Transaxle Revolution Sensor
WARNING: This page is about a different car, the 2002 Nissan Sentra, 2002 Infiniti G20, 2001 Nissan Sentra, and 2001 Infiniti G20. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect A/T revolution sensor connector. See Figure. Measure resistance between terminals No. 2 and 3 on revolution sensor harness connector (transaxle side). Resistance should be 500-650 ohms. If resistance is not as specified, replace sensor.