System Description: Tachometer
WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
The tachometer indicates engine speed in revolutions per minute (rpm).
- ECM converses a signal from crankshaft position sensor to engine speed signal, and transmits to unified meter and A/C amp. with CAN communication.
- Unified meter and A/C amp. transmits engine speed signal to combination meter with communication line.
- Combination meter converses engine speed signal to the angle signal, and commands to tachometer.