Inspection of Individual Part

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Remove the VSS. (See VEHICLE SPEEDOMETER SENSOR (VSS) REMOVAL/INSTALLATION .)
Measure resistance between the terminals of the VSS speed sensor.
- If not as specified, replace the VSS.
- If it is normal, replace the harness.
Fig 1: Measuring Resistance Between Terminals Of VSS Speed Sensor
Courtesy of MAZDA MOTORS CORP.

Resistance (ATF temperature: 20 °C {68 °F}) 513-627 ohms
Install the VSS. (See VEHICLE SPEEDOMETER SENSOR (VSS) REMOVAL/INSTALLATION .)