|
|
05-31-2019, 09:53 PM
|
#1
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Packed & ready to pull out and then.....
after 20 minutes or so of engine idling, solid check engine light comes on. Engine temp appears normal.
Half an hour later the Onan dies. One A/C unit was the only draw and I let it rest for awhile and when restarted it ran for 5 minutes and died again. The dash switch repeated 3 blinks. Does the dash switch offer other codes or do I have to use the switch that's on the gen itself?
Both were serviced at Oasis 3 weeks & 40 miles ago - fuel / oil filters etc.
|
|
|
05-31-2019, 10:16 PM
|
#3
|
Junior Member
Join Date: Dec 2016
Posts: 7
|
Packed & ready to pull out and then.....
The switch for the Onan will display fault codes:
6.2 Fault Codes
The generator set control contains extensive diagnostics to detect shutdown faults. Following a fault shutdown, the control indicates the fault code by flashing the numeric code on the status indicator in the control switch.
Determine the fault code as follows:
• 1 flash indicates a high engine coolant temperature.
• 2 flashes indicates a low oil pressure fault (Code 2 fault).
• 3 flashes indicates a service fault (Code 3 fault).
Press STOP/PRIME on the control switch once to have the 2-digit service fault code flash.
The 2-digit code consists of two sets of flashes. The first set is of flashes represents the 10s digit of the code. After a brief pause, the second digit of the code flashes representing the unit digit of the code. This is followed by a long pause before repeating the flashing of the fault code.
For example, Fault Code 36 appears as: blink-blink-blink—pause—blink-blink-blink- blink-blink-blink—long pause—repeat
Press STOP/PRIME to stop flashing the fault code.
|
|
|
05-31-2019, 10:47 PM
|
#4
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
I couldn't get a code using the dash switch but did get code 36 using the one on the gen. Can't be fuel level, there's 75 gal there. Air filter should be good, only about 50 hours on it but I'll check in the AM. Thanks.
|
|
|
05-31-2019, 10:57 PM
|
#5
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
You can check some engine codes via the LBCU on the dash
BTW, I have read that it may display an error code for idling the engine too long. I believe freightliner recommends no more than 10 minutes idling.
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
05-31-2019, 11:31 PM
|
#6
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
I've looked at the LBCU instructions a dozen times & get the parts except for how to get to the diagnostics section but I'm going to look again at my print out chart. Maybe it is the idle time although I drove about 1/2 mile before parking it (more stuff to load) and during that time the light did not go out. Can't say I got up enough speed. Test drive in the AM. Thanks.
|
|
|
06-01-2019, 12:04 AM
|
#7
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
Also read that 3 cycles of the engine will turn off the excessive idle display. Don't know if it's all true.
I'll see if I can help get you started on the diagnostics in the next post. It'll be from memory,
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
06-01-2019, 12:11 AM
|
#8
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
1. Turn on key, engine off.
2. Toggle joystick left to turn off Checklist display.
3. Hold joystick right for more than 5 seconds.
4. Scroll down to diagnostics.
5. Toggle right to enter diagnostics.
That's about all I remember so I hope it gets you started.
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
06-01-2019, 12:13 AM
|
#9
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Thanks for your help Dan. I'll give it a try in the morning.
|
|
|
06-01-2019, 06:49 AM
|
#10
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Engine Fault 1 of 1
SPN 3031 FMI 2 OC 1
Now I have to find out what that means.
|
|
|
06-01-2019, 09:11 AM
|
#11
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
This link may or may not help. I have read that the 1st thing to do is check all the connectors around the def tank.
https://www.justanswer.com/medium-an...mi-2-2013.html
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
06-01-2019, 01:26 PM
|
#12
|
Senior Member
Join Date: Jan 2017
Posts: 3,290
|
generally that 'alert', with the outline of an engine, is NOT engine related, but rather EMISSIONS related, and nothing to do with your engine.
Mine came on recently, and I didn't skip a beat while driving back another 200 miles to home, then not worrying about it - it's happened on more than a few occasions before and it was either a Nox sensor on the exhaust, replaced by Cummins, or a DEF quality issue, that then went away on it's own after some time.
as for the Onan generator shutting off, the two are not related, but the generator sometimes will have these symptoms after either the generator has been serviced, where the fuel in the fill tube was replaced with air, or the fuel tank for the coach dipped below 1/4 tank, causing the same issue.
I have this issue from time to time, but it's no biggy... just restart the generator, hold the switch for a few seconds even after it has cranked, and you should be good to go. You may even have to do this several times.
__________________
The Turners...
'07 Rockwood Signature Ultralight...
two Campers and two Electric cars : )
|
|
|
06-01-2019, 10:06 PM
|
#13
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Quote:
Originally Posted by dan-nickie
|
That article agrees w/ what Cummins tech told me via phone, “def fluid temperature sensor sees that the tank temp is too high or too low for ambient.”
I’ve run for about 7 hours w/o a problem (light still on). Don’t know if the 10 hours referred to in the link resets after cold stop or if I only have a couple of hours left.
|
|
|
06-01-2019, 10:18 PM
|
#14
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Quote:
Originally Posted by formerFR
generally that 'alert', with the outline of an engine, is NOT engine related, but rather EMISSIONS related, and nothing to do with your engine.
Mine came on recently, and I didn't skip a beat while driving back another 200 miles to home, then not worrying about it - it's happened on more than a few occasions before and it was either a Nox sensor on the exhaust, replaced by Cummins, or a DEF quality issue, that then went away on it's own after some time.
as for the Onan generator shutting off, the two are not related, but the generator sometimes will have these symptoms after either the generator has been serviced, where the fuel in the fill tube was replaced with air, or the fuel tank for the coach dipped below 1/4 tank, causing the same issue.
I have this issue from time to time, but it's no biggy... just restart the generator, hold the switch for a few seconds even after it has cranked, and you should be good to go. You may even have to do this several times.
|
Yes,I’m hoping it will go away'!
I’ve tried to start the gen probably 20 times in about 8 hours and the fault code is pretty generic...air filter, fuel tank too low etc. interestingly I was told today similar to your comment that these symptoms seem to act up soon after service. I’ll keep trying to start but I’m thinking that fuel filter replacement is next.
|
|
|
06-02-2019, 08:13 PM
|
#15
|
Dragonship Captain
Join Date: Oct 2016
Location: Eastern PA, USA
Posts: 1,335
|
There's a discussion on the DEF code here:
Spn 3031 fmi 2 - iRV2 Forums
Not sure how helpful it is. Did remind me that Emissions warrantees are frequently longer than drivetrain.
My next call would be to the FL hotline.
__________________
2020 RAM 3500 DRW Long Horn. In the hunt for a Palomino TC, formerly a 2017 Berkshire 38A: https://dragonship.blog/
|
|
|
06-03-2019, 08:55 PM
|
#16
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
Onan back on line. Oasis service 3 weeks ago installed fuel filter backwards. Ugh!
Engine light? Have to get back on that.
|
|
|
06-03-2019, 09:06 PM
|
#17
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
OMG. The main reason I prefer to do my own maintenance when possible.
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
06-03-2019, 09:07 PM
|
#18
|
Dragonship Captain
Join Date: Oct 2016
Location: Eastern PA, USA
Posts: 1,335
|
Quote:
Originally Posted by dan-nickie
OMG. The main reason I prefer to do my own maintenance when possible.
|
This.
__________________
2020 RAM 3500 DRW Long Horn. In the hunt for a Palomino TC, formerly a 2017 Berkshire 38A: https://dragonship.blog/
|
|
|
06-07-2019, 08:38 PM
|
#19
|
Senior Member
Join Date: Mar 2017
Posts: 116
|
And on the 6th day.... and 1200 miles later, the check engine light went out. One tech said it took x amount of re-starts. Another said restarts only after not running for 8 hours. I think it has more to do with phases of the moon. At any rate both my problems have resolved. Thanks to all.
|
|
|
06-08-2019, 06:15 PM
|
#20
|
Senior Member
Join Date: Feb 2014
Location: Dallas TX
Posts: 1,675
|
Good deal. Have you checkef the LBCU to see if amy codes are still in there?
__________________
Dan
2014 Berkshire 390RB-60
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|