Engine rpm display function - GF54.30-P-3021S

Model 215, 220 

Networking of components 

Fig 1: Networking Of Components For Engine RPM Display

Networking, valid as of 01.9.02:

• Engine speed is registered by the crankshaft position sensor (L5). The signals from the crankshaft position sensor (L5) are read in by the motor electronics control unit (N3/10) or the CDI control unit (N3/9) and are transferred to the engine compartment CAN as a message (in rpm). The instrument cluster (A1) receives this message and actuates the stepper motor of the tachometer (A1p5) relative to the engine speed.

Adaptation to number of cylinders

It is not necessary to adapt the tachometer (A1p5) to the number of cylinders in the engine.

If implausible CAN values occur, the pointer of the tachometer (A1p5) is moved to the left-hand end of the scale. An error bit is also stored in the fault memory.

Warning range:

The warning range (marked red on the scale) commences at Vehicles with

• gasoline engines at 6000 rpm,
• diesel engines at 4600 rpm.