That loose connector could be a classic example of people front probing forcibly with meter probes.

@Micko350

7 ай бұрын

Exactly what I was thinking too Clive, especially since the locking tab was already released!

@philmerrifield1163

7 ай бұрын

Clive, I hate it when people do that, just like a drees, just because you can make it fit, doesn't mean you should.

@TreyCook21

7 ай бұрын

@@philmerrifield1163 Same with those dang yoga pants, or leggings.

@harrywalker968

7 ай бұрын

chinese started minimising wires, sizes, wire is measured as a square amount or round, not sure which, but the chinese make it the smaller.. so your wire gauge is wrong. now car manufactures do the same, everything minimal, so,,it dont last & it breaks..buy pre 90 cars,, built correct..even wall plugs, are now made of sht alloy,,not copper.. same as power trans lines, alloy, rubbish,,.

@AntonioClaudioMichael

7 ай бұрын

I agree @BigCliveDotCom

Eric O, get yourself and 2 ohm resistor when your jumping airbag connectors. We used to use those on a breadboard, to test wire harnesses in place of air bags and impact sensors. This allowed us to test harnesses without risking lighting off airbags, and it would fool the control module into thinking the module or sensor was present. We built protoype harnesses for OEM development, this is how we tested them before installing them into vehicles.

Mr. O. is on hunt, yet again, to solve the elusive Envision sensor mystery. Will the new sensors fix the problem? Is Mr. O. on a wild goose chase? Will the lovely Mrs. O. grace us with an appearance? Can Mr. O. get the doors back together without the use of naughty words? Stay tuned for the next episode!

@ronallen6578

7 ай бұрын

Good recap😂😂

@donk7978

7 ай бұрын

As the plot thickens dun dun dun 😊

@noworriesmate5903

7 ай бұрын

I liked the watching soap, too.

@Lobo204RHF

7 ай бұрын

Same time, Same Bat channel.

@DeweyCheatumNHoweLLC

7 ай бұрын

"And what about Betty Lou at the diner"?😮

"I'm not a big electronics guy"... You do a darn good job of faking it! Long time fan, Eric. Love the videos!! 👍👍

I like Eric's procedure removing the door panels. Aggression without Excessing. He respects the customers equipment, not breaking things. Common sense goes a long way in auto diagnostics.

@joeblow6786

7 ай бұрын

Common sense... Regarding the way modern cars are assembled/manufactured... I don't know any more.

@joeblow6786

7 ай бұрын

Too much proprietary garbage!!

If Josh came up behind Eric and popped a balloon while he's testing it

@SouthMainAuto

7 ай бұрын

😳

@farmcentralohio

7 ай бұрын

Josh would only do that if the lovely Mrs. O told him to :)

@firstalawal

7 ай бұрын

🤣

@user-gy6vk1zb8n

7 ай бұрын

JOSH WOULD NOT BE WORKING THERE ANY LONGER...

Whenever I see you using one of the red plastic trim tools I sent you a few years back , it puts a little smile on my face.

Nothing better than waiting on your vehicle to warm up on a cold northern Michigan day when a SMA video pops up. Thanks Dr. O👍

@jeffsimonar7161

7 ай бұрын

What part of Northern Michigan are you from?(me Ironwood)

@nonyabiz2777

7 ай бұрын

We visit my wife’s family at the farm they own in Michigan. I never go in winter it’s to cold for me. Colorado is not nearly as cold. Also the roads in Michigan are pure ice. Stay warm brother.

Drag issue on the front pins were probably caused by the "other guy" that was in there poking around. Those little pins are kinda fragile.

If you think about it, the reason for the sensors setting a code on the opposite side and the door behind it is simply to give the vehicle the ability to sense a side impact where one of the sensors is working at all times on one side of the vehicle. It is a way of producing redundancy in the system and saving lives because it you linked both sensors on the same side into a common circuit, if one quits you lose the second and thus allow that side of the vehicle to have no ablity to sense an impact.

@LesReeves

7 ай бұрын

I would like to think they all link together in the airbag module so if one activates all do.Then that way you have saftey covered on all corners.

@kevink4914

7 ай бұрын

@@LesReevesyou think or you don’t think 🤷🏻‍♂️ like gm has been for a decade now. If no one is sitting in passenger seat. That side of airbags are not activated 😉😉💁‍♂️😂

@user-mk6sf8zv5d

7 ай бұрын

I hope you figure out wiring of impact sensors, I'd like to know. Great video

I work at a GM dealership body shop and my standard method for those door trim panels is once I get the panel off, the glass seal just slides off the metal clips then you can easily remove them individually and insert them back to the edge of the door and push the glass seal back onto them. Also a quick pass with a propane torch will bring the sticky back to that barrier adhesive.

@dwightvoeks9970

7 ай бұрын

Never thought about reheating those. 👍

@pontiacsrule8761

7 ай бұрын

That's a great idea about heating those seals. Beats getting out the duct tape Thanks for the tip.

@dewaynek8591

7 ай бұрын

@@pontiacsrule8761 it works great you just have to be careful, it’s a fine line between softening up the glue and melting the plastic, I usually make like three fairly quick passes and it evenly warms the glue without damaging anything.

Always fascinating, Eric…your videos about diagnosing tough problems are case studies in logic just as much (or more) than mechanics. Thanks for the education!

Nothing like a SMA video in the morning when I can’t sleep, mainly cause I’m on a stay vacation.

Hope the owner approves the repair and we get a part 2. Always love these electrical diag videos. Something I always want to improve myself with and you are helping me with your videos!!! Thank you for always making videos of cars that come into your shop!!! Hope all is well with you and also the family!!!! Love the channel!!!!

Some manufacturers do not allow srs wiring repairs if there is soldering or wire cutting involved. Toyota and Lexus are the most strict. You can look in their position statements to find out. Only legal option is to replace the harness in that case. Mopar sells repair kits for theirs and if you use anything other than that, if an accident happens and the system doesn't work coz you repaired the srs harness with something other than their kit your probably in hot water. Food for thought, working in the insurance repair industry the last few years has shown me a lot of technicalities i never thought of

@dropinbiking92

7 ай бұрын

Yeah we were never allowed to repair damaged SRS or airbag wiring in the body shops, which sucked, because it did hinder a lot of repairs that would have been economical. However legally we were not allowed. Wasn't worth the headache at our shop.

@autotek7930

7 ай бұрын

@dropinbiking92 I do it every day lol. I also replace a ton of harnesses with Asian manufacturers. Good money but terribly wasteful on their part. It comes down to resistance or probability of failure and someone suing the auto maker

@scrappy7571

7 ай бұрын

GM actually had a recall on the R/V vans to remove a connector under both seats, and solder the wires to by-pass the connector. Then, they had a recall to inspect the previous techs work. It turned into a cluster f@ck. I found SRS wires simply twisted and taped!!!! Oh and if the next guy had to remove front seats, he would have to cut the wires. WTF GM!?!

@LesReeves

7 ай бұрын

@@scrappy7571 My GM-H built in AUS has connectors to allow the seats to be removed maybe someone thought of that here.

@Allan-es2hz

6 ай бұрын

Honda for example refer to SRS harnesses as having measured resistance, and so no alterations are allowed by splicing, soldering or cutting of any SRS wiring.Having all the connectors, loom or tape etc in yellow denotes them as specific to the SRS sustem. Also when you remove a connector it automatically shorts itself internally until the latch is retracted and it is reconnected to a sensor.

I don't think I've looked at the subscriber mark in a while. 850K! Way to go Doctor O!

Typical Eric O modesty. "I'm not an airbag guy at all" but continues to give some of the best info on the system ever put out on video.

Love them GM cars! 13 codes...My Dakota is 23 years old,no codes-go figger Built when Mercedes engineers and inspectors were at the factory watching the action

You're selling yourself short Mr O, I think you are an electrical wizard/genius. I've seen you pull off some pretty crazy diagnostics/repairs.

I feel your pain, buddy. In my line of work, the TVs get crappier every year too. They are designed to be put together ONCE, so it's easier for the monkeys on the assembly line. Lots of one time use clips that snap off etc...

Hell. I don't know and is why I am watching you. I absolute love following you down these rabbit holes. You should take me hunting...

Just like Christmas, NEW SMA video.

Regarding the loose fit of the connector on the LF impact sensor, it might have been caused by someone attempting to read voltage at the connector with a DMM. I caused a similar problem with the ABS system on a truck I used to own by probing the connector. I had inadvertently widened the socket and caused an open circuit to be detected by the system. I had to use a dental pick to bend the socket back to its normal shape, which fixed the problem.

Eric @ SMA - "Let me just go check service data real quick." All the viewers - "Let me just go check SMA youtube real quick."

great job...ur my number one channel really enjoy all of ur content have a good day!

great video thanks for sharing very valuable info

Great job as always. I appreciate your logic in tracking down issues rather than following the rabbit holes presented by OEMs.

Looking forward to part 2.great video Eric !!

@SouthMainAuto

7 ай бұрын

More to come!

I like that you tell me what you're thinking and why you're thinking it.

Hi Mrs. O. nice to hear your voice! Have a Merry Christmas!!

super interesting video. I was waiting for the bags to blow.

Cool video and good tips!

The air bag system has always been a mystery to try to figure out to me thanks for the video

'Her indoors' has a thing that vibrates, great for finding intermittent connections

Great diag thanks for sharing Eric

Thanks for the connector experts link, never heard of them.

Buick Thunder Thank you for the video

Eric O is so thorough with his diagnostics 👍🏻🏴󠁧󠁢󠁥󠁮󠁧󠁿

Great video and a perplexing situation with the crossover association. I'm surprised you didn't try a little swap tronics to verify wire integrity and parts performance. Merry Christmas to you and yours!

Was hoping for a Wilberts run, but still a great start to my Tuesday.

Hey Eric O, remember the days before computers ran everything? Back when each auto manufacturer had their own proprietary diagnostic connectors, OBD 1, when you pulled codes out of a ford with a test lite and you had a paper clip bent to short out the last two pins on the right side of a GM diag plug and count the money light flashes?

Awesome video! You get to learn some of the strangest things when you aren't trying to!?! They probably lost one sensor and when they lost the other, they finally had it looked at.

Thank you

Using a DMM with the standard probe tips can certainly cause damage to the connectors especially when the contacts a smaller than the probe tips. When working on micro electronics in our meter shop, we had probe extensions that went over the standard DMM probe tips that reduce the tip of the probe by half the size. Eliminating connector damage by forcing/spreading the contacts apart.

Excellent!

Mystery's a foot Watson.🔍 Should make for a must watch part 2.👍

Glad I know how to scan my own cars! Going back to having a OBD1 diagnostic on a laptop computer (about 1990). I was SO proud when I trapped an intermittent fault (O2 sensor flatlined and then came back) that the dealer couldn't duplicate!

Ur the best I’ve ever seen.

Eric, I absolutely love your videos! I learn something from each and every one and really enjoy the family interaction. You make us all feel like a friend looking over your shoulder... Thank you and Mrs. O for all you do! Love the after hours videos too!!! In this case, would it be a bad idea to install used sensors and connectors from Wilberts? The cost would be minimal but perhaps being safety equipment you don't want to take any chances like aftermarket sensors.

@mattmanyam

7 ай бұрын

In my opinion, do what you feel is best on your own vehicle, but on a customer's vehicle, in this case, I think the best course would be new oem parts.

Great Job Again!!!!

Eric, Great video - thank you! Please bring us along for the follow up. Paul (in MA)

Love your exray vision

It's interesting to watch you work through strange results.

Wow crazy. I would have been afraid to short those to ground, but glad to know they are ok. I thing you have to be in the seat also to get them to activate. I thought maybe a trip to wilberts for the connector !!

A hunt the green crusties video! Yay!

Cant wait to use tiger tight at work or pita love the videos love from AZ

Awesome video!

GREAT video, as always. It makes sense if the sensors in opposite corners are related. If not physically, at some level within the SRS module. If a car is hit on a corner (hard enough for the airbag to deploy), the person sitting in the opposite corner will likely smack their head, if their airbag doesn't also deploy.

@marcvdfv8431

7 ай бұрын

I was thinking the same!

@LesReeves

7 ай бұрын

Should not all deploy if the impact is hard enough to set one off ?

@Blazer02LS

7 ай бұрын

Not in more modern cars, they only trigger the ones for occupied positions if the impact was high enough at those sensors.

@LTVoyager

7 ай бұрын

That makes no sense. If you are sitting on the left side of the car and someone is sitting on the right side of the and the car is hit from the right, the person on the right will have their head smashed into the side of the car as the car is pushed towards them. The person on the left is going to be pushed towards the center of the car as the car is being pushed away from them. So, no, the person on the opposite side of the car isn’t going to smack their head against the air bag on their side of the car.

@Firemach86

7 ай бұрын

@@LTVoyager When the car's movement stops, the person opposite from the impact actually could impact the door on their side as they will still have momentum. This is how whiplash occurs during a head-on or rear-end collision.

Always enjoy learning from different sources, I visit regularly and thank you for providing a logical approach to diagnostics, have you had to deal with ford tailgate harness issues camera(s), electric latch/lock Intermittent or inoperative.

Hi Eric had same problem on Toyota turned out to be negative ground cable on battery was kinda loose love your videos stay safe

Hi Eric, as far as I'm concerned, you have the skills to diag and repair anything!!

That is similar to the way I tested air bag systems years ago. Once had a GM van that was in an accident. The passenger side air bag deployed but the driver's didn't and this was a frontal crash. The clockspring in the steering wheel had a bad connector at the airbag. When watching live data and the connector shorted at the airbag side, instead of zero volts the display was showing a slow increase in voltage. A new clockspring fixed the problem. Good one Mr. O. On to part 2.

That's an impressive collection of Rockauto magnets...

Great Video, God bless

Bob's your Uncle..loved that!

Absolutely positively without a doubt yes !!! The dealer would break it and and do everything possible to pass it on to the customer !

Great videos

Have fun with it

That's what the three vertical stripes on the Buick Badge forecast.

Carol just bought me those glasses last week for an electronics repair.

I guess I am fortunate. Own a 2018 Buick Envision with almost 80,000 on it., but I do have the turbo 2.0L engine. No problems yet. No repairs needed. Just maintenance and taking care of it. This includes washing underbody during the winter to prevent salt corrosion which I see on this video on this car is definitely happening (rust everywhere under the engine bay).

Man when you clear codes at the 6:00 mark I heard that pow, an kinda thought the air bags went. 😅😅😅 Guessing someone was doing tires in the other bay. LoL

I am waiting for you to take on a hybrid or full EV with electrical problems. If others can do it, YOU can do it.

@SouthMainAuto

7 ай бұрын

We don't even have those in our area

@2nickles647

7 ай бұрын

O....you mean like Ivan...😅 He likes a good challenge. Great kid.

13585852 is the GM part number for that connector. More than likely someone went after that sensor mistaking it for the code that was set for the side impact sensor and spread the terminals out.

This ride on the diagnosis express was very interesting. I hope the customer wants to go for the repair.

I think my guy for redundancy, it has an x pattern in the wiring to detect impacts. Now in a logical sense, it would work as the module would be able to detect if its just a short/open or if you've been hit in the broadside of you vehicle. great video as always

I've only just noticed the collection of drills in the background at the beginning of the video :)

that thing is a GMH Holden Captiva in Australia and mechanics love them and I'd never own one in a fit.

Cris cross situation reminds me of brake circuits 🤔🏴󠁧󠁢󠁳󠁣󠁴󠁿

2021 GMC Canyon! Customer wanted aftermarket tow mirrors installed. Spent most of my time messing with the door panel clips way to go GM. New cars are great until something goes wrong.

Yes Eric that happened to me in my 2009 Chevy 1500 (Chevy thunder)! Had a smaller doe hit my driver side door and deployed all my air bags. Front, side, and steering wheel and the only thing that happens to the door was a small dent. Pissed me off because I only got 40bls of the deer. It was small.

The cross cross setup kind of makes sense if your trying to save a couple of pennies. The module needs multiple sensor to trigger within so many milliseconds to trigger the airbags, if the left side airbags deploy the right side airbags would effectively be locked out. I don’t know if there are 2 or 3 sensors on each side, if 3 then even if rear door is tripped due to opposite side impact the 3 rd sensor could still provide the 2 impact detection to trigger that side airbag.

The deal is everytime you figure something out that 2-3 other shops looked at Then you just gained a customer forever! Then they spread the word and you grow. I run service out of truck (powersports and water toys)and I have no storefront and no advertising and I stay very busy. But after 44 years Im thinking of calling it quits Im tired and just keep few old customers.

Hopefully they'll be a part 2.

Thanks for the video Eric. no we can't do it.

Good morning Eric 😮

interesting test

New drinking game. Take a shot every time Eric cleared those codes

Hey Eric...I see terminal fretting on forklifts too like you had on the L/F impact sensor.. It causes speed, height and temp senor faults for me.. I work with fairly new machines and nobody has been probing these things..I chalk it up to cheap metal for the fitment issue for the L/F connector..Great diag bud..

Eric O luv you videos, what would happen if you use the f/r sensor to check the side ones, it looks as if they have the same conector. keep up the good work

I had two front sensors bad on a Mercedes, and could not believe both would fail at once. So, I learned a bit about them. Inside of the sensor, there is a “diagnostic resistor” across the two wires. That is how the controller can tell if the circuit is open or shorted. If the resistor opens, the code will set for an open circuit. You can test this with an ohmmeter on the sensor, which depending on the vendor seems to give between 1k and 75k of resistance. If the value is too low, it will complain about a short circuit. Failing as a short can also happen if the sensor detected hitting something according to some sources I read, like if the car is hit while the key is off. Both of my sensors were open circuit. I bought two used ones and both of those showed some resistance and the problem was fixed when I installed them. Because I was curious to see how two of them died at the same time, I opened one of the sensors to see what was up and found that the plastic had failed to seal well and let the brine into the part where the circuit board was and ate away the connection from the connector. Of course not all sensors may work this way, but in order to detect whether a circuit is open or shorted to ground or 12V, the cheapest thing to do is have a resistor to ground in the sensor and a resistor pulling up to VCC in the control module and looking for the expected voltage on the wire. This voltage detection works for switched, communication (eg CAN), and analog circuits, so I would be surprised to find anything else.

@oldcynic6964

7 ай бұрын

Don't understand a word, Ken, but I'm always prepared to listen to someone who has INVESTIGATED rather than just stroking his beard and musing.

@kell8603

7 ай бұрын

The diagnostic resistor should never 'open'. It's there as a diagnostic tool and there as a prevention of a zero ohm short to ground that could then burn wires, blow fuses and wreck havoc without it. The logic circuit reads that there is this resistor in series with the sensor. When there is a short in the impact sensor, all the logic circuit senses is the resistor - which also limits current. If there is an open circuit in the impact sensor, the logic circuit reads infinite resistance.

@kenchilton

7 ай бұрын

@@kell8603 Yes, it shouldn’t open, which is why they are broken. If the resistor opens there is no danger, since that is the same as the wire was cut or the sensor was unplugged. The voltage on the wire will float to the supply voltage of the pull up resistor in the module. If it shorts to ground, there is no danger since the only voltage is from the air bag module through the resistor inside of that module. The sensor only has the signal wire and a ground wire. No fuses will blow and wires will not burn on a short to ground or an open circuit. Both of these are common failures in signal wiring that modern cars detect and set codes for. The resistor I mentioned was not in series - it was in parallel. There was also another component that looked like a diode, a set of contacts, another two terminal part I could not free from the potting, and a magnet. Since I found the reason for the open right away, I did not spend more time on it to trace out how these other components were connected. In the working circuit, the module resistor is fed a voltage (probably 5V) on one terminal and the other terminal connects to the wire and the input circuit of the module. The other end of the wire has the sensor with the resistor to ground inside. The two resistors in this way make a voltage divider. If the supply voltage is 5V, and both resistors are the same value, the signal wire will normally sit at 2.5V. The module input can measure that against higher and lower thresholds, such as 0.5V and 4V. If the wire is over 4V, the circuit is “open”. If it is less than 0.5V, it is “shorted”. This is not necessarily exactly the resistances and voltages, but this is how it looks in the schematics and descriptions I found. Some sensors are more fancy and have other features to determine if there is a fault, but this crash sensor I took apart was amazingly simple for how much they cost.

I think you made a good diagnosis, Eric. I'm anxious to hear and see what you find, We've heard that story before about Buying a wiring harness to get the connector, I'd like to know who you talk to about getting the aftermark connectors, if you would please. Good job thank you

odd how the faults are crisscrossed between doors. But then that is GM I guess. Possibly a redundancy protection application to insure some Air Bags will always fire if system is corrupted electrically. Good video Thank you Mr. O

Good morning y'all! Eric, Please bring back "What's Up Wednesday's "

Here I was thinking that we were all going for a ride along to Wilberts for some good 'ol 2nd hand fixy upy stuff! That was bizarre(& now I'm 2nd guessing myself) because SRS related Wiring(inside the car at least) is all Yellow over here.

Good morning Eric

The sensors are probably sharing the same ground inside the airbag module. That is kind of "common" since the PCB is cheaper and less complex. So if you would open up the module you will pretty sure find those two pins going to one internal ground. And then the criss cross makes sense because if you would put both right side sensors (front and rear) on one ground you would loose a complete side in impact detection in a fault case. Making this criss cross you would at least have the chance that an impact will be detected - if the front fails you still have the rear and vice versa

I believe, shorting bars is the name given by manufacturers at the diagnostic module connector, they connect two sensors, two air bags with a jumping bar at the module. Usually I cut the wires to get a true ohm reading. And fix them afterwards. That's why you may get two different codes from different sensors.

Josh showing no mercy in the other bay.

Loose connectors can have several causalities but one not mentioned is cheap/weak materials used to make the female contact that 'relax' over time when exercised by big temperature differentials, vibration and other environmental factors.