Snapon Diagnostics Product Forums Diagnostic Home . Diagnostic Product Index . Customer Care        
Diagnostic SoftwareDiagnostic PlatformsAsk-a-Tech, Automotive Repair InformationTech Central
Go Back   Snapon Diagnostics Product Forums > Snap-on Diagnostic Products > Diagnostic Platforms > Verus User Forum
Home Today's Posts Register Members List FAQ
Thank you for visiting Snap-on Diagnostics Product Forums.
You are currently NOT logged in to a registered account. Some functions of Snap-on Diagnostics Product Forums will not be available to you if your are not logged in as a registered member. For a limited time only, registrationto Snap-on Diagnostics Product Forums to Snap-on Diagnostics Product Forums is !! FREE !! Select the    **REGISTER NOW**    link to register for your FREE Snap-on Diagnostics Product Forums account!!

Reply
 
Thread Tools Display Modes
  #1  
Old 07-07-2020, 08:22 AM
Corvette Rick Corvette Rick is offline
Junior Member
 
Join Date: Jul 2020
Location: Fairbanks, Alaska
Posts: 8
Corvette Rick Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default Evap Service Bay Test Question

I have a Verus Edge current subscription and im working with a 2012 Corvette that had the battery reset. Unless im missing something i cannot get the evap test to work because of the conditions it requires. To get the proper temp (under 158 degrees) the car has to sit for awhile. Because it sits for awhile it requires you to drive it 20 minutes and 10 miles. Well once you do that your over the temp. You let the car sit to cool down and by the time it does it wants you to drive the miles and 20 minutes again. Its a frustrating endless loop that doesnt allow me to do the test. Am i doing something wrong here or does anyone have any tips ?
Reply With Quote
  #2  
Old 07-07-2020, 10:21 AM
Joe Rappa's Avatar
Joe Rappa Joe Rappa is offline
Snap-on DSD
 
Join Date: Aug 2007
Location: North Carolina
Posts: 1,902
Joe Rappa Made it to level 2!  Looks like you are on your way to becoming famous

Default

The 156F requirement is just to get the test started. If it's booting you out, there must be something else going out of bounds. What, specifically is happening? That'll help us get you through it.
Joe
__________________
"You don't build a reputation on what you're going to do"
Henry Ford
Reply With Quote
  #3  
Old 07-07-2020, 12:12 PM
Corvette Rick Corvette Rick is offline
Junior Member
 
Join Date: Jul 2020
Location: Fairbanks, Alaska
Posts: 8
Corvette Rick Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default

Ill try it again when i leave work to put the miles and time on the car for the test. If the engine is under the 158, it will tell me to rev the engine. It will then fail and tell me the reason is it hasnt met the drive time of 19:58 seconds and 10 miles or somewhere in there. My problem is I've done the driving, and then when i exit out to run the test again, it now tells me the car is too hot. When you let the car cool down and go back into it its a repeat of before, the drive time and mileage arent met. It doesnt make any sense. It requires both, but one causes the other to fail in and endless loop. I get the car will run the tests on its own but seems like this test to save time is only a tease. The service manual doesnt say anything regarding this only to follow the tools instructions. I even have a Tech 2 and it doesn't give me the fail reason like the snap on does, so ive stuck with the snap on.
Reply With Quote
  #4  
Old 07-07-2020, 12:38 PM
Joe Rappa's Avatar
Joe Rappa Joe Rappa is offline
Snap-on DSD
 
Join Date: Aug 2007
Location: North Carolina
Posts: 1,902
Joe Rappa Made it to level 2!  Looks like you are on your way to becoming famous

Default

I don't know if you've ever run the test, and it can be tricky. So I'll kinda spell it out here in case that's the trouble.

With the engine under 160F or so, the EVAP Monitor needs to read incomplete, and the fuel between 15% and 85% command the service bay test.
It will tell you to rev the engine and give you a specific RPM. Don't worry about holding it at exactly that number. Just keep it at high idle.
After 10 minutes it tell you the idle conditions have been met. Agree to whatever the scanner says on screen. Drop it in gear and go for a ride.
After 10 minutes and 10 miles it says the drive portion is complete, and to stop the car. You don't need to stop right there. Those are minimum drive times. Get back to your shop, agree to the scanner again and then shut the key off. In under 30 minutes or so the KOEO portion completes and the scanner gives gives you results.

Joe
__________________
"You don't build a reputation on what you're going to do"
Henry Ford
Reply With Quote
  #5  
Old 07-07-2020, 01:29 PM
Corvette Rick Corvette Rick is offline
Junior Member
 
Join Date: Jul 2020
Location: Fairbanks, Alaska
Posts: 8
Corvette Rick Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default

Thanks for the quick replies. The problem im having is i never get past the start and idle stage. Ill start the car and idle it, and itll basically fail within 5 seconds and tell me i didnt meet the drive time and distance requirement. I guess what im saying is i cant ever get past that part because it requires 20 minutes driving and 10 miles and the low temp. Its actually impossible to meet both of those conditions at the same time so the test fails from the drive part or wont even let me start it because of the temp. I dont know if its specific to the LS3 corvettes or GM, or if im just totally missing something. But i cant get it to do anything past the first time it tells you to idle it between 1800-2000, it always fails because of the drive time and distance as the reason. Suggestions? I can provide screen shots if that would help.

Last edited by Corvette Rick; 07-07-2020 at 02:43 PM..
Reply With Quote
  #6  
Old 07-07-2020, 05:47 PM
Corvette Rick Corvette Rick is offline
Junior Member
 
Join Date: Jul 2020
Location: Fairbanks, Alaska
Posts: 8
Corvette Rick Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default Screenshot

This is what happens. I start the test it immediately tly fails. Tells me I need to run the car for 20 minutes and ten miles in the reason. Thereís no way to redo the test without exiting out. When you do it resets the timer so you lose any time and mileage gained. Then your temps are too high. So you can see itís literally impossible to run this test the way itís programmed. Any thoughts or does it just not work for this car ?
Attached Images
File Type: jpeg 543910AB-C43F-4007-B12B-AA2064B3E5DF.jpeg (152.3 KB, 34 views)
Reply With Quote
  #7  
Old 07-07-2020, 08:52 PM
Joe Rappa's Avatar
Joe Rappa Joe Rappa is offline
Snap-on DSD
 
Join Date: Aug 2007
Location: North Carolina
Posts: 1,902
Joe Rappa Made it to level 2!  Looks like you are on your way to becoming famous

Default

If it fails immediately the only PID you need to look at is the EVAP Test Abort Reason. The other ones don't mean anything until that part of the test runs.
Are you certain the Monitor hasn't already set? That's a common problem.
Your other qualifiers look good, but that's one thing you can't see on this screen.
Joe
__________________
"You don't build a reputation on what you're going to do"
Henry Ford
Reply With Quote
  #8  
Old 07-07-2020, 09:00 PM
Corvette Rick Corvette Rick is offline
Junior Member
 
Join Date: Jul 2020
Location: Fairbanks, Alaska
Posts: 8
Corvette Rick Congratulations!  Your peers have given you enough reputation to put you into the fist level!

Default

Before I ran it I checked and it was the only test marked as not complete in grey from a general scan. When the monitor is already complete the scan tool will tell you and not even let you get into the test. I remember this when I tried it on this car before the battery reset. I donít think Iíve missed anything but it just doesnít appear this works for this car. Not sure if thereís anything else we can even try at this point, outside of finding a gm mechanic or corvette tech whose a familiar with this situation. Any other suggestions or Do you have other company resources we can use to find a solution ?
Reply With Quote
  #9  
Old 07-08-2020, 03:52 AM
Crusty Crusty is online now
Senior Member
 
Join Date: Dec 2007
Location: Great White North
Posts: 2,440
Crusty You made it!  You've done a great job ofearning reputation from your peers.  You now have secret access to a new hidden forum!

Default

Some of the EVAP tests will only allow a test to be done once or twice IN A 17 HOUR TIME PERIOD.
That means let it sit for over 17 hours.
Also even though the EVAP is the only monitor set as incomplete, SOME of the EVAP self tests may have run already and could be fudging the Service Bay Test.
Do a code clear so it has a clean slate to start with for the Service Bay Test. (some service information will tell us this depending on the vehicle).
That is a PITA because it then means all the other monitors have to start over again.
Are you trying to get the monitors to set or were there codes stored before all this started-?
Personally I like to use the Purge & Seal test to see if the system is functional in the first place. Once I know the system is capable of sealing and staying sealed, then it's just a matter of letting the darned thing complete the Key Off Natural Vacuum test on it's own.
LOOK at the data for the EVAP while it's doing the Engine Off Natural Vacuum self test. It's boring as hell to sit there looking at pids for 3 or 4 minutes waiting for it to start but if it's quiet, you can hear the Purge and Vent solenoids activate when it does start.
You'll know it's starting the EONV test if the scanner keeps communication when you turn the key off.
Sometimes the EONV portion will only take2 or 3 minutes before it decides to power down (No Communication will show on the scanner). Sometimes it's taken 45 minutes to complete, and we don't have any way of knowing when or what the ECM was seeing when it decides to shut down.
This means saving a movie every minute or so to capture what was going on because once it shuts down, the scanner buffer clears itself as soon as it sees the No Communication screen.
It dumps the data buffer so we can't see what the ECM was either happy with, or unhappy with, when it decides to stop the self test and shut down.
Dumping the data buffer is a PITA. They COULD set the data to stay there in the scanner and pick up where it left off when the key is turned on again to restore communication, but they've ignored my request for this for years.
If the data was till there, and we restored communication, we could simply restore Comm and then save a movie so we could see what was going on, but alas.
Reply With Quote
  #10  
Old 07-08-2020, 06:47 AM
Crusty Crusty is online now
Senior Member
 
Join Date: Dec 2007
Location: Great White North
Posts: 2,440
Crusty You made it!  You've done a great job ofearning reputation from your peers.  You now have secret access to a new hidden forum!

Default

I just looked up one of the three engines available for a 2012 Vette.
It states in the Service bay test that the start up coolant must be below 95-F (35C).
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -7. The time now is 05:34 PM.


Reminder: Your participation in these areas of the site is solely at your own risk. The
information is only the opinion of the poster, is no substitute for your own research,
and should not be relied upon for business critical decisions or any other purpose.
Never assume that you are anonymous and cannot be identified by your posts.
We reserve the right to discontinue any users' use of any such public forum
for any reason. Please read the Terms of Service.

Snap-on is a trademark, registered in the United States and other countries, of Snap-on Incorporated. Other marks are marks of their respective holders.
©2009 Snap-on Incorporated. All rights reserved.