GF54.30-P-3021RT Display Engine Speed, Function

GF54.30-P-3021RT Display Engine Speed, Function

Component Identification:

Networking
The rpm is recorded by the crankshaft position sensor (engine 113, 156 only) or by the crankshaft Hall sensor (engine 272, 273, 642 only).
The signals are read in by the ME-SFI [ME] control unit or by the CDI control unit and placed on the CAN engine compartment as a CAN message (in rpm)

The instrument cluster receives the CAN message and actuates the stepper motor for the tachometer relative to the engine speed.

Warning range
The warning range (marked in red on the scale) is below the end value of the scale. The final scale value on vehicles with gasoline engines is 7000 rpm.

Adjustment for the number of cylinders
An adaptation for the tachometer to the number of cylinders of the engine is not correct.

If implausible CAN messages occur, the needle of the tachometer is moved to the left-hand side of the scale. An error bit is also stored in the fault memory.