How an Airbag Sensor Works

Рет қаралды 637,289

speedkar99

Күн бұрын

Пікірлер: 428

@723lion 7 жыл бұрын

this is the best "how it works" video ive seen in KZfaq... 0 second wasted.

@speedkar99 7 жыл бұрын

+723lion thanks, short and to the point is how it should be

@OscarHanzely 7 жыл бұрын

totaly agree!

@fakecheloo3195 6 жыл бұрын

723lion yes

@rebaimourad1000 4 жыл бұрын

yes

@lizzybeats6015 3 жыл бұрын

u so right

@observersnt 2 жыл бұрын

brilliant, sensible, no nonsense, no background music, exactly what most others don't do, explain function of components so the unlearned are left with a name of a component but not necessarily how it works. brilliant video, clear speech, detailed, competent, excellent communication skills. Thank you very much

@speedkar99 2 жыл бұрын

Thanks. Short and to the point is my style

@hraghavendra5100 2 жыл бұрын

Yours is a gold standard 'how it works ' video. Zero time wasted. Please continue your good work so that we can all benefit from it.

@Wildcat5181 8 жыл бұрын

A very good explanation of the theory of operation, followed a detailed illustrative visual component. Good job.

@speedkar99 8 жыл бұрын

+George Rivera Thank you

@Mart25F 7 жыл бұрын

speedkar99 I bought a car from an auction with the driver and passenger airbag deployed. Do I just replace the airbags and reset the module?

@Wildcat5181 7 жыл бұрын

Mart25F Nope. You have to replace all the crash sensors, SRS computer, aka SRS deployment module all the air bags and the initiator module.

@samsical2597 8 жыл бұрын

You're awesome for how concise and direct this video is. You're also awesome for sacrificing a component for everyone's education, and for editing the video down so there's no dead air :) You're awesome.

@speedkar99 8 жыл бұрын

+samsical Thank you. Your learning is my learning too. I always wanted to know myself how an airbag sensor works and I didn't see any documentation out there so I made this video to share with all.

@ladedk 9 жыл бұрын

Huh.... Way simpler than i would have thought.

@speedkar99 9 жыл бұрын

Yes very simple, though there are more complex airbag sensors in newer cars.

@theshadetreewelder3523 6 жыл бұрын

Varies between vehicle

@chupamishuevos303 6 жыл бұрын

Also the computer has to see many other signals before deploying bag like seat position, speed vehicle is traveling

@mabakay 3 жыл бұрын

And it cost only 90$

@lmao12391 8 жыл бұрын

Awesome explanation. Gave multiple diagrams of sensor variants along with not wasting time showing you spending 5 minutes to pry off glue. Please keep making videos, people need to look at yours as a standard! :)

@speedkar99 8 жыл бұрын

+Daniel Faraj Thanks. Short and to the point is my style. I hate wasting time on trivial things like screws, the point of the video is to show how something works, not how to unscrew or pry something lol

@williamscott6291 5 ай бұрын

Very nice! You were to the point and showed how these sensors work using a diagram then actually taking one apart. Good teaching, and thank you.

@speedkar99 4 ай бұрын

You're welcome!

@barryll3855 6 жыл бұрын

100% excellent, this is the gold standard for how these videos should be! Thanks!!

@speedkar99 6 жыл бұрын

Exactly, short and to the point.

@geoffwhite1350 5 жыл бұрын

If anyone wondering that's a 1M Ohm resister

@AdrianSanchez-uh8ci 5 ай бұрын

do you happen to know, if i could use a resistor insted of an impact sensor? Thanks fam :D

@matthall6258 2 жыл бұрын

Thank you for this concise explanation of how sensors work without extraneous musik or waffle about how to use a spanner or select a screwdriver. Full marks!

@speedkar99 2 жыл бұрын

Thanks. Quick and to the point is my style

@jessecrips-sorger9423 8 жыл бұрын

Great job on the explanation, Speedkar, you're concise and the video production was excellent. Found your video while trouble shooting my '03 Silverado, and learned way more than I could have hoped. Thanks!

@speedkar99 8 жыл бұрын

+Jesse Crips-Sorger Glad you learned from it. Thanks for the feedback.

@LarryCook1960 6 жыл бұрын

I'm having an issue with the airbag/sensors on a 2006 GMC pickup, so I checked the sensors with an ohmmeter and diode checker. The resistance was very high one way (3 megohms), and infinite with the leads reversed. Measuring voltage drop, which is what a diode check does, shows there is definitely a semiconductor between the two leads of the sensor, so unfortunately not all sensors are as simple as yours. Very nice video. Well done!

@speedkar99 6 жыл бұрын

That's true, a diode could also be used as a check device as well

@LarryCook1960 6 жыл бұрын

Well, no. What I mean is that the airbag sensors on my vehicle, and most likely other newer vehicles, consist of more than a simple mechanical switch. Inside mine there is clearly at least one transistor / diode of some type. Your smart phone has a micro accelerometer in it for instance, which is most likely what's inside a more modern sensor. hackaday.com/2012/05/22/the-engineer-guy-explains-how-mems-accelerometer-chips-work/

@jositosWay Жыл бұрын

@@LarryCook1960 You are right : sensors are more complicated than that.I think you have figured it out by now ; The micro accelerometer you are talking about is more likely based on piezoelectric technology that says: a crystal (be it quartz or the like) has the quality of producing electric pulse upon being impacted. So the accelerometer has a crystal quartz layer that separates two metal plates that are charged with positive and negative electrodes respectively by the crystal upon being impacted or very lightly knocked. So I think that when people measures the resistance of an airbag sensor with a multimeter , what they are measuring is the resistance of mentioned metal plates. If the piezolectric crystal that is between those metal plates , breaks for a strong external blow to the car or by simple tear-and-wear, those two metal plates would be in contact (even lightly due a tiny minor fracture of the crystal) showing an abnormal resistance or even continuity. It is even more complicated if we take into account that around the piezoelectric accelerometer there are capacitors that store some charge and a tiny transducer that converts the electric pulse generated by the cristal (upon being tested or for a legit real impact) back to the Airbag control unit (ECU) to deploy airbags if needed. That amounts to a nightmare for a newbie to test such an overcomplicated sensor device that only gets a generic message when conecting a ODBII examiner: OPEN CIRCUIT IN AIRBAG SENSOR 1 !!!! Then you start throwing parts, battery and overhauling the fucking all wire looms and connectors to the ofending fucking sensor 1. A nightmare and very entertaining PITA process!!! Good luck!!!

@paulschneeman1476 10 ай бұрын

Well you have to remember, intellectual properties are protected by Patents. Either the manufacturer settles on using someone else's patented technology or, develops their own device which then has to undergo all the testing to certify the device. So....bottom line is I'm sure there are a dozen or more different designs, seems like people are more interested in just shooting the messenger, rather than taking the explanation for what it is worth. Like I tell my kids don't be one of the ten percent.

@filstoy 5 жыл бұрын

I wish I had found this video yesterday. I had the "Service Air Bag" message on my 2009 Silverado 1500. Wife needed the truck to go out of town so I didn't want her driving it without the air bag. I suspected the problem was one of the impact sensors on the Rad support but wanted to verify it before spending $100 on a new one. My Actron CP9690 scanner would not read the code even though it was advertised as doing SRS which is why I originally bought this model just in case I ever had a problem. I took it to O'Reilleys and guess what--- they couldn't read it either because they were using the Bosch version (Bosch owns Actron now) of the SAME SCANNER. I just bit the bullet and bought an impact sensor there and luckily that was the problem. After watching your video I realized all I really needed to verify it was a friggin' 1/4 watt resistor which I have drawers full of. DOH !!! Great video. Thanks.

@speedkar99 5 жыл бұрын

Glad it helped

@tamilmaranc 8 жыл бұрын

very clear explanation for accecalaration of sensors and activity

@speedkar99 8 жыл бұрын

+Tamilmaran C thanks

@andreytimokhin936 3 жыл бұрын

Straight to the point, crystal clear explanation. Thank you!

@mattkeefe3850 7 жыл бұрын

Thank you for that simple presentation that explained the concept of an impact sensor that I could easily understand.

@speedkar99 7 жыл бұрын

+Matt Keefe thanks I'm glad you understood

@speedkar99 7 жыл бұрын

+Matt Keefe thanks I'm glad you understood

@speedkar99 7 жыл бұрын

+Matt Keefe thanks I'm glad you understood..

@laius6047 5 жыл бұрын

That's a highest grade tutorial on the market.

@speedkar99 5 жыл бұрын

Thanks for the compliment

@Evans0405 4 жыл бұрын

Best succinct to the point video on how airbags work!

@speedkar99 4 жыл бұрын

Thanks. I'm gonna make a full airbag video soon

@007Kellam 8 жыл бұрын

Great video! Also, the airbag computer does nothing until usually 2 or 3 sensors are tripped, so if one fails it doesnt deploy your airbags and cause an accident, this is why some airbag lights will be on for seemingly no reason, because one sensor is tripped (or not functioning at all) but none of the others are

@speedkar99 8 жыл бұрын

+007K Yes, correct. It also has to do with vehicle speed and yaw.

@wysiwyg2489 8 жыл бұрын

The airbag light is on for about 6 seconds because the system does an internal check at start-up. If the airbag light is on all the time, there is something wrong in the restrain system, airbag, sensor, etc. You need to pull the fault codes from the ECU to know what is not working properly.

@speedkar99 8 жыл бұрын

+wysiwyg248 Yes that's exactly how it works.

@JodBronson 6 жыл бұрын

+speedkar99 - I agree with " Speed & Yaw ". There are many times I have hit the Front Bumper and the Air Bags NEVER deployed!

@dljones61 4 жыл бұрын

I've spent the better part of the day looking for how to reset an airbag code on my 2005 Camry after replacing the spiral cable assembly on the steering column and had no luck. Stumbled on this video and learned something I hadn't even thought about. This has made my day. Thanks and looks like I'll need a code reader of more value to reset that code.

@brettb8884 2 жыл бұрын

Really like your videos that get down to the meat of how an item works. Not superficial like so many other videos.

@dvikharev 6 жыл бұрын

Спасибо. Давно интересовала эта тема. Очень интересный рассказ с теорией и наглядной демонстрацией устройства датчика.

@exoexokexom 8 жыл бұрын

You have explained so well!! I get it now!!!

@speedkar99 8 жыл бұрын

+Angelina Chow Thanks

@N-trepid1 7 жыл бұрын

Excellent explanation. Just what I needed to know re: the Airbag Senor configuration. Thanks!

@speedkar99 7 жыл бұрын

+James Hall thanks

@stephendee7839 8 жыл бұрын

Well illustrated. Clearly described. Generally pretty well lit (could use better lighting when prying out the cam). Excellent editing! Really well done.

@speedkar99 8 жыл бұрын

+Stephen Dee Thank you for the constructive comment! Lighting wasn't that great (filmed in basement, took many takes to get a decent shot of that cam gear).

@juanaranda9265 8 жыл бұрын

NICE EDITING!! Most people make u watch unnecessary long videos that make u just skip the video to a more INTERESTING SHOW THX FOR UPLOADING!!

@speedkar99 8 жыл бұрын

+juan aranda Thanks, I like making videos short and to the point so it's not boring to watch and you get the information you want right away.

@elgroso806 6 жыл бұрын

Thanks for the video. Be careful when using a cutter. You got me scared ! Lol

@speedkar99 6 жыл бұрын

Yea safety first!

@paulschneeman1476 10 ай бұрын

Reminded me of when I first sliced my finger open when I was ten using a razor blade.

@shiladityaray3137 7 жыл бұрын

You Sir gave a perfect explanation of the whole thing..... Thank you very much......

@speedkar99 7 жыл бұрын

+Shiladitya Ray I'm glad you enjoyed it and learned something!

@mugadelic 5 жыл бұрын

Great explanation... simplified diagrams are super helpful.

@speedkar99 5 жыл бұрын

I'm glad it helped you understand and learn something new 😉

@moustafazahra1094 5 жыл бұрын

This presentation is the perfect illustration for the famous Arabic proverb (Brevity is clarity)

@melvincollins743 7 жыл бұрын

clear and concise, much appreciated but please use caution with that knife

@speedkar99 7 жыл бұрын

+Melvin Collins agreed. Thanks

@el-shesma3733 2 жыл бұрын

1:48 How will rust affect the interior parts due to rust if they are sealed, as you indicated later in the video

@nda55 8 жыл бұрын

Superb , thanks for the video

@speedkar99 8 жыл бұрын

Thanks

@ShelDockToyotaVitz 2 жыл бұрын

Excellent video.

@speedkar99 2 жыл бұрын

Thanks

@isaacperez834 4 жыл бұрын

I’ve been looking for this explanation for a long time.

@speedkar99 4 жыл бұрын

Thanks. A MEMS device is how they do it in New cars

@thankswezilow6794 2 жыл бұрын

I remember a time in school where anything outside of the classes I missed out on; Airconditioning and airbags systems were left out; heck I was not allowed to take Diesel classes until the last minute; I refused

@omkarnikam1143 4 жыл бұрын

Thank you sir you explained it very smoothly...

@speedkar99 4 жыл бұрын

You are welcome

@tigerseye73 6 жыл бұрын

Thank you for a good explanation of how these things work.

@jatco84 Жыл бұрын

Great information... Now if I could find the right front passenger side sensor on my 1995 MX6...I can start to find a replacement. Been lloking. Thanks for your vid...!!

@ff5gus 9 жыл бұрын

Awesome I never understood how it worked.

@osamajassim5204 3 жыл бұрын

Very interesting video ,thank you very much.

@speedkar99 3 жыл бұрын

You are welcome

@rebaimourad1000 4 жыл бұрын

A great explanation. Thank you.

@lankaat 6 жыл бұрын

Excellent presentation!! Thanks

@speedkar99 6 жыл бұрын

Your welcome

@ronbrown6208 7 жыл бұрын

Interesting. Thanks for the explanation

@speedkar99 7 жыл бұрын

+Ron Brown thanks

@eddysun518 7 жыл бұрын

I learnt a lot from your video, thank you!

@speedkar99 7 жыл бұрын

+eddysun518 glad you enjoyed it thanks

@DJ-tn7vj 7 жыл бұрын

Very well explained.

@speedkar99 7 жыл бұрын

+Daniel James Glad you found it helpful

@jeevajp2574 6 жыл бұрын

I really liked the way you explained!

@speedkar99 6 жыл бұрын

Thanks, short and simple is my style

@Caspercat1914 6 жыл бұрын

missed your thumb at 2.12

@lucienworrell467 6 жыл бұрын

Great video, very well explained and helpful

@speedkar99 6 жыл бұрын

Thanks

@Woodscraps-lr5vz 6 жыл бұрын

Nice explanation.

@Tony-112 6 жыл бұрын

best video ever im glad i found your channel

@speedkar99 6 жыл бұрын

Thanks , please share on your network

@JodBronson 6 жыл бұрын

GREAT JOB on the Video as ALWAYS !!! A+++++++++++++++++++++++++

@speedkar99 6 жыл бұрын

+Jordan Bronson thanks

@horndog912 9 ай бұрын

This may be true for your particular sensor/ system but is by no means the way they work. That is an inertia type sensor used in early systems. Ever seen airbags deploy when a vehicle is hit but sitting still? Park or drive doesn’t matter, there is no deceleration there. They utilize a potentiometer that measures strike force- impact and signal the control module to deploy the charges in the bags when enough force is detected. Pendulums in the main sensor where the first deployment methods. Now, with a vehicle running you can blow the airbags by impacting the area the area around the sensor or the sensor itself. 40 years here building wrecked cars.

@8788luigi 6 жыл бұрын

I wonder how many OHMs is the diagnostic resistor?

@maheshgo 4 жыл бұрын

Nice Job

@semdelijster4459 5 жыл бұрын

i've always wondered how this worked, now i know!! very well explained thanks

@speedkar99 5 жыл бұрын

You are welcome!

@abbisalmi1948 2 жыл бұрын

Thank you. Very useful.

@scottsaint2122 Жыл бұрын

Super cool man, thank you!!

@speedkar99 Жыл бұрын

No problem!

@johneric3886 Жыл бұрын

Excellent excellent stellar work!!!!!

@wysiwyg2489 8 жыл бұрын

You should add that normally, three frontal sensors are used to send signals to the ECU that triggers the airbags. This type of mechanical sensor is no longer used for automotive applications, now they are all electronically based with some exceptions (venturi tubes in side impact). The ECU generally has one this mechanical sensors inside, to act as a backup system.

@speedkar99 8 жыл бұрын

+wysiwyg248 Yes I agree. Of course this sensor was from the 90s when things were simple and basic. Now they use accelerometers and MEMS devices to sense impact. My cars ony have 2 frontal sensors though.

@wysiwyg2489 8 жыл бұрын

Too bad your vehicles has just two sensors, three is a much safer option. Not just from the durability viewpoint, but also with three, the ECU can make more accurate decisions relative to must fire or not fire conditions.

@seshachary5580 Жыл бұрын

awesome education. more videos please. Thank you regards

@likhith-lexus 7 жыл бұрын

awesome explanation. thank you very much for sharing

@speedkar99 7 жыл бұрын

Glad you found it informative!

@47292801 6 жыл бұрын

Well explained. Thank you.

@speedkar99 6 жыл бұрын

+Smoked Chicken Drum your welcome

@cloviscareca 8 жыл бұрын

Great video plus demonstration. But how to be so sure about the precision of this mechanism? I mean, how will it deploy only in a collision, and not in a hard braking? The borderline between a collision and a crash seems so tight...

@speedkar99 8 жыл бұрын

+Matheus Bitencourt Hard braking can never have the severe deceleration forces that are experienced in a collision. Deployment is also a function of vehicle speed and other dynamics, such as steering angle, yaw, and possibly readings from the ABS sensors.

@Mike-xt2ot 4 жыл бұрын

You are very talented. Fellow master tech.

@jayfix6126 8 жыл бұрын

Nice vid mate. Explained very well

@speedkar99 8 жыл бұрын

+Russel Cristovall Thanks

@speedkar99 8 жыл бұрын

+Russel Cristovall Thanks

@didyouknow138 4 жыл бұрын

HI this the best explanation in youtube. Just asking how to check the resistance between the two terminal of the side impact sensor. I mean if the sensor is bad what reading should I see , Thanks

@speedkar99 4 жыл бұрын

What ever resistance is the color band of the resistor ...each sensor is different

@alexugarte2689 5 жыл бұрын

what's the ohm resistance of a good sensor?

@speedkar99 5 жыл бұрын

I don't recall but you can grab it off those resistor color bands

@MSaqib-bm6np 2 жыл бұрын

Best explanation

@FilterYT 6 жыл бұрын

Thanks, another great video.

@speedkar99 6 жыл бұрын

Your welcome, thanks for your kind feedback

@billsullivan8812 Жыл бұрын

@speedkar99 - great explanation, Thank You. My 2007 Ford Ranger intermittently throws a B1118-A0 Passenger Front Impact Sensor Mount/ Communication Error. There is a resistor in the sensor. I am thinking it gets out of operating resistance range after system powered up and sets the code. I am going to replace sensor first before chasing wiring problems. Thank You once again.

@CHIBA280CRV 8 жыл бұрын

Excellent tutorial ..thanks

@speedkar99 8 жыл бұрын

+JOGO

@DreamGaming12 6 жыл бұрын

Straight to the point

@binthrdonthat 8 жыл бұрын

Great video, thank you!

@speedkar99 8 жыл бұрын

+binthrdonthat Thanks

@nalvarez3505 5 жыл бұрын

Good video nice to know how things work thanks

@speedkar99 5 жыл бұрын

You are welcome

@ramazans8114 5 жыл бұрын

Great work

@speedkar99 5 жыл бұрын

Awesome thanks

@Serhat_Kacar 9 ай бұрын

Very satisfied video

@rohitgope2622 5 жыл бұрын

Great video thanks a lot

@mohammedfoaadasd2975 6 жыл бұрын

Thanks for the video . good job

@speedkar99 6 жыл бұрын

+mohammed foaad Asd your welcome

@Mogy336 8 жыл бұрын

Thanks for sharing

@praveenchaubey7018 7 жыл бұрын

well explained , thanks a lot

@speedkar99 7 жыл бұрын

+Praveen Chaubey thanks

@chan89my20 6 жыл бұрын

thanks.. great explanation

@speedkar99 6 жыл бұрын

Your welcome

@42luke93 6 жыл бұрын

Looks like a simple design, besides designing that computer and chip.

@ironhorse3497 3 жыл бұрын

Thats interesting. Good no BS video. Thanks !

@Chawaonga Ай бұрын

Awesome video. I was trying to make out the resistance. Is it a black brow brow ring? Anyway you can check and let us know 😊

@videoworks7731 6 жыл бұрын

nice job

@speedkar99 6 жыл бұрын

Thanks

@hafo821 5 жыл бұрын

great video, thanks!

@speedkar99 5 жыл бұрын

You are welcome

@owensrayfeilds6800 5 жыл бұрын

nice,,,talker,,no bullshit,,stories about your life....nice,,wish you be in every video of youtube...

@speedkar99 5 жыл бұрын

Thanks No BS is my style

@sanjapkoki 5 жыл бұрын

Would slamming on the brakes really hard and suddenly not also trigger the airbag? That ball will leave the magnet if I slam on the brakes abruptly.

@speedkar99 5 жыл бұрын

Slamming the brakes is nothing compared to the force of a crash

@trishanuray3833 5 жыл бұрын

Also do Turn Signal Flasher.

@speedkar99 5 жыл бұрын

Good idea bud!

@dans_Learning_Curve 9 жыл бұрын

Great video! I never thought of taking one apart. I'll have to do that. A couple of thoughts. Bolt sizes are determined by the size of thread not the size of tool used on them. Bolts have the threads on the outside, nuts have the threads on the inside.

@speedkar99 9 жыл бұрын

Dan'sMeTube Thanks for the feedback!

@sameekshyaray5951 8 жыл бұрын

thanks.... it is a very informative video

@speedkar99 8 жыл бұрын

+Sameekshya Ray Thank you

@skliros9235 7 жыл бұрын

great video!

@speedkar99 7 жыл бұрын

+skliros Thanks !

@mukundthorat5672 6 жыл бұрын

I cringed a little when speedkar ran a blade on the plastic housing with his finger underneath and it slipped a little

@nwasogwauchechik.781 3 жыл бұрын

My Lexus IS 200 have experienced an airbag deployment twice in one week without me getting involved in a crash or hard impact and the indicator on the dashboard wouldn't go off. What is the problem? Help with advice please

@handymanhelper6093 7 жыл бұрын

would this help in a situation where a truck was in a collision but the bags didn't go off, maybe just the sensor went bad? or would their be hard set codes on the computer still making the light still apear?

@nononsenseBennett 6 жыл бұрын

Interesting. Thanks for that!

@speedkar99 6 жыл бұрын

+bennett guinn your welcome

@ATXTube 6 жыл бұрын

Excellent

@tazzertime 8 жыл бұрын

Very well done and easy to follow. You have a real talent to guide and explain in your presentation. You would do well as an teacher or instructor. Our 2012 Mazda recently was in a front damage collision with much damage and no air bag deployed. No injuries, but isn't this odd?

@speedkar99 8 жыл бұрын

+electricsub Thank you for the feedback. I love what I do, presenting concepts in a clear and concise manner. I'm learning as much as you are as I go along. The airbag is not designed to deploy in a low speed collision, as it could cause more injury to passengers. Rather the crumple zones of the vehicle is meant to absorb the impact. Being able to walk away from such a collision is attest to that.

@wyheee 8 жыл бұрын

Same here...i had an accident with my Camry 2012 & it wasn't massive damage, just crashed the shield of front light, bend little corner of the hood, the corner side of font viechle & scratched some of the paint. The Airbags didn't deployed