Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-19-2005, 07:34 AM
Registered User
 
Join Date: Jan 2002
Location: England
Posts: 1,841
Does OVP/fuse failure always take out the ABS too?

Does anyone know?

If so then it's an easy way to rule out the OVP as a problem.

__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
Reply With Quote
  #2  
Old 12-19-2005, 08:46 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
ON the W201 chassis the answer is YES!
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 12-31-2005, 12:12 PM
Registered User
 
Join Date: Jan 2002
Location: England
Posts: 1,841
Quote:
Originally Posted by M.B.DOC
ON the W201 chassis the answer is YES!

OK then thanks big DOC, on which cars is the answer NO? What about W201s with the dual-fuse type OVP or with ASD - on these can/does the OVP partly fail taking out only some systems?

I am referring specifically to my ASD. I have a much too high resistance between the computer and the ASD operating solenoid valve. Have checked the resistances of sensor, every wire, and ONLY the OVP lies in the circuit to be causing the high resistance. Yet my ABS works perfectly and cold starting is not as awful as with a bad OVP (but not great - I'm saving that one for another thread)

cheers matey,

Russell
__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
Reply With Quote
  #4  
Old 01-21-2006, 09:46 AM
Registered User
 
Join Date: Jan 2002
Location: England
Posts: 1,841
To answer my own question, and somewhat controversially oppose M.B.DOC :

Due to an ASD fault I have realised two pins on the OVP are not being connected when the OVP powers up, though they should be.

I took my OVP out, and there was no change to the engine's running ?!?! The ABS light did come on now that it was removed though, which means it was doing something.

So I took the step of bridging the 2 pins that should be connecting myself (87E and 87L).


Lo and behold, engine running becomes more normal, laggy throttle response *seems* to be gone, and ASD problem fixed.

So, on first impressions, I would suggest a portion of my OVP has failed, without taking out the ABS.

But it should be noted that this is a twin-fuse OVP, on an ASD equipped W201, which is not available in America!


Russell

__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page