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Renault Megane Coupe 2.0 1998 - Speedo in-op - Fixed #

Posted by Nigel Yardley on February 9, 2010, 5:44 pm

Year of Manufacture *: 1998
Engine Code or CC *: 2000 F3R 796

Car speedo in op, vehicle speed ok in abs live data, but missing from engine live data.

Dived straight in and started looking for break in usual grey wire in loom on N/S/F wing, after not finding any problems I decided to look a little deeper.

When testing with the vehicle running in gear on lift,the grey wire from pin 12 on ecu (according to autodata, from vehicle speed sensor) has +ve 12v, with no square wave.

My question is do all 4 wheels need to be turning to get a speed signal? and which wires on abs unit produce the signal, as I dont seem to have a signal here.

Autodata and vivid both list a wire from vehicle speed sensor, but I assume this must come from abs ecu.

Re: Renault Megane Coupe 2.0 1998 - Speedo in-op #

Posted by Darren Jones <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5495' width='330' height='300' border=0 style='border:none;'> on February 9, 2010, 7:56 pm, in reply to "Renault Megane Coupe 2.0 1998 - Speedo in-op #"
Darren Jones

Hi, looking at autodata the wiring diagram suggests that the car runs a speed sensor on the gear box and probably hall effect type. There does not seem to be a connection to ABS , i have not had any dealings with the 2.0 but i would be volt drop test the wiring to the sensor especially the earth.

Re: Renault Megane Coupe 2.0 1998 - Speedo in-op #

Posted by Michael McDowell <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1017' width='330' height='300' border=0 style='border:none;'> on February 9, 2010, 8:47 pm, in reply to "Re: Renault Megane Coupe 2.0 1998 - Speedo in-op #"
Michael McDowell

hi nigel the wires generaly corroded behind the battery remove battery and you will see a multi plug at the bottom thats where speedo wire goes to dash. m mcdowell

Fixed #

Posted by Nigel Yardley on February 10, 2010, 10:04 am, in reply to "Re: Renault Megane Coupe 2.0 1998 - Speedo in-op #"
Message modified by board administrator February 10, 2010, 2:58 pm

Found fault, now feel a little stupid.

The car had, in its history, had the wrong gearbox fitted. There was no speedo sensor fitted to the new box. The wiring for it was tucked up out of the way.

Hence no signal from abs and no switching on grey wire.

Customers, dont you love them

Re: Fixed #

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on February 10, 2010, 5:38 pm, in reply to "Fixed #"
Mark Carter

"Found fault, now feel a little stupid."
is that legal?

Regards mark

Modern cars, Its all wizardry and witchcraft

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