System Operation: Tachometer
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The PCM uses the CKP sensor to measure the engine Revolutions Per Minute (RPM). The IPC uses the engine Revolutions Per Minute (RPM) data message from the PCM to control the tachometer.
The base and optional IPC tachometers appear differently but function the same. The base IPC uses an analog gauge. The optional IPC uses a digital display that provides a 6, 000 Revolutions Per Minute (RPM) bar graph or a simulated 7, 000 Revolutions Per Minute (RPM) analog gauge display depending on the selected display mode.