Good CAN Bus, Astro Meter , OTC break out box
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- Опубликовано: 27 июн 2019
- Quick check of a known good CAN Bus.
handsonautotraining.com/
Here you see the Astro Meter that I have been using exclusively for the past 6 months, its a great meter for the price. The OTC DLC break out box is pretty sweet as well.
Having some questions about tools that I use, and I want to show how quick and easy to test the CAN bus so I made this.
This was on a 2016 Ford Fiesta 
Авто/Мото
very interesting got a brake out box a while ago and I have now learned a few new tricks to diagnose better and build a known good library of the cars I come across
Nice set of tools Brian.
The meter is a cheap one, the break out box is not absolutely necessary ( I have been getting by with out one until a month ago LOL) I am trying to show that you dont need a $300 meter to test things.
Funny thing is that I bought that meter from amazon about a month ago because of you,lol...
Especially cause it has that nice big screen and is just as good as the expensive ones.
I have 3 of them that I use for hands on training, 1 for me personally. No problems so far, I have sold 4 to techs and no complaints yet
That OTC box looks great, but it is over 3 times more expensive than generic breakout boxes on Amazon. The led on each pin and system voltmeter are not present in generic boxes, but I'm gonna guess they aren't necessary to do the task. It looks like the OTC box is fused as well, though with care and understanding that may be unnecessary....
That is correct, OTC box is more expensive. I am looking at other brands on amazon to purchase a few for the classes that I instruct. FYI the activity LED's can be misleading, just because they light up / blink does not guarantee the circuit is operating properly (IE the CAN bus LED's will blink when the bus is at 8 volts and sloppy signal) .
Great video Brian, digging that's cheap DVOM from Amazon.
Thanks! Here we go into the holiday week, Flip a coin busy or not ?
As I go through your play list I see you have quite a few videos using the breakout box. I have one from AESwave but the OTC one seems to have a few more features. Thanks Brian ❤️
I am not aware of the differences, one thing for sure is the data activity led's will light up even if the signal is bad sometimes. So in my opinion I dont trust them. That's why I use the scope to verify, my pico was on bench at home working on another video project .
Brian thank for the great feedback. I will continue to go through your play list.👍
If you keep watching I hope dont get bored! I make the videos to show any one interested the process and systems. And as you will see very similar. I want to teach people that there are many ways and paths we can take, and developing a strategy of their own is priceless.
thank u Brian Mann from mexicali mexico. (next to calexico ca.)
Nice !
👍👍 nice job
I'd love to have one of those breakout boxes but as a DIYer I can't justify it yet. Thanks!
What is the problem make it yourself? There are a few cables, a few banana plugs female, an odb2 cable with the male adapter and a female odb2 plug. The leds and power display is optional because hey, you have a multimeter at hand.
Thanks Brian Mann, Do you know what these baud rates are used for 500K, 250K, 125K? Every car has a gateway circuit board that all the modules connect to. The gateway circuit board converts the CAN signals into SAE J1850 signals, ISO9141 signals and ILS signals. How does this gateway circuit board work or what does it do? I'm not sure what SAEJ1850 signals and ISO9141 signals are used for and have you used them to troubleshoot car issues?
Got a breakout box. Haven't taken out of the box yet.
Nice ! I am sure you will be glad that you have it.
👍 👍
Thanks, any reasons why a short in a car it called a Parasitic drain, what is parasitic in the car?
Any unwanted current draw from the battery is considered a parasitic drain, draw , or load. Generally speaking aprox 50mA or more is bad.
Great video have a ? On the ground side doe’s the color change if the sensor ground or the chassis ground have high resistance
The less will not light If a ground is not present, now the question is how "bad" can the ground be and still have a green light!?
Yes thanks, do you know why they call it a parasitic, what is parasitic is it the car wiring or load?
The unwanted / or non engineered current draw is the "parasitic" load. The load that is unwanted is the "parasite"
BRIAN MANN, When measuring a CAN High and Low signals how can you tell if its CAN buss 2.0A, CAN buss 2.0B or CAN FD? how do you know what to set the Baud Rate to when you don't know what CAN signal you have? If you want to Upgrade from CAN 2.0A or B to CAN FD, all you have to do is replace all the CAN 2.0A or B transceiver chips and replace them all with CAN FD transceiver chips? the CAN buss harness and CAN modules can stay the same only replace the CAN transceiver chips
Bill it sounds like you are on a different level than I am have not yet replaced any CAN transiever chips, I have toyed with some ideas of playing with CAN chips and arduino boards.
Normally cars parasitic drain is 50mA, but where or what is causing this 50mA of parasitic drain? the cars is turned off it should be zero i would think not 50mA
It's ok just asking, what scanning tool brand name and model do you use to verity each CAN module?
I have the oe stuff ford gm Chrysler but autel is great for the $$ too.
BRIAN MANN,
.. can you give examples of using the Breakout box Pin#1 thur Pin#15, what kind of common failures you have seen when troubleshooting cars using Pin#1 thur Pin#15?
That is an idea. The most common faults I see are on 1 , 2 , 3 , 6, 11, 14, and ground problems between 4&5, and blown fuses for no B+ @ 16.
@@BrianMann216 thanks for the help
1.)can you give examples of when you would be using PIN#1,2,3,6,11,14 thur PIN#15 to troubleshoot what kind of car issues and failures please?
2.) Like what kind of car failures and issues have you seen on PINS# 1,2,3,6,11,14? give examples please to learn from?
@@BrianMann216 thank for the help
** I disconnected the Temperature sending unit/temp sense, so How can I test the instrumentation temp gauge in my cars dash board by itself to check if its working correctly, what do I need to do?
Won't own an expensive meter. I'll buy a $25 one and when it burns up, oh well. I got good at electrical working for a Caddy dealer in the mid 90's and you just don't need a fancy one except if you want to do hertz but other than that, eh. I'd use a free one from Harbor Freight but they just quit working HA HA HA
Working at a Cadillac dealer in the mid 90's you had to be good at electrical, I did some time at Caddy dealer '99 - '01 , I dont miss the northstar wrist pin recall LOL
Do u think its worth the 200 $ price tag?
It is not cheap that is for sure. I do not have the lesser expensive units to compare to. I am going to purchase a cheaper version soon for a class that I am instructing and let you know. The one thing that I wish they did with the data bus activity would be to make It so the indicators do no light unless withing a " normal " voltage range. I have had can activity lights blinking when bus was way high and the high voltage was issue. Now that I said that it is up to us to understand what good in bed is so having a breakout Box allows us to probe into the DLC. The quality of the otc unit feels good will let you all know when I get the cheaper version.
@@BrianMann216 Thanks a lot for such an elaborate answer
Care to explain why you see voltage from ground to can BUS high side for voltage drop??? You show and state it but don’t explain why you have the readings you do! In order to be a good teacher you need to be able to explain why you get the readings that you get! Not just say what you expect to see and call it good