Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 09-14-2011, 11:32 AM   #1
Junior Member
Join Date: Jul 2008
Posts: 17
ABS Issues - 98 FDS

I apologize in advance for the long winded question and my limited knowledge of RV systems.

I have a 98 36 foot FDS Alpine that is being serviced. Part of the service was to determine why my ABS light will not go off. Based on an ohm (?) test, the service technician found one of the rear ABS sensors to be defective and another one to be questionable. My extended warranty provider approved replacing the defective sensor but not the questionable sensor. Replacing the defective sensor has not corrected the problem. I have been told that the ABS light is still on (after driving over 5 mph) and the ABS system is not operating. The extended warranty provider has told me that they will cover replacement of the questionable sensor IF it corrects the problem. If it does not correct the problem I will have to pay for it (~$300) out of pocket. The service technician believes it will correct the problem but would like to "plug his computer" into the ABS system to run a diagnostic to determine if there are other issues. He has not been able to find the "ABS diagnostic port" to plug in his computer. Is there an "ABS diagnostic port" on the 98 model? If so, is it suppose to be located under the dash by the steering column?

Thank you in advance for your assistance.

florida egg is offline   Reply With Quote
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!

Old 09-14-2011, 02:49 PM   #2
Senior Member
Algoma's Avatar
Join Date: Nov 2007
Location: Charleston, WV
Posts: 2,778
There is no diagnostic port on the Type C ABS ECU, which is the one you have. A special cable and test unit is needed to test the ECU which no one has. I can send you a copy of the manual (PM me your email address) which shows you how to do some diagnostics with a switch (not installed by WRV). My insurer would not pay for a new ECU without proof and I would have been out $1400 if that proved not to be the problem. I gave up, removed the ABS bulb and have never been bothered since.
FWIW the ECU is in front of your left foot and the side panel has to be cut back to remove it. The test connector is behind the cover below the transmission selector.

John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD
Algoma is online now   Reply With Quote
Old 09-14-2011, 03:16 PM   #3
Senior Member
Join Date: May 2005
Posts: 163
There are a couple of other things it could be. First and I assume the technician did this, the sensors can be removed easily and cleaned so that can "read" the lugs turning on the wheel that they sense off of. I believe it is posted on the forum about this if you search the alpine site. Second, the lugs can get dirty and may need to be cleaned so that the sensor can "read" the rotation. Regarding this I found that I had a rear axle seal leaking on my 01 and this coated the inner left rear wheel which then picked up dirt and made the lug rotation unreadable by the sensor. These may not be your problem, but something to consider.
2001 36 MDDS
03 Honda Pilot toad
jetar is offline   Reply With Quote
Old 09-14-2011, 11:32 PM   #4
Alpine Dave's Avatar
Join Date: Nov 2010
Posts: 88
The ABS light on my 1999 Alpine would not go out. I discovered that the sensor slots on the rotors were rusted badly enough that there was not sufficient magnetic coupling for the sensor to get a strong enough signal to determine the rotation speed. I replaced the rotors (for other reasons) and ABS light went out the first time I drove the coach.
Alpine Dave is offline   Reply With Quote
Old 09-16-2011, 08:13 PM   #5
Senior Member
Tom and Patty's Avatar

Alpine Owners Club
Join Date: Jun 2004
Posts: 1,923
$300 dollars?
We had to replace a sensor and the cost of the sensor was around $50.

It is pretty much plug and play.
Tom, Patty, Hannah "The Big Dog" and Abby Kat, Indianapolis, Indiana 2000 36' FDS 72232 Our Photos
We live out in our old van. Travel all across this land. Drive until the city lights dissolve into a country sky, me and you - hand in hand.
Tom and Patty is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Can I mix ABS and PVC plastic? MakinSmoke Excel Owner's Forum 11 06-17-2011 04:33 PM
ABS Fault - problem fixed keninvic National RV Owner's Forum 1 01-19-2011 06:37 AM
ABS Light KenJr Ford Motorhome Chassis Forum 10 02-16-2009 11:42 AM
ABS Events & Discoveries C&H from NorCal Alpine Coach Owner's Forum 17 02-22-2008 07:43 AM
Resetting ABS light classic60 Workhorse and Chevrolet Chassis Motorhome Forum 11 01-16-2008 02:38 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:18 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.