Vehicle Speed Sensor Check

Remove the vehicle speed sensor and connect a 3 - 10 kΩ resistor as shown in the illustration.
Turn the shaft of the vehicle speed sensor and check that there is voltage between terminals 2 - 3. (1 turn = 4 pulses)
1. Standard value: 0 or Battery Voltage (1 turn = 4 pulses)
If within the standard value, the vehicle speed sensor is OK.
If not within the standard value, replace the vehicle speed sensor.

Fig 1: Measuring Voltage Between Terminals 2 And 3
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.