Td5 Clutch Switch

[NomadABC]

Can anyone tell me where the clutch switch is on a Td5? I admit, I'm being a bit lazy here as I haven't even tried to look yet.

[NomadABC]

Managed to find it in the manual. It's fitted to the clutch line on the bulkhead, in case anybody else was thinking of looking:rolleyes:

[Disco69]

I might be being a bit of a thicko here but what does the clutch switch do? what is it for?

[browng5]

It is used as part of the Cruise control. If you put your foot on the clutch it disengages the Cruise control.

Graeme

[NomadABC]

It is used as part of the Cruise control. If you put your foot on the clutch it disengages the Cruise control.

Graeme

More importantly, it tells the ecu to reduce fuelling when the clutch is depressed. My Td5 (very) ocassionally continues to rev when changing gear. Either a symptom of a dodgy clutch switch, or a throttle potentiometer. One's cheap, the other isn't. Guess which i'm looking for?

[12bore]

More importantly, it tells the ecu to reduce fuelling when the clutch is depressed. My Td5 (very) ocassionally continues to rev when changing gear. Either a symptom of a dodgy clutch switch, or a throttle potentiometer. One's cheap, the other isn't. Guess which i'm looking for?
I believe theres another use linked to the ECU with the TD5. When you take your foot off the throttle (it does happen occaisionaly!!), the ECU cuts all fuel off. to make sure the engine doesn't die when you change gear/stop the clutch switch tells it to restart fuelling.

[Disco69]

Thanks for answering my question guys, I hadn't realised that the td5 has such complicated/sophisticated control systems.

I guess its just a reminder of how much work and technology we take for granted nowadays.

Hope a new (cheapest option) clutch switch cures your problem Nomad - I don't know how much a throttle potentiometer is but I replaced one on a bmw not long ago and it was around 200pounds!!!:eek:

[JonS]

More importantly, it tells the ecu to reduce fuelling when the clutch is depressed. My Td5 (very) ocassionally continues to rev when changing gear. Either a symptom of a dodgy clutch switch, or a throttle potentiometer. One's cheap, the other isn't. Guess which i'm looking for?

Nomad, I finally had my clutch switch replaced last week to solve the same problem.
Seems to be working so far, although I found the problem was one which could disappear for a week or two before it happened again.
Hope it works for you!

Jon

[NomadABC]

Nomad, I finally had my clutch switch replaced last week to solve the same problem.
Seems to be working so far, although I found the problem was one which could disappear for a week or two before it happened again.
Hope it works for you!

Jon

Jon, what was the damage for the switch?

[JonS]

I'm happy to say he used a second hand part and didn't charge me for it! The car was in for a couple of other jobs as well, and this just got lost in the labour charge.

So sorry, can't help you!

Jon

[NomadABC]

Thanks anyway.

[kzycnn]

Guys,

Sorry if I'm stealing the thread but, on my Disco II I occasionaly get over fueling when descending off road i.e. no throttle, low revs. This reveals itself as a sudden surge which, as you can imagine, can be a bit disconserting. Could this be a faulty clutch switch?

Tony

[NomadABC]

It could be, but more likely it could be that you are nearing the tickover speed and the ecu then starts fuelling to prevent stalling. At other times, on overrun, the fuel is cut. I really notice it on mine when the weather is cold and the tickover is near 1000 RPM. I have to make sure I take junctions in second as it will accellerate in third otherwise. A bit disconcerting.

I used to have a petrol Fiat that did the same. But that's another story.

[kzycnn]

Thanks. I guess you're talking about the 'anti-stall' mechanism. I didn't think this would come in to play as, effectively, the car is just ticking over.

I've only noticed the problem when in low box. It also occurs more often when I've been on 'overrun' for some time.

Tony