MAZDA6 (Without ABS) & Miata (M/T)
WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle Speed Sensor (VSS) is located on side of transmission. Disconnect negative battery cable. Disconnect VSS harness connector. Remove VSS. Using analog voltmeter, measure voltage between sensor terminals while rotating gear on VSS. Voltmeter needle should fluctuate between zero and 5 volts. See Fig 1. If voltmeter needle does not fluctuate, replace VSS.