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Total Carlton > Carlton Technical > Sparky Bits > Cruise Control Speed Sensor.
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Author Topic: Cruise Control Speed Sensor.  (Read 519 times)
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Bernard
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Diplomat 2.0 92 Frost Blue Mk2 Carlton 2.0 86
« on: May 13, 2007, 07:30:43 PM »
Cruise Control on Mk 3 Carlton 2.0 Litre Manual. Is there a Speed Sensor fitted to prevent you using the control below 40Mph and if so can you please tell me where it is located?
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Murph
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« Reply #1 on: May 13, 2007, 07:41:58 PM »
IIRC it uses a pulse from the engine ECU - someone will shout if I'm wrong on that.

I'm sure it should work at 30 though!
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Bernard
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Diplomat 2.0 92 Frost Blue Mk2 Carlton 2.0 86
« Reply #2 on: May 13, 2007, 07:56:03 PM »
Cheers m8, Was only guessing at 40 Smiley Smiley Wink
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flash911
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« Reply #3 on: May 13, 2007, 08:20:18 PM »
could be why miine isnt working lol
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jonnybear
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1993 (k) Carlton CDi 2.0i, Tyne And Wear (NE)
« Reply #4 on: May 13, 2007, 09:47:41 PM »
it works anything after 25, its located above the speedo cable at the back of the cluster Smiley
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Bernard
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Diplomat 2.0 92 Frost Blue Mk2 Carlton 2.0 86
« Reply #5 on: May 16, 2007, 07:56:30 PM »
Cheers for that very Helpfull information M8 .
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melinx
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« Reply #6 on: May 17, 2007, 07:08:12 AM »
It may not be a problem with the speed sensor, mine was very erratic until I discovered the problem outlined below.

http://totalcarlton.com/forums/index.php?topic=473.msg12255#msg12255
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Bernard
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Diplomat 2.0 92 Frost Blue Mk2 Carlton 2.0 86
« Reply #7 on: May 17, 2007, 07:42:02 PM »
Cheers m8, The information does make sense but i have tried another Cruise Control ECU and Switch.
I have also checked the loom in between the two of them for Continuity.
Looking at the wiring diagram there is what is called a Clutch Relay which cancels the CRC when you brake ,so this the next thing to check and also of course the Double Brake Light-CRC Switch.
Will keep you upto date.

Cheers Bernard Smiley Wink
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carlton_mad
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« Reply #8 on: May 17, 2007, 07:57:33 PM »
on the manual models there is no relay there should be a switch on the clutch pedal that cancells the cruise when you put the clutch in
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Bernard
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Diplomat 2.0 92 Frost Blue Mk2 Carlton 2.0 86
« Reply #9 on: May 19, 2007, 08:50:20 PM »
Cheers m8,as you say there is no sign of the Clutch Relay any where on the car so i will have to look in the clutch pedal area when i take the trim down again.
Thinking about it,if you were to change gear with the crc engaged the engine revs would suddenly rise as you dipped the clutch and so it makes sense to fit a switch that disengages it.
Many Thanks once again for your invaluably input. Smiley
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