Reply
 
Thread Tools Display Modes
Old 08-08-2013, 12:26 PM   #21
Senior Member
 
NV245's Avatar
 
Join Date: Jun 2013
Location: Carmel, In
Posts: 175
Before you purchase a linking device, better check your coach for the proper connector. My 2008 does not have an OBDII connection, it has 2 round connectors, one under the dash, one at the rear under the "hood". The Freightliner display gives the temperature info the same as a readout box would.
__________________

__________________
NV245 is offline   Reply With Quote
Old 08-08-2013, 03:27 PM   #22
Senior Member
 
I-RV's Avatar
 
Join Date: Jun 2013
Location: Mount Laurel, NJ
Posts: 1,022
Quote:
Originally Posted by NV245 View Post
Before you purchase a linking device, better check your coach for the proper connector. My 2008 does not have an OBDII connection, it has 2 round connectors, one under the dash, one at the rear under the "hood". The Freightliner display gives the temperature info the same as a readout box would.
I have a Berkshire 390BH-40. Can anyone explain what and where the OBD2 connectors is? Thank's
__________________

__________________
Gale & Hank- 2012 Berkshire 390BH
I-RV is offline   Reply With Quote
Old 08-08-2013, 05:05 PM   #23
Senior Member
 
NV245's Avatar
 
Join Date: Jun 2013
Location: Carmel, In
Posts: 175
OBDII refers to On Board Diagnostics, second generation, where the Environmental Protection Agency (EPA) required automotive manufacturers to provide emission control checks to be run for proving emission devices are working. It also required a universal connector so that aftermarket scanners could connect to the powertrain controller, making it possible for one scan tool to be used for diagnosis/monitoring. Apparently, the legislation did not include heavy truck (Freightliner Custom Chassis) so Freightliner/Cummins probably does not have an OBDII connector. I don't know how the Mercedes connector is configured.
__________________
NV245 is offline   Reply With Quote
Old 08-09-2013, 07:11 PM   #24
Senior Member
 
kingwood390bh's Avatar
 
Join Date: Nov 2011
Posts: 270
Well, I got back from my 4000 plus mile trip out west. My rapid temperature rise came climbing Big Bear in California. Lots of switch backs and steep climbs. I had the Allison 3000 in normal drive and the overdrive was kicking in. I was alarmed at the rate of rise (and fall) of my temp guage. My take away from the experience was that I should gear down and slow down while on extended climbs. I never pushed the unit to the point of overheating. Just by backing off the throttle and slowing down brought the guage back down in seconds. The book is very specific that you should "never" shut the engine down.
My guardrail damage came from too tight a right turn on a very tight switchback. I didn't even notice when I hit it. My wife was following and watched in horror. I was sooooo close to missing that darn thing!!
Will
__________________
kingwood390bh is offline   Reply With Quote
Old 08-09-2013, 07:37 PM   #25
Senior Member
 
tmmar's Avatar
 
Join Date: Apr 2008
Location: Long Island (Nassau County), NY
Posts: 4,258
There is a computer port in the back of the coach where the radiator is located. It is a round port that is brown in color ( I believe). Not sure if it OBDII or not but that is where Freightliner connected to when they did some maintenance on my coach.
__________________
Tom and Margaret
2014 Berkshire 390bh-60

tmmar is offline   Reply With Quote
Old 08-09-2013, 08:07 PM   #26
Senior Member
 
NV245's Avatar
 
Join Date: Jun 2013
Location: Carmel, In
Posts: 175
You may want to set your Freightliner info center to engine temp. After rereading your original post, I wonder if your thermostat is opening too early and showing the 1/4 temperature on "light" load, and actually getting to operating temp under load. If the Freightliner info center shows below 190 degrees, you may want to consider a thermostat change.
__________________
NV245 is offline   Reply With Quote
Old 08-09-2013, 11:31 PM   #27
Senior Member
 
RKC02's Avatar
 
Join Date: May 2013
Location: Sussex County, NJ
Posts: 219
As far as I know, diesel pushers (Freightliner at least), do not use an OBDII connector. Ours is called a Deutsch diagnostic plug and is either 9 pin (J1939 - newer models-approx 2004 and up) or 6 pin (J1708/J1587 for pre 2004). I don't know of one but maybe there is an adapter from OBDII to Deutsch.(?). There are diagnostic devices/readers but they are expensive.
** I got this info from the Silverleafelectronics.com site
__________________
2014 390RB-60 "The Shire"
RKC02 is offline   Reply With Quote
Old 08-16-2013, 06:40 PM   #28
Member
 
Join Date: Mar 2010
Location: Colorado
Posts: 99
I was having the same problem with my 2011 390BH. We traveled from Colorado to California and on the steep hills leaving Nevada our temp climbed and set off the alarm for extreme engine temp. We pulled over and it came right down to normal. I figured out that every time I pulled a hill I could not go over 2,000 RPM if I did the temp would start to rise. I made it back with no problems and then a few weeks ago it started doing it again when pulling hills I could not rev the engine over 2,000 RPM or it would get real hot fast. I took the motor home into Cummins and they told me it was a fan of some sort and I would have to take it over to Freightliner to have the fan replaced since they were not an authorized Freightliner repair shop.

They said the fan would come on at high RPMs but then cut out occasionally> I will let you know what the fan is called once I pick my motor home up next week from Freightliner.
__________________
csichoice is offline   Reply With Quote
Old 08-16-2013, 06:55 PM   #29
Senior Member
 
ernest917's Avatar
 
Join Date: Jun 2011
Location: Woodville, Texas
Posts: 1,713
Just curious - did you manually downshift to a much lower gear OR did you just let the transmission do it ???

I'm asking because I just returned from a month in the mts of MT, WY, UT and CO..... I manually downshifted before I started the climb and then downshifted to one gear lower than I used to climb when I started the descent.... I'm talking 8, 9 and 10% grades.... I never overheated a single time.... Took my time and kept my speed around 40-45 climbing and 20-25 coming down....

Obviously that's all a moot point if you have a defective fan....
__________________
ernest917 is offline   Reply With Quote
Old 08-16-2013, 07:09 PM   #30
Member
 
Join Date: Mar 2010
Location: Colorado
Posts: 99
I just let the transmission do the work. Freightliner said the fan was only working at half speed when it did work. they said it would not effect the motor home as much when traveling at highway speeds on flat land since I would have a lot of air going through the engine area but on climbs you are going much slower with less air and that is when the fan comes into play.
__________________

__________________
csichoice is offline   Reply With Quote
Reply

Tags
mount

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 09:36 PM.