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Old 11-02-2015, 11:35 AM
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Stretch Stretch is offline
...like a shield of steel
 
Join Date: Sep 2009
Location: Somewhere in the Netherlands
Posts: 14,461
The importance of electrickery and your mechanical speedometer (W201/W124 based)

G'day Folks,

I thought I'd post up this nugget of information in a separate thread.

Coming from a simple / old fashioned vehicle / diesel background I've been struggling with KE CIS systems.

User supercow sent me a whole load of information that I diligently read. Reading the foot notes I came across this =>



So on SOME W201s and W124s with Bosch KE fuel injection systems there's a Hall effect sensor on the output of the MECHANICAL speedometer cable.



Number 5 in the picture above.

So if like me you have random stalling and fluctuating revs and you've mistakenly thought the operation of your mechanical speedometer was not important - think again!

Note also =>

Error codes for road speed sensor B6 are not stored in the "computer" as usual. Switch off the ignition and they are gone!

Drives me effing mad this KE ****...
Attached Thumbnails
The importance of electrickery and your mechanical speedometer (W201/W124 based)-w201_018-road-speed-sensor-b6-fault.jpg   The importance of electrickery and your mechanical speedometer (W201/W124 based)-w201_018-speedometer-hall-sensor-position.jpg  
__________________
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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