System Description: Tachometer

WARNING: This page is about a different car, the 2007 Nissan Quest. 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 provides an engine speed signal to combination meter via CAN communication lines.

Fig 1: Communication Diagram Between ECM And Combination Meter (Tachometer)

Courtesy of NISSAN MOTOR CO., U.S.A.