how to repair automotive computers

 how to repair automotive computers

Nissan Infinity Repair of the ECU IAC

automotive technology electrician in this article you'll learn all kinds of auto repair secrets how your automobile works and how to diagnose it okay today we're going to talk about a very recurrent problem on Nissan and Infiniti vehicles this is the iock motor what happens is is that the iock shorts out and they short out they come did they see you they see em however you want to call the Computer so we're going to explain here what to do when if you have an issue like that and this is very common it's it is so common in fact that there's a link in Amazon if you go to Amazon and you type in Nissan I ACR the idle air control of alpha you would see that this particular part that we see here I was shocked when I win it when I actually found that out I said this this must be incredibly and sure enough it is very is very common on Nissan and Infiniti Vehicles so as you can see on screen they say in SNSD a 509 a quad MOSFET chip this is a is what it is is for Fe T's or MOSFETs those are transistors into one that long chip that you see on screen we're going to explain to you what I did actually have the part so I said to myself well you know just just to just to see if it works and again we're gonna stress stresses in the video it is a temporary solution to the problem you could leave it permanent if You use different transistors but I only had the two one to seven thousand Fe T transistors so and that they're about two hundred milliamps transistors so anyhow we want to explain what we did here and how to go about fixing it and this could also serve as a template if you wanna if you don't have the partner you can't get the part for whatever reason maybe you see this video a couple years from now this part is no longer available you can do what we're doing in The individual you just have to use different transistors that take a little bit more heat so again seen here I did my own sketch for the circuit and this is exactly the same as you'd see on the datasheet in other words every electronic chip IC part has a datasheet the data sheet tells you exactly what the pinout is for the part lucky for me I there was a pin there was a datasheet available so I was able to Get it online so again as you can see pins number 1 through 10 it's a 10 pin IC that you just saw and each pin has a specific its it has a correspondent to the actual transistor the discrete transistors did when we say the screen we're talking about one single transistor one by one so we we rather than do you know do the chip with it for Fe T transistors and we interconnected them together as you see on screen this is my own sketch that I Did for the circuit as you can see the the IC has pins number 2 4 6 and 8 those are the gates for this particular Fe TS don't worry about what they mean because you really care what you know what you want to know it's how they are connected so you don't even have to know about electronics to do this job so again 2 4 6 & 8 are the gates 1 and 10 the pins in other words the holes are on the on the PC board the first one and the last one 1 and 10 are this source they're all Interconnected on the other through this but we can't do that because it's a transistors number there's this second third and fourth transistors we have gonna have to interconnect them outside so again pin number one the sword's is the actual pin the actual hole that we're going to solder the unit in and the other three we're gonna have to solder them outside and then we're gonna then connect it and solder them to the last pin which is pin number 10 and then Pin number 3 5 7 and 9 or the drain and so with that in mind and with the datasheet information that we just gather we'll get enough information to pretty much build this thing so I started by disconnecting or disassembly disordering d IC that you just saw before and then from there I went on to install the different and they remember therefore the same so you can't go wrong so for these transistors these things are Dime-a-dozen they're very cheap very inexpensive and so we just did it just again this is not a permanent solution if you want to do it in a permanent solution you can get the part you're gonna have to go with a little bit beefier transistor that you can see the PC board now the pin this is this is the pin number one mark so you don't get confused so you feel know where pin number one is almost every not almost every electronic component that has say A specific pin out we're not talking about resistors and stuff like that that those you don't care you can put it put on me either way so that mark that you see there that's pin number one so that's the starting point for our sketch that I did before so remember to tie all the source pins together because actually the three the last the last three the first one it's the source is connected right right on the whole that's interconnected if you Look under the PC board you'll you'll see that they're interconnected on there but this in order to get the sources those three sources are tied to the last pin which is pin number 10 so you're gonna have to tie them together open pretty much and then from there you that's it you're done once it's finished the third pin four transistors through two three and four are going to be lifted they're not going to be soldered to the PC board at each specific point Only at the end pin which is pin number 10 as you see on screen and pretty much you know this whatever you knowledge you're gaining in this video will probably be able he'll help you out especially years from now when this particular part is no longer available you can actually use for independent discrete Fe T transistors with a little bit of current flow so that you can anything probably half an amp will probably be okay I don't know exactly What the that I don't think it's gonna be half an amp is probably going to be enough even even an injector a regular old old-fashioned injector now the direct injectors with draw almost an amp so I don't think a Nayak is gonna is gonna draw more than an amp so again you know it's and remember you have what you have used a stepper motor so pretty much all you have to do is get four you know transistors that can take the heat probably half an amp 500 milliamps or an App it will probably be enough you'll be okay with that I hope this video somehow helps you out you know in uh in repair and ECU repair it maybe you are a technician oh you own the car whatever what have you so anyhow hope you enjoyed the video and thank you for watching this channel is for do-it-yourselfers as well as professional auto repair technicians we present all the content using the latest CG animation techniques on hands video and how-to tips and Techniques we encourage you to subscribe to this channel now once subscribed any time we upload a new automotive tip secret or technology video you will be notified finally by subscribing you will also be part of our weekly freebies yes we're constantly giving away lots of free merchandise automotive diagnostics and publishing Mandy concepción the owner of this channel is one of the most prolific auto Technology authors on the web at any moment in time we may offer a free book kindle ebook Android app one of our own diagnostic equipment or even auto repair software that runs on your PC follow now free of charge learn lots of automotive technology secrets and win free stuff it doesn't get any better than that thanks for watching and enjoy

Nissan Infinity Repair of the ECU IAC

 repair clusters and computers work you know abs or any computer truly I mean as soon as you start learning how to activate those devices is actually pretty familiar so I did a post on my Channel here on YouTube and I also promote these classes on Facebook this is gonna be the first part of I don't know how many and not all depends on you guys hopefully this creates a lot of more viewers and people that are interested on learning how to do electrical diagnosis because these that I will show you here will apply onto any vehicle that you work on it's not just like in this case I have a 1996 Toyota Tacoma same on the 4runners 22r engine Computer this was replaced like a year ago and I kept it to the test the problem on this one now that I have it here in my lab it was actually a capacitor they got you know exploded very common especially on these all computers but so coming back onto what I'm doing here and I want to share with you guys is I will start you know with the basics which is how to get a pin out how to connect to the computer how is safe for the computer it's not going to Be anything that will create a you know a harm to ourselves because it's low voltage but so we need to make sure that we get you know get technicians battery grounds and that's what we need to go and check for wire diagrams I also wanted to show a little bit of what I have here on my life and then we will go and proceed with the wire diagrams connections into the computer and then reverse engineering which is you know it's very Very hard to find a schematic for the internals on the computer lucky for us mechanic we have at least you know the outside which is you know sensors and actuators and believe it or not inside the computer is very similar in a very smaller way but it's the same thing we have inside a computer controller that is going to be receiving all those signals and then converting from an analog to digital like that we can you know seeing on a scanner in this Case this computer is a little old so it's not capable to communicate that much with the scanner so we only get you know codes but on you know 1996 and up you are able which I brought the computer I mean my scanner here because I got a four computer in here but I wasn't able to open it up because the bolts are too tight but so again let's focus on what we're doing let me talk a little bit on what we have and then we will start checking the Harness or sorry the wire diagram and the connections in here so let me take the camera and get you a little close to what we have here or what I have here so first of all this tool right here that's an engine and computer simulator with this one me actually stop one sec in the video so I can grab the phone alright so this is again his engine computer simulator it's pretty pretty neat I got this one coming from China obviously actually some people in some of the guys And Venezuela and Mexico they are actually doing some of these tools to sell you cannot you can do yourself also this is you know we have an right side of this tool we have a power source you can select five all those syllables and 24 volts we have this row right here for six injectors move this out of the way then we have ignition coils up to six secretion coils this will be ground and battery power We have also signals for chem sensors and cranks and a source on that side we have on this side we got solenoids and we also have in here sorry my des it's a little small and I will be moving over to a bigger house and then we're gonna have a little more room to work and it's not gonna be so tight as I'm working right now but it's okay so so we have at the time when I connect the injectors for simulation it will inject the signal to the computer so the Computer thinks that it has injectors working I can change on each injector the ejection timing same is for the coils so what we do here hopefully this is sometimes it's a little hard to to see because of the type of screen on there and believe me it's blue but I know it's not looking that way like there so we have number one sensors I can just click run and I have DC signals so I can have as you see here I got you know CTS coolant temperature sensor TPS Total position sensor a map a math and an o2 sensor as you can see now these ones are blinking so let me go on the first one which is the CTS look at the voltage I can adjust it here to 0 from 0 to 5 volts which is regular or more often where we will see on those type of sensors and then all I have to do is just connect one of these wires that I already have with four million millimeter banana adapters I have a whole bunch of harnesses that I've been Doing myself I have one in here that I have four two connectors that I can use for different computers and I can connect the scanner onto it so again it's pretty handy to have that you don't need to have that and I will show that in future videos this is just because it's pretty easy and I have to start doing with a Arduino boards which I will be showing that as I have one Arduino board ready to go here with all the connections and everything because I Will be fabricating with you guys on future videos again a tool to simulate signals so you can inject a square wave a sine wave or whatever we need to do the back the reverse engineering because when we're proceeding to you know find a way through the computer let's say you know in this case and I will probably show a little bit this tonight because I mean times it's always wrong really quick especially when you're trying to change information but you know I'm Going to inject the n.e signal which is coming on this vehicle from the igniter to the computer and then we can follow that pad backwards which will be an assert to go from the microchip or whatever we will have on this car the controller we will go from the connector internals to see you know what kind of resistors we have capacitors because we will have most likely you know filters which is capacitors and resistors that will go to ground and then you also have Protections that go in on the same pads like that is not going to grounds just like a resistor to you know to protect the signal so in case or any reason somebody puts 12 also it gets shorter the power or short it to ground it doesn't affect the computer but we will see that moving on on to the classes again hopefully you guys like the content and believe me it's a little hard I'm gonna be a little rusty sharing information in this type of way and you 

Know I'm an auto technician I used to be an instructor in Nigeria for those that don't know me I'm from Nigeria originally yeah which is a beautiful country I have a video that I did on one of my vacations like two years ago you can see that on my channel ok let's go back into the tools I have for myself I have a microscope this is a forgot the brand I bought these on it's an M scope I got all these from Aliexpress it's the easiest way to order self except for For that and then I have my satyr in which is micro pencils and I got hot Weezer's I got an ultrasonic cleaner which you will need to clean bores as like, in this case, I will show you in a second the capacitors got exploded on the bore luckily for this computer it wasn't that much 

of damage because it's a very acid liquid that comes out of there then I have solder in soccer because this one is good because you can do it you know with the Manual ones but that's super fast all right so we have here this is a signal generator from regal it's really good this is the DG 1022 Z it's very capable right now it's not connected because it shares the same type of connection so you know power wise on the back so whenever I need one I disconnect the other one otherwise it runs too many cables I have this sickling the SDM 3:05 five again from Amazon this is a bench tester And it has you know the capability to go into really accurate measurements for resistors because you know when I'm working I also repair 

laptops and phones you know since I have all this equipment you need to be very accurate remove the resistor some you know another resistor the capacitor is a measure good because sometimes it you know that can be the issue I have also had a recession this is from chronic really really good I recommend that 100% I had that for Life flat-four to five years, not a problem ever very powerful so that is the ex Roenick 4000 series that's a model for 0 what else we got here ok we got this is a fluke scope meter it's a very very powerful tool this one is a 200 megahertz with 2.5 we get samples per you know it can record I mean a tremendous amount of data I think it's up to 21 days of recorder that's what this record is in here and I also have a 4 channel one but I keep that one in the shop because these ones are super handy you know just 

turn it on is ready to go like let me show you one second like you know how is even a snap and you have to wait for that to build and then go on to you know let's get the scope side and connect the leads and all the stuff this one turned on ready to go and this one is it has a meter or a multimeter right so I can go and measure arms continuity dial temperature select what I want to Measure and then I have a two-channel oscilloscope you know channel a and channel B which I love in this one it's isolated inputs oh yeah isolated input so it's not a problem we feel reverse one sigh I'm gonna burn the scope and I know that on you know very careful when you're working into any of these electronics especially when you're using a power source I forgot to mention this one this is the power source that I Usually, use like in this case I'm 

connecting the computer this any computer with that power source that I like a lot because I can select either channel I'm using on this case channel two for this computer and I can go and change the voltage now it's off but you know I can go up to thirty-two bolts for a computer you know twelve point six that is a good voltage you can go even thirteen voltage now I'm going to affect anything and then I select the Amperage I usually go no more than a half an amp as you can see right there because if it's anything wrong in the computer that power source will not let go more than point four amps so if I have right now everything ready connected all the grounds and power so if I turn channel two on for that computer right here you will see that I had thirteen 13 volts but it's only drawing 11 amps sorry a hundred and ten 

milliamps is point zero 11 amps which are You know a very minimum consumption so the computer is not it's not bad even though that capacitor exploded and he's not there because I don't have it yet here remember capacitors are usually to filter the signals so it's not going to affect if it will affect the computer if he's shorter like in that case the capacitor was shorted to the ground so they pad from the 5 volts to the ground was shorted and I have created an issue the The reason, why you need an oscilloscope, is like in this case I'm going to eject the signal and I need to follow that pad to see if the signal reaches the destination which is the controller right so that's how I do the reverse engineering so I know that today is 

gonna be a lot of talking and not much on the classes I want to start doing these videos for like around 15 minutes at a time 15 to 20 minutes another piece of equipment that I like to use here is That camera the camera I can record and I can move that into here which that's what I will be showing you guys so this is what I see on the microscope and again I can go in and out the only thing I'm a little boom from here is usually I can see a lot more on on the microscope than where the actual camera is showing in here let me take that off the screen alright but the image as you can see it's a very capable camera I cannot Complain that's what they call I think it's a tree head microscope as you can see the camera is in here and I can see perfectly through any of these inside to work on the computer so the other thing that I do and I'm going to go a little over that I usually use either old data or identification I'm working on diagrams like this because 

as you can see you know I select if like, in this case, it's not that noticeable but if any of these paths Would cross to the second page of the third page if I selected one it will select it on all I then effects doesn't do that only all data so what I usually look at on the diagrams Toyota is pretty easy because remember in here I'm using coal red wire diagrams this is not the original this is a real righted diagram and it can have errors so you need to compare before you power as a computer or do something else let me turn the computer off before you do

 Something else make sure it's correct because I have been burned by a run cold I am that is telling me that something is one way and it's not so they'll always always check your diagrams so in here we have pin 1 it's clearly is showing B plus 1 and if I follow that path you know and then bn9 it's a white and red those are actually feeding power to the mass airflow both both of those wires so do I really need that one not probably much so maybe just this battery One because this water the number 2 pin to it comes from the engine compartment fuse box and it's hot all the times I have also an ignition switch in here a little hesitant to see that I don't have anything ignition wise but you know this is such an old computer I didn't see anything the said ignition like this IET and IEF those are actually signals that come from the igniter which is up top here so this is what I usually still you know Follow what I need in here and I'm gonna be wrong let me see one second here because sometimes I think on these all to euros they actually master flow it's actually not cool master flow is a volume air flow meter it has a hat of power to feed to the computer I'm coming right remembering that and I'm pretty sure is that yep I am pretty sure because if you see we have another day every relay which is powered by an ignition fuse yes yeah yeah that is Exactly what it is and that's why I selected it so if we see and I'm going to go over with you guys with that so we got this ignition fuse in here which goes right here and I can select a pad here so so this is the activation so we don't need that one we have another connection in here to that a hot all the time so as soon as this relay closes it will energize all these fats like select all those and we will know in a second that that is the same pad that I have in Here so when ignition is turned on this relays this relay they Fe relay will get energized close the contact and supply the power to the computer on on B plus and B plus one so those are technicians for those are familiar with Toyota you know that the other uses e4 grounds so we have e 0 1 e 1 and e 0 to all those are grounds there are flies if it would be on the car together on G 120 on the intake manifold and those are very prone to left loose Create a whole bunch region so on the computer so that's what I did so I go onto the computer and let me show you that and this is nice from Toyota so I'm relying on yes sending out the computer probably you guys will be able to see here but all these pins let me get something to point at so all these pins in here are actually labeled so we have bad bad one and if you see here it says zero one so let me show that into the camera try not to get too much of it Layer of the light but you see we have a 0 1 in E 0 2 so u 0 2 is the pin inside and easy Rho 1 is the pin outside and then we got an A 1 which is the paint inside under under this one so these are my three grams and if I go over to the order connector which are our powers as I think pin 1 and 2 and p9 but you can see it right here we got B 1 battery and then p9 is actually under this pin 1 and that's B 0 1 I think OB 0 2 what is standing there in the diagram B plus 1 And B plus so that's the order 1 so that's how you I get power onto a computer like this so again I have already selected to the end II signal and I can inject the signal in here on the crank I selected the pin in here the Syst crank so I'm going to put that in there right now I got no power to the computer but what I'm going to do so I'm going to go back here and I'm going to select rpm signal and then I can either inject on a square Waveform I can select a sine wave form knowing - you're coming from the the ignitor is a square waveform 0 to 5 volts so we need to make sure first that that is the correct waveform with before we injected the computer will have protection so even even though if you put a bigger square wave let's say you know zero to 12 the resistors and the capacitors inside the computer will diminish that signal as it goes inside to make sure that when it reaches the Controller is zero to five or zero to whatever that computer is using that's what we'll be drawing in there and we'll see that alright guys let me show you a little bit I think this video the first one is going to be a little longer than expected but it's gonna be the first class so I'm going to let it go yes for this one so let me show you that a square waveform on the scope so I'm going to set up the tripod one less thing also that I wanted one another Thing that I wanted to show you too is try to get yourself always I mean in this case for the classes I got a whiteboard but a notepad make sure that you write down your pins like this computer has only two connectors one is the 16 pins and the other one is a 26 pins so I'm connecting one with the 16 pins those are where the powers are so we got pin 1 which is an ignition ignition feed pin 2 which is battery which that's gonna keep alive the memory On the computer and then p9 which is an ordered ignition then we had the grounds on the second connector 26 pins the grounds are pin 13 26 and 26 sorry sorry 24 and 26 and then our any signal which is the one I'm going to do the reverse engineering going back to the controller is in pin 21 so the next thing that I wanted to show sorry for that switch your gears in there is that signal on the actual Scylla scope to make sure there's Something we can use on I got their scope pretty much ready to go I can show you what the readings are here I'm reading on channel B which is the one I'm going to use for the test this bolted ac/dc and that's it I can then change either the time or the voltage depending on the signal so I'm going to select hopefully you guys can see in there on a square waveform and that is actually happening right now so I'm going to i probe here First unlike this lead I mean they're made for to work in the computer in the ground it's always very small so let me move that waveform a little downward and let's put more voltage alright so yep too much I guess we need cursors to see that is actually high 12 volts so you see we have a 12 volt signal we had two cursors in there is reading me the low and the high so this is a 12 volt square wave that is still too big need a 5 volt so let me go back let's use 50 plus 1 Let's see what is gonna be there's also 12 volts one second guys let me find one that is 5 volts because we can I use it to a boat I want to show you guys on the actual box in here I think this one is called in 9,000 plus so I can select on a square wave as I was doing before and when I run it as you can see here we got blinking one in here and I also have a baby channel zero the nice thing about that is this channel 1 2 celery 0 1 & 2 can be adjust from 12 volts to zero so Let me show you that on the oscilloscope and now we can use that to actually bring the signal into the computer and I think I'm actually skipping a step very important you can do it either way the best way to do the tracking on the computer is to actually use just a regular multimeter I can use the scope I have a multimeter and a scope and I didn't show this before I want to show this now let me actually unplug the power like that I can show you but why Am I so tight this right here hopefully I can be reading in there so there are isolated inputs so this is the way I like it's like a floating round so it's not a dangerous scope either way I will always recommend to do a measurement on any computer with just one channel and if you're going to use 2 channels just make sure that you're using you know the powers and ground and respect that always negative on the negative and positive on the positive For the both channels especially because we're connecting to a tool that is coming from 110 grounds internally on those tools are all share so if you connect back or something it can create a sparks and that's what a lot of solo skills they are not floating grounds or isolated implants they get burned because people don't protect that don't realize and then it blows the the meter alright so right now I have data line connected so what I'm going to do see That in there I'm just going to plug these silly Gators are coming from that channel 0 just created any sparks swells in here so I'm going to put these stick together here and this one and here so as you can see I am having right now coming from channel 0 0 to 5 pretty much 2 to 5 I can scale that one by changing their voltage a little more when go away so if I'm if I move that one we can see more the actual waveform I'm going to move the now the cursors to the the top

Of that waveform is displaying 3 balls due to the fact we are now no longer withinside the sear on the lowest so we were given like a 512 I can extrude additionally the velocity to make you realize the rectangular waveform extra seen and now I'm going to alter the voltage simply via way of means of you realize transferring sufficient as you could see I can move down to love 0 volts so it really is the cut-off date and I can grow it all of the manner up to love 12 volts so however the quality factor now could be that I can position it proper wherein I want it Around 5 volts and this is best so now I can inject that waveform into that any pin that we've got already right here simply put off from right here allow me flip 

this one 2d so with them and in this field once more the 9000 plus I can extrude the Hertz of that sign so I could make it move slower or quicker as I please or as I want it these alligators are very very tight okay so for dad so what I do generally do with this those are so difficult to open harm there may be one 2d men Okay men I'm looking to position you as near as viable so that you men can see what I'm doing and we are able to see that at the at the laptop I suggest sorry at the display ensure that we're searching on the identical matters so positioned the floor on one of the grounds in right here and allow me untangle this cuz however the scope bleep very tangle it right here you gotta be cautious now the laptop is on is it now no 

longer on so all we've got proper now and this might be the exceptional manner to do it's miles I could be simply Injecting the sign so allow me circulate their digital digicam and the scope to wherein we are able to see the N e at the digital digicam so we are able to all see the identical I'll be pointing with my lead you will be seeing this and agree with me that is a totally small very small tip I suggest I can puncture my finger with this and it indicates us Oh bacon there properly allow's let's have a look at this so allow me flip the waveform on so allow's search for that any so and e come [Music] So difficult for me to look I can honestly see wherein it's miles I were given grounds in right here ought to I select out up IGF it is only a 

little less difficult to search for properly I suggest I can see the song coming right here after which right here quite positive it is proper there sure it's miles all proper so allow me alter this after I simply farfar from one is going a bit larger perhaps it is due to the fact it is off looking to appearance in on nowadays and the scope sorry men this is Something were given a bit special so I'm simply putting in place my cursors once more to ensure that I were given the proper voltage see this eleven bolts no I do not want a love on volts what's now what extrade I were given seven and a 1/2 of we are able to paintings with seven and a 1/2 of Shanta hurts if it is converting as you could see probable I'm now no longer positive 

how tons you could see however proper now the waveform is getting a smaller due to the fact I'm converting the herds of that sign proper now I'm In the fifty one Hertz and it is seven factor six volts so not anything incorrect with that however with any luck properly with my hand in there you men can see not anything proper so I all I did each time I circulate that mouse it receives withinside the manner so what I did is I observed from any that is proper right here this song down and I'm proper now on the primary resistor once more that is an antique laptop so those are nad floor mount resistors those are actual hollow and we are able to you realize in order To put off a resistor like this you need to saturate properly 

both manner you'll usually want to reply any of those resistors in capacitors however at the least it is now no longer a it is now no longer a floor mount okay so now if we move over to the opposite facet is a floor or it is going thru no it is going thru and it modified the sign so one factor that I need to expose you is after this resistor we are able to degree in a 2d the sign circulate a bit bit so Our backside went up a bit and that is simply once more it is a filtering method thru the sign all of the manner as much as regardless of the microchip or controller is receiving the sign occasionally is even they the energy supply or chip that gets the sign so allow me circulate the app or cursor right here so we're now on 6.eight they use a special 

cursor and wherein's my cause I should forestall the sign from transferring due to the fact I suppose that that is the exceptional manner for me to real positioned the Cursor so I'm setting the cursus Harvison sorry vertically so I can circulate one to the higher sign after which the subsequent one to the decrease a part of the sign like that I can see the 2 measurements although I move earlier than the resistor or after the resistors the lowest of the sign is a hundred thirty millivolt sorry me yeah now no longer sincerely that is giving me time and the opposite one hmm allow me see what might show up if I degree it at the identical 

one and I can try this yeah Just inform me time time and voltage so now I'm sorry men I'm gambling with the device as properly I simply need to inform me what the scale of the boat of the sure coming from one hundred millivolts 0-one hundred to 6.6 if we visit the opposite facet of that resistor wherein's the digital digicam now proper I'm over there I can nevertheless see right here however now you men proper do not forget we do not have the laptop on that is simply we're ejecting that sign right here so it is now no longer a hassle it is a bit blurry for you Guys proper I should make it a pointy so that you men can see withinside 

the TV higher so earlier than the resistor we were given seven factor six volts after the resistor we were given six factor proper yeah we were given six factor seven so once more that is a filtering method so we are able to now comply with that it is quite clean to look in this laptop due to the fact you realize it is uncovered so and records real route it were given broken a bit bit so let's have a look at if we were given usually right here or we are able to Still see the sign in right here and we do all proper so I could be setting this a laptop on there I were given a a unique device to keep the laptop so I can turn it round due to 

the fact as we are able to see right here now I visit this nut allow me positioned down at the laptop in this in there so we comply with the pod and now is going to this that those this is maximum probable gonna be on the opposite facet so it really is whilst occasionally you want to apply a continuity due to the fact you could positioned a

Multimeter lease from one side to the other one with the ejection of this signal it's pretty easy to I got some clusters that I'm working on in here the deep computer so this is the bracket that I was referring to hold computers so let's uh let me put this on and I'll be right back guys this is getting very long it's gonna be like a two-part video probably I guess I try to put that in there but it doesn't work it's too high for this setup that I have right now I Changed the lens of my um microscopes and that's what is a little too close but either way alright so another thing that you need to do when you're working in here are you doing ask what I'm doing right now let's try to write down the information as you go you know start designing your diagram so I usually put a box and I show you on the web ask for in a second so I put our box and I put you know pin 21 right yep in 21 and II I draw a line a resistor which is in this Case our 204 and let's see the value of the resistor so I'm going to switch to the meter just to measure that resistors to see what the value is so I gotta change two arms lapsim and let's turn the signal off for the meantime remember when you're checking persistence everything has to be off and that it says that it's a ninety 7.4 ohms ninety 7.4 ohms so let me write that down in there and that's what I'm just starting to draw gonna Have to do this right here so again I put our 204 and we said there is a ninety 7.4 arms right so let's call it 97 ohms forgive me with my letters are not the best but so you are shaking all that as you go and that's how you start doing your reverse engineering diagram so we can check the colors of that resistor and just to make sure that I can see the same in there it looks like gold Brown black that Brown I love the microscopes so cold and look like brown or black and another Brown and the camera is not adjusting the same colors of the camera are not exactly as I can see so much better believe me guys I'm trying to judge that for you that is perfect in there yep so we got a goal line kind of like brown on black and brown and again all you need to do is go online check the colors and see if we that is correct that will give us most Likely the percentage and values of that resistor will attire long day of work today and now trying to share these with you as being a little long material but it's also important so color resists or values color sister code can we get a chart 3-band that's a for band okay and I should have this resistor color code the calculator download yeah we have heretofore been in the five man ok perfect this is this is awesome and this is a four so we will have a brown then Black then another brain let's see if that is correct and so let me show you hopefully you guys can see this and you can see the the page of this one is Allah the vowed circuits that come so it's not Allah it's all about circuits that come all right so remember the gold is the value of all the tolerance of the resistors on this type of our sisters so we got you know our again brown black brown and then the gold as sitting there on our 204 and it tells us that it should be 100 ohms resistors we got ninety 7.4 it's a perfect so that resistor is good we got no issues with that and that's how you how I do it so I can pin these here which is what I will do my case you know say that calculator is very handy and I usually copy there's just in case you know something happened with this computer how will you mail that to myself but that's what I would do so we can leave This open I'll show you another tricks I have a for this surface mount capacitor so there is another really good book that I will show you it's online and you can use also for for your experiments and to do work like this in yeah these classes are going to be long a lot explanation again I'm not a teacher I haven't done this in many years so you have to be a little forgiving would be alright so we can Proceed on the other side of the of the board make sure I'm perfect yeah and I want to make sure that I am in the correct path so I'm now running the scope again I mean the signal I'm pretty sure is that yes hopefully you guys can see that right there so we had the the same signal I got no cursors because I don't really mean much in here but that's the same six point seven volts and now in order To see what we have in other side obviously we need to flip this carefully because remember we had this crown in here nothing else is being activated so it should be no problem to flip around and if we are correct I like to do figured I have to adjust this for you and for me well I can see very good myself you guys are not looking that good right well that's not so bad I was trying to look for that pin and the pin looks like it's in here no one just Poked on it and I got it the second try since it's the only signal that we are you know ejecting that's what we need to see so so we can see that we got here and now from this pin it goes onto this pin here we still got the same six point seven so now we have this the black thing on the other side let me flip this around so the signal is getting inside here so this is most likely our controller on this old Version and this can be a power source I don't know yet what is that because I mean this is no very old computer are we going from here to here later this can be the analog to digital converter and then my send it to one of these ships in here I don't know yet and we can eventually see that but that will be on the next part I'm a little tired hopefully you guys can see what I'm doing in here and this is this is what I do I mean it takes time sometimes is Easy I mean fine the first thing that I always recommend to do in any repair mechanically or electrically visual inspection I open this computer and I see a bad capacitor well obviously I'm going to replace that or remove it at least it's not shorted and then I can you know put the computer turn the computer on see if I have any 5 volts or you know which is usually what happens around in computer like that and I will show you guys that on the next class Leave the comments don't forget to subscribe you like this tell me what you think what I should change do you guys want to have an order camera on top of the computer which I had a GoPro and I can do that I can probably put you know our camera so you guys can see the overall what I'm doing which I think that with you know with this TV right here you guys can see really good in there but I mean that's what I think so let me know we used what you think I Mean let me know what you guys would like to see in the next class I will like to proceed with what we're seeing right now this is the any signal which is a very important is the cam signal coming from the igniter to the module for ignition and ejection and those are the test is sometimes you need to do an entire look like this sometimes you got a very good igniter and the distributor is working but the ie F or the IET signals don't Come back to the igniter so it's no ignition and a feel pump doesn't run so now you understand what I'm going to with this do we have a problem the car oh do we have a problem the computer and it's OCC is starting to do shakes do you really need to have a microscope like that well it's easier to do it with this you can have lenses like this they also sell you know this cheap microscopes there you can connect to the laptops and even to the phones and you can see Things like this it's not the fastest or the easiest way for to work in a bench but I mean you can do it you can definitely you don't need to have a hackle the Saturnian station that i have here is one of the best hackle is a very expensive tool but i know that it's going to last me many years because those are made forever so what i have in here is my choice you can look for a cheaper staff at least to start and you collect money for me this Is I love electronics I love to do diagnosis on the vehicles and this is like the next step I can with confidence tell the customer yes your computer is bad you need to spend $3,000 you need to spend 200 bucks whatever that computer my costs because sometimes you can find a used one then you can take parts and repair the computer is damaged if it's not a too strong of a damage or replace it right but at least you are confident or you can check is that signal with This way of procedure that I am showing you here is the signal reaching all the way in yes and then you can say okay well it'll be respect but again ten minutes let me stop it here we go the next class and again give me your thoughts post in the comments I'm going to put the link on Facebook and offer you guys like it I'm very excited to see what is going to be the coming out from here so see you next time okay guys

Misfires in the BMW MSD80 ECU are checked and fixed.

Multimeter lease from one side to the other one with the ejection of this signal it's pretty easy to I got some clusters that I'm working on in here the deep computer so this is the bracket that I was referring to hold computers so let's uh let me put this on and I'll be right back guys this is getting very long it's gonna be like a two-part video probably I guess I try to put that in there but it doesn't work it's too high for this setup that I have right now I Changed the lens of my um microscopes and that's what is a little too close but either way alright so another thing that you need to do when you're working in here are you doing ask what I'm doing right now let's try to write down the information as you go you know start designing your diagram so I usually put a box and I show you on the web ask for in a second so I put our box and I put you know pin 21 right yep in 21 and II I draw a line a resistor which is in this Case our 204 and let's see the value of the resistor so I'm going to switch to the meter just to measure that resistors to see what the value is so I gotta change two arms lapsim and let's turn the signal off for the meantime remember when you're checking persistence everything has to be off and that it says that it's a ninety 7.4 ohms ninety 7.4 ohms so let me write that down in there and that's what I'm just starting to draw gonna Have to do this right here so again I put our 204 and we said there is a ninety 7.4 arms right so let's call it 97 ohms forgive me with my letters are not the best but so you are shaking all that as you go and that's how you start doing your reverse engineering diagram so we can check the colors of that resistor and just to make sure that I can see the same in there it looks like gold Brown black that Brown I love the microscopes so cold and look like brown or black and another Brown and the camera is not adjusting the same colors of the camera are not exactly as I can see so much better believe me guys I'm trying to judge that for you that is perfect in there yep so we got a goal line kind of like brown on black and brown and again all you need to do is go online check the colors and see if we that is correct that will give us most Likely the percentage and values of that resistor will attire long day of work today and now trying to share these with you as being a little long material but it's also important so color resists or values color sister code can we get a chart 3-band that's a for band okay and I should have this resistor color code the calculator download yeah we have heretofore been in the five man ok perfect this is this is awesome and this is a four so we will have a brown then Black then another brain let's see if that is correct and so let me show you hopefully you guys can see this and you can see the the page of this one is Allah the vowed circuits that come so it's not Allah it's all about circuits that come all right so remember the gold is the value of all the tolerance of the resistors on this type of our sisters so we got you know our again brown black brown and then the gold as sitting there on our 204 and it tells us that it should be 100 ohms resistors we got ninety 7.4 it's a perfect so that resistor is good we got no issues with that and that's how you how I do it so I can pin these here which is what I will do my case you know say that calculator is very handy and I usually copy there's just in case you know something happened with this computer how will you mail that to myself but that's what I would do so we can leave This open I'll show you another tricks I have a for this surface mount capacitor so there is another really good book that I will show you it's online and you can use also for for your experiments and to do work like this in yeah these classes are going to be long a lot explanation again I'm not a teacher I haven't done this in many years so you have to be a little forgiving would be alright so we can Proceed on the other side of the of the board make sure I'm perfect yeah and I want to make sure that I am in the correct path so I'm now running the scope again I mean the signal I'm pretty sure is that yes hopefully you guys can see that right there so we had the the same signal I got no cursors because I don't really mean much in here but that's the same six point seven volts and now in order To see what we have in other side obviously we need to flip this carefully because remember we had this crown in here nothing else is being activated so it should be no problem to flip around and if we are correct I like to do figured I have to adjust this for you and for me well I can see very good myself you guys are not looking that good right well that's not so bad I was trying to look for that pin and the pin looks like it's in here no one just Poked on it and I got it the second try since it's the only signal that we are you know ejecting that's what we need to see so so we can see that we got here and now from this pin it goes onto this pin here we still got the same six point seven so now we have this the black thing on the other side let me flip this around so the signal is getting inside here so this is most likely our controller on this old Version and this can be a power source I don't know yet what is that because I mean this is no very old computer are we going from here to here later this can be the analog to digital converter and then my send it to one of these ships in here I don't know yet and we can eventually see that but that will be on the next part I'm a little tired hopefully you guys can see what I'm doing in here and this is this is what I do I mean it takes time sometimes is Easy I mean fine the first thing that I always recommend to do in any repair mechanically or electrically visual inspection I open this computer and I see a bad capacitor well obviously I'm going to replace that or remove it at least it's not shorted and then I can you know put the computer turn the computer on see if I have any 5 volts or you know which is usually what happens around in computer like that and I will show you guys that on the next class Leave the comments don't forget to subscribe you like this tell me what you think what I should change do you guys want to have an order camera on top of the computer which I had a GoPro and I can do that I can probably put you know our camera so you guys can see the overall what I'm doing which I think that with you know with this TV right here you guys can see really good in there but I mean that's what I think so let me know we used what you think I Mean let me know what you guys would like to see in the next class I will like to proceed with what we're seeing right now this is the any signal which is a very important is the cam signal coming from the igniter to the module for ignition and ejection and those are the test is sometimes you need to do an entire look like this sometimes you got a very good igniter and the distributor is working but the ie F or the IET signals don't Come back to the igniter so it's no ignition and a feel pump doesn't run so now you understand what I'm going to with this do we have a problem the car oh do we have a problem the computer and it's OCC is starting to do shakes do you really need to have a microscope like that well it's easier to do it with this you can have lenses like this they also sell you know this cheap microscopes there you can connect to the laptops and even to the phones and you can see Things like this it's not the fastest or the easiest way for to work in a bench but I mean you can do it you can definitely you don't need to have a hackle the Saturnian station that i have here is one of the best hackle is a very expensive tool but i know that it's going to last me many years because those are made forever so what i have in here is my choice you can look for a cheaper staff at least to start and you collect money for me this Is I love electronics I love to do diagnosis on the vehicles and this is like the next step I can with confidence tell the customer yes your computer is bad you need to spend $3,000 you need to spend 200 bucks whatever that computer my costs because sometimes you can find a used one then you can take parts and repair the computer is damaged if it's not a too strong of a damage or replace it right but at least you are confident or you can check is that signal with
  

siemens msd80 eu so right here are ignition coil drivers you could see the six areas one 3 4 5 six this unique one is a 4 cylinder one so those right here are the most effective drivers which can be being used The one right here with an exxon that is a preceding terrible one i have simply soldered him on there simply to expose you what a terrible one looks as if i have examined this every person of our 4 drivers right here they may be high-quality no problems so uh that is not the difficulty with this unique eu however simply to expose you what you are looking out for that is what you do so that you meet it you place him onto diode check Get your probes black at the lower back and study your measurements 1.33 0.fifty five subsequent one black at the lower back 1.33 0.fifty five 1.33 0.fifty five 1.33 0.fifty five you could additionally move among every man or woman leg and turn them round the alternative manner if you want and simply undergo and represent them and simply test out for some thing that Stands out um the primary aspect to do is simply test that they may be all sort of appearing the equal now right here's our terrible one not anything taking place there and a useless brief and once more not anything taking place among the ones not anything takes place in the ones and that is basically it um you could get maintain of those drivers in case you want them from rs additives uh it is an irf644b And yeah quite clean to get maintain of there may be a piece of a ache to unsolder those pads under they may be used there for form of moving thermal warmness away so is probably an concept to reduce the legs off um you could unsolder the legs one at a time then get a soldering iron in throw an excellent little bit of solder onto the lower back of those tabs have your iron on a first rate temperature i simply maintain maintain on there till the solder Gives under you have some of these patches there under um and of direction the the board right here is designed to eliminate as a good deal warmness as viable so that you want to throw a variety of warmness lower back in to unsolder it however after you get it out um specially with those legs off as quickly as you begin to see it flow seize the aspect up with a couple of tweezers pull him away Job performed switch him over with the brand new one and that ought to be your eu repaired easy as that an additional aspect to recall is that this unique diode check has a tendency to paintings at the msd 80. this became the sooner layout bmw later converting to msd81 in case you do ever have a defective eu and also you purchase a brand new one it's far going to be the msd eighty one version Like this the msd81 is comparable at the interior however we've got our drivers now stacked over right here those drivers once they do fail they do not display the equal problems so sadly this right here is um this here is a specifically terrible eu this one does not hearthplace any coils however we are able to see the whole lot so there we move black at the lower back uh not anything not anything Really taking place right here in any respect factor seven factor six factor seven factor six factor seven factor six in this one factor seven factor six sadly this one right here does have problems however you cannot locate it out thru the um the diode check with the drivers i will must appearance in and try to discover what precisely goes on with those ones Most probable someplace similarly down the road it is now no longer those chips that is terrible it is whatever's controlling them so that is the subsequent aspect to do see if we are able to discern out what they may be however there we move that is your one of a kind eu's msd80 constantly test out for those drivers replaceable if wanted msd81 sadly a one of a kind problem takes place with the ones You