Garage Support

Back to Forum

Post a Response

Range Rover P38 2001 - Speedo fault #

Posted by Steve Harrison on December 3, 2011, 7:56 pm

Year of Manufacture *: 2001

Hi

Hoping someone can give me some guidance on this.

As subject line speedo is inoperative and also there is no vehicle speed in engine live data (Code also stored for vehicle speed). I understand this is transmitted to the PCM from the instrument cluster.
The vehicle has Wabco ABS which transmits a square wave to pin 11 C1289 on the Becm, this signal is consistent and varies in frequency with speed. Pin 16 C1280 is the link to the cluster but I am unsure on the Range Rover if this is a positive square wave out to the cluster or if it is a negative switch of a signal from the cluster? There is no signal on this wire, the wire has been load tested for voltage drop / short and the connections are clean and dry.

Many thanks

Steve

Re: Range Rover P38 Speedo fault

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on December 3, 2011, 8:11 pm, in reply to "Range Rover P38 Speedo fault"
Mark Carter

Hi Steve,

I think it's a positive output, but not certain.

I can look at a 2001 Disco II on Monday if that helps.

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: Range Rover P38 Speedo fault

Posted by Steve Harrison <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1363' width='330' height='300' border=0 style='border:none;'> on December 4, 2011, 7:09 pm, in reply to "Re: Range Rover P38 Speedo fault"
Stephen Harrison

Hi Mark

Hope you are all well.

If you get time that would be good. Just need to be sure before simulating any signals

.

Thanks

Steve

Re: Range Rover P38 Speedo fault

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on December 4, 2011, 7:27 pm, in reply to "Re: Range Rover P38 Speedo fault"
Mark Carter

I will do it tomorrow morning and post or phone you.

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: Range Rover P38 Speedo fault

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on December 6, 2011, 1:07 pm, in reply to "Re: Range Rover P38 Speedo fault"
Mark Carter

Hi Steve,

I made a phone call as agreed when we spoke yesterday.

The guy has got a P38 but it is out at present.

Please let me know if you don't get to the bottom of this one and I will borrow the vehicle for five mins when it's back.

Regards mark

Modern cars, Its all wizardry and witchcraft

Re: Range Rover P38 Speedo fault

Posted by Steve Harrison <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1363' width='330' height='300' border=0 style='border:none;'> on December 6, 2011, 7:14 pm, in reply to "Re: Range Rover P38 Speedo fault"
Stephen Harrison

Mark

Thanks for you time. I will let you know. I may have got access to another one later in the week.

Thanks again

Steve

Re: Range Rover P38 Speedo fault

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on December 6, 2011, 7:19 pm, in reply to "Re: Range Rover P38 Speedo fault"
Mark Carter

No worries Steve, any time.

Mark

Modern cars, Its all wizardry and witchcraft

« Back to index

[ Garage Support ]

Copyright © uk autotalk