Clutch switch

[Heath]

I noticed when I changed my brakelight switch there was also a switch for the clutch pedal, what is this switch for ?


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[si-forks]

On my 5 series it to deactivate the cruise control if that helps

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[Heath]

I did think they were normally there for cruise control but I dont have cruise control on my zed


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[Jonttt]

Often the wiring looms and ancillaries for accessories are fitted at the factory as its cheaper for BMW in the long run. Makes the cruise retrofit relatively easy

[Frank.A]

US market manuals had a clutch switch fitted to stop drivers starting the car in gear.The clutch pedal had to be depressed before the starter would operate.

Also there is this mod which may only apply to US market cars.
http://www.zroadster.net/forum/viewtopi ... =5&t=22333

Mod Edit: link fixed to remove IP address - Frank, please use zroadster.net to login to the site.

[Mike Fishwick]

UK cars do not have the clutch/starter interlock switch.

On our cars the clutch switch is in the ECU system, and tells the ignition timing circuit that you are changing gear, so allowing a more rapid fall in rpm.

Mine gave trouble while still in BMW warranty, the rpm rising by up to 1500 rpm during a gear change.

[c_w]

Didn't realise it affected the revs when changing, not something I've noticed on my car. I can't detect what it does but obviously it's definitely there to cancel the cruise.

[pingu]

On our cars the clutch switch is in the ECU system, and tells the ignition timing circuit that you are changing gear, so allowing a more rapid fall in rpm.

Learn something new every day .

[Mike Fishwick]

A popular modification in America is to hot wire the clutch switch to permit faster throttle response all the time, which I keep planning to try out, as the Z3 always feels like it has too much flywheel effect. Maybe I'll get round to it this summer.

I think the cruise control cutout is a seperate switch.

[Heath]

glad you got it sorted


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