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TDC sensor

I've been looking at the wireing diagrams for my 1990 D 405. I'm trying to find out why the rev counter does not work, I recently found it to be electrical.

There appear to be 2 wires (according to the diagram) that go from the instrument cluster to something called a TDC sensor (top dead center?)

The 2 wired connect to points on the instrument cluster labelled "tachometer".

Q1, is one for the road speed and one for engine rpm?

Q2, where, physically, will I find this TDC sensor?

Q3, am I on the right track with this?

-- Regards. Mark.(AKA, Mr.Nice.) ___________________________________________________________ "To know the character of a man, give him anonymity" - Mr.Nice.

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mr.niceATsofthome.nethttp://community.webshots.com/user/mrnice106___________________________________________________________

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Mr.Nice.
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A stab in the dark, but if it does really mean Top Dead Center sensor, then it surely would be on the flywheel housing?

Cheers, Matt

--

1991 Peugeot 205 Roland Garros Cabriolet TU3S 1.4 Carb
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Reply to
Matt

It is best accessed from underneath, it screws into the flywheel housing with one small bolt, this bolt needs to be loosened its a sort of plastic clamp that needs to be prised open with a screwdriver and the sensor can then be pulled out of the clamp, the sensor is looking at the engine side of the flywheel. There should be a cable attached to the sensor it has three wires in it one of which is an earth connection, this cable should go to a brown socket near the thermostat, a brown plug goes from this socket to the tach. I think this brown socket is there so that some diagnostic device can be plugged in and used for determining TDC for setting the pump timing. John

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John Bridge

Twas Tue, 8 Jul 2003 15:57:36 +0100 when "John Bridge" put finger to keyboard producing:

Thanks for that, I'll go poke around. ;o)

-- Regards. Mark.(AKA, Mr.Nice.) ___________________________________________________________ "To know the character of a man, give him anonymity" - Mr.Nice.

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Mr.Nice.

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