Vehicle Speed Sensor (VSS)

Disconnect VSS electrical connector. Using DVOM, measure resistance across sensor terminals. Resistance should be 190-250 ohms. Replace sensor if not within specification. Faults in VSS sensor or circuit should set a service code. See QUICK TEST in appropriate TESTS W/CODES - EEC-IV article in the ENGINE PERFORMANCE section. If no service code has been set, see CIRCUIT TEST DP in appropriate TESTS W/CODES - EEC-IV article for additional sensor testing and specifications.