Vehicle Speed Pulse Signal

The vehicle speed pulse signal is outputted by the vehicle speed pulse (VSP) sensor ¹ or PCM ² . The VSP sensor is driven by the differential gear. For every revolution of the sensor, a four-pulse signal is sent to the navigation unit. The PCM receives the signal which is outputted by the counter shaft speed sensor, then the PCM process the signal and transmit the signal to the speedometer and other system.

Fig 1: Identifying Vehicle Speed Pulse Signal Circuit

Courtesy of AMERICAN HONDA MOTOR CO., INC.