+worldtrades Ironic, heh. Straight and to the point is my style. You'd probably want more detail to understand the background if you were in school though.
This is the best 3 minutes and 17 seconds I've ever spent on TH-cam. Technical and informative with no nonsense or stupid music. Great work, thank you!
Good video. ABS typically has 8 valves. This unit has 12 so it includes stability control functions but there are still only 2 valves per wheel. The other 4 valves are needed for directing fluid flow within the hydraulic assembly and isolating the master cylinder. ESC can pump the fluid in either direction while abs only pumps fluid back to the master cylinder.
Damn......I have tried to understand ABS system for many years, and this guy just made me understand it 100% in under 3 minutes....you are the best sir!
The ABS has 3 valves per wheel to Isolate, Dump or Pressurize each wheel circuit as the ABS module sees fit. The ABS pump runs every time the module requests it and it is used to pressurize any circuit the ABS wishes to. Great video
Finally a video showing how ABS works instead of showing what it does!!!! This video moves pretty fast (thank goodness for pause and rewind) but it's so awesome! Exactly what I was was looking for! Thanks so much for this informative, straight to the good parts, video!!
Maybe 4 years ago they didnt put computers in ABS modules like they did in 2011 on the Ford Fusions..............................................................................
My lexus hybrid had an accident & the automechanic guy said they'd have to change/repair the ABS, so I got curious to know more and voilà your 3mins Masterclass enlightened me beyond measure. Thank you for this masterfully & straight-to-the-point ABS-for-dummies video. Cheers sir 👍
I have 40 years in Aviation working on abs systems to far more wheels and amazed how auto adopts so much from this. I want to say your video was the most detailed learning experience to show someone with no idea how it works to at least understand this complex system. I hate that they make them with such crappy parts (miniaturized relays that can't take the abuse they need) solenoids that using lower power and much smaller currents can fail case in point Corvette braking system in abs. cost for new one $1400 bucks for a 6 dollar relay known for going bad. I miss analog in its rawest form of durability. We live in a digital world and analog has to be shrunk to make it work with less current. My point is Bravo to you for doing such a great video and the explanation was spot on.
this is perhaps the best presentation so far . I have had a jammed ABS Valve on my 2008 Citroen C5 ABS module . soaking a towel wrapped around the aluminium valve body of the ABS module with boiling hot water and rapidly tapping the aluminium block with a small 2 oz hammer has freed off whichever ABS valve which was stuck in the operated position .I now have brakes and a pedal which no longer sinks to the floor . opening the caliper bleed screw is super important when installing new brake pads . Contaminated brake fluid passing through the ABS valves will almost certainly cause the valves to lock. There will be no ABS fault showing . My Foxwell NT630-Plus ABS scan tool was indicating there was a valve which was not operational .. an audible CLICK should be heard when each solenoid is activated . I have a second hand ABS module coming from EBAY and I intend to fabricate a manifold to test the individual valve operations .
Nice video. No wasting time screwing around while we have to sit and watch every screw being taken out, no camera jostling, no out of focus, you explain everything without mumbling, sniffling, "aah-ahh-uhmm", no gay music...shit, you should do a video on how to do TH-cam videos!
That was the best most succinct and accurate video in the universe. This is what a TH-cam video should strive to be. I was looking for information, I got the information without all the bumbling around. Thank You.
This is a very useful video in terms of showing what is inside an ABS modulator and what to expect if you take various parts off. It's not great in terms of explaining how ABS works.
Hi Fella' I have been watching other technicians stripping ABS pumps, you are the only one to me that has done a great commentary and visual explanation of the operating system. so her goes my attempt at fault finding on the ABS pump and control module. Thanx. Tom in Ayr Scotland.
there is no such thing as master cylinder input and return. there are two separate brake systems in case of brake failure, master cylinder has two chambers built in.
+Marijus Marcinkus I agree, thanks. The fluid flows back into the reservoir when the pedal is released. The power steering system on the other hand, has a supply and return.
@@mars188 No. It controls valves and a motor. If a wheel is just about to slip (or already did), then the pipe towards the wheel is shut off. (It is a default-open valve.) If desired effect is not achieved, then the valve to the motor is opened. The motor forces brake fluid back to master cylinder, reducing brake power on that wheel. When stabilized, this default-off v. is closed.
Hey man... I just want to say thank you... your video I simple and yet very informative... even someone like me that is not very mechanically/car minded can understand what is going on... I wish all TH-cam videos were like yours...
Excellent. Makes me think I could easily bypass the ABS system by simply tying the lines from the front and back of the master cylinder to the front and back brake lines.
Actually, the motor only makes pressure in ESP operation, since no pressure is applied on the brake pedal. The main purpose of that motor is to flow the excess brake fluid from normal ABS operation (when ABS kicks in, some of the fluid is released inside a chamber and has to be resent to the brake fluid reservoir when the pedal is released)
Its dosent need the motor for returning the fluid.. this dosen't make any sense.. for that you could just run a line to the fluid tank.. if the abs kicks in.. the valves release some pressure.. if you are downhill and keep the foot of on the brake pedal.. the pressure realising will eventually make the pedal end on the floor. The motor is there to rebuild the pressure when the wheels regain grip and the ABS stops.
That speed sensor system is a magnet that has the tone ring passing by it. This induces AC voltage that the computer reads. Faster the tone ring moves past the sensor, the higher the voltage. Simple troubleshooting is to put a voltmeter set to read AC voltage on the pins in the connector. Jack up the wheel and spin it. This should show a voltage.
Of course, this unit's electric motor is entirely serviceable with screws fastening the housing on. Then you have manufacturers like BMW who TRY to make the motor housing on ABS assembly factory press-wedged together so you have to file parts of the aluminum valve body to free the housing then drill holes in the housing in order to access the tongue of the clips that hold the motor in the housing. Great informative video on ABS module assemblies!
Thanks a lot bro I was searching for a detailed video like this. Very helpful I'm really into ABS brake I just love it. I really search in depth about how ABS system evolved
This video is so good, showing the ABS motor is really a scarce thing on youtube....the downside is that the explanations could have been slower and a little bit elaborate....
Great information . I see online that several places rebuild these units . Some use a module in addition to the pump and motor . These are expensive as new . I can see why a rebuilt unit can save money . As long as the quality is there .
ABS needs only 2 valves per wheel, this unit that you have has also ESP, which has additional 2 valves for each braking channel allowing it to have controlled pressure on each separate wheel :)
Very informative video. Would be nice if someone open the aluminum housing or just explain how the fluid is routed on each brake line? This would help a lot of people diagnosing issues with their regular braking due to ABS module.
Is the solenoid actuator coils suppose to be loose??? I have a 2005 GMC Sierra and I’m having problems with abs and brake light coming on at the same time and I’ve already soldered all the pins on the circuit board but also noticed that my coils are loose! Is that normal or are they suppose to be tight???? Thanks
now how hard is it to put one of these systems on some hydraulic sim racing pedals and control them via software. Hook up game telemetry abs signals to it and make the brake shake. Seems as easy as power the motor and hit the valve with the abs signal.
As the video states when a wheel starts to lock up the pressure to that wheel is released. The wheel rolling onto ice or snow commonly causes this. Then if the wheel rolls onto dry pavement again and regains traction you want the braking action on that wheel to increase again. This requires that more pressure be applied to that wheel. Since the driver may be holding his foot steadily on the pedal the DC motor is required to supply the extra pressure necessary to reactivate the brake after traction on that wheel is regained.
This is a fairly old type of ABS. I think this is the first generation of it. These were made before the year 2000, nowadays the ABS systems are way more sophisticated.
1) NICE VIDEO! 2) No circuit board and easy access cover (I like that). Same unit as my FORD Fusion. I've fixed GM ABS modules that have a circuit board with solder failures and difficult sealed cover to remove. 3) Wish there was a description of the workings of the 2 plungers under those rubber plugs.
Great video.Would you offer an opinion as to why so many of these units fail, particularly in European cars?Is it the solder joints in the control board?
Solenoid coils since they have very small wires probably get fried on some abs modules depending on the quality of construction. Spark coil packs have the same problem, small thin wire wrapped a bunch but then high volt zaps so they fail more often than abs probably. And ya solder joints may break or were soldered bad from the factory. And finally the coils on the electric abs motor may fail.
Great to know how ABS pump actually works. However, are ABS pumps repairable? When these pumps fail, what are the component that usually fails and can we fix it instead of replacing the whole unit?
Thanks man , you've solved this puzzle for me as I was thinking and trying to get my head around it , your explanations are right on target and very simple to grasp , TH-cam should've shown me your channel long time ago since I watch videos like this pretty much all the time , although this is the first video of yours which I just watched , I can confidently say that you know what you are talking about 👍 .
Top video! Ive never bothered to mess with an abs pump before but that was a perfect explaination of wtf goes on in there. Im sending this to my mate with a v rod cos his has fuct up. :)
man, you are awesome in teaching. i really appreciate your videos its so informative in a way there would be no confusion understanding it. good job sir !
Don’t think HCUs have a master cylinder return. Master cylinder usually has a built in bias for the front and rear pressures going into the HCU. The input ports from the master cylinder usually will be labeled MC1 and MC2 the larger diameter pipe of the two being the front brake supply. Usually. But hey I could be wrong.
@@speedkar99 old cars had a split volume master cylinder with two runs to a proportioning valve. In modern ABS units it’s referred to as a proportioning block and the same applies to the master cylinder just with slightly different fluid handling. Actually to convert to manual brakes would be to just copy the architecture of the MC1, MC2, LF,LR,RF,RR inputs and outputs on the machined block on top of the solenoids of an HCU and delete the solenoid ports keeping the same volume proportions as designated by the stock design.
Great video man, absolutely outstanding! Just one thing - when you show the splines on the CV shaft, I believe the arrow is actually pointing to the tone ring. The splines should be just where your right palm is.
Great video!! Thanks a ton mate. Straight to the point, and explained exactly HOW does it work, rather than WHAT it does like in the other videos on youtube!!
Wonderful explanation!!! Quick Question: Can the 12 coil solenoids be cleaned like with electric cleaner and or a pipe brush/toothbrush?... as my control unit does not work. I sprayed some on my plug connector but not the solenoids. Or could I use something different to clean if necessary. Thanks!
At about 2:25 you mention a "big chunk of machined aluminum that's not really serviceable." But... we see the large black end caps with maybe a screwdriver slot in them. I'm guessing this is where the reservoir/accumulators are. If I'm correct, this is where the ABS blows of pressure with each pulse. It may be a nitrogen bladder inside a chamber, and excess liquid pushes into the chamber and compresses the bubble. Is this correct, and if so, how big is the chamber and bladder?
That's not how the system works but it is a close enough explanation for a layman. There is a control board with a microcontroller under those coils even though it is not visible. Each of the 12 coils has a transistor which controls it. The motor is also controlled by an h-bridge chip on the board. The abs system on some cars also has a pressure sensor. And the system communicates with the engine, transmission, air bag computers over a dedicated network as part of vehicle stability system. Lots of information is being shared, including vehicle speed, steering wheel angle, what kind of road surface you are on, torque at the wheels, mileage, etc. You can replace the transistors on the board if they go bad in some modules, but Bosch system used on European cars are not serviceable because of the design. They even fill the board with a special gas to keep moisture out and prevent short circuit.
this is by far the best explanatory video on ABS on youtube
+Burak Soner Thank you
could not agree with you more.. spot on .. really the best explanation.
i agree
And it got watched by 109 people right after being dumped by the boyfriends.
@Burak Soner The Best brother. the guy explained it like you can use it for any school.
I'm taking a $5000 automotive course with one of the best schools and your video explained everything MUCH better than anything I've learned.
+worldtrades Ironic, heh. Straight and to the point is my style. You'd probably want more detail to understand the background if you were in school though.
Welcome to TH-cam University😅
Wow, I didn't think it was possible to explain this much about ABS internals in just over 3 minutes. Extremely well done!
Thanks, short and to the point is how its gotta be
This is the best 3 minutes and 17 seconds I've ever spent on TH-cam. Technical and informative with no nonsense or stupid music. Great work, thank you!
is it still true?
3 minutes of pure, condensed knowledge. Phenomenal video.
Thanks!
This guy is on one of the best explainers on TH-cam.
Well thanks
Good video. ABS typically has 8 valves. This unit has 12 so it includes stability control functions but there are still only 2 valves per wheel. The other 4 valves are needed for directing fluid flow within the hydraulic assembly and isolating the master cylinder. ESC can pump the fluid in either direction while abs only pumps fluid back to the master cylinder.
Good to know
Damn......I have tried to understand ABS system for many years, and this guy just made me understand it 100% in under 3 minutes....you are the best sir!
incredible, you explained an entire system in 3 minutes and made my understanding of it jump by 300%.
I swear you are the best teacher that exists regarding auto mechanics. I will surely give you 20 bucks if i have an easy way to do it
The ABS has 3 valves per wheel to Isolate, Dump or Pressurize each wheel circuit as the ABS module sees fit. The ABS pump runs every time the module requests it and it is used to pressurize any circuit the ABS wishes to.
Great video
Yup
Thanks
so what your saying is the owners of cars with abs.. have three wishes?
Finally a video showing how ABS works instead of showing what it does!!!! This video moves pretty fast (thank goodness for pause and rewind) but it's so awesome! Exactly what I was was looking for! Thanks so much for this informative, straight to the good parts, video!!
+Daniel Dickey Thank you for the feedback. Yes a bit fast paced so you don't fall asleep.
Maybe 4 years ago they didnt put computers in ABS modules like they did in 2011 on the Ford Fusions..............................................................................
My lexus hybrid had an accident & the automechanic guy said they'd have to change/repair the ABS, so I got curious to know more and voilà your 3mins Masterclass enlightened me beyond measure.
Thank you for this masterfully & straight-to-the-point ABS-for-dummies video.
Cheers sir 👍
I have 40 years in Aviation working on abs systems to far more wheels and amazed how auto adopts so much from this. I want to say your video was the most detailed learning experience to show someone with no idea how it works to at least understand this complex system. I hate that they make them with such crappy parts (miniaturized relays that can't take the abuse they need) solenoids that using lower power and much smaller currents can fail case in point Corvette braking system in abs. cost for new one $1400 bucks for a 6 dollar relay known for going bad. I miss analog in its rawest form of durability. We live in a digital world and analog has to be shrunk to make it work with less current. My point is Bravo to you for doing such a great video and the explanation was spot on.
Thanks I'm glad that video helped
this is perhaps the best presentation so far . I have had a jammed ABS Valve on my 2008 Citroen C5 ABS module . soaking a towel wrapped around the aluminium valve body of the ABS module with boiling hot water and rapidly tapping the aluminium block with a small 2 oz hammer has freed off whichever ABS valve which was stuck in the operated position .I now have brakes and a pedal which no longer sinks to the floor . opening the caliper bleed screw is super important when installing new brake pads . Contaminated brake fluid passing through the ABS valves will almost certainly cause the valves to lock. There will be no ABS fault showing . My Foxwell NT630-Plus ABS scan tool was indicating there was a valve which was not operational .. an audible CLICK should be heard when each solenoid is activated . I have a second hand ABS module coming from EBAY and I intend to fabricate a manifold to test the individual valve operations .
Thanks for the feedback
Nice video. No wasting time screwing around while we have to sit and watch every screw being taken out, no camera jostling, no out of focus, you explain everything without mumbling, sniffling, "aah-ahh-uhmm", no gay music...shit, you should do a video on how to do TH-cam videos!
100% correct.It didn't have the 5 minute intro of boring bs either!
+Matty Bt thanks
+Andork Kuomo Thanks that is my style!
This channel is really underrated. Thanks for explaining on abs n cruise control best ones.
wow, great video, well edited and filmed and straight to the point. Wish more videos on youtube were this well made. Cheers.
+Star Star Thank you
There are, but TH-cam rewards/favors longer videos, especially those over ten minutes.
Agreed
I like the way each wheel has three solenoids, it's very loving.
Sure is
These 3 minutes & 17 seconds was really worth it
Glad it helped!
That was the best most succinct and accurate video in the universe. This is what a TH-cam video should strive to be. I was looking for information, I got the information without all the bumbling around. Thank You.
Finally a clear explanation of the ABS, THANK YOU !!
You are welcome. I have another more complex and system video coming soon
Your videos are more educational than going to school. No homework and to the point.
Great description...no music, no nonsense.
This is a very useful video in terms of showing what is inside an ABS modulator and what to expect if you take various parts off. It's not great in terms of explaining how ABS works.
Thanks for the feedback
short and straight to the point. A very nice video.
Hi Fella' I have been watching other technicians stripping ABS pumps, you are the only one to me that has done a great commentary and visual explanation of the operating system. so her goes my attempt at fault finding on the ABS pump and control module. Thanx. Tom in Ayr Scotland.
Thanks, I'm glad you find my videos easy to follow
Clear, concise, and no fluff. Well made, good job, and thank you.
+3 Drinks In that's my style
The most organized and accurate explanation, thumps up .
there is no such thing as master cylinder input and return. there are two separate brake systems in case of brake failure, master cylinder has two chambers built in.
+Marijus Marcinkus I agree, thanks. The fluid flows back into the reservoir when the pedal is released. The power steering system on the other hand, has a supply and return.
@@speedkar99 so the abs pump just controls the valves ? does not pump break fluid ?- so if the pump goes out would you still have breaks?
@@mars188 No. It controls valves and a motor. If a wheel is just about to slip (or already did), then the pipe towards the wheel is shut off. (It is a default-open valve.) If desired effect is not achieved, then the valve to the motor is opened. The motor forces brake fluid back to master cylinder, reducing brake power on that wheel. When stabilized, this default-off v. is closed.
Great video you covered all the spects and show how much is worth and the need to work your brakes
Thanks I'm glad you appreciate my work
Brief but complete. Great explanations covering exactly what we should learn, thank you.
+Sergio Valente that KS I'm glad you learned something!
Where were you all these years? The video is 3 mins but full of information.
Hi
I've been here all these years
Where have you been? 🤣
I LOVED how you did this video!! Very informative!! Clear picture and explanation of how the ABS system works!!
Thanks, glad you enjoyed it.
You can imagine how much your teaching me,,,I have excellent retention and memory. Thanks
I'm glad you learn from my videos! That's what I made this channel for - sharing knowledge
@@speedkar99 I can do pretty much anything, because my mind is always open and not to proud to learn ..
@@speedkar99 so many making vedios that don't really know, and trying to sell a product, like the lockup kits...
Finally someone who actually explains this well.....
+Crazystuffyousee thanks
Not much on this out there eh
Thanks for a clear and concise explanation of ABS system.
Awesome. I'll have an updated ABS video by the end of this year.
Sweet video! Great explanation and teardown. Right to the point without all the yippity-yap. No click bait here!
Thanks. Short and to the point is my style!
Hey man... I just want to say thank you... your video I simple and yet very informative... even someone like me that is not very mechanically/car minded can understand what is going on... I wish all TH-cam videos were like yours...
+Evo K I'm glad you appreciate my video style. Thanks
Excellent. Makes me think I could easily bypass the ABS system by simply tying the lines from the front and back of the master cylinder to the front and back brake lines.
Actually, the motor only makes pressure in ESP operation, since no pressure is applied on the brake pedal. The main purpose of that motor is to flow the excess brake fluid from normal ABS operation (when ABS kicks in, some of the fluid is released inside a chamber and has to be resent to the brake fluid reservoir when the pedal is released)
+Morbid Dawn yes, exactly
Thanks thats exactly what I was wondering about!
Its dosent need the motor for returning the fluid.. this dosen't make any sense.. for that you could just run a line to the fluid tank.. if the abs kicks in.. the valves release some pressure.. if you are downhill and keep the foot of on the brake pedal.. the pressure realising will eventually make the pedal end on the floor. The motor is there to rebuild the pressure when the wheels regain grip and the ABS stops.
The motor runs even if your foot is on the brake pedal. The ABS module may add more pressure after it isolates the wheel that is slipping.
The master cylinder supply lines are front and rear chambers. There is no "Return Line" as this video said.
+Twisted thanks for the correction
I was highly educated in a short period of time. Quality content, no BS!
That's my style!
Good vid and straight to the point. This is how all vids should be.
Thanks, that's my style!
That’s a lot of information in not a lot of time. Well done!
Thank you !
That speed sensor system is a magnet that has the tone ring passing by it. This induces AC voltage that the computer reads. Faster the tone ring moves past the sensor, the higher the voltage. Simple troubleshooting is to put a voltmeter set to read AC voltage on the pins in the connector. Jack up the wheel and spin it. This should show a voltage.
Yes but it's not AC voltage, it's a pulsed DC signal
This is a really easy to understand video on how this works, thanks for the video!
Glad you liked it!
Thank you, now I know how to test each solenoid valve.
You are welcome!
Nice video. Quick and to the point with nice diagrams, explanations and diagrams. Much appreciated
+martyfriedman666 thanks, short and to the point is my style, check out my other videos
Excellent diagram! Perfect disassembly! Quick. Clean and simple! Thank you for doing this video. I loved it!
Of course, this unit's electric motor is entirely serviceable with screws fastening the housing on. Then you have manufacturers like BMW who TRY to make the motor housing on ABS assembly factory press-wedged together so you have to file parts of the aluminum valve body to free the housing then drill holes in the housing in order to access the tongue of the clips that hold the motor in the housing. Great informative video on ABS module assemblies!
Excellent, Excellent video. Clear and right to the point! Thanks for taking the time to make it!
+itaintmebabe99 Short and to the point is my style! Check out my series of reverse engineered car videos for more.
A brief, great explanation! Thank you so much for this video!
You are welcome
Thanks a lot bro I was searching for a detailed video like this. Very helpful I'm really into ABS brake I just love it. I really search in depth about how ABS system evolved
Glad you learned something
This video is so good, showing the ABS motor is really a scarce thing on youtube....the downside is that the explanations could have been slower and a little bit elaborate....
Thanks Bro your a genius
you made it is to understand something that seemed so complex.
Great information . I see online that several places rebuild these units . Some use a module in addition to the pump and motor . These are expensive as new . I can see why a rebuilt unit can save money . As long as the quality is there .
Thanks you for showing the actual ABS hardware ✌🏽
Your welcome
An actual person explaining it, well done!
I am sick of AI videos, they way they speak hurts my brain.
Thanks for making these! 😀👍
ABS needs only 2 valves per wheel, this unit that you have has also ESP, which has additional 2 valves for each braking channel allowing it to have controlled pressure on each separate wheel :)
+barabasiosif agreed
Great video...succinct narration with clear and concise explanation of each component. Excellent!
Excellent! So much info in such a short video. I wish more people would make videos this way..
Thanks, short and to the point is how it has to be.
Short, sweet, very informative. Very well made!
Best video.. Pls make a video on heating of brake fuild while braking.. Also a video on how much water the brake fluid absorbs...
you sir are a good teacher ,thats why I subscribed and thank you.
+Rashid Rehman Thanks
Check out my other videos for more
Very informative video. Would be nice if someone open the aluminum housing or just explain how the fluid is routed on each brake line? This would help a lot of people diagnosing issues with their regular braking due to ABS module.
Is the solenoid actuator coils suppose to be loose??? I have a 2005 GMC Sierra and I’m having problems with abs and brake light coming on at the same time and I’ve already soldered all the pins on the circuit board but also noticed that my coils are loose! Is that normal or are they suppose to be tight???? Thanks
Yeah mine were loose too. As long as it's making contact
speedkar99 is there a way I can check to see if they are making contact? I soldered them but wanna be sure before I go back with it!
now how hard is it to put one of these systems on some hydraulic sim racing pedals and control them via software. Hook up game telemetry abs signals to it and make the brake shake. Seems as easy as power the motor and hit the valve with the abs signal.
They already use this in modern cars with automatic braking
really good video, tho i don't understand from it what does the DC motor do.
+Gábor Zsótér It provides pressure to the braking system
Isn't that what the servo is supposed to do?
As the video states when a wheel starts to lock up the pressure to that wheel is released. The wheel rolling onto ice or snow commonly causes this. Then if the wheel rolls onto dry pavement again and regains traction you want the braking action on that wheel to increase again. This requires that more pressure be applied to that wheel. Since the driver may be holding his foot steadily on the pedal the DC motor is required to supply the extra pressure necessary to reactivate the brake after traction on that wheel is regained.
earned a subscription after seeing one video! not eeven because i was asked, because this guy is top notch for content!
Thanks!
I rate this 10/10. Its nice to find this video before going to sleep, I have an exam in two hours D:
Very cool explanation. Now my question is, if this circuit is NO during operation why is it necessary to bleed the ABS system?
Air can get in there when changing the master cylinder or if you let loose a line to change a caliper.
Good video , and good explanation... faster, understandly. Thanks master.
You are welcome
nice video. I knew what an ABS do but no idea how, thanks
+Nana Gil glad you learned something!
Great job! And done in under 4 minutes!
Awesome thanks
Clear and concise video, thanks for sharing your knowledge with the ABS system
You are welcome
90% is a big chunk of aluminium.
This is a fairly old type of ABS. I think this is the first generation of it. These were made before the year 2000, nowadays the ABS systems are way more sophisticated.
+Baladár Oh yes they are so sophisticated that the car can brake itself!
1) NICE VIDEO!
2) No circuit board and easy access cover (I like that). Same unit as my FORD Fusion. I've fixed GM ABS modules that have a circuit board with solder failures and difficult sealed cover to remove.
3) Wish there was a description of the workings of the 2 plungers under those rubber plugs.
Thanks
Great video.Would you offer an opinion as to why so many of these units fail, particularly in European cars?Is it the solder joints in the control board?
+Matty Bt solder and solenoids burn out
Solenoid coils since they have very small wires probably get fried on some abs modules depending on the quality of construction. Spark coil packs have the same problem, small thin wire wrapped a bunch but then high volt zaps so they fail more often than abs probably. And ya solder joints may break or were soldered bad from the factory. And finally the coils on the electric abs motor may fail.
Your explaination is very good as I can understand.
Great to know how ABS pump actually works. However, are ABS pumps repairable? When these pumps fail, what are the component that usually fails and can we fix it instead of replacing the whole unit?
Excellent video boss, clear, well edited( and short!). Well done
jojotogo10 Thanks
Thanks man , you've solved this puzzle for me as I was thinking and trying to get my head around it , your explanations are right on target and very simple to grasp ,
TH-cam should've shown me your channel long time ago since I watch videos like this pretty much all the time ,
although this is the first video of yours which I just watched , I can confidently say that you know what you are talking about 👍 .
+Nahid Bepari thanks. I do my research before shooting videos so I can explain things easier. I'm glad you appreciate my work! Thanks
Top video! Ive never bothered to mess with an abs pump before but that was a perfect explaination of wtf goes on in there. Im sending this to my mate with a v rod cos his has fuct up. :)
+theravedaddy thanks, glad you learned something
man, you are awesome in teaching. i really appreciate your videos its so informative in a way there would be no confusion understanding it.
good job sir !
Hi, Im getting error C1391, saying that there is abnormal leak in accumulator. Do you know what might be wrong?
I don't know the codes for your vehicle off hand, but if you follow it's repair manual it gives you a step by step diagnostics
speedkar99
The problem is, it is impossible to find manuals for Hybrid version. No one seams to be making them.
We have a '91 Mitsubishi 3000 with a brake fluid leak that seems to be from the part near the ABS motor where the brake lines are connected to.
Needs new brake lines?
I'll see if I can get a closer look.
Awesome video; concise, informative and comprehensive.
+ya472 that's my style. Thanks !
Don’t think HCUs have a master cylinder return. Master cylinder usually has a built in bias for the front and rear pressures going into the HCU. The input ports from the master cylinder usually will be labeled MC1 and MC2 the larger diameter pipe of the two being the front brake supply. Usually. But hey I could be wrong.
Don't master cylinders have brakes wired in diagonal positions for each cylinder?
@@speedkar99 old cars had a split volume master cylinder with two runs to a proportioning valve. In modern ABS units it’s referred to as a proportioning block and the same applies to the master cylinder just with slightly different fluid handling. Actually to convert to manual brakes would be to just copy the architecture of the MC1, MC2, LF,LR,RF,RR inputs and outputs on the machined block on top of the solenoids of an HCU and delete the solenoid ports keeping the same volume proportions as designated by the stock design.
Great video man, absolutely outstanding! Just one thing - when you show the splines on the CV shaft, I believe the arrow is actually pointing to the tone ring. The splines should be just where your right palm is.
Thanks
Great video!! Thanks a ton mate. Straight to the point, and explained exactly HOW does it work, rather than WHAT it does like in the other videos on youtube!!
Quick and complete explanation!
+Axeltreman thanks.
Wonderful explanation!!! Quick Question: Can the 12 coil solenoids be cleaned like with electric cleaner and or a pipe brush/toothbrush?... as my control unit does not work.
I sprayed some on my plug connector but not the solenoids. Or could I use something different to clean if necessary.
Thanks!
At about 2:25 you mention a "big chunk of machined aluminum that's not really serviceable." But... we see the large black end caps with maybe a screwdriver slot in them. I'm guessing this is where the reservoir/accumulators are. If I'm correct, this is where the ABS blows of pressure with each pulse. It may be a nitrogen bladder inside a chamber, and excess liquid pushes into the chamber and compresses the bubble. Is this correct, and if so, how big is the chamber and bladder?
Thank you. It's very useful for me.
Nice job, I've learned something new today again! Thanks!!!!
Glad you learned something
That's not how the system works but it is a close enough explanation for a layman.
There is a control board with a microcontroller under those coils even though it is not visible.
Each of the 12 coils has a transistor which controls it. The motor is also controlled by an h-bridge chip on the board.
The abs system on some cars also has a pressure sensor.
And the system communicates with the engine, transmission, air bag computers over a dedicated network as part of vehicle stability system. Lots of information is being shared, including vehicle speed, steering wheel angle, what kind of road surface you are on, torque at the wheels, mileage, etc.
You can replace the transistors on the board if they go bad in some modules, but Bosch system used on European cars are not serviceable because of the design. They even fill the board with a special gas to keep moisture out and prevent short circuit.
Good to know this information thanks
Good video and explanation. What about the accumulator included on some ABS modules? Can you cover that as well?
I have some research to do on how that works 😉
Liked this video but I would have loved it if you had got to the other side of the motor inside the manifold to better understand the motor.
Looking back, Agreed