What's new
Porsche 911 UK Enthusiasts Online Community Discussion Forum GB

Welcome to the @Porsche911UK website. Register a free account today to become a member! Sign up is quick and easy, then you can view, participate in topics and posts across the site that covers all things Porsche.

Already registered and looking to recovery your account, select 'login in' and then the 'forget your password' option.

Porsche Specialist Surrey, Porsche Specialist London, Porsche Specialist East Sussex, Porsche Specialist West Sussex, Porsche Specialist South

964 Speed sensor question if anyone could help

A

Astill

New member
Joined
9 Nov 2010
Messages
22
Hi All,

I have had an issue with my speedo not working, have replaced a faulty wiring loom to the brakes and its not fixed the issue. I am thinking now it must be a speed sensor issue as I have checked all of the fuses. I had it in my head the the speed sensors were on the front wheels of a 1990 C2 but looking on the parts websites it looks like they could be on the rear as well. If anyone knows if the rear are just ABS or speed as well it would be greatly appreciated and a massive help!

Many thanks


Paul
 
The 1990 cars take the speedo signal from the gearbox, the sensors on each wheel are for ABS only. If the spoiler goes up at 50mph then the signal is ok, if it goes up at 70mph then the signal is not ok and the emergency backup signal from the ABS is being used to raise the spoiler iirc.
 
Ras62,

how about tiptronic cars ? Sensor is on the tiptronic box ?.

Mine is 1991 c2 tip and is having ABS light and total speedo non operation odometer, speedo needle.

ABS light comes on sometimes and when off, all works fine.

If ABS wheel sensors were at fault, presumably would only be ABS light on adn speedo fine ?

Words of wisdom appreciated
 
Check the front left ABS sensor as this signal is also used for speed indication on the 91 and later cars. The signal from the ABS sensor is fed to R52 (via the ABS unit). R52 is a frequency control unit which in turn sends the converted signal to the speedo.
 
Hi Ras62 & Jilee

Just having the sensors changed to see if that cures it. Thanks for your advice its appreciated!

Paul
 
Thanks Ras62,

will have mechanic check and clean the front ABS sensor.

How about the triptronic box - is there any sensor there like the manual box ?.

mine is very sporadic. Even during driving, if the BAS light was on when startying, sometimes it goes off when driving and the speedo works then ABS might come on again during the same trip and speedo stops again. bit annoying so wanted to get this sorted and advise the mechanic what to check, clean etc

Astill

hope you get it sorted. labour of love these 964's ;-)
 
All tips use the ABS sensor no matter year built. Only the 89/90 manual models use the gearbox sender.
I would also suggest you resolder the clock, it is a problem on these cars that can effect the speedo and many other warning lights. Basically take the back off the clock and resolder the main pin connections, there are links on the net if you need more info.
 
You must log in or register to reply here.

Similar threads

thesmithsUK
Help with Spoiler + Speedo outage
Replies
7
Views
637
thesmithsUK
thesmithsUK
G
Speedometer troubleshooting... Please help!
Replies
1
Views
749
ras62
R
I
Crank position sensor broken HELP Please!
Replies
7
Views
450
iainm198
I
B
Analogue Speedo & Fuel Gauge Issues
Replies
4
Views
556
Carrera4Boy'sDad
C
JonnieD
ABS kicks in early / Ice mode - which sensors to check?
Replies
6
Views
718
Winny911
W
S
PASM nightmare and acceleration sensor? Red herring?
2
Replies
15
Views
2K
Oggy172
O
G
Speedo help needed
Replies
2
Views
260
GiovanniM
G
Specialist in Porsche car sales

Latest posts

New Threads

Porsche Model Range

Porsche 911

Porsche 992: 2018- Porsche 992: 2018- Porsche 991: 2011-2019 Porsche 991: 2011-2019 Porsche 997: 2004-2012 Porsche 997: 2004-2012 Porsche 996: 1997-2005 Porsche 996: 1997-2005 Porsche 993: 1993-1998 Porsche 993: 1993-1998 Porsche 964: 1989-1993 Porsche 964: 1989-1993 Porsche Carrera 3.2: 1983-1989 Porsche Carrera 3.2: 1983-1989 Porsche Carrera SC: 1977-1983 Porsche Carrera SC: 1977-1983 Porsche 930 Turbo: 1975-1989 Porsche 930 Turbo: 1975-1989 Porsche Early 911: 1964-1977 Porsche Early 911: 1964-1977

Porsche Hypercars

Porsche 918 Spyder Porsche 918 Spyder Porsche Carrera GT Porsche Carrera GT Porsche GT1 Porsche GT1 Porsche 959 Porsche 959

Other Current Porsche Model

Porsche Taycan : (2019-0%) Porsche Taycan : (2019-0%) Porsche Macan : 2013- Porsche Macan : 2013- Porsche Panamera : 2009- Porsche Panamera : 2009- Porsche Cayman: 2005- Porsche Cayman: 2005- Porsche Cayenne: 2003- Porsche Cayenne: 2003- Porsche Boxster: 1997- Porsche Boxster: 1997-

Porsche Legacy Models

Porsche 928 Porsche 928 Porsche 968 Porsche 968 Porsche 944 Porsche 944 Porsche 924 Porsche 924 Porsche 914 Porsche 914 Porsche 912 Porsche 912 Porsche 904 Porsche 904 Porsche 550 Porsche 550 Porsche 356 Speedster Porsche 356 Speedster Porsche 356 Porsche 356

Forum statistics

Threads
124,554
Messages
1,441,463
Members
48,967
Latest member
Max V

porsche insurance porsche parts porsche sales porsche car sales porsche for sale
porsche classic sales porsche tuning porsche sold porsche specialist porsche engine rebuilds porsche driver training porsche car sales porsche exhausts

Community platform by XenForo® © 2010-2024 XenForo Ltd. XenForo theme by xenfocus

www.911uk.com @Porsche911UK THE DEFINITIVE PORSCHE FORUM Copyright © 911UK 2002-2024 All rights reserved.

911uk.com is not associated and is wholly independent of Porsche Automobil Holdings SE, Dr. Ing.h.c.F.Porsche AG, Porsche Cars GB, its subsidiaries and offical Porsche centres. Any word, phrase or graphic that in any way resembles anything to do with the Porsche name or organisation are registered trademarks of Porsche Automobil Holdings SE and Dr. Ing.h.c.F. Porsche AG.

Back
Top