Ground Side Switched, Duty Cycle Controlled, O2 Heater Circuit Testing [an SD Premium Class]
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- čas přidán 2. 08. 2024
- The car that is in my classroom is a 2007 Nissan Sentra with a Wideband O2 Heater Circuit fault (P1148, P0031) Sign up here to join! www.scannerdanner.com/join-sc... There is a 14 day free trial
00:00 - introduction (ground side switch, duty cycle controlled output circuit testing)
01:32 - trouble codes and scan data parameters P1148 and P0031
03:20 - chapter 4 page 6 from my book (O2 sensor side colors)
06:35 - chapter 5 page 19 from my book (O2 heater circuit operation and testing)
09:00 - heater circuit data PIDs
11:30 - discussion of duty cycle, frequency and pulse width
21:28 - is pulse width the same as duty cycle?
23:50 - Ford Taurus injector drop outs link • Ford Taurus Cam Synchr...
27:30 - heater circuit on start up (scan data)
29:15 - view of the O2 wires and where to connect the amp probe
33:10 - no current flow found on the O2 heater (possible causes)
36:30 - wiring diagram of the wideband O2
39:40 - ground side switched circuit with no current flow, possible causes
42:50 - voltage testing of the heater circuit begins
49:36 - open in the heater circuit is identified
50:17 - verifying the control circuit integrity and computer driver operation with a test light
1:00:39 - new O2 installed, scope and scan tool waveforms
1:05:30 - resistance testing the heater circuit
ScannerDanner Tools:
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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC. - Auta a dopravní prostředky
Ten years . I've been watching Scanner Danner. He's a great instructor and Tech. I'm Disabled now can't do much mechanical work. His book and website is a must for all techs in the automotive field !!!!
Thank you so much! Really appreciate you being with me for this long and for your SD Premium membership. It is you guys that help me to continue to produce content on both my website and here on YT.
@@ScannerDanner. Your awesome man. I watch your videos all day. I wish I could still do the mechanical work. I can still do the electrical it just takes longer. Fell into hard times. Sold my automotive diagnostic equipment. Thanks for sharing your videos.
@@donniejohnson7499 I can hook you up with SD Premium access while you get back on your feet? Email me at support@scannerdanner.com and I'll make it happen for you.
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Hello Paul, I am writing to you from Peru, my name is Frank. First of all I want to thank you for the great content that you upload to CZcams, I have been following your channel for a long time, I have learned a lot and I continue to do so. Now, I recently bought your book Engine Performance, and it's amazing the ease with which diagnostics can be done, it's great. As it is a book that I will read several times, I decided to translate it into Spanish to make it easier for me to reread it. I know it will help many Spanish-speaking technicians. I hope it doesn't cause you any discomfort, I only have this translation and if you want I can send it to you. I don't ask for anything in return, after all I can't complain with all that information you keep giving away. THANK YOU 🇵🇪
I have a Spanish version already done! Thank you so much! I just need to get it produced. Really appreciate your offer my friend.
@@ScannerDanner thanks once again 👍🏽
@@ScannerDanner did Cuba finally finish the Spanish translation? It will take a bit of time to translate. Good work from this guy as well.
@@scientist100 @SuperMarioDiagnostic did it for me as Cuba had her hands full. Thanks!
@@ScannerDanner I thought Mario didn't speak Spanish or write it for that matter. I know Google is pretty good with it and little correction is needed as far as the emphasis that some sentences have but it is pretty spot on for about 95%
What an honor to have this class on this channel, can't Thank you enough SD😍
Love you Guy's, Stay Blessed Danner Family❤
I've been working on my cars for 20 plus years. And opened my own shop almost 4 years ago. After retiring from pipe welding. Every video I watch of yours I learn something new. Thank you for sharing this knowledge.
That is awesome!. Thank you
What I'm saying is people like me that are in the trenches working every day on these cars are looking for more training better training and I think you have the answer. Thank you for all you have done for our industry @ScannerDanner
Great diagnostic process without a flow chart. The process stays the same regardless of the vehicle manufacturer. Another great learning process. Your students should be grateful to have you sharing this valuable data.
Thank you!
You have helped thousands of people! Great teacher my friend! Thank you
Happy to help! Thanks so much
I think you are the best instructor; you know today I have a different perspective in this my career.
Thank you!
Thank you for taking the time to make these educational videos they make me be better at my job
Good bless you and have a great rest of your day
You are very welcome
Currently learning this exact topic in auto class 😮 perfect timing
Spend some time here czcams.com/play/PLE9BA8CBD51B8C48E.html
You'll be light years ahead of your class. I also have classes I offer on my website if you're interested
www.scannerdanner.com/join-scannerdanner-premium.html
Super THOROUGH lesson !! Excellent teaching techniques !!! Thank you mate ! 👊🏼
Glad it was helpful!
Another great video Paul as always. Your helping ALOT of people in and out of the Automotive repair Industry.Keep up the Great work Paul GOD Bless.
My Mentor Sir ScannerDanner
Thank you for sharing what you know with us, take care and have a great weekend with all your family around you
ACCOMPLISHED Sir ScannerDanner
From Nick Ayivor from London England UK 🇬🇧 Good evenings ⏰️ 19.44pm
A Most Sincere Thank You!
Thanks Paul for share another master class
Thanks so much. I have been following all your videos.
Now, I got the idea of making all windows auto up as soon as car is locked in my i20 2011.
Nice Job!
You are the best.
Logged in for class sir
I'm buying your book. Because I've read reviews and I've listened to people on CZcams talk about how your book changed their career as a technician. Also because training I'm in from this manufacturer is not near as good as your content here.
Hey Dan, love your videos. I'm learning so much. Just wanted to say thanks. Anyhow, was just wondering if you ever did any type of virtual diagnostic? Have a problem think you might be able to walk me through. Was wondering if you might be interested?
I did try that test using a test lamp in place of the heater circuit to "trick" the ecm liked we chatted about while back and it didnt work. even though the current flow (amount) was the same as the A/F sensor heater. It would pwm the test lamp for exactly 10.6 seconds and then shut it off. Was interesting to see intentional shutdown though. You may not remember that, it was at leasr 6 months ago.
Were you using an LED test light? That would cause the PCM to shut it down as a bad sensor because an LED is a diode. It will reach about ..6V and turn on and there would be no resistance. So it would just be off then on. Zero resistance to infinite resistance OL. An O2 sensor will go from zero to say 100 ohms and the PCM will read that as a valid range. Zero to OL is not a valid range.
nice
🤯 so much too learn 🙇🏼♂️
I can teach you!
@@ScannerDanner Iam getting your book end of month. Spent my budget wife allowance. So then will do your premium channel 👍🏻
@@sheerwillsurvival2064 you don't need to book to start, sign up for the 14 day free trial and at the end of 14 days you'll be charged a recurring $11/month until you cancel. It's worth the free trial and even $11 to see if you even want to spend the money on the book. I'd prefer it actually.
I'm teaching page for page from it, so you'll be able to see what is there too.
Thank you again!
@@ScannerDanner 👍🏻
Scanner danner I love your channel love your content. I have been working as a dealership automotive technician for 2 years. I would love to know what made you decide to write your book? I've noticed there is a lot of after market and even manufacturer training available. I've noticed you take a very different approach here in diagnostics.
It's a long story on where this all started, but I have it recorded in a few classes for sure. Really appreciate your comments man. I have exactly what a guy like you needs and I'm looking forward to hearing more from you along the way. My suggestion is to sign up for the 14 day free trial I have on my website (ScannerDanner Premium) before committing to anything. On SD Premium, I'm teaching through my book, so you'll get to see what's in it and what my classes are all about. Just be sure you cancel before the 14 days are up, so you're not charged the $11 for the next month.
www.scannerdanner.com/join-scannerdanner-premium.html
Thanks for the video
On 40:39 min you said if there's no power on both sides then you have a blown fuse.
But I guess you will not get zero voltage on blown fuse but you will get bais voltage.
only on some circuits my friend, not all! Great question
@@ScannerDanner
Thanks for the reply
Actually I spent the last 14 days 😆 watching your videos , I learned that from you.
Another question came up through my mine if some circuits doesn't have bias voltage then how it detect circuit problems.
@@braq331 in this case, it is a ground side switched circuit, so the ECM expects to see 12v on the control wire with the transistor off and 0v with the transistor on. So then logics are involved there. If it sees 0v with the circuit off, you will get a code. If it sees 12v with the circuit on, you will get a code. Make sense?
Thanks alot you're the best
Thank you very much for this video it was really educational, but I have a question does a 2007 frontier have a bias voltage to the 02 sensor if you can answer my question that would help me out a lot thank you very much and god bless you
Answered this on another video. I see all of then. Thanks!
👍👍👍👍👍👍👍
can you explain down stream 3 sensors? I see them go bad on land rovers often. they take a long time to heat up and show activity on scan data, and I have never seen any current on a heater circuit for these sensors. What do they do? I like your content. Thank you for sharing.
When a system has a bank 1 sensor 3 O2, it's soul purpose in life is to monitor the cat. Often times the heaters on these are delayed in turning on to allow moisture to burn off first
@@ScannerDanner Sorry sir your bank 1 sensor 8 went bad. the wire that drags it a mile behind you muffler broke.
Hello and thank you for what you do. Enjoy your show.
Hopefully youll have time to advise me. For a 93 f150 xlt 4x4 5.8L EOD4 or any older vehicle... Will newer platinum or iridium plugs mess with sensors or ECM? Ive been told that i should stick w stock plugs? Since truck is 30 years old, im looking for better mileage and low end torque. Since they are so old i am considering replacing coil, distributor and ignition control module as a matched set. Think i saw that some aftermarket icms screw w ECM? Want to buy matched set but would appreciate your input. Eventually will put a cam in. Not a racer. Want easier starts and smoother idle. Thank you in advance for your time.
You will get zero increase in performance by changing any of that. Unless you're having an issue now?
Stay with factory plugs and don't change all those parts! Especially the ignition module and distributor! They're making cheap/junk electronic parts for these systems! Watch this part 2 video on an EECIV Mustang where it took us 4 different "new" ignition modules before we got a good one!
czcams.com/video/9OR2yaV-3VM/video.html
Check and set your base ignition timing and maybe advance it a few degrees to see what that does for you. Just make sure at part throttle, pulling a hill, that you don't hear any pre-ignition (pinging) after advancing the timing. That's about the only thing you can do.
@@ScannerDanner thanks again. Will watch.
Also since it is so old my plan is to make it a sound heirloom to pass on to my son. And of course I don't want to be a parts changer. 😬😉
@alfredocasas7799 stay with the factory stuff. I promise you, you will get ZERO gains on aftermarket ignition systems no matter what they claim. The reason they can get away with these false claims is that when an engine is heavily modified and then needs a hotter spark, that's where the gains come in! A factory engine gets NO gains from a "hotter spark"
Hi master
I have Lexus
After 40 seconds heater circuit closed by ecm and when deleting error code and restarting the engine doing same thing
So is this command available in other cars and you advice me to purchase AF sensor
And typically when does the heater circuit come on? I know cold start. Does it ever come on while driving down the road?
Upstream O2 sensors, immediately! Downstream O2 sensors will often delay heater circuit operation until moisture burns off in the exhaust
Hi master wich other brands of scantools show us HTR % or Amps
That is specific to the car not the scan tool. They are not all controlled or monitored the same way.
Hey Paul I bought a 2006 Honda Accord 2.4 what would you charge to diagnose it? I think your in pa or near pa
what is wrong with it?
56:04 🤣🤣🤣
I remember this one I will brush up I been following as chiefeaglebear for 9 years... I will be in PA soon!!!!! scanner
Chief! I know you :-)
Toyota Tacoma 2003 4.7 with fault code p0031 heating circuit short to ground . I replaced the sensor but mil still on ,I tested positive wire it was ok then I tested control wire by test light once the engine started running the ECU connect the ground for 20 seconds then shutt off. What is the problem
Is it a ground side switched heater circuit? What is the O2 heater control wire voltage?
Yes ground side . really I did not measured heater control voltage. just I checked the ECU switched the ground side using test light . The test light illuminated a constant green for 20s not on off on off
@aliasas5715 not all heater controls are PWM, also an LED test light is not the best tool for this job. In your case the driver is recognizing that current flow is very low so it shuts the driver back off.
@@ScannerDanner so what that to be tested?
@@aliakas1402 do the same test, with an old style test light.
I thought milliseconds represented thousanths...so wouldn't 5 milliseconds be .005 where 750 milliseconds would be .750?
yes sir
Hello sir I am rubal from Bangladesh sir can you help me in trading please
Training? Of course
@@ScannerDanner cane your mobile no
@@MdRubel-gy8ms you want my phone number? No sorry, I don't offer that. You can sign up for my classes here
www.scannerdanner.com/join-scannerdanner-premium.html
I find this nauseating...how she smiles over the fackts...anyone with a knowledge of history...CAN see this is just bubld gum.
Who is "she" and what the heck are you talking about?