Crankshaft Position Sensor (Dis)
Disconnect crankshaft sensor harness connector. Set ohmmeter to 2K position, measure resistance across sensor terminals. Resistance should be 900-1200 ohms. Set voltmeter on the 2-volt AC scale. Crank engine and measure voltage across sensor terminals. See the Voltmeter reading should be .1 volt or greater. If resistance reading is not as specified or sensor does not produce a voltage reading, repair faulty wiring or crank sensor.
NOTE:
The following table contains information updated as per Technical Service Bulletin Numbers 89-6E-28 (Buick) and 90-168-6E (Chevrolet).
NORMAL CRANK SENSOR VOLTAGE OUTPUT RANGE (3.1L VIN "T")
| Application | Specification |
|---|---|
| Room Temperature/Charged Battery | .8-1.4 Volts (800-1400 mV) |
| Slow Cranking/Low Battery | .3 Volt (300 mV) |