from p1310 to like p1315 but mine has remained a p1310.
The ignition coils are plugged in correctly as well
@@llugo9399 Then you have to take a good look at your wires going to that coil. Usually they harden over time due to heat and breaks. Also check if the pins inside the wire harness are pushed out or having carbon built up.
Can you give me toyots car circuit diagram.
The problem is theres no video how to change 2009 coil cables replacement
Best info I’ve found good video
Thank you!
You just made it easy
That's a good teaching.
I have a 2002 sequoia i replaced the spark plugs and ever since it seems like it want to turn off
Did you get the correct brand/type?
Denso or NGK
And are your coils properly plugged in and seated?
+How to Automotive
Should I worry if one of the bolts doesn't tie down the coils all the way since i probably stripped it? The bolts I am talking about is in time 1:05 of the video.
Calvin Mahk Most likely will not but there’s a possibility of the coil lifting up and that will cause a misfire. You may want to run a tap in it in or put a shorter bolt
ok Thanks for the fast reply!
If you suspect the coils (BTW coils will go tend to go bad around the 250,000 km mark and you have a 4 cylinder engine, just replace the coils. Most 4 pack coils for 4 cylinder engines are less that $100 and that way you are good for another 250,000 km. Inspect the coils when you have them out and if you see tiny hairline cracks in the coil's shaft end, that indicates the coils are getting old and on their way out. Anther indication is the car's engine will begin to hesitate upon light acceleration and sometimes possibly stall
Funnily enough it was the replacement Bosch coil that failed, coil was cracked and molten solder balls. Replaced with NGK.
Can u check the coil itself with a multi meter. Just bought 4 Bosch coils n still lugging n studdering
joe d If you tried the simple stuff and it still misfiring you may wanna look into a lab scope. Also don’t forget to check the basic stuff like compression timing.
joe d
If you have a Toyota, use Denso parts. These are OEM. Many Toyota models will not communicate with other aftermarket brands. I experienced this before. Also Denso is more reliable and is generally cheaper than Bosch.
Isnt suposed to be disconect each coil & the that makes the engine to shot down / stutter is the bad coil ?
No
You can check the signal from and to the computer with a multimeter that measures AC.
I doubt that
Yesssss!!!!!
Awesome very informative video
Shabi Bajwa thank you and thank you for watching!
Great video, my 2012 Prius has a cylinder 1 misfire. How can I tell which cylinder Is which. Your input will be greatly appreciated. Again, thank you.
Will Larrea on your Prius the cylinder closest to the drive belts it’s going to be cylinder number one. Then they go in order 2,3,4
@@HowtoAutomotive thank you so much for your prompt response
Will Larrea thank you for watching!
Nice
I thought you didn't need special tools.
I got power signal low ref and ground no spark on any plugs what could cause that 🤯🤪 it's a 08 DTS
Check for crank signal. The computer will not operate the coils without a crank sensor. Or the injectors
@@HowtoAutomotive yeah I got signal to coils when cranking 🤯 so that pretty much means I got cam and crank signal I have changed both of those
2:45
Why did you replace all 4 coils ?
Robbie Santos
But what makes a car misfire
Where did you buy the orange plug adopted
DENSO for life!!!!!
Just buy new ones and replace at $100, by the.vtime u buy s and ark tester, your 1/4 int cost.
The original equipment is Denso on a Toyota.
The average Joe does not have those high-tech scanner. So much for the average person lol
My wifes 1999 Lexus RX300 is getting a P0304 and I installing a new one still didn't resolve. My diagram shows the second wire from the 12v power as the 5v ecm signal wire which I get 5v with the key on. Even though this is showing 5v it doesn't further diagnose the lack of signal which for that I'd meed an oscilloscope. I know my wife loves her suv but a 390k I think its time. We;ve had it since 2008. Would still like to solve this issue though.
No scan tool.
they are at Northern Tool for about $35 new...
When I unplugged them , the car just shut off
Denso parts on a Toyota. NOT Bosch. Some ECU’s will not communicate with some brands. Toyotas are one of these
couldn't i just use a multi meter?
Yes and a lab scope. There’s multiple ways to go about it.
I mean of course he said bosch they sponsored it....
VW= Bosch. Toyota= Denso. There is a reason why factory parts are expensive.
Factory parts work the best.
I only have $1,000 computer to check if the coil is bad but I'm (low tech).
Didn’t show how to test it really
Of course it’s a Land cruiser 😂
My car doesn't start or turn over so your videos no good for me
sorry, but his explanation is too complicated for a normal person.
Sir my car Toyota corolla xli 2011 model have a problem' few minutes run engine then auto off engine. what is the problem sir how can I fix it?
Zulfi Shoro it could be a lot of things. I would start by pulling codes with a scan Tool
How to Automotive OK sir thanks for further detail thanks.