Odometer: Description and Operation

Instrument Cluster:

This instrument cluster assembly includes a speedometer, an odometer and a trip meter. Speedometer indicates speed. Odometer records total road mileage. Trip meter records trip mileage. Indicator needle is electrically driven by a precision DC motor circuit. Speed information source is a speed sensor on transmission. Odometer and Trip meters consist of numbered wheels that are electrically driven by a DC stepper motor.



Circuit Operation

ODO/Trip Meter
Battery voltage is always applied to the ODO/Trip meter through the "MEMORY ROOM (15 A)" fuse and the wire "Y/L", whose circuit is grounded permanently through terminal 1K (B) of C-01. As the wheels are turned, an electrical pulse signal is sent for the vehicle speed sensor to the ODO/Trip meter assembly. The meter registers the driving distance of one mile per 4,110 pulse signals of the vehicle speed sensor.