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 01-26-2005, 06:22 PM
archibald2's Avatar
Registered User
 
Join Date: Jan 2003
Location: Houston, Texas
Posts: 59
Question What is an OVP?

Please forgive my ignorance, but could someone tell me what the acronym OVP stands for. I performed a search on the subject and there were many references to this device but no expansion of the acronym. One of my cars has an M104 engine and references to the "OVP" were made in the same thread.

__________________
'82 300D Turbo 204K
'10 Toyota Prius 85K
'13 AMG C63 (P30) 23K
'14 Audi Q5 TDI 46K
'16 RAM 2500 CTD 12K

'10 VW Jetta TDI 65K (traded)
'12 Nissan Leaf 34K (returned end of lease)
'15 Audi A6 TDI 25K (traded)
'95 E320 166K (traded)
'93 300D 2.5 Turbo 168K (sold)
Reply With Quote
  #2  
Old 01-26-2005, 06:30 PM
pberku's Avatar
Registered User
 
Join Date: Oct 2003
Location: Montreal, Canada
Posts: 737
OVP stands for the: Over 'Voltage Protection Relay. This Relay acts something like a fuse, except that instead of protecting against excess currents, it protects against excess voltages.

Phil
__________________
'95 E300 Diesel, 264,000 Miles. [Sold it]
Reply With Quote
  #3  
Old 01-26-2005, 06:32 PM
archibald2's Avatar
Registered User
 
Join Date: Jan 2003
Location: Houston, Texas
Posts: 59
Phil,

really appreciate the concise answer.

Stuart
__________________
'82 300D Turbo 204K
'10 Toyota Prius 85K
'13 AMG C63 (P30) 23K
'14 Audi Q5 TDI 46K
'16 RAM 2500 CTD 12K

'10 VW Jetta TDI 65K (traded)
'12 Nissan Leaf 34K (returned end of lease)
'15 Audi A6 TDI 25K (traded)
'95 E320 166K (traded)
'93 300D 2.5 Turbo 168K (sold)
Reply With Quote
  #4  
Old 01-27-2005, 01:05 AM
Registered User
 
Join Date: Jul 2001
Location: SoCal
Posts: 1,303
The OVP primarily acts as a voltage conditioner, with a relay that will trip off if the voltage spikes too high. It protects the ECU and other critical electronics. Problems arise when the relay contacts or solder joints deteriorate. At this point it becomes a 'voltage de-conditioner', and can cause erratic operation of the ECU and the circuits it controls.

Steve
__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
Reply With Quote
  #5  
Old 01-27-2005, 08:00 AM
pberku's Avatar
Registered User
 
Join Date: Oct 2003
Location: Montreal, Canada
Posts: 737
I should have also mentioned the the OVP Relay has a fuse of its own, located on top of the relay itself. Sometimes that fuse blows, causing erratic symptoms, such as hard starting, ABS light on, high/rough idle speed, etc.

Not sure about your car, but the OVP relay is usually located in front of the firewall, behind the Battery. The black plastic panel, behind the battery needs to be removed to gain access to it.

Phil
__________________
'95 E300 Diesel, 264,000 Miles. [Sold it]
Reply With Quote
  #6  
Old 01-27-2005, 10:24 PM
Registered User
 
Join Date: Jan 2005
Location: Miami Florida
Posts: 48
Thanks for the great and detailed information. I have been researching for the past 4 weeks if a 1996 E320 has an "OVP". The only relays I have found are located on the right rear of the engine compartment and it is one unit(relay module) inside the engine computer compartment.

Does anyone knows if it is another location for the OVP? Does this vehicle has one?

I would greatly appreciate any help.

Norman
Reply With Quote
  #7  
Old 01-27-2005, 10:34 PM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
No OVP on 210..
Reply With Quote
  #8  
Old 01-27-2005, 11:21 PM
sfloriII's Avatar
Still pedaling...
 
Join Date: Aug 2003
Location: Northern VA
Posts: 1,614
Is it possibel that this is the cause of my complete electrical dropout tonight? (Please see my thread posted recently.)

I do get the eternal ticking noise coming from behind the passenger side of the dash.

__________________

Current:
2014 VW Tiguan SEL 4Motion 43,000 miles.

2016 Hyundai Santa Fe Sport (wife's).

Past:
2006 Jetta TDI 135,970 miles. Sold Nov. '13.
1995 E-320 Special Edition. 220,200 miles. Sold Sept. '07.
1987 190-E 16 valve. 153,000 miles. Sold Feb. '06.
1980 300-D 225,000 miles. Donated to the National Kidney Foundation.
1980 240-D manual, 297,500 miles. Totaled by inattentive driver.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
560 SEC OVP issues (please help) avendlerdp Tech Help 8 01-15-2005 11:18 AM
1988 190e 2.3 idle stall OVP? Machnumber2 Tech Help 5 11-20-2003 07:25 AM
190 E - Where is OVP located? Trex Tech Help 7 07-06-2003 02:22 AM
OVP Relays -- Which Ones Are Faulty? Part #'s... Donna Tech Help 5 05-16-2003 03:19 PM
Battery and OVP A Khan Tech Help 2 04-28-2003 05:56 PM



All times are GMT -4. The time now is 11:17 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page