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Home >> Mercedes Benz >> 2002 >> SLK 230 (170.449) L4-2.3L SC (111.983) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Initial Inspection (Description and Operation of ME-SFI Systems & Components) >> ME Engine Speed Signal Function
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ME Engine Speed Signal Function




ME Engine Speed Signal Function

ENGINE 111.951 /952 /955 /956 /957 /958 /982 /983 with CODE (925) low emission EURO3




Signal assignment
1 Crank angle
2 Cylinder 1 ignition TDC 3 Signal of crankshaft position sensor (L5)
4 Signal camshaft Hall sensor (B6/1)
5 TNA engine speed signal

The short circuit-proof engine speed signal TNA is generated from the signal supplied by the crankshaft position sensor, and output to other control modules.

The engine speed signal TNA is a square-wave signal with a constant on/off ratio; maximum current approx. 20 mA.

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