Location of Speedometer Sensor ? - SaabCentral Forums
* site search:  
Home Saab Pictures Saab Classifieds Saab Dealer Listings Saab Forum Saab Forum

Go Back   SaabCentral Forums > Saab NG900, 1994-1998 and OG9-3, 1999-2002 & '03 Convertible > Saab NG900 & OG9-3 Workshop
Saab NG900 & OG9-3 Workshop Saab NG900 (1994 to 1998) & OG9-3 (1999-2002) & '03 Convertible Technical Forum

SaabCentral.com is the premier Saab Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default Location of Speedometer Sensor ?

My speedometer stopped working since last year and I found this part on the eeuroports.com.

where this Speedometer Sensor located?

http://eeuroparts.com/productdetail....ts=1&code=8662

(I am not sure if this part caused my faulty speedometer but I like to see if this part looks ok on my car.)
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 10th August 2007
earthworm's Avatar
earthworm earthworm is offline
Saab Sage!
 
Join Date: Jun 2003                                                
Location: Goldsboro, PA
My Saabs: '96 900S, Automatic with 148K miles, blu
Posts: 21,165
Default

There is no "speedometer sensor" as such.
http://www.saabcentral.com/forums/sh...dometer+Sensor

The ABS uses the signal from the RR hub sensor, this is transmitted to the speedometer..
Correction , its the left side..
As part of the "high mileage" service, this area at all four wheels needs to be free of dirt and corrosion, the connections good and the ABS harness secure...
I used "search", hard to remember if it is the RR or the LR hub; many have trouble here, particularly if no service work is ever done..
__________________
The earthworm
'96 900S, Automatic
Those who think in the past will have no future.
173K miles in the good ole USA

Last edited by earthworm; 10th August 2007 at 10:56 AM.
Reply With Quote Quick reply to this message
  #3  
Old 10th August 2007
Diosnoche Diosnoche is offline
Saab Lunatic
 
Join Date: Sep 2006                                                
Location: .
My Saabs: .
Posts: 1,388
Default

First things first, do you have an ABS light on as well?

Check to see if the cruise control works also.

The Speedo signal is taken from the Left Rear ABS wheel speed sensor, the speedo itself gets the signal from the ABS module, as does the cruise control.
Reply With Quote Quick reply to this message
  #4  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default

Thanks!
No ABS light and tell you the truth, I haven't had used cruise control since I bought my saab, not even once! I should test that sometime when I have a chance to drive out from this perennially congested NJ area.
I will check Left Rear ABS wheel speed sensor when I do brake job this fall.
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
  #5  
Old 10th August 2007
Diosnoche Diosnoche is offline
Saab Lunatic
 
Join Date: Sep 2006                                                
Location: .
My Saabs: .
Posts: 1,388
Default

Brake job this fall? you're gonna drive around for 2 months without a speedo?
Reply With Quote Quick reply to this message
  #6  
Old 10th August 2007
untakenname untakenname is offline
Active Member
 
Join Date: May 2006                                                
Location: London, UK
Posts: 72
Default

as a stop gap you can get gps units that also have a speedometer function and it should be more accurate then the car when at a constant speed.
Reply With Quote Quick reply to this message
  #7  
Old 10th August 2007
Diosnoche Diosnoche is offline
Saab Lunatic
 
Join Date: Sep 2006                                                
Location: .
My Saabs: .
Posts: 1,388
Default

I was thinking more about the odometer reading, the car won't have the correct reading if the speedo is left broken for that long.

Actually, does your odometer and trip odometer work? Just wondering if the speedometer only is broken.
Reply With Quote Quick reply to this message
  #8  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default

I donít know how seedo and odometer is getting signal from where (same or two different sensors?) but my speedo hasnít working for a year and strangely enough, my odometer is working fine as well as trip mileage set.

I used frequently to measure the accurate MPG since I havenít seen a fully displayed numbers on my swiss cheese like missing pixeled SID.

(http://www.saabcentral.com/forums/showthread.php?p=1027205#post1027205)
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
  #9  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default

[QUOTE=earthworm]There is no "speedometer sensor" as such.
http://www.saabcentral.com/forums/sh...dometer+Sensor

QUOTE]


I sent an email to eEuroparts.com to ask the location of Seedometer sensor part listed on their page as Part Code: 8781932 Part Name: Speedometer Sensor (A/T).

Customer service, Todd Morin, replied promptly just now. see below.
I think I will take a look to see this horribly expensive $120 sensor on the transmission to see if there is a piece of gold or diamond in it....
I am still in the troubleshooting mode to locate the problem.

================================================== =======
On the transmission, firewall side.

Thanks
Todd Morin
eEuroparts.com
4 Ridge Road
Putnam, CT 06260
860-963-0038
860-963-9404
todd@eeuroparts.com

-----Original Message-----
Sent: Friday, August 10, 2007 10:50 AM
To: customerservice@eeuroparts.com
Subject: Speedometer Sensor location

where this Speedometer Sensor located on my 1997 Saab900S non/turbo?
http://eeuroparts.com/productdetail.aspx?searchResults=1&code=8662
================================================== ======
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
  #10  
Old 10th August 2007
Diosnoche Diosnoche is offline
Saab Lunatic
 
Join Date: Sep 2006                                                
Location: .
My Saabs: .
Posts: 1,388
Default

Well if the odometer is working then only the speedo module is defective, not the speed sensors or anything else.

If the speed sensor was at fault, you would have an ABS light, no cruise control, and the odometer would not work as well.
Reply With Quote Quick reply to this message
  #11  
Old 10th August 2007
Diosnoche Diosnoche is offline
Saab Lunatic
 
Join Date: Sep 2006                                                
Location: .
My Saabs: .
Posts: 1,388
Default

Quote:
Originally Posted by suniku55
I sent an email to eEuroparts.com to ask the location of Seedometer sensor part listed on their page as Part Code: 8781932 Part Name: Speedometer Sensor (A/T).

Customer service, Todd Morin, replied promptly just now. see below.
I think I will take a look to see this horribly expensive $120 sensor on the transmission to see if there is a piece of gold or diamond in it....
I am still in the troubleshooting mode to locate the problem.

================================================== =======
On the transmission, firewall side.
I think buddy Todd might be a little confused, the only speed sensors mounted on the Transmission itself are the input shaft speed sensor, and the Output shaft speed sensor. The other sensor is a Transmission fluid temperature sensor. The input/output shaft speed sensors aren't used for the speedo, their used by the TCM.

Yeah that's the wrong part man, according to EPC, 87 81 932 is the output shaft speed sensor and the input shaft speed sensor. These sensors are used to calculate the shifting times

Last edited by Diosnoche; 10th August 2007 at 12:39 PM.
Reply With Quote Quick reply to this message
  #12  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default

Quote:
Originally Posted by Diosnoche
Well if the odometer is working then only the speedo module is defective, not the speed sensors or anything else.

If the speed sensor was at fault, you would have an ABS light, no cruise control, and the odometer would not work as well.
Thanks! This is clear to narrow down the problem.
When you refer 'The speedo module', you mean the unit on the dashboard with numeric speed marked on?
Can this be replaced easily?

This might be an answer to solve my another problem bugged me a year long!
As soon as my speedo stopped working last year, I began to hear hissing sound deep inside the dashboard behind speedo meter when the car travels over 60mph especially louder in summer time with air conditioner on.
I thought it was another seperate problem I need to tackle down after I fix the speedo meter problem but it looks somewhat related.

Thanks!
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
  #13  
Old 10th August 2007
suniku55's Avatar
suniku55 suniku55 is offline
Senior Member
 
Join Date: Dec 2003                                                
Location: Northern NJ
My Saabs: '97 900S 185K mi
Posts: 225
Default

Thanks for clarification.
That speed sensor must be refering to transmission speed.
__________________
1997 900S 2.3L Auto - 178K mi.(as of 1/09)
www.mysaab900.com
"I rather push my saab than driving a Carmy/Accord."
---------------------------------
Reply With Quote Quick reply to this message
  #14  
Old 6th September 2007
dcoutofstep dcoutofstep is offline
Junior Member
 
Join Date: Sep 2007                                                
Location: DC
My Saabs: None
Posts: 22
Default

Have a similiar issue. Speedometer & Odometer don't work. Have the ABS light, and it says "Brake Light Failure" when the brake lights work. Would a simple cleanning of the speed sensor and connection on the RL hub clear up the issue?
Reply With Quote Quick reply to this message
  #15  
Old 14th January 2014
mlynch001 mlynch001 is offline
Active Member
 
Join Date: Jan 2014                                                
Location: Arkansas
My Saabs: 1999 9-3 SE 5 Door
Posts: 63
Question Newbie needs Help. Speedometer/ABS/Brake lights

I hope this is the place for this discussion. I have a 99 9-3 SE. I have an ABS and a Brake Warning light. I have code P0501. Speedometer, Cruise control and Odometer ALL work. However, My OBDII data log shows NO Vehicle Speed information from the ECU. Car runs perfect. How is it possible for there to be no Vehicle Speed on the Datalog, yet everything works? Cleared P0501 Code and Check Engine light is now out. Code does not reappear. If the left rear ABS sensor drives the Speedometer, and it works, why is there no vehicle speed data showing up at the OBDII Connector? Any ideas? Is there another source for vehicle speed data that is not being discussed or mentioned?
Reply With Quote Quick reply to this message
  #16  
Old 14th January 2014
wjogert wjogert is offline
Senior Member
 
Join Date: Apr 2013                                                
Location: New Hampshire
My Saabs: 2002 9-3 SE 2.0t
Posts: 159
Default

Dude, 7 year old thread... better off to start your own new thread.

But since it's resurrected already, I have a question on the topic:
--If the speed signal comes from the rear ABS sensor only, wouldn't the speedo drop to zero any time that wheel skids?
Reply With Quote Quick reply to this message
  #17  
Old 14th January 2014
jakejm79's Avatar
jakejm79 jakejm79 is offline
Saab on the Brain!
 
Join Date: Sep 2010                                                
Location: Southern NH, USA
My Saabs: 1999 9-3 Conv, 2000 9-3 Conv, 2002 9-3
Posts: 5,889
Default

Yes, but it's pretty difficult to lock up the rear wheels especially with ABS and those tiny rear brakes, whereas it is very easy to spin the front wheels even in the dry.
Reply With Quote Quick reply to this message
  #18  
Old 14th January 2014
mlynch001 mlynch001 is offline
Active Member
 
Join Date: Jan 2014                                                
Location: Arkansas
My Saabs: 1999 9-3 SE 5 Door
Posts: 63
Default Newbie needs Help. Speedometer/ABS/Brake lights

Yes, However, my question remains?

Where is that missing Data for vehicle speed to the ECU? If signal is missing, and it comes from the LH Rear ABS Sensor why do the speedo and cruise still work?

Signal for the WORKING Speedo and Cruise must be coming from some other source, or the signal for the Vehicle speed to the ECU is coming from another source.
Reply With Quote Quick reply to this message
  #19  
Old 14th January 2014
mlynch001 mlynch001 is offline
Active Member
 
Join Date: Jan 2014                                                
Location: Arkansas
My Saabs: 1999 9-3 SE 5 Door
Posts: 63
Default Newbie needs Help. Speedometer/ABS/Brake lights-Redux

Dude - 7 years old, OK, I will start a new thread.

Since I never encountered a single other vehicle that drove the speedometer off of an ABS sensor signal, that is a very strange system, I cannot say. I will say this, most other vehicles have a VSS and three or four ABS sensors. I don't know why SAAB would do it this way?
It should be simple to find out. Jack the car, spin the left rear and see if the speedometer works? I would think that if the left rear wheel sensor does drive the speedo, then if the wheel locked the speedometer should go to zero. OR something should happen "out of the ordinary".
Regardless, my question remains, why NO SPEED Data At the OBD II Port if all else works. This seems to fly in the face of the LH rear hub Sensor explanation. Does the speedometer data come from one source and the ECU data from another sensor? Still waiting to find a reasonable answer based on known information.

BTW- Since I am new, I had to start somewhere, this is where the search landed me.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the SaabCentral Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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

Forum Jump


All times are GMT -4. The time now is 06:29 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

top of page | sitemap | email us



copyright © 2003 - 2011 saabcentral.com, All rights reserved http://www.whiter.co.uk - valid xhtml - valid css
SaabCentral is an independently run website and is not affiliated in any way to Saab Automobile AB.


Garage Plus vBulletin Plugins by Drive Thru Online, Inc.