This is the kind of video us handy DIY guys need when we feel stuck. Now I can use my volt meter tonight to verify voltage with steering input before I spend $100+ on a new sensor. Appreciate you taking the time out of your day to share this!!
This is why having guys like you sharing your knowledge on variables regarding software can really make our daily job that much easier, better, and more importantly, helping us do our best to fix the complaint the first time. It's EXTREMELY valuable to have that kind of stuff available to help keep us in the know...soooo..."giving away trade secrets"....um...nooooo...how about doing the right thing to help out fellow tech's out there become more knowledgeable, efficient, and accurate when it comes to our diagnostic process! Loved the step-by-step going down the line checking the signal integrity. Great video Keith!
"C101 allows me to break the system in half.." I like that thinking. Thanks for sharing this Keith. I appreciate your inherent role as instructor. Thanks!
Excellent vid, Keith! I'm really glad the guys convinced you to do this. They sure speak highly of you and it's great to be able to learn directly from you. Thank you!
Its one thing knowing how to use the computers, multimeters, scopes, etc. but its a whole other story knowing how its suppose to work. I've never heard of a stering wheel position sensor? If you don't know how something works and and every manufacturer has a different idea on how to make something function it can be a can of worms. You are one in a million with the skill and knowledge you have learned over the years. Most customers are going to pay with the 99% who can only change parts. Thanks
Nice job, Keith! Keep 'em coming. SMA and Pine Hollow have been helping train this old retired guy for some time now. Your videos will be a welcome addition to the shows.
Excellent diagnosis and walk through. Seems lately these 2006 trail blazers have been giving a few techs issues with this exact problem so this video certainly will help.
Keith, awesome video! I had just one concern about the last voltage check at 11:45 when you are front-probing the EBCM connector. The "high" voltage was only 7.4V instead of the 9.4V at the other two locations. Also, the square wave is not as clean, and seems to decay on the high portions. The only explanation I can think of for this is that either your voltmeter ground is crusty, or there is an almost completely broken wire between C101 and the EBCM. The resistance is so high, that the10 MOhm voltmeter is actually pulling it partially to ground? Maybe try relocating the meter ground, and then the patented "Keith tug test" on the EBCM harness and see if the signal drops out completely? What are your thoughts?
But then again scan data was showing signal "A" stuck "high", and there is no way that could happen with a broken wire, since this looks like a pull-up design. New EBCM module it is! :)
Great job man! I am excited for more to come! Easy peasy diag on this bad boy, and I think you did more than sufficient enough of a job explaining testing procedures. Filming comes with challenges, but it gets easier the more you do it!
Triangle Diagnostics It definitely does , and I never know how I am going to do it or when. I was interrupted about 50 times while trying to make this one . Part of why the editing is so poor. At one point the shop owners head was between the camera and the tablet lol. So it was a little rushed needless to say. Glad you liked it ! And your videos are coming along great btw , keep up the good work
For anyone interested: The index pulse in a common digital incremental encoder (A+B+X) or position sensor is to provide a reference position by counting either direction from the Index. 1 phase (A) can tell you how far and how fast the encoder moves. 2 phases (A+B) can also tell if the sensor reverses rotation or direction. However, an A+B+Index sensor would have to be keyed to always match the steering wheel's true center and geared down to allow for more than one wheel rotation from center to either stop. In this case , the SAS module has 2 sensors. The digital pulse A+B side tells the brake controller the direction and velocity the steering wheel is turned while the other sensor must report the steering angle since the A+B side cannot provide absolute position. At 6:25 you can see the 3 lines for the other sensor in the SAS module and I suspect that the ABS module is ignoring one or more of those lines along with the A-Phase line so it can neither read the angle nor the velocity. Nice vid of something a bit different, Keith :)
Eddie the Grouch you have no idea how bad I wanted to explain that part Eddie , and I am so glad you brought it up ! I am equally as happy that you are a sub and supporter ! So Thank You !
Eddie you say that the sensor is not keyed but it does have a steering angle position measured in degrees. How is it calculated then? I diagnosed a sensor last week and fully turned to the left it read .25volt and about 75% it read 4.90volts then dropped to 0 the rest of the way til it his the stop it was about .10 volt. Do they have to be clocked to a certain position when replacing? I know the steering wheel needs to be locked in the center position to keep from breaking the clock spring is that also to calibrate the steering angle sensor? Thanks for the info on how it works
Good catch, John. I should have noted that I was referring to a general purpose rotary digital encoder. SAS modules should be clocked according to directions and the system reset/re-programmed as needed. In your case it sounds like you are measuring an analog sensor (variable resistor / potentiometer) that varies a 5v reference according to the angle. The voltage ramp should be smooth stop to stop if you have a full travel sensor. I've made corrections to my first comment and apologize for the confusion. I should avoid commenting while sleep walking in the future...
You are correct it is a variable resister, and the signal is smooth up til it get to about 75% then it drops to .10V. I have never personally changed one I just do diag work. I have looked at Mitchel and Alldata and I am unable to find anything on calibrating or reprogramming the sensor it basicly says remove and replace. I have the Verus and also do not see anything for the SAS only the YAW sensor. Thanks for the info
Fantastic job Kieth. Clear, concise and very well explained. Dorman crap is everywhere! they are the relabel kings! Fortunately at this point in time it was not the reason for the fault. I ounce had an 01 Audi A6 (when i was working at STS) that would keep coming back with a misfire because the coil pack was failing I think it was a Dorman i don't remember but it was crap. 3 times! i told the Service manager lets get an OEM coil, nope. But we did get a German made aftermarket part (northside imports in edison) that was a little more expensive and more a permanent fix than that crap that was installed the first 3 times. car never came back for that issue. BTW 99 maxima owner decided to just junk the car instead of fight with the shop that did the T-chains.
Auto Fix Pal aww man what a shame about the Maxima , it was 75 percent done for a great case study. And yes Dorman really infiltrates our industry and they stink for the most part. Glad you liked the video !
Great work Keith and nice diagnostic process. What seems like a simple process of separating the connector to isolate who's at fault, it's surprising that a lot of people wouldn't think of this. If you get the time when the module comes in, it would be nice to see the reprogramming of the module. It doesn't seem to be a lot of stuff out there for that. I do reprogramming at work, but it's pretty much for PLCs. Thanks again for shooting a video out of your busy schedule!!!
There's lots of books and videos out there Dexron3, but I couldn't say if they were any good or not and maybe a lot of them are outdated. I always say that if you're going to learn something such as PLC programming, sit down with the piece of equipment and play with it. Here's a few links to inexpensive PLCs where you can play with them and learn about programming. If you're really interested in learning about PLCs, the small price of these units is worth the education versus going to a technical school or university. www.kincoautomation.com/products/plc/?gclid=COnjzYjc59MCFZePswodtcULdQ velocio.net/?gclid=CKyYg73c59MCFU5LDQodms8Gjw plccompare.com/cheap-plcs/ www.allaboutcircuits.com/news/low-cost-programmable-logic-controllers-for-the-frugal-engineer/ Also, to get you started, do a search in TH-cam for 'plc programming tutorial for beginners'. This will give you an idea of the instruction set that's common to the PLCs out there. Examples would include counters, timers, relational and comparison functions, PID loops, and a slew of other functions. Have a good one Dexron3 and good luck on your venture in PLC programming!
That explains the glare (which I did not mind at all) on the screen! You didn't even have to show the square waves or lack of... a simple "this is what you look for" would have been enough. So for you to take the time and actually shop step by step, is Top Notch!
New Level Auto the voices in the background are like gods from heaven especially that English guy and Thomas you need to put your hand in your Skyrocket a lot more That's more rhyming slang for you guys lol
Great video Keith! I just diagnosed the same code last week on same vehicle. My problem was with the steering angle degrees it is the 5th wire over. With wheel turned all the way to the left I had .25 volts and as I turned the wheel it gradually went up till I got to 4.90volts and I was only about 75% of all the way to the right. I made about 1 more turn and it dropped to 0V and as I continued to turn I think it went up to maybe .10volts. I told the shop that he needs a new sensor, his reply was "That is a brand new sensor from GM". So I had to show him what the problem was before he believed me. This was last week and I haven't heard from him so I guess a new sensor cured the problem So there is 2 hall effect and a variable sensor all in one? Great bypass test I will have to remember that one
Like Bill N Ted would say...Excellenttttt. Love all your videos Keith. They either teach me new tricks or remind of some you forget when you get to caught up in a diag...
guayaco3299 I try really hard not to get caught by the tunnel vision , just have to remind myself that it is just a machine. The vehicle isnt out to get me 😂. Hope it all helps in some way and thank you again for watching !
Great video and nice explaining at the wiring diagram, I had a BMW 5 series 2003 model and ABS module seems to have high rate of failure, traction control lamp come on sometimes both ABS and Traction control lamp both lit. looking forward for more videos when time give you a chance to make a video.
g johan Extremely high rate of failure on those ! I should do a video on them soon . I have one next week to look at , and if time allows you will see one
your a natural Keith .keep them coming.love this type of repairs..seperates the technicians from the parts changers...no offense to parts changers but sub to Keith's channel and rise above the norm. thanks again..
I will be learning a lot from you Keith, thank you very much!!! I love diagnostics and many shops around here have a parts cannon. The scope is not embraced around this area and it's sad. I look for a job at the shops and I get passed by anyways I'm looking forward to your next video.
Flatrate Master Glad you liked it Mike , and thanks for the support . Was really a good time chatting on the exovcds channel. We will have to do that again sometime
The Alldata you guys get in the US is soooo much better than the European version. The Euro one I subscibe to is basically factory manuals. A great tool to have but no where near as much of a guide as yours. Great job Keith.
One Auto the guy from AllData Europe told me their data base is just as good as US version before i subscribed.now that i'm a member they telling me will take 3 years to get there so sucks😭😭.Quite a few vehicle manufacturer not even exist in their system and certain model repair information very poor .I've tried many data base and none of them nowhere near as good as these guys use in US.Makes diagnosis so much easier having the right info, diagram and step by step guide. Wish i would live in US Greg
great video keith u did a wonderful job with explaining everything. i look forward to seeing more im glad u are making videos now. diag vids are my favorite i love seeing your thinking process thanks for taking the time for us man keep them coming and your channel will grow super fast
Dylan Kinch I really appreciate your support , and I am glad you like it . Hard to think of ways to explain my thoughts when I diagnose something , but I will try to keep it up!
I so wish I had a subscription to wiring diagrams , the description help side bars are worth their weight the missing PID on the scan tool would upset me if I invested $$ in one . Thanks for showing is the way .
David S. If you are out there searching for information like the others here , then that puts you ahead of many others that think they know enough already! Thank you for watching
I hear Thomas's live chat in the background. no wonder it took you so long to make this video! great video and testing Sensi Keith! I would have liked to seen you program that module but I know time is a limiting factor.
I have the same issue man on my 07 Trailblazer, I changed my steering angle sensor two times and traction control light and abs light comes on still, also when turn the steering wheel and light will come on, am hoping it's the abs control module 👍🏼, thanks for sharing your video
that was great Keith. with the module being faulty would that cause the 2mph read outs that i noticed on the wheel sensors or is that not related? just seemed odd that the car was stationary and it was reading 2mph. looking forward to the next one.
Great video Keith though, can you explain to me the following. In the wiring diagram how is the voltage reg. output connected directly to ground, also the transistors (phase A & B sensors) seems to be flipped over, the emitter should be connected to the EBCM not the collector. Is the diagram wrong or I'm missing something? Thanks for your wonderful channel.
You are right. The transistors, which are presumably phototransistors arranged in quadrature fashion on a rotary encoder, are indeed drawn flipped over. Very annoying, because at a glance it suggests that these transistors are performing ground-side switching.
billmck12345 actually if it pulled to low using the test light that would mean the new sensor had failed or that there was a pin fitment problem at the sensor itself
ok I see now.. signal gets manually pulled down and ebtc reports through the scanner... which would leave the circuit in an open state but part of the circuit is showing a bias voltage of 5 volts...so would I start looking on the other side of that sensor circuit for pin issue/or sensor.... sorry to get drawn out on this, just tryin to learn here keith...
billmck12345 not sure of what I am missing in the question. The sensor is providing the bias and the signal. If I manipulate the signal out and the ebtcm status does not change then I test from C101 to break the system in half
sorry my question was about direction, when you were attempting to pull down "a" with the test light...it didn't pull down...it was just a question on what if it did....thanks for explaning...
Thanks for the experience man.Just one question : If the turn signal was not present at Brakes module connector BUT present at midway connector this would mean the wire from the midway connector to brakes connector is short to ground and mechanic need to use test lamp at midway connector to check for short with connector disconnected.
David Christine I own one of those myself, it is nowhere near as fast as my launch, but it is a very capable tool. However I do like being able to remote into someone else's Launch tablet to assist them on a vehicle when they are stuck. Autel has tried to make their version of this work and they've failed miserably. Again though they are both great tools. I need speed and accuracy not just accuracy. And Autel just doesn't suit my needs, but it may fit yours perfectly
Man, i was just working on an 06 trailblazer for abs issues and was wondering why there was no SAS data. The diagrams showed it to be there but no data was available. Thanks for the video...
Ha! Then this morning I get a trailblazer with a c0455. I did find a bulletin that states to id the truck as an 07. Also in the bulletin it mentions to reflash the ebcm, then the SAS data will be available.
Wow,go figure,who ever it was that was throwing the wrong parts at it needs to be schooled. Not sure how you would check the ABS control module but honestly,you know it cant be the steering wheel position sensor,so obviously thats the next link in the chain. Another mechanic theowing the wrong parts at the problem rather than doing what you did. Thankyou for the lesson. I have an 03 Trailblazer with 200k and have to admit,other than a transmission rebuild recently,it has treated me very well. Other than the usual maintenance stuff and a pesky fan clutch issue( which I have decided to just ignore) She runs great.
I thought Paul Danner is the only one who uses T-Pins? I just had an 2006 Trailblazer with a CO455, does that sensor also give off an analog signal that corresponds with the two digital signals? Thanks Keith for taking the extra time to teach us all!!!
How would a regular guy know to go to a 2007 instead of a 2006? Is that just experience? This is the first time I've seen a steering wheel angle video or even heard of one. Man I got a lot to learn and I'm 60, time's running out! (Ha ha) Great video Keith. it was well explained.
wyattoneable Honestly it was just a gander when it seemed like info was not making sense. I went down a year and up a year just to see . That part comes with experience I suppose . Glad you liked it !
Ebcm ....did the replacement solve the issue .. I have the same problem with that exact code and don't want to change a position sensor if ebcm solved the issue
major 007 Not everyone has to like the videos , but if they give a thumbs down I would at least like to know what they didnt like . Thanks for the support ! More videos on the way
roadkill5333 Nowaday nothing is really just a simple anitlock brake system. Almost all manufacturers like to incorporate traction control. And when it comes to Suv's they also add rollover protection . This all gives me an idea for a video that can help explain a little better. And new module is on its way, I will make a follow up video when I receive it so I can explain the programming process also
billmck12345 thanks!! I forgot about the GM thought process! Alternator gaskets! Fuel injection return spring! And the rear wiper control module having the key in ignition buzzer all in one! ;-)
It's part of the stability control system. Compares steering input with a yaw rate sensor to detect understeer or oversteer and supplies brakes to try to correct it. All new cars come with it.
I had the same concern as Ivan, but then I drew the same conclusion he did. Thanks for this awesome video Keith. Is that scan tool a GM specific one? Blue Driver definitely doesn't has those PIDs!!
Can you list the name and model/number of the tech 2 scanner you have? I wanna learn how to do stuff like this actually diagnosing, as opposed to throwing parts at a vehicle. For example, my 4wd service lights on on my 02 Trailblazer and I think I need the tccm replaced. But I need a tech 2 scanner in order to read the tccms codes. And even if I knew it was bad and replaced it, everything I read says you need a tech 2 scanner to "program" the new tccm; how is that programming done when you have a scanner like the one you have?
No worries, I know you're a busy man. I have an interesting case on a BMW e61 -04. The Fuel level indicator in the instrument doesn't work until you drive it. It slowly climbs up until you stop. Then it goes to empty. Had the scanner on it and the sensors (2) in the tank shows accurate. Also noted if you pull the fuse, it will reset the fuel level and it will stay until you stop. Haha, funny times.
Josh Clark When nothing seems to add up and your data isnt there , you cant get stuck , you must try something different . In this case I went down a year and up a year in the scan tool to find what I was looking for
Thank you for sharing this great video! I have a similar problem and wanted to ask a question. Occasionally, especially when it gets very cold outside, stabil-track fault light comes on, and usually after 10 min of driving if I restart the vehicle, it does not come back the same day. I used Tech2-Win and both channel A and B send HIGH and LOW pulses. There is also number above which tells the actual angle of the steering wheel and that changes as I move the wheel as well. On a single occasion I noticed the wheel angle was at 400 degrees, but I know the night before it was left straight (0 degrees). I also get C0455 error code from the brake control module. Could it be the sensor? Bad connection on some of the connectors? What is your experience with these? Greatly appreciated any input to help me resolve the issue!
I apologize for the delay. So I just checked, the analog voltage is 2.44V when the steering wheel is reading 0 degrees. When I slightly move to the right jumps to 2.50V, just before it switches over to 8 degrees. At about 8 degrees, the voltage is 2.56V. I have not had the stabili-trak service light come on since the other day...it happens only in the morning, and when it gets below about 20F degrees outside. Could it be the steering wheel position sensor or something else? I know these intermittent issues can be very hard to track down.
Ainstain K do the same test while lightly wiggling the connector at the ABS module . If it's not happening now , we might have to wait. Also verify the connector is clean and tight near the uhjb
New Level Auto I didnt forget about this post, just was unable to perform the test because of the bad weather here in MI. But I did not have the service light come since that first posting, so it tells me there could be a loose wire I hope at the connector. I will try to remove the connector in the next few weekd, clean it with some CRC connection lubricant and try re-plugging in again several times to hopefully remove any oxidation that has built. I will post the updates.
This might be a dumb question why not check at each end starting at the brake module if you have it there no need to test other locations. If isn't there testing in the car to see if it was at the blue and green wires would then tell yo if it was a possible wire issue. If you have it at the brake module testing would be done correct. I was wondering if you did it this way just for your video to show how to read diagram and find and locate all points in the diagram?
+John Gibson only because of location . I had no lift for access and the shield covering it had bolts ready to snap. So I went where I could to get the testing theories across in the most video friendly way possible
and is there a way to calibrate it, or fix it without scan tools, I just dumped $330 on a scan tool only to tell me the 07' Trailblazer can't be calibrated.
Thanks so much for these great videos they are right on point this is how we learn. Unreal..., i have a 06 malibu for a angle sensor install and programming today any tips or tricks i should look out for with this malibu .
8power0 any and every vehicle has the possibility of having either wrong service info , diagrams , heck even programming files. I try not to take anything at 100 percent face value. If humans are involved mistakes can be made . Thanks for watching !
Hey Keith, great video! Question? Isn't there also an analog signal plus the two digital signals? I had good signals at the ebcm but looking at the wiring diagram there is another signal on pin 3 lt/ bl. Thanks for all your hard work Keith!!!
This is the kind of video us handy DIY guys need when we feel stuck. Now I can use my volt meter tonight to verify voltage with steering input before I spend $100+ on a new sensor. Appreciate you taking the time out of your day to share this!!
This is why having guys like you sharing your knowledge on variables regarding software can really make our daily job that much easier, better, and more importantly, helping us do our best to fix the complaint the first time.
It's EXTREMELY valuable to have that kind of stuff available to help keep us in the know...soooo..."giving away trade secrets"....um...nooooo...how about doing the right thing to help out fellow tech's out there become more knowledgeable, efficient, and accurate when it comes to our diagnostic process!
Loved the step-by-step going down the line checking the signal integrity.
Great video Keith!
"C101 allows me to break the system in half.." I like that thinking. Thanks for sharing this Keith. I appreciate your inherent role as instructor. Thanks!
Baxrok2 Yes sir I love making those decisions that save time . And as always thank you for supporting me!
Excellent vid, Keith! I'm really glad the guys convinced you to do this. They sure speak highly of you and it's great to be able to learn directly from you. Thank you!
johnaclark1 Sometimes I think they make me over rated 😃, either way I am glad you liked it , thanks again for the feedback
Keith
absolutely great direction in separating the circuitry. Nice of you to join in with the best of guys. Have fun.
Fantastic video! Concise, to the point, no rambling, filled with good info! Thanks a lot, I'm sure your channel will take off like a rocket!
Its one thing knowing how to use the computers, multimeters, scopes, etc. but its a whole other story knowing how its suppose to work. I've never heard of a stering wheel position sensor? If you don't know how something works and and every manufacturer has a different idea on how to make something function it can be a can of worms. You are one in a million with the skill and knowledge you have learned over the years. Most customers are going to pay with the 99% who can only change parts. Thanks
Nice job, Keith! Keep 'em coming. SMA and Pine Hollow have been helping train this old retired guy for some time now. Your videos will be a welcome addition to the shows.
Excellent diagnosis and walk through. Seems lately these 2006 trail blazers have been giving a few techs issues with this exact problem so this video certainly will help.
Techman 48917 Glad to know it can help someone ! Thanks for your support !
Keith, awesome video! I had just one concern about the last voltage check at 11:45 when you are front-probing the EBCM connector. The "high" voltage was only 7.4V instead of the 9.4V at the other two locations. Also, the square wave is not as clean, and seems to decay on the high portions. The only explanation I can think of for this is that either your voltmeter ground is crusty, or there is an almost completely broken wire between C101 and the EBCM. The resistance is so high, that the10 MOhm voltmeter is actually pulling it partially to ground? Maybe try relocating the meter ground, and then the patented "Keith tug test" on the EBCM harness and see if the signal drops out completely? What are your thoughts?
But then again scan data was showing signal "A" stuck "high", and there is no way that could happen with a broken wire, since this looks like a pull-up design. New EBCM module it is! :)
Pine Hollow Auto Diagnostics The other explanation was that the booster pack was going obscenely low 😂
i like your style on the videos you've put out. concise and to the point.
richard cranium Glad you like them , I am still unhappy I don't have time to add more to it . Thanks again for the support !
richard cranium I agree. no added fluff but still has all the good stuff.
You ,Sir , are very knowledgeable guy. We are lucky you decided to start making videos. Greetings from Greece.
GPTech Thank you for watching!
Great job man! I am excited for more to come! Easy peasy diag on this bad boy, and I think you did more than sufficient enough of a job explaining testing procedures. Filming comes with challenges, but it gets easier the more you do it!
Triangle Diagnostics It definitely does , and I never know how I am going to do it or when. I was interrupted about 50 times while trying to make this one . Part of why the editing is so poor. At one point the shop owners head was between the camera and the tablet lol. So it was a little rushed needless to say. Glad you liked it ! And your videos are coming along great btw , keep up the good work
Triangle Diagnostics take note in the future. Straight ahead steering wheel analog voltage MUST read about 2.5 volts
You address complaints that makes dealership wish you would take the car somewhere else! niiiiiiice, thanks
For anyone interested: The index pulse in a common digital incremental encoder (A+B+X) or position sensor is to provide a reference position by counting either direction from the Index. 1 phase (A) can tell you how far and how fast the encoder moves. 2 phases (A+B) can also tell if the sensor reverses rotation or direction. However, an A+B+Index sensor would have to be keyed to always match the steering wheel's true center and geared down to allow for more than one wheel rotation from center to either stop. In this case , the SAS module has 2 sensors. The digital pulse A+B side tells the brake controller the direction and velocity the steering wheel is turned while the other sensor must report the steering angle since the A+B side cannot provide absolute position. At 6:25 you can see the 3 lines for the other sensor in the SAS module and I suspect that the ABS module is ignoring one or more of those lines along with the A-Phase line so it can neither read the angle nor the velocity.
Nice vid of something a bit different, Keith :)
Eddie the Grouch you have no idea how bad I wanted to explain that part Eddie , and I am so glad you brought it up ! I am equally as happy that you are a sub and supporter ! So Thank You !
Eddie you say that the sensor is not keyed but it does have a steering angle position measured in degrees. How is it calculated then? I diagnosed a sensor last week and fully turned to the left it read .25volt and about 75% it read 4.90volts then dropped to 0 the rest of the way til it his the stop it was about .10 volt. Do they have to be clocked to a certain position when replacing? I know the steering wheel needs to be locked in the center position to keep from breaking the clock spring is that also to calibrate the steering angle sensor?
Thanks for the info on how it works
Good catch, John. I should have noted that I was referring to a general purpose rotary digital encoder. SAS modules should be clocked according to directions and the system reset/re-programmed as needed. In your case it sounds like you are measuring an analog sensor (variable resistor / potentiometer) that varies a 5v reference according to the angle. The voltage ramp should be smooth stop to stop if you have a full travel sensor. I've made corrections to my first comment and apologize for the confusion. I should avoid commenting while sleep walking in the future...
You are correct it is a variable resister, and the signal is smooth up til it get to about 75% then it drops to .10V. I have never personally changed one I just do diag work. I have looked at Mitchel and Alldata and I am unable to find anything on calibrating or reprogramming the sensor it basicly says remove and replace.
I have the Verus and also do not see anything for the SAS only the YAW sensor.
Thanks for the info
Fantastic job Kieth. Clear, concise and very well explained.
Dorman crap is everywhere! they are the relabel kings! Fortunately at this point in time it was not the reason for the fault. I ounce had an 01 Audi A6 (when i was working at STS) that would keep coming back with a misfire because the coil pack was failing I think it was a Dorman i don't remember but it was crap. 3 times! i told the Service manager lets get an OEM coil, nope. But we did get a German made aftermarket part (northside imports in edison) that was a little more expensive and more a permanent fix than that crap that was installed the first 3 times. car never came back for that issue.
BTW 99 maxima owner decided to just junk the car instead of fight with the shop that did the T-chains.
Auto Fix Pal aww man what a shame about the Maxima , it was 75 percent done for a great case study. And yes Dorman really infiltrates our industry and they stink for the most part. Glad you liked the video !
Great work Keith and nice diagnostic process. What seems like a simple process of separating the connector to isolate who's at fault, it's surprising that a lot of people wouldn't think of this. If you get the time when the module comes in, it would be nice to see the reprogramming of the module. It doesn't seem to be a lot of stuff out there for that. I do reprogramming at work, but it's pretty much for PLCs. Thanks again for shooting a video out of your busy schedule!!!
stuzman Absolutely have plans for that follow up video , and thanks for the support as always !
Hi Stuzman! Any good quality video or book suggestion regarding PLC programming? Thanks!
stuzman www.udemy.com/plc-programming-from-scratch/ I had come across this for $10 , might be worth a gander ?
There's lots of books and videos out there Dexron3, but I couldn't say if they were any good or not and maybe a lot of them are outdated. I always say that if you're going to learn something such as PLC programming, sit down with the piece of equipment and play with it. Here's a few links to inexpensive PLCs where you can play with them and learn about programming. If you're really interested in learning about PLCs, the small price of these units is worth the education versus going to a technical school or university.
www.kincoautomation.com/products/plc/?gclid=COnjzYjc59MCFZePswodtcULdQ
velocio.net/?gclid=CKyYg73c59MCFU5LDQodms8Gjw
plccompare.com/cheap-plcs/
www.allaboutcircuits.com/news/low-cost-programmable-logic-controllers-for-the-frugal-engineer/
Also, to get you started, do a search in TH-cam for 'plc programming tutorial for beginners'. This will give you an idea of the instruction set that's common to the PLCs out there. Examples would include counters, timers, relational and comparison functions, PID loops, and a slew of other functions. Have a good one Dexron3 and good luck on your venture in PLC programming!
Keith, thanks for sharing your vast knowledge. This channel is going to soar!!!! Love the fact that you have a style of your own! Rock on mate!
chungaleta1234 The style is the hat😉, I really appreciate all the support ! Thank you
Top Notch Keith. The information system was key and how to use it. Well done. !!!
Top notch (quoting Steve Rob)! I'm gonna be learning a lot from your videos... thank you for sharing / taking the time to make & post!
Thomas EXOVCDS Did you hear those angelic voices in the background ? 😉, glad you liked the video!
That explains the glare (which I did not mind at all) on the screen! You didn't even have to show the square waves or lack of... a simple "this is what you look for" would have been enough. So for you to take the time and actually shop step by step, is Top Notch!
New Level Auto the voices in the background are like gods from heaven especially that English guy
and Thomas you need to put your hand in your Skyrocket a lot more
That's more rhyming slang for you guys
lol
I'm too chicken to look-up what that means!
Thomas EXOVCDS hahahahaha
Great video Keith! I just diagnosed the same code last week on same vehicle. My problem was with the steering angle degrees it is the 5th wire over. With wheel turned all the way to the left I had .25 volts and as I turned the wheel it gradually went up till I got to 4.90volts and I was only about 75% of all the way to the right. I made about 1 more turn and it dropped to 0V and as I continued to turn I think it went up to maybe .10volts.
I told the shop that he needs a new sensor, his reply was "That is a brand new sensor from GM". So I had to show him what the problem was before he believed me. This was last week and I haven't heard from him so I guess a new sensor cured the problem
So there is 2 hall effect and a variable sensor all in one?
Great bypass test I will have to remember that one
JOHN HUFNAGEL the word new. Stands for
Never
Ever
Works
Thank you taking the time to make this video! Good camerawork !!! Awesome test equipment .
DaveSender66 Glad you enjoyed it !
Great video with good explanations. Drawing on the diagram is a nice touch. Looking forward to seeing more.
Pet Rock's Garage I will certainly do my best , thanks for the support
Like Bill N Ted would say...Excellenttttt.
Love all your videos Keith.
They either teach me new tricks or remind of some you forget when you get to caught up in a diag...
guayaco3299 I try really hard not to get caught by the tunnel vision , just have to remind myself that it is just a machine. The vehicle isnt out to get me 😂. Hope it all helps in some way and thank you again for watching !
Excellent work and well documented procedure.
Cool video Keith. I'm glad you posted this. Hope to see more. Thanks!
Dylan definitley more on the way ! Thanks for watching !
Great video Keith
Looking forward to more of your work
a "new level" in TH-cam diagnostic videos too
Great video Keith. I see 3.2k subs already. You're channel is going to be huge.
Great video and nice explaining at the wiring diagram, I had a BMW 5 series 2003 model and ABS module seems to have high rate of failure, traction control lamp come on sometimes both ABS and Traction control lamp both lit. looking forward for more videos when time give you a chance to make a video.
g johan Extremely high rate of failure on those ! I should do a video on them soon . I have one next week to look at , and if time allows you will see one
That would be great, where I live there is nobody that understand this kind of troubleshooting.
Awesome diagnostics, Keith.
your a natural Keith .keep them coming.love this type of repairs..seperates the technicians from the parts changers...no offense to parts changers but sub to Keith's channel and rise above the norm. thanks again..
Javier Rocha Really glad you enjoyed it , and I will do my best to make these better !
Super effective diagnosis as expected. Thanks again for the excellent content!
Dan.vaku Glad to know it's coming across as intended , and thank you for the support !
I will be learning a lot from you Keith, thank you very much!!! I love diagnostics and many shops around here have a parts cannon. The scope is not embraced around this area and it's sad. I look for a job at the shops and I get passed by anyways I'm looking forward to your next video.
Damn good stuff. This channel is going to take off!
Che Kelley Glad you enjoyed it , and thanks for the support !
Awesome video, look forward to more! I have worked on a lot of Trailblazers and have never seen that issue, but very good info to know!
Flatrate Master Glad you liked it Mike , and thanks for the support . Was really a good time chatting on the exovcds channel. We will have to do that again sometime
New Level Auto A lot of fun chatting with you as well, definitely need to do it again!
The Alldata you guys get in the US is soooo much better than the European version. The Euro one I subscibe to is basically factory manuals. A great tool to have but no where near as much of a guide as yours. Great job Keith.
One Auto, Thank you Rob , I will have to find a better solution for your dilemma
One Auto the guy from AllData Europe told me their data base is just as good as US version before i subscribed.now that i'm a member they telling me will take 3 years to get there so sucks😭😭.Quite a few vehicle manufacturer not even exist in their system and certain model repair information very poor .I've tried many data base and none of them nowhere near as good as these guys use in US.Makes diagnosis so much easier having the right info, diagram and step by step guide.
Wish i would live in US
Greg
Injector Removal Yep totally agree!
Very nice video, good info and test process. Keep it coming Keith.
Love the vids man you Eric and Ivan are my favorite channels to watch diagnostics really interests me and you guys are the best at it
Very cool video man. Glad you are making some now as well! You, Thomas, Eric O and Ivan are my channels
Nick Palmer don't forget guys like Triangle , KY , Danner and others. Even I learn little tips from them .. a wealth of great guys out there
I did forget I watch Danner as well. Me being newer to diagnosing, you guys are teaching me a lot. Thank you for your work and making videos.
great video keith u did a wonderful job with explaining everything. i look forward to seeing more im glad u are making videos now. diag vids are my favorite i love seeing your thinking process thanks for taking the time for us man keep them coming and your channel will grow super fast
Dylan Kinch I really appreciate your support , and I am glad you like it . Hard to think of ways to explain my thoughts when I diagnose something , but I will try to keep it up!
That really was an awesome video. I hope you have the time to do many more.
I so wish I had a subscription to wiring diagrams , the description help side bars are worth their weight the missing PID on the scan tool would upset me if I invested $$ in one . Thanks for showing is the way .
Great videos! Thanks for taking the time to make these!
Thank you Keith. Your step by step explanation is crystal clear 😉
juergen scholl Very happy you liked it , and thanks for the input !
Your method and execution is spot on. If one day I get to be half as good I will be happy
David S. If you are out there searching for information like the others here , then that puts you ahead of many others that think they know enough already! Thank you for watching
A Very good diagnostic procedure, I learned a great deal from this, Thank you for sharing.
I hear Thomas's live chat in the background. no wonder it took you so long to make this video! great video and testing Sensi Keith! I would have liked to seen you program that module but I know time is a limiting factor.
The Disgruntled Mechanic I left it on as proof that I was mid video lol.
I have the same issue man on my 07 Trailblazer, I changed my steering angle sensor two times and traction control light and abs light comes on still, also when turn the steering wheel and light will come on, am hoping it's the abs control module 👍🏼, thanks for sharing your video
that was great Keith. with the module being faulty would that cause the 2mph read outs that i noticed on the wheel sensors or is that not related? just seemed odd that the car was stationary and it was reading 2mph. looking forward to the next one.
DIY Carguy not related , just another Gm quirk
thanks for the info on the pids, I just was trying to figure out the co455 on my stepsons 06 Envoy, thanks for doing great videos
Keith were did you get the lad top you used please can you tell me I need one of those thanks
cesar ponce That is a Microsoft surface pro 4 from Best Buy
Nice Diagnosis Keith!!!!!!! GM sure put that EBCM in a crappy spot
Zenmaister11 S At least this one has a skid plate to somewhat protect it . Thank you again for the support!
Great video Keith though, can you explain to me the following. In the wiring diagram how is the voltage reg. output connected
directly to ground, also the transistors (phase A & B sensors) seems to be flipped over, the emitter should be connected to the
EBCM not the collector. Is the diagram wrong or I'm missing something?
Thanks for your wonderful channel.
You are right. The transistors, which are presumably phototransistors arranged in quadrature fashion on a rotary encoder, are indeed drawn flipped over. Very annoying, because at a glance it suggests that these transistors are performing ground-side switching.
nice work man good to see you making videos
Can't wait to see more thanks from Australia 🇦🇺
I will do my best to keep everyone happy and watching !
another great video!!! thank you for your time. i know recording probably hold's you up a bit. but we are thankfull.
luke cartwright Honestly the hardest part so far has been the interruptions , other than that I am really enjoying it . Thanks again for watching !
great vid keith, I like that test light test...so if that pulled to ground then it would be a broken wire/wiring problem? is that right
billmck12345 actually if it pulled to low using the test light that would mean the new sensor had failed or that there was a pin fitment problem at the sensor itself
ok I see now.. signal gets manually pulled down and ebtc reports through the scanner... which would leave the circuit in an open state but part of the circuit is showing a bias voltage of 5 volts...so would I start looking on the other side of that sensor circuit for pin issue/or sensor.... sorry to get drawn out on this, just tryin to learn here keith...
billmck12345 not sure of what I am missing in the question. The sensor is providing the bias and the signal. If I manipulate the signal out and the ebtcm status does not change then I test from C101 to break the system in half
sorry my question was about direction, when you were attempting to pull down "a" with the test light...it didn't pull down...it was just a question on what if it did....thanks for explaning...
Thanks for the experience man.Just one question : If the turn signal was not present at Brakes module connector BUT present at midway connector this would mean the wire from the midway connector to brakes connector is short to ground and mechanic need to use test lamp at midway connector to check for short with connector disconnected.
not to ask you a bunch of questions but what would you recommend? I was also looking at the autel ms906bt.
David Christine I own one of those myself, it is nowhere near as fast as my launch, but it is a very capable tool. However I do like being able to remote into someone else's Launch tablet to assist them on a vehicle when they are stuck. Autel has tried to make their version of this work and they've failed miserably. Again though they are both great tools. I need speed and accuracy not just accuracy. And Autel just doesn't suit my needs, but it may fit yours perfectly
Man, i was just working on an 06 trailblazer for abs issues and was wondering why there was no SAS data. The diagrams showed it to be there but no data was available. Thanks for the video...
You're quite welcome. Glad it helped
Ha! Then this morning I get a trailblazer with a c0455. I did find a bulletin that states to id the truck as an 07. Also in the bulletin it mentions to reflash the ebcm, then the SAS data will be available.
Wow,go figure,who ever it was that was throwing the wrong parts at it needs to be schooled. Not sure how you would check the ABS control module but honestly,you know it cant be the steering wheel position sensor,so obviously thats the next link in the chain. Another mechanic theowing the wrong parts at the problem rather than doing what you did. Thankyou for the lesson. I have an 03 Trailblazer with 200k and have to admit,other than a transmission rebuild recently,it has treated me very well. Other than the usual maintenance stuff and a pesky fan clutch issue( which I have decided to just ignore) She runs great.
Nice video Keith and great diagnosis
Hayward's Automotive Thanks Bob , always appreciate your support !
Good, fast pace. I like it. Car's registration sticker appears to say Suburban.
Sam G anything here with more than 4 seat occupancy is registered that way , Thanks for watching !
great video good information looking forward for more video's thanks for sharing
I thought Paul Danner is the only one who uses T-Pins? I just had an 2006 Trailblazer with a CO455, does that sensor also give off an analog signal that corresponds with the two digital signals? Thanks Keith for taking the extra time to teach us all!!!
the mad scientist finally joins TH-cam.... we've been waiting forever!!!
Michael L Heck I have been around for ..... well days , I've been around for just days😁 Thanks for watching !
Excellent! Hopefully one day we'll see a collaboration with you, Eric and Ivan over a couple of beers and a really puzzling problem auto lol
Niamh Healy I am sure that could happen one day soon 😀, thanks for watching !
That would be awesome. Maybe add a little Danner to that recipe also.
the dorman part works, suprised. good one keith.
NCPDFSB All I can say about the part is that it apparently has warranty , so best of luck to them on that . Thanks for watching !
Couldn't as for a better video. Was the wiring diagram for a 2006 or 2007 model year?
Michael Herbert Diagram was for a 2006 ! Gets confusing right 😀
What's the part number of the ABS control module you replaced?
Nice work. The MS surface tablet is perfect for tracing out wiring diagrams.
Can you use a used module and reprogram it to a nother car.
Rick Pallante in this case yes
How would a regular guy know to go to a 2007 instead of a 2006? Is that just experience? This is the first time I've seen a steering wheel angle video or even heard of one. Man I got a lot to learn and I'm 60, time's running out! (Ha ha) Great video Keith. it was well explained.
wyattoneable Honestly it was just a gander when it seemed like info was not making sense. I went down a year and up a year just to see . That part comes with experience I suppose . Glad you liked it !
Ebcm ....did the replacement solve the issue .. I have the same problem with that exact code and don't want to change a position sensor if ebcm solved the issue
great work, please keep them coming. and for the three trolls who gave the thumbs down please stay under your rock and don't mess with the master.
major 007 Not everyone has to like the videos , but if they give a thumbs down I would at least like to know what they didnt like . Thanks for the support ! More videos on the way
Did the new module fix it? It's strange for a brake control module to feature a steering sensor, or is that part of the brake system?
we're talking gm here...like the tpms in the door lock module...go figure
roadkill5333 Nowaday nothing is really just a simple anitlock brake system. Almost all manufacturers like to incorporate traction control. And when it comes to Suv's they also add rollover protection . This all gives me an idea for a video that can help explain a little better. And new module is on its way, I will make a follow up video when I receive it so I can explain the programming process also
New Level Auto Can't wait for the follow up, and explanation vid!! Thanks for sharing!
billmck12345 thanks!! I forgot about the GM thought process! Alternator gaskets! Fuel injection return spring! And the rear wiper control module having the key in ignition buzzer all in one! ;-)
It's part of the stability control system. Compares steering input with a yaw rate sensor to detect understeer or oversteer and supplies brakes to try to correct it. All new cars come with it.
Great video and thanks for taking the time to upload :)
AutoTechDale Thank you for watching !
Nice job setting things straight!
Ozzstar Appreciate you watching !
nice tip on the part number decoding
Hell yea Keith! Another great video. Keep them coming. 👍👍👍👍👍👍
Did this solve the problem I'm having the same problem please lmk asap
I had ctb 07 the same problem. Keith where you located at? Thank you for sharing
I had the same concern as Ivan, but then I drew the same conclusion he did. Thanks for this awesome video Keith. Is that scan tool a GM specific one? Blue Driver definitely doesn't has those PIDs!!
Moving Up Diy that is the Tech2 gm specific tool. I could've used others but I like the speed of that tool
Can you list the name and model/number of the tech 2 scanner you have? I wanna learn how to do stuff like this actually diagnosing, as opposed to throwing parts at a vehicle.
For example, my 4wd service lights on on my 02 Trailblazer and I think I need the tccm replaced.
But I need a tech 2 scanner in order to read the tccms codes. And even if I knew it was bad and replaced it, everything I read says you need a tech 2 scanner to "program" the new tccm; how is that programming done when you have a scanner like the one you have?
Awesome! Welcome to you tube.
Jason Beattie Thank you for watching !
I'm late, but good stuff! Part 2 on the Chevy Airbag module on the way too? :) Thanks!
AutoFocus working on that one also. Vehicle is a bread delivery truck and I need to finish the after footage . Hard to get our schedules aligned
No worries, I know you're a busy man. I have an interesting case on a BMW e61 -04. The Fuel level indicator in the instrument doesn't work until you drive it. It slowly climbs up until you stop. Then it goes to empty. Had the scanner on it and the sensors (2) in the tank shows accurate. Also noted if you pull the fuse, it will reset the fuel level and it will stay until you stop. Haha, funny times.
how do you figure out or find out its 07 softwear used
Josh Clark When nothing seems to add up and your data isnt there , you cant get stuck , you must try something different . In this case I went down a year and up a year in the scan tool to find what I was looking for
New Level Auto wow great tip im so glad you started making videos and share your knowledge thank u
Excellent thank you for taking the time Best regards
Thank you for sharing this great video! I have a similar problem and wanted to ask a question. Occasionally, especially when it gets very cold outside, stabil-track fault light comes on, and usually after 10 min of driving if I restart the vehicle, it does not come back the same day. I used Tech2-Win and both channel A and B send HIGH and LOW pulses. There is also number above which tells the actual angle of the steering wheel and that changes as I move the wheel as well. On a single occasion I noticed the wheel angle was at 400 degrees, but I know the night before it was left straight (0 degrees). I also get C0455 error code from the brake control module. Could it be the sensor? Bad connection on some of the connectors? What is your experience with these? Greatly appreciated any input to help me resolve the issue!
Ainstain K most importantly is the analog signal at about 2.5 volts with the wheels in the straight ahead position?
I apologize for the delay. So I just checked, the analog voltage is 2.44V when the steering wheel is reading 0 degrees. When I slightly move to the right jumps to 2.50V, just before it switches over to 8 degrees. At about 8 degrees, the voltage is 2.56V. I have not had the stabili-trak service light come on since the other day...it happens only in the morning, and when it gets below about 20F degrees outside. Could it be the steering wheel position sensor or something else? I know these intermittent issues can be very hard to track down.
Ainstain K do the same test while lightly wiggling the connector at the ABS module . If it's not happening now , we might have to wait. Also verify the connector is clean and tight near the uhjb
New Level Auto I didnt forget about this post, just was unable to perform the test because of the bad weather here in MI. But I did not have the service light come since that first posting, so it tells me there could be a loose wire I hope at the connector. I will try to remove the connector in the next few weekd, clean it with some CRC connection lubricant and try re-plugging in again several times to hopefully remove any oxidation that has built. I will post the updates.
wow keith you sir are one bad mother ! you made that look so easy
you the man keith keep up the great videos
jon dukeminier I appreciate it , and will do my best to come up with more
Excellent video! Hell, I didn't even know this sensor existed.
SHAKA38 Wait till you see what I have coming up ! Glad you enjoyed this one , thanks for the support
New Level Auto
I look forward to it. 👍
Bodgit and legit garage viewer here watching your videos
Brendan Brady fan always glad to see new people. B&L is one of my favorite channels . Generally side splitting fun !
This might be a dumb question why not check at each end starting at the brake module if you have it there no need to test other locations. If isn't there testing in the car to see if it was at the blue and green wires would then tell yo if it was a possible wire issue. If you have it at the brake module testing would be done correct. I was wondering if you did it this way just for your video to show how to read diagram and find and locate all points in the diagram?
+John Gibson only because of location . I had no lift for access and the shield covering it had bolts ready to snap. So I went where I could to get the testing theories across in the most video friendly way possible
and is there a way to calibrate it, or fix it without scan tools, I just dumped $330 on a scan tool only to tell me the 07' Trailblazer can't be calibrated.
China doesn't make bad part capitalist corporations do! Radio blaring in the background drives us crazy. You are still the master
Thanks so much for these great videos they are right on point this is how we learn. Unreal..., i have a 06 malibu for a angle sensor install and programming today any tips or tricks i should look out for with this malibu .
8power0 any and every vehicle has the possibility of having either wrong service info , diagrams , heck even programming files. I try not to take anything at 100 percent face value. If humans are involved mistakes can be made . Thanks for watching !
Ok but how do I fix it ? Idc about the diagnosis I want to know how to fix it
Thanks for the video. Will continue to follow your channel............Jay
Jay Hahn Glad you liked the video , more to come soon 👍
Hey Keith, great video! Question? Isn't there also an analog signal plus the two digital signals? I had good signals at the ebcm but looking at the wiring diagram there is another signal on pin 3 lt/ bl. Thanks for all your hard work Keith!!!
That's correct . And if you see another of these videos like this one that I made I make mention as well.