GF07.61-P-3017MIK ME Engine Speed Signal, Function

GF07.61-P-3017MIK ME Engine Speed Signal, Function
- refinement package
- as of model year 09


Engine speed signal unction requirements, general
^ Circuit 87 M ON (engine control ON)
^ Engine running

Engine speed signal, general
Using the signal from the crankshaft Hall sensor (B70), the ME-SFI control unit (N3/10) generates the short-circuit-proof TNA engine speed signal (for example, for mechanical testing and diagnosis), and sends it as a direct signal.

Engine speed signal function sequence
A voltage pulse (AC voltage) is generated in the crankshaft Hall sensor by the stays on the increment wheel (perforated plate) for a turning crankshaft. Here each stay generates a voltage pulse. No voltage is generated as a result of the gap created by 2 missing stays.

The engine speed signal TNA is a square-wave signal with a constant on/off ratio of 6 pulses per engine revolution (a 60° CA) and a maximum current of approx. 20 mA.

If the voltage pulse fails from the crankshaft Hall sensor, voltage pulses from the intake camshaft Hall sensors, on the left and right (B6/4, B6/5) are used instead (for limp-home mode) or used by the exhaust camshaft Hall sensors, on the left and right (B6/6, B6/7).

The engine speed signal can be read out at the data link connector (X11/4) using commercially available diagnostic units.

Component Identification: