ME engine speed signal, function - GF07.61-P-3017M

ENGINES 275.950 in MODEL 215, 220

ENGINES 275.951 in MODEL 230 up to Model Year 08/Modification Year 07

ENGINES 275.953 in MODEL 216, 221 up to Model Year 08/modification year 07

ENGINES 275.954 in MODEL 230 up to Model Year 08/Modification Year 07

ENGINES 275.980 in MODEL 215, 220

ENGINES 275.981 in MODEL 230 up to Model Year 08/Modification Year 07

ENGINES 275.982 in MODEL 216, 221 up to Model Year 08/modification year 07

ENGINES 285.950 in MODEL 240

ENGINES 285.980 in MODEL 240

Fig 1: ME Engine Speed Signal Function Diagram

Courtesy of MERCEDES-BENZ USA

Signal assignment

Task

The short circuit-proof engine speed signal TNA is generated in the ME control unit from the signals supplied by the crankshaft position sensor and forwarded to other control units via the CAN data bus.

Design/function

The engine speed signal "TNA" is a square wave signal with a constant square wave pulse duty cycle. 3 pulses are output per engine revolution. If the signal from the crankshaft position sensor fails, then the signals of the camshaft Hall sensor are used as a replacement (for emergency running).

	ME-SFI control unit, location/task/design/function		GF07.61-P-5000M
	Crankshaft position sensor, location/task/design/function		GF07.04-P-4116M
	Camshaft Hall sensor, location/task/design/function		GF07.04-P-4117M