S2000 L4-1997cc 2.0L DOHC (VTEC) MFI (2001)
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Speedometer Head: Description and Operation
How the Gauges and Indicators Circuit Works
The indicator lights are controlled by different conditions in their associated systems.
Speedometer and Odometer
The speedometer and odometer (part of the LCD display) are controlled by the CPU in the gauge assembly. The CPU receives a pulsing input from the
vehicle speed sensor. The pulse rate increases as the car accelerates. The frequency and duration of these input pulses are measured by the CPU. The
CPU controls the LCD display to turn on the proper segments indicating the vehicles speed and mileage.