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

ENGINE 156.980 in MODEL 164, 251 

ENGINE 156.982 in MODEL 209 

ENGINE 156.983 in MODEL 211, 219 

ENGINE 156.984 in MODEL 216, 221 

Based on the signals from the crankshaft Hall sensors, the short circuit-proof engine speed signal TNA is generated in the ME control unit (N3/10) and forwarded to other control units via the CAN data bus.

The engine speed signal TNA is a square-wave signal with a constant on/off ratio of 6 pulses per engine revolution (a 30° CA) and a maximum current strength of approx. 20 mA.

If the signal from the crankshaft Hall sensor fails, the signals of the camshaft Hall sensor are used as a substitute values (for emergency mode).

Diagnosis 

The engine speed signal is picked up at the data link connector.

	Component description for a camshaft Hall sensor	B6/4, B6/5, B6/6, B6/7	GF07.04-P-6020AMG
	Component description for a crankshaft Hall sensor	B70	GF07.04-P-6220AMG
	Component description for an ME-SFI [ME] control unit	N3/10	GF07.61-P-6000AMG