Inspect Vehicle Speed Sensor Operation

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 2.

Fig 1: Testing Vehicle Speed Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the positive (+) lead from the tester to terminal 3 and the negative (-) lead to terminal 2.
Rotate the shaft.

NOTE: The voltage change should be performed 4 times for every revolution of the speed sensor shaft.

Check that there is voltage change from approx. 0 volts to 16 volts or more between terminals 2 and 3.
If operation is not as specified, replace the sensor.