Crankshaft Position Sensor: Testing and Inspection

Figure 3-20: Crankshaft Position Sensor Circuit:

A sensor fault will cause a "crank reference missed" reading to occur. The scan tool will display the number of reference pulses missed. Normal reading is zero.

If a sensor fault occurs, check the sensor wiring and connectors for shorts, opens, grounds, or loose connectors (Figure 3-20).

Sensor Test
1. Disconnect wires at fuel shut-off solenoid.
2. Connect voltmeter between PCM terminal BRA5 and ground and crank engine.
- If meter indicates 5 volts, sensor is OK.
- If meter indicates less than 5 volts or zero volts, check 5 volt reference at PCM terminal BRD13.
- If 5 volt reference is OK, problem is bad connection or failed sensor.