Mark_F
MotoIQ Prodigy
Send PM
Posts:270
 |
| 08-01-2011 10:57 AM |
|
Which CAN codes are those? |
|
|
|
|
B-rad
MotoIQ Newb
Send PM
Posts:53
|
| 08-02-2011 09:33 AM |
|
U1000 "is related to missing CAN communications on the network."
U1001 "is for ECM and related to missing CAN communication on the network"
They are fairly generic CAN codes that leave you with little to go off of. Basicly there is a communication breakdown somewhere and thats all you get to know.... NOW... Figure out whats wrong... Oh, and it's warranty... |
|
|
|
|
Mark_F
MotoIQ Prodigy
Send PM
Posts:270
|
| 08-02-2011 11:49 AM |
|
I would get a CANalyzer. Whenever we really want to trouble shoot what is going on a CANbus, we pop the canalyzer and find out what the truth is. It helps to show whether or not the packets are being Txed or Rxed.
It is also extremely useful to reverse engineer a CAN stream decode that someone or some organization has not released the information for. |
|
|
|
|
B-rad
MotoIQ Newb
Send PM
Posts:53
|
| 08-03-2011 08:27 AM |
|
Whoa. Sounds like you know a bit more than me on the CAN sys. All I get is Consult-II or Consult-III for diag. The manual tells you where the terminating resistors are, so there is that. But as far knowing which unit or sensor is pulling the sys. down, Nissan doesn't give us much to go on.
Never heard of a canalyzer or Txed or Rxed. and what are packets? And reverse engineer a CAN stream decode????
We got off topic here... Service writers that SUCK at their job and try to roll you under the bus so they don't look as bad piss me off |
|
|
|
|
Mark_F
MotoIQ Prodigy
Send PM
Posts:270
|
| 08-03-2011 10:17 AM |
|
I am not sure what the Consult-II or Consult-III would refer to as most of my background is limited towards CAN streams outside of the OEM market. I find that if termination is not done correctly in my applications, that you will get nothing on that particular leg of the CAN bus.
TX and RX are just abbreviations for Transmit and Receive. I reference that because sometimes the fault lies in the receiver of the message, sometimes in the transmitter of the message, sometimes because the bus is overloaded, and sometimes because the wiring or equivalent is at fault.
Without a canalyzer, if you are seeing a fault, you may try taking out a particular unit placing a termination resistor at the CAN Hi/CAN Lo lines and then seeing if the fault still occurs. Then you can start limiting it down to subsystems and working out from there.
My lack of OE CAN systems may not help as much, but the basics behind CAN are the same, just that OEs are not forthcoming with their CAN streams most of the time and it makes it frustrating.
As for reverse-engineering, it can be done by hooking up to the stream and watching or logging the CAN stream realtime and noting which sensors you moved. Example - watch the CAN stream while engine off, but the ignition in Run mode and you should be able to just move a throttle pedal potentiometer and see the corresponding value change. (usually a redundant system with 2 x pedal sensors). Now, if it is a CAN based throttle body, then you will probably see a corresponding signal sent to the TB and then you will also see the dual throttle sensors in the TB change accordingly as well. So, then you can disconnect one of those and see which one's value corresponds in the CAN stream. At this same time, you should be able to count on a failure bit status channel to indicate that the pedal values do not match each other. If you start decoding those, well troubleshooting based upon bit status channels really helps out.
Anyways, that is just an example. Easier things like a coolant temperature sensor or unplugging each sensor should make that easier. This is how I have had to work with some competitors systems. Not the typical way to go, but when someone will not give you something, this is many times what someone will do or attempt to do to figure it out.
BACK TO THE TOPIC:
People who still are employed and doing things in motorsports that really should be doing anything but that. |
|
|
|
|
Toms
MotoIQ Newb
Send PM
Posts:52
|
| 08-04-2011 10:32 PM |
|
To add to the topic:
The insane prices people are charging for janky S13 rustbuckets.
|
|
|
|
|
B-rad
MotoIQ Newb
Send PM
Posts:53
|
| 08-05-2011 08:01 AM |
|
Mark_F. Damn that sounds deep man. I like it. You should be helping Mega Squirt sort out their CAN programming issues. Nissan doesn't allow us to see any data transfer. All we get to know is what particular systems are communicating. So if a particular control unit doesn't show up on system call, you have a direction to go in but if theres a sensor issue (which as far as I know the Infinity Intellegent Cruise Control sonar sensor is the only sensor that communicates through CAN lines), which won't show on system call anyway, you have no way of knowing. I had an M45 w/ ICC and the sonar sensor put every control unit into failsafe and blacked out the gauge cluster. I could pull up all my control units in data monitor and would only receive some info in certain control units. There is no component inspection except for the two terminationg resistors which were the ECM and the Combination Meter (gauge cluster). Ultimately tech line told me to unplugg units one at a time and turn the key on and see if the car comes back to life. This proceedure is a big no no or so I was taught. Unplugged the ICC sonar sensor and like magic everything was on board... Oh, except cruise control obviously.
Back to topic yet again:
People who don't give enough of a crap about what they're doing to figure out or learn how to do it right. There's a difference between being ignorant and just not giving a sh**. If you don't no what your doing, just leave it the f*** alone. And Whoppers (chocolate coverd malted milk balls). Well they don't piss me off, I just don't like em. |
|
|
|
|
Toms
MotoIQ Newb
Send PM
Posts:52
|
| 08-05-2011 12:42 PM |
|
Posted By carmo on 08-05-2011 10:01 AM
Back to topic yet again:
People who don't give enough of a crap about what they're doing to figure out or learn how to do it right. There's a difference between being ignorant and just not giving a sh**. If you don't no what your doing, just leave it the f*** alone. And Whoppers (chocolate coverd malted milk balls). Well they don't piss me off, I just don't like em.
EXACTLY!
That goes well with the topic of things that annoy you.
Just got done browsing several forums looking for laughs and a finding few well informed and not so well informed fellas.
What I found hilarious was that a few random ass people (probably furniture salesmen by day) that can vouch for a guys statement about an ideal alignment settings saying 'camber adjustment on a lowered car is not needed' yet have no factual evidence supporting to their statement...sounds fishy...
It is very important to understand how stuff like suspension works first and why it is designed that way from the factory.
__________________________
Off topic:
Just got done reading Datruth's whole blog.
Damessenjah is my hero! Not sure what happened to that blog, I do love the entertaining read. |
|
|
|
|
Toms
MotoIQ Newb
Send PM
Posts:52
|
| 08-14-2011 01:34 PM |
|
10% annoying, but 90% funny. Not sure if the guy was serious. 
http://forums.nwp4life.com/zerothread?id=27522 |
|
|
|
|
Dusty_Duster
MotoIQ Engineer
Send PM
Posts:340
Maryland, USA
|
| 08-15-2011 07:14 AM |
|
Not realizing until your last run that you forgot to disable traction/stability control during the entire event. |
|
|
|
|
smartbomb
MotoIQ Super Genius
Send PM
Posts:1940
|
| 08-19-2011 08:57 PM |
|
 A lot of people in the EJ Civic comments section.
|
|
|
|
|
pistonhead
MotoIQ Newb
Send PM
Posts:78
|
| 08-20-2011 05:37 AM |
|
You know Mike, I was planning on coming in here and saying "people who try to look like they know more about suspension than Mike Kojima". I see you've done that already with fewer words. |
|
|
|
|
Dusty_Duster
MotoIQ Engineer
Send PM
Posts:340
Maryland, USA
|
| 08-23-2011 08:35 AM |
|
Posted By SixCylinders on 08-20-2011 07:37 AM
You know Mike, I was planning on coming in here and saying "people who try to look like they know more about suspension than Mike Kojima". I see you've done that already with fewer words.
That made me laugh pretty hard.  |
|
|
|
|
Toms
MotoIQ Newb
Send PM
Posts:52
|
| 09-19-2011 03:32 PM |
|
Worn, glazed rotors. 
|
|
|
|
|
GCMBob
MotoIQ ASE Certified
Send PM
Posts:424
Cayman Islands
|
| 09-20-2011 09:29 AM |
|
dealerships that take over 6 weeks to get brake rotors. |
|
|
|
|
74pepper
MotoIQ Newb
Send PM
Posts:1
|
| 09-20-2011 09:47 AM |
|
Things that annoy me. . . Using the wrong tool for the wrong job.
If you ain't got it, go get it. It's easier and safer than the alternative.
A valve wrench isn't what is sounds like. |
|
|
|
|
smartbomb
MotoIQ Super Genius
Send PM
Posts:1940
|
| 09-23-2011 09:04 PM |
|
People who pick apart tech articles we write lately to an annoying degree, like they are trying to prove that they are smarter than us. Being the best in the industry isn't good enough for them... Generally people who are smarter than us don't try to get an audience in the comments section. To all of you out there, I suggest you start your own site and I will come and annoy you! |
|
|
|
|
Toms
MotoIQ Newb
Send PM
Posts:52
|
| 09-23-2011 10:52 PM |
|
Posted By Mike Kojima on 09-23-2011 11:04 PM
People who pick apart tech articles we write lately to an annoying degree, like they are trying to prove that they are smarter than us. Being the best in the industry isn't good enough for them... Generally people who are smarter than us don't try to get an audience in the comments section. To all of you out there, I suggest you start your won site and I will come and annoy you!
LOL...
I knew you were going to come here after I reread the commentary. |
|
|
|
|
Doctor Bruce
MotoIQ Master
Send PM
Posts:135
|
| 09-23-2011 11:09 PM |
|
Don't even get me started on people, BUT since people were brought up I'll give you two that really annoy me.
1) The kind of people who come to my place of work for my Professional opinion/analysis and then could give a Rat's behind about one point because, although I have hundreds of pages of scientific data to support my point, they read 'something' on the internet.
2) People who go around looking to be offended. It seems like most 'uncomfortable' debates on Motoiq start with someone who's offended by one small or missed deta |
|
|
|
|
smartbomb
MotoIQ Super Genius
Send PM
Posts:1940
|
| 09-24-2011 12:15 AM |
|
Dr Bruce where is your office? My Dentist that I have been going to all my life just retired.
I am like WTF is up with people now days? The misuse of FEA is like WTF? Like JE is misusing FEA because we didn't show the entire inputting section? What sort of gap in logic is that? Did we misuse FEA when we don't even use FEA in the production of MotoIQ? I just don't understand how someone can get indignant about something like a picture of FEA.
Racecar Engineering doesn't show all of the data input when they show FEA and CFD output as well. Maybe they need to be told whats up. |
|
|
|
|