Crankshaft Position Sensor: Testing and Inspection

Sender Terminal Identification:

RESISTANCE TEST
- Disconnect the sensor harness connector.
- Measure the resistance between terminal 1 and 2 of the sensor.

Resistance should be 540 ± 50 ohms.

- Measure the resistance between terminals (1 and 3) and terminals (2 and 3).

Resistance should be Greater than 100 K ohms.

If the correct measurements are not obtained, replace the sensor.

DYNAMIC TEST
- Disconnect the sensor harness connector.
- Connect an oscilloscope between terminal 1 and 2 of the sensor connector.
- Crank the engine.

Oscilloscope Display:

- If the oscilloscope pattern does not resemble the reference pattern, check for:

a. Improper positioning, debris, or damaged sensor. Distance between sensor and increment wheel = 1.0 mm ± 0.3 mm.
b. Damaged increment wheel or vibration damper.

If the increment wheel is OK and the sensor is properly installed, replace the sensor.