Crankshaft Position Sensor

A malfunction in the crankshaft position sensor circuit will set a related diagnostic trouble code. For testing procedures, see TESTS W/CODES article. To diagnose crankshaft position sensor, the following procedures can be used:

1. If a scan tool is available, scan RPM parameter while cranking engine. If RPM is indicated, crankshaft position sensor is operating properly.
2. If scan tool is not available, disconnect crankshaft position sensor harness connector. Set ohmmeter to 2-k/ohm position, and measure resistance across sensor terminals. Resistance should be 700-900 ohms.
3. Set voltmeter on the 2-volt AC scale. Crank engine and measure output voltage across sensor terminals. Voltmeter reading should be .8-1.4 volts. If resistance reading is not as specified or sensor does not produce the specified output voltage reading, repair faulty wiring or faulty crankshaft position sensor.