Crankshaft Position Sensor: Testing and Inspection

CRANKSHAFT POSITION SENSOR
The crankshaft position sensor which consist of a magnet and coil is installed by the flywheel.

The voltage signal from this crankshaft position sensor is provided to the ECM for detecting the engine RPM and position of crankshaft.

Circuit Diagram:

Troubleshooting Procedures:

TROUBLESHOOTING HINTS
1. If unexpected misses are felt during driving or the engine stalls suddenly, shake the crankshaft position sensor harness. If this causes the engine to stall, check for poor contact at the sensor connector.
2. If the tachometer reads 0 rpm when the engine is cranked, check for faulty crankshaft position sensor or ignition system problems.
3. If the tachometer reads 0 rpm when the engine is cranked and it does not start, ignition coil, power TR, or an ECM defect can be considered.
4. Engine can be stalled when the crankshaft position sensor cable is close to the high voltage cable due to the electronic noise caused by the high voltage induced.

Harness Inspection Procedures:

SENSOR INSPECTION
1. Disconnect the crankshaft position sensor connector.
2. Measure the resistance between terminal 2 and 3.
Standard value : 0.486 - 0.594 kohm at 20 °C (68 °F)
3. If the resistance deviates far from the standard value, replace the sensor.

Standard value
Clearance between the crankshaft position sensor and crankshaft position sensor wheel : 0.5 - 1.5 mm (0.020 - 0.059 in.)

Tightening torque
Crankshaft position sensor : 4 - 6 Nm (40 - 60 kg.cm, 2.9 - 4.3 lb.ft)