Revolution Sensor

Disconnect revolution sensor connector. See Figure. Measure resistance between revolution sensor harness connector terminals No. 2 and 3. See Figure. Resistance should be 500-650 ohms.

Connect scan tool to DLC. Monitor pulse frequency of revolution sensor. With vehicle speed of 12 MPH, revolution sensor output frequency should be 450 Hz. If resistance or frequency measurements are not as specified, replace sensor. See REVOLUTION SENSOR  under REMOVAL & INSTALLATION.