Circuit Operation

The ignition switch (IG1) circuit is the power source for the speedometer and vehicle speed sensor < M/T > or output shaft speed sensor < A/T >.
The vehicle speed sensor < M/T > or output shaft speed sensor < A/T > are installed on the transaxle. Four pulses are generated with one turn of the vehicle speed sensor shaft. In case of M/T, these pulse signals are sent into the speedometer. and in case of A/T, these pulse signals are sent into the PCM and sent into the speedometer. The speedometer calculates the pulse signals, and operates the indicator. At the same time, the travel distance is calculated.