 Earl Glant, shop foreman here at Township Chevrolet for another edition of Tech Talk. We're going to touch base on Tech 2 Diagnostics, so anyone who's been in here before with any vehicle and had a check engine light come on, if you look on your bill or on your slip you get from the girls out front, you'll see on there one of the lines might be Tech 2 Diagnostics. So that means you've come in here with a check engine light on or another light on ABS light, airbag light, whatever. Something that requires our scan tool to hook up to read a code from and you're going to get it repaired. Now, if it's a deal where it's customer pay, let's say you're flipping the bill, your car no longer has warranty on it or you bring it here and it's a non-GM vehicle, what we do with our Tech 2 basically is it's $79 and that's going to allow us to hook our scan tool up, the technician do, road test the vehicle, hook the scan tool up, read the codes off the vehicle, find out what the codes are, kind of prioritize them in a list if there's more than one to what we should look at fixing first. Check for bulletins and recalls that may be related to that trouble code or diagnostic trouble code, which is DTC, so if you hear me say that during the video that's what that is. And it's about roughly a half hour of the text time and then by that point we should have a better idea of what we're going to be into to make the repair and then that'd be where the advisor would come in and speak with you as a customer and say, listen, this is what the technician has found, this is the direction they're headed in and this is what we need to do and then you can decide whether you want to keep going with the diagnostics or maybe you're lucky and at that point we've already found out what the problem is. Sometimes we pull a code, there's a related bulletin or something to it or sometimes the DTCs are very precise and will lead the technician to exactly what the problem is. Unfortunately a lot of times it doesn't, so I'm just going to give you a quick overview on what we're doing today and what we do with the TEC-2 diagnostics so that way when we say that to you and you're kind of sitting in the waiting area wanting to hear yourself, I wonder what's going on with my vehicle up there, you kind of get a better idea. So I've already started this one here, customer pulled in the drive-through with this truck, they've got a check engine light on, they've already discussed with the advisor and the drive-through person out front that there's no drivability concerns with this, meaning other than the light being on the driver wouldn't have any idea, the customer would have any idea that there was a problem with the vehicle. So I've gone for a road test to confirm that there's nothing else I can feel because I kind of maybe look at things as a total and overview, maybe it's something that the customers miss. So I've gone for a drive to make sure there is no drivability concerns, make sure there's no other lights are on the dash that may be related, that maybe the customer or the advisor never discussed with me which there's not. So all we've got on this vehicle is check engine light with no drivability. So my next step because of the year of the vehicle, we have three scan tools here, we have our older scan tool which does basically our 2012 and older and then we have our newer scan tool which does 2012 and up and that's for our GM stuff. We also have a launch which is our aftermarket scan tool which allows us to work on every other make and model besides that. So this here is our GM one, this is the newest one. The vehicle I'm working on today is an 18 so obviously I'm using the new one. So this is wireless and this, the older scan tools used to have the buttons with the screen on them. What we do with this, we hook this up and this wires wirelessly connects to to my laptop. So I'm going to go ahead, I'll take you around the vehicle show you where this thing hooks up and kind of show you how we get this going and then we'll go to the computer and I'll show it we find. So here we are in the customer's vehicle, the first thing you're going to do is turn the key on, we have to put power to all the modules to wake them all up so that way this can communicate with it and underneath every vehicle OBD2 which means basically 1996 and newer, it doesn't matter what type of vehicle it is in sold in North America has to have an OBD2 connector which is shaped like this here and it's usually underneath the steering column and that's where it's supposed to be. Some of the odd vehicles have them on the passenger side under the dash but for the most part it's underneath the dash here, under the steering column area. You plug the scan tool in, you can obviously it's lit up, check mark says we're good to go. I'm just going to set this on the dash of the vehicle and we'll go around to the computer and I'll show you what we pick up. Okay, so now we're back at the computer. The first thing we're going to do is we're going to start a program we have called GDS. This is going to be our diagnostic. So when I click this, it's going to come up, there's different scan tools in the shop, they all have their own serial number. We're going to select the one we have in this vehicle and we're going to connect to it and it's going to come up just to verify. It's going to be it's a GMC Sierra, it's the year of the vehicle working on and I'm going to go ahead and press enter and that's going to get us in there. I can do one of two things, we can either scan each module individually. I know there's an issue with the engine computer or PCM because the engine lights on or possibly the transmission computer. What I like to do is as I go through and do a complete vehicle scan. So it'll tell me if there's any other issues with this vehicle other than that and sometimes you could have a problem with a brake control module that could cause an issue with an engine module. So it's going to go ahead and ask me a few questions about what the vehicle is equipped with. So I'm going to answer those and then it's going to do a vehicle scan module by module. It'll tell me how many their DTCs or Diodon's or Trouble Codes are in that particular module and it will tell me if they're passed and there's none. So if you see there's the list of all the computers in this car. So you can see there's quite a large list. Each one of those is a computer. All those computers talk to each other. So this is where things get a little complicated. So the one I'm concerned with right now if I hit details here it's going to bring this and just take it from a number and it's actually going to lay it out to me in the code description. So there's three modules that have codes and there's three codes. The only one that's current right now is the engine control module. So that would explain why the lights on. So if you look here this is the DTC it's a P0442 which means a small leak in the evap system. So what I would do at this point I'm going to open up my information which is SI. This is a program we have from GM to find out what we need to on a vehicle. I'm going to go ahead and put in the particulars of this of this truck. And then what I can actually do is once I get into the service manual I can actually put in that code that we've got the P0442 and I can search that. And if there was any bulletins or an issue that GM was aware of it would come up here and it would give me bulletins and then it would tell me how to make those repairs. So it's looking to save the technician time and it's also looking to save the customer time as well. So if there's been 150 people with with that concern in their vehicle and it's been the same problem every time well GM tracks all that information and they'll put a bulletin out to let us know. So when yours comes in instead of us going through all the diagnostics to make you wait to get your vehicle back we can just go right to that particular spot in the truck or car and find it if that's what the issue is. So there's no bulletins on this vehicle. This is under warranty so it's not a customer pay scenario. We'll still go and update the customer to let them know what's going on. So it gives me the different engine options here and then I'll click on that and you can see it's there's your P0442 and there's quite a quite a list here that's going to explain what sets the code what the code means possible causes. So there's quite a lot of information the tech has to go through. So this is where it would get into a bit more time. So we would go to you at this point. We let you know this one here this vehicle is got the small leak. So the next step I would do is hook up our smoke machine which fills the evap system full of smoke and basically it's as easy as it sounds. I just look for smoke. I use the scanner to close all the valves off fill the system with smoke and then I just look for smoke and if I see find the smoke leaking from a particular component where they be a gas cap or a filler neck or one of the valves and we replace that part and then we'd retest again to make sure it's done. So just kind of a quick rundown and exactly of how how it works. There's kind of a myth out there that computer will tell you everything you need to know. All it does is basically send us in the general direction and then we have to take it from there and go a little further. So I hope this helps ease your mind on when you hear that diagnostic time required and and you're not really sure what's going on with your vehicle out here. Every vehicle goes through the same steps. Obviously it's a little different depending on the code and how many codes and all that stuff. But for the most part it's pretty much all the same. So any questions on this just drop it in the comments in the video. Any more suggestions on videos let me know and we look forward to seeing you guys. Thanks.