 |
|
02-15-2025, 07:49 PM
|
#1
|
|
Senior Member
Join Date: Jul 2011
Posts: 624
|
ECM squeal
My 2015 Aspire has developed a new noise. It seems like it's coming from the engine control module which is located under the coach and basically under the driver's feet. This is a constant squeal that is best described as a cooling fan with bad bearings...the squeal begins immediately with turning the ignition key on and doesn't require the engine to be started.
Has anyone run into this?
Is there a fan on the ECM?
Thanks!
John
2015 Aspire 44b
|
|
|
 |
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
|
02-15-2025, 09:09 PM
|
#2
|
|
Senior Member
Newmar Owners Club Entegra Owners Club
Join Date: Dec 2015
Posts: 2,070
|
Not sure what you are hearing but the Engine Control Module (ECM) is mounted on the engine in the rear of the coach on the passenger side. It does not contain any moving parts at all.
Whatever you are hearing is not the ECM. Can you post a photo of what you are referring to?
__________________
2021 Entegra Aspire 44W
Previous: 2006 Newmar Essex 4508
2013 Tiffin Allegro Open Road
|
|
|
|
|
02-15-2025, 09:39 PM
|
#3
|
|
Senior Member
Join Date: Apr 2024
Location: WI Driftlesser
Posts: 2,822
|
I've never seen an ECM with a fan, but it's possible an electronic component is making the noise, also possible that it's an intentional alarm, but I'd think that would be inside the cab. Have you unplugged the ECM to see if the noise still comes on?
__________________
"Bringing third world electrical work to first world luxury." RV makers of Murica!
|
|
|
|
|
02-15-2025, 10:49 PM
|
#4
|
|
Senior Member
Join Date: Mar 2024
Location: Bohemia NY
Posts: 2,625
|
Possible it is the dash heat/AC fan?
__________________
Dennis
Bohemia NY
2008 Nimbus 342 SE Carlyle 
|
|
|
|
|
02-16-2025, 04:50 AM
|
#5
|
|
Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: Lincoln, NE
Posts: 1,474
|
The Spartan Control Module is up there in the generator compartment. I don't believe it has a fan though.
Later...
Ray
|
|
|
|
02-16-2025, 06:29 AM
|
#6
|
|
Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: East Greenwich, RI
Posts: 2,549
|
Quote:
Originally Posted by RayandWendy
The Spartan Control Module is up there in the generator compartment. I don't believe it has a fan though.
Later...
Ray
|
It does, at least mine does. Standard box fan, probably 12v unit.
Photo:
https://photos.app.goo.gl/ucSeGqB2c6AujzvK8
|
|
|
|
|
02-16-2025, 06:35 AM
|
#7
|
|
Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: Lincoln, NE
Posts: 1,474
|
There's a module up near the drivers side headlights mounted on the frame. I thought that was the SCM,
Later...
Ray
__________________
Ray & Wendy
Full-time
2014 Anthem 42RBQ - 2018 Jeep Wrangler - FMCA F521969
|
|
|
|
|
02-16-2025, 09:51 AM
|
#8
|
|
Senior Member
Join Date: Jul 2011
Posts: 624
|
Ray...
Yep, that's the module that the sound seems to be from.
Sorry I mistook the engine control module for the Spartan Control Module.
I will be home today and hopefully able to get under there and find the source tomorrow.
I don't think I can take many more drive days of the constant squeal!
John
2015 Aspire 44b
__________________
John,Vicki and Lexi Lou
2015 Aspire 44b
2018 F150 toad
|
|
|
|
|
02-16-2025, 09:58 AM
|
#9
|
|
Senior Member
Join Date: Jul 2011
Posts: 624
|
Volt doc...
Is the module you referenced the ECM?
Mine also has the muffin fan on it but I've pretty much ruled out the front run bay as the source of the sound.
I'll know more tomorrow
John
2015 Aspire 44b
__________________
John,Vicki and Lexi Lou
2015 Aspire 44b
2018 F150 toad
|
|
|
|
|
02-16-2025, 06:09 PM
|
#10
|
|
Senior Member
Entegra Owners Club
Join Date: Oct 2010
Location: East Greenwich, RI
Posts: 2,549
|
Quote:
Originally Posted by jmorse1
Volt doc...
Is the module you referenced the ECM?
Mine also has the muffin fan on it but I've pretty much ruled out the front run bay as the source of the sound.
I'll know more tomorrow
2015 Aspire 44b
|
John, no, it's basically a box of fuses and relays. I always thought it was what was called the Spartan Controller (or something like that) and the ECM is the finned unit outside. But now I'm not clear on the semantics.
https://photos.app.goo.gl/hep3vwuCwLU3ZPPm9
|
|
|
|
|
02-16-2025, 06:38 PM
|
#11
|
|
Senior Member
Newmar Owners Club Entegra Owners Club
Join Date: Dec 2015
Posts: 2,070
|
I wonder if what you guys are seeing might be the box called the BCM (Body Control Module)? My understanding is that the BCM is the centralized interface between various controls/switches and the actual motors/relays/etc like electric seats, wipers, lights.
There are also TCM (Transmission Control Modules), ABS controller and probably even more.
This is only what I turned up with some internet searches. I do not claim to be any sort of actual knowledge about this stuff. But it doesn’t really help with the original issue So Caveat Emptor.
__________________
2021 Entegra Aspire 44W
Previous: 2006 Newmar Essex 4508
2013 Tiffin Allegro Open Road
|
|
|
|
|
02-17-2025, 04:57 AM
|
#12
|
|
Senior Member
Entegra Owners Club
Join Date: Apr 2007
Location: SW FL
Posts: 32,884
|
The ECM is back on the Cummins engine, get one wet driving in heavy rain and it will be a trip to Cummins. Don't ask me how I know.  That was reason #1 I stopped driving in heavy rain.
__________________
Chuck in SW FL
Digital 2021 Cornerstone "B"
A "Digital" 2019 Cornerstone "B" Traded
A "Classic" 2014 Anthem 42 RBQ---Sold
|
|
|
|
|
02-17-2025, 11:06 AM
|
#13
|
|
Senior Member
Entegra Owners Club
Join Date: Jun 2004
Location: Bayfield, Ontario
Posts: 5,608
|
Quote:
Originally Posted by voltdoc
John, no, it's basically a box of fuses and relays. I always thought it was what was called the Spartan Controller (or something like that) and the ECM is the finned unit outside. But now I'm not clear on the semantics.
https://photos.app.goo.gl/hep3vwuCwLU3ZPPm9 |
Spartan calls it the “Spartan control module”.
__________________
Don & Gerri
2014 Entegra Anthem 44B
2014 Honda CRV Touring
1300W Solar, 1200AH LiFePO4 FMCA F443497
|
|
|
|
|
02-17-2025, 02:10 PM
|
#14
|
|
Senior Member
Join Date: Jul 2011
Posts: 624
|
Whoa boy!
It's good to see I'm not the only one that can't name the parts!....
Here's an update on my squeal
It turn out not to be from any of the modules at all!
After twisting myself into a shape that any gymnast would envy, I discovered the noise is from the dash A/C fan . Now to figure out how to access the fan itself. From the inside? From the generator bay?
It's gonna be tight either way!
John
2015 Aspire 44b
__________________
John,Vicki and Lexi Lou
2015 Aspire 44b
2018 F150 toad
|
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
 Linear Mode
|
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 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
