Parts Catalog Accessories Catalog Tech Info Tech Forums
 
  Search our site:    
 Cart  | Project List | Order Status | Help    
  Join us November 1st for Casino Night at the Pelican Parts Open House!
Benefiting LuMind - Research and Treatment for individuals with Down Syndrome
Go Back   Pelican Parts Technical BBS > 2- BMW Forums > BMW Technical Forums > BMW 5-Series E28/E34/E39

Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Jun 2004
Location: NJ
Posts: 15
1998 528i no power to Secondary Air Pump

Hi all,

We have a 1998 528i that shows a DTC, I forget the #, but it points to the Secondary Air Pump. There is no power going to the pump. If I use an external 12V applied to the pump it runs. Does anyone know if the pump is supposed to run all the time? I didn't find any bad fuses, but I also didn't find any fuses labeled, Secondary Air Pump. Is it controlled by a relay?

Thanks for your help!

John
__________________
MJ & JJ
Old 03-02-2007, 11:54 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #1 (permalink)
Moderator
 
Jeron's Avatar
 
Join Date: Feb 2004
Location: DFW (Hurst), Texas
Posts: 4,724
Garage
It only comes on for a short while at startup. It has a relay and that is the next thing to check. You need a Bentley for the E39 or search the web for the relay location or try the main power distribution box and see if it is listed on the lid.
__________________
HPDE Instructor (BMW / PCA / Apex)
Here: 1997 M3/4 Byzanz/Magma ~ 2001 330i Silver/Grey ~ 1997 R1100RT ~ 1991 Ford F-150 5.8l
Gone: :'( 98 Camry V6 97 Camry I4 97 Mazda 626 I4 :'(93 Sentra SE-R 88 Toyota Truck I4
Old 03-02-2007, 01:22 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #2 (permalink)
Moderator
 
Jeron's Avatar
 
Join Date: Feb 2004
Location: DFW (Hurst), Texas
Posts: 4,724
Garage
Use this:
Electronic Shop Manual

Go to the Automotive section then select your car then Wiring Diagrams.
__________________
HPDE Instructor (BMW / PCA / Apex)
Here: 1997 M3/4 Byzanz/Magma ~ 2001 330i Silver/Grey ~ 1997 R1100RT ~ 1991 Ford F-150 5.8l
Gone: :'( 98 Camry V6 97 Camry I4 97 Mazda 626 I4 :'(93 Sentra SE-R 88 Toyota Truck I4
Old 03-02-2007, 01:28 PM
  Recommend this thread for the PelicanWiki    Reply With Quote #3 (permalink)
Registered User
 
Join Date: Jun 2004
Location: NJ
Posts: 15
did some more checking over the weekend...

There is a valve/switch installed down stream of the scondary air pump. It is vacuum operated. I followed the vacuum line to a switch mounted between intake runners 1 & 2. I'm guessing that when the switch is activaed it lets vacuum pass through to the valve/switch downstream of the secondary air pump. The plug that goes into the switch did not have power when I checked it. Does anyone know when this switch is supposed to be activated? ( it may be called the Back Pressure Valve) And what activates it? We do have vacuum to the switch.

There was info on the switch:
7 22341.00
12V 98T145
1 742 712
Pierburg
PA6 GF30

We are still trying to find out more about how this whole system works.
We are also trying to identify which relay and/or fuse controls the secondary air pump.

Any info would be appreciated however small it might be.

Thanks!
__________________
MJ & JJ

Last edited by MJ & JJ; 03-05-2007 at 12:01 PM..
Old 03-05-2007, 11:57 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Jan 2007
Location: west chester pa
Posts: 183
the valve has nothing to do with the power to the pump. if no power, check the wires, if they are good, check the relay
__________________
gONe
Old 03-07-2007, 08:51 AM
  Recommend this thread for the PelicanWiki    Reply With Quote #5 (permalink)
Old 03-07-2007, 08:51 AM
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 



All times are GMT -8. The time now is 11:06 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.