Crankshaft Position Sensor: Testing and Inspection

1. With ignition Off, disconnect electrical connector from coolant switch.
2. Connect an ohmmeter to switch. Connect one probe to a ground and other probe to coolant switch terminal.
3. On a cold engine, there should be continuity. If not, replace switch.
4. On a hot engine (at normal operating temperature), there should be no continuity. If there is continuity, replace switch.