Vehicle Speed Sensor (VSS) Input Test
- Disconnect 3-pin connector from speed sensor, located on right side of engine. Using DVOM, check for continuity between Black wire and ground. If continuity exists, go to next step. If continuity does not exist, check for open in Black wire. Check for poor ground connection. Repair as necessary.
- Turn ignition on. Using DVOM, check voltage between Yellow wire and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check for short to ground in Yellow wire. Check for blown fuse No. 1 (10-amp) in underdash fuse/relay box. Repair or replace as necessary.
- Ensure ignition is on. Check voltage between Orange wire and ground. If reading is about 5 volts, system is operating properly. If reading is not about 5 volts, check for open or short to ground in Orange wire.