Airbag Light Cause & Fix B0104

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Airbag Light Cause & Fix B0104

[@Steve-pi1eg]

The fact that you took the time to open that sensor and show us the way things work makes this the best video I've seen on the topic. I like the science behind how things work. Thank you sir !

[@ratdude747]

That jelly is what us electrical engineers call "conformal coating". It's used to prevent moisture from damaging the circuit board. Pretty much every factory board in the vehicle (minus the radio and instrument cluster) is coated. However, some are "hard" coatings (like on the RABS computer in my Ranger). Those do not allow for any adjustment or repair after the fact. However, they make penetrable coatings like seen with this sensor; they're made so you can poke through it to make adjustments or the like. If I were to guess, this was probably chosen to allow for some sort of a sensitivity calibration.

[@briansmobile1]

+Larry Bolan You're smart. I love that about you Larry!

[@bradnimbus4836]

"It's full of shit!" Hahaha Brian thank you so much for pulling it apart. Fed my curiosity

[@briansmobile1]

+Brad Nimbus Welcome.

[@BigMac2222]

Really liking these dissection videos!

[@Srt8brian]

Do you have any vids on a chevy 6.0 oil pump replacement and symptoms?

[@WallaceRoseVincent]

The device probably has accelerometers. It probably has 2 inside one of the larger chips. It has 2 so the device can measure any sudden impact in an any direction the car normally travels in. Most cars travel in the forwards, backwards, left and right directions (yes, some travel up and down but that is likely not a condition of normal travel. There may be 3 accelerometers to cover up down. This could be used to deploy the airbags if the car fell off a cliff and the designer wanted the airbags to deploy when that happens. Thanks for video. Many accelerometers are made of a very small plate that deflects in the direction of motion.

[@seand4106]

noticing this is your newest tutorial yet maybe i can get a response from ya, i got a 1998 chevrolet k1500 with the 4l60e trans. i know there is videos on here on how to do a complete flush of the trans fluid from the radiator. but your tutorial are alot more in depth and i was wondering if you had a chance to create a tutorial and specify parts needed to do this project along with a filter change of the same trans. i would very very much appreciate it!

[@SteveRobReviews]

Well it seems them weather pac connectors are not so weather tight. Bonus with Spanky , doesn't get any better .... Cheers

[@TheDisgruntledMechanic]

I am glad this was not educational! I would have hated to learn something. Thanks Brian

[@MrTurdfergusen]

So, at 4:57 you see the failure point, the aluminum cylinder that the plastic is molded around for the attachment point has corroded and/or allowed water to get between it and the plastic and then froze and thus expanded the plastic and cracked it, which allows the water in. I think a preventative measure would be to squirt a big glob of silicone up into the threaded hole in radiator support first, then fill the hole in the sensor, coat the threads real good and put a big glob under the bolt head and the washer. Then both sides of the aluminum cylinder and the threads would be sealed and no water could get to it in the first place. Water and ice probably sit in the bottom of the rad support right over the hole that the sensor threads into and the water works its way down the bolt threads and sits in the cavity between the bolt and aluminum cylinder and then freezes and cracks the plastic housing, or the salty water just corrodes the aluminum and the corrosion does the expansion.

[@briansmobile1]

+MrTurdfergusen Great eye there! That's awesome.

[@mikec1096]

+MrTurdfergusen you sound like you know what you are talking about. however, have you considered that plastic cracked when he opened up the sensor? how could you rule out that crack was there before he opened up the plastic? I hate to cast doubt on your theory, but i can't say it's not possible

[@MrTurdfergusen]

Mike C If you watch closely you can see that the area around that aluminum cylinder that the mounting bolt goes through is bulged out and there is white crusty stuff falling out of the 2 large cracks around it, he never really put any pressure on that area. This type of corrosion induced bursting is very common with plastic parts that are exposed to the elements, its the same reason that causes corroded fasteners to become stuck together, the corrosion expands and locks the fasteners together, in this case it was only 1 metallic part surrounded by plastic, the plastic is weaker so it gave way to the expanding corrosion, breaching the seal of the housing. Brian never really jacked around with the mounting hole so i guess i dont understand how him opening the sensor would cause the bulging around the metal sleeved mounting hole from the inside the sensor not to mention, the white crusty junk in the large cracks around the bulge. I think its pretty cut and dry......

[@ccccen]

BUT, can you tell which is the bad sensor without having to get a diagnostic or removing to find out that you removed the wrong side?

[@Halffast719]

question off topic. just bought an 04 acura tl manual has code p2240. front o2?

[@sirsweetness8332]

Just fixed my 2006 Duramax. 1 sensor on middle of radiator bracket. No more airbag light 👍

[@Veikra]

conformal coating is the name of that snot

[@garrykoalman3684]

2:10 Why did you cover the name brand of QD Electronic Cleaner? Is it because you don't want to get sued CRC industries?

[@koraypekericli]

OK that clear large chip is most probably the microelectromechanical systems (MEMS) device that measures the acceleration. The signal is probably transmitted on CAN bus. I don't think the resistance is a measure of functionality. It definitely had water ingress which crapped out the circuit. I am not sure about the gel, though, maybe for vibration dampening? Not for conformal coating purposes probably, it really didn't work. Great video as usual! Thanks! Koray

[@DaCoder]

Im guessing its a constant stream of acceleration readouts to the SRS computer, that then decides if a crash has occurred.

[@frdradio]

Was that stuff inside the sensor corrosion or could it have been some type of dessiccant the manuf. put in there to try to keep it dry? Looked weird.

[@briansmobile1]

+frdradio The jelly is factory, but the corrosion and white stuff was not supposed to be there.

[@mworke]

The "goo" is conformal coating. It is used to protect and seal the electronic components.

[@briansmobile1]

+mworke Thanks! You're smart!

[@Makapo3791]

Did you get called out to that plane crash up your way? Pretty scary stuff.

[@Don.Challenger]

Brian, where your gloves today? If you had worn them, that goo would have been held at bay. Also nice to see Mrs. S.

[@dh5254]

What would happen if u tried cleaning the inside with electrical parts cleaner?? Would that make it easier to clean??

[@briansmobile1]

+david hurtado Much better things than using the closest dirt instrument! Ha ha ie. greasy brass brush.

[@LaterMeansBrick]

The chooch factor of the sensors dropped to negative because the electronic pixies died and got covered in mold aka corosion. AvE' videos did this to me. it is funny how moisture can get past the tiny contacts and seals and ruin the sensor.

[@koraypekericli]

Ha ha! Funny, a small group of people around the world getting connected through AvE, Dave-that-crazy-Aussie, Clive, Brian, Mike, and so on! We will all start talking with our "local" vocabulary! What's happening, I have no ideeeaaaa? :-)

[@briansmobile1]

+LaterMeansBrick I love the things I learn and the vocabulary is hilarious! I had no idea libdium disulphide was a thing. *(am I saying it right). IDK he's fun to watch though.

[@AuMechanic]

Stove pipe

[@ccccen]

Just wanted to know what was in it, me too lol thanks.

[@DaCoder]

Its an accelerometer, a proccessor, and probably some saftey checks too.

[@briansmobile1]

+Sean “S3EN” Slater Good call.

[@gfooce85]

LOL 8:12 “statue of liberty corrosion” LOL

[@UberAlphaSirus]

5 things spring to mind. 1 no confomal coating on the board. 2 wires from board to conector not insulated. 3 the gel is likley to dampen bumps to the circuit but started to conduct due to saltd. 4 the ultrasonic weld was shit when produced, so numbers 1, 2 and 3 shouldnt have happend in the first place. 5 bad design, planed obsolecence. torquing that bolt down on the structural tube will crack the seal around it. then thermal expansion/contraction and air preasure changes fuck it all up.

[@bradnimbus4836]

Oh my goodness! I bet that CTS can GO!

[@briansmobile1]

+Brad Nimbus I bet it does.

[@mph5896]

Well thats your problem, the government sensor is full of crap.

[@nickwilson1476]

ohhhhhhh.......dis new music be NASTY, BriMo.

[@D6Spanky]

Awesome fun time!

[@HUBBABUBBADOOPYDOOP]

In Layman terms- it's called "Potting Material". Depending on the need- it comes in different consistencies and colors, and it's used to protect circuits. To remove stuff like this- and to do all your electrical repair/rebuild projects- may I suggest this---www.autozone.com/miscellaneous-cleaners-and-degreasers/electrical-parts-cleaner/crc-electric-parts-cleaner/119711_0_0/ But be careful- this stuff is *strong*, and it will remove and melt automotive clear coats, paint, etc. and it will certainly *defat* your hands- so use PPE when using! It is the *nasty big brother* to what you already have there!

[@TrueBlueEG8]

At 4:00 the problem becomes apparent, it is that little bug that has been causing it!

[@gamo98]

it has a shock resistor in there

[@jdreyno1958]

👍

[@TRX450RVlogger]

Looks like the Same type of "Gooey shit" LOL that they put inside of a MAP Sensor.

[@robertruizcampwolfden8579]

And now you know

[@shanekauffman8649]

opening song?

[@briansmobile1]

+Shane Kauffman Golden Features remix of years of war.

[@DENicholsAutoBravado]

Jelly on a stick. Do I detect a Jeff Dunham moment? Lol. Once the "educative" portion was over I was certainly refocused to fun...though education is always fun too. :) Nasty booger stuff may be a silicone base?

[@briansmobile1]

+DE Nichols I'm sure it is. I just learned from Larry Bolan that it's called a "penetrable conformal coating."

[@DENicholsAutoBravado]

briansmobile1 That's an engineer named item if ever heard of one. Lol

[@jason-ge5nr]

i guess you had a darn good reason for no video on wednesday

[@briansmobile1]

+Albion Laster Ya, things have been movie grade crazy lately. Good things to spend time on, but at a cost.

[@Whoiamok]

Gooey stuff? Dried up dielectric grease.

[@thetwocargarage6703]

Seasonal affective disorder is a real thing.

[@Gaark]

what the music is?!?!?

[@briansmobile1]

+Jeff Parks 200 years of war gussied up by Golden Features. It's a remix that took something great and made it transdimentionally better.

[@briansmobile1]

+briansmobile1 You can find it free on Sound Cloud. I use about the minute and a half mark on to about 10 seconds that straight DJ magic.

[@Gaark]

Fantastic, thanks Brian :)

[@rehlek]

oh corrosion, isn't it a wonderful site?

[@briansmobile1]

+rehlek Corrosion is natures way of saying "HEY %@&$, what are you doing with that? That's mine- I'm taking it back!"

[@rehlek]

+briansmobile1 Haha you got it, been with Hyundai for a long time now, so many evap wires corroded to mother nature. Keep up the good work and awesome videos

[@Rick1885]

potenteometer (can't spell) you mean accelerometer.

[@fieldsofomagh]

gooie republic.

[@toroon]

Get those boogers Brian!!

[@DENicholsAutoBravado]

Hey, I"m early. I'm before one of the serial down voters. You know, that all your doing is giving him another view and a moment of ad time, right? lol Never mind, don't read this, keep it up. :)

[@briansmobile1]

+DE Nichols I'm just happy that they're thinking of me and tuning in. I'm truly flattered by their presence. Plus that COhunter1 guy likes all the same stuff I do. I can't help but like the guy and say thanks!

[@andrew6139]

hello I have bag light only if someone sits in the passenger seat after it stay on till the car is turned off. I have 2010 Chevrolet Aveo i bought a scanner and got the results of scan and hope you can help me with your understanding of results of data. here it is as follows: code B0081_0F PASSENGER PRESENCE MODULE ERRACTIC/ B10010_0 / SENSEING AND MODULE (SDM) OPTION CONFIGURANTION ERROR # 2 / SUPPEMENTAL INFLATBLE RESTRAINT / FAULT 12 THAT ALL HAVE FROM SCAN HOPE YOU WILL RESPOND SOON