Crankshaft Position Sensor: Testing and Inspection

CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L5]

Air Gap Inspection

1. Verify that the CKP sensor is securely installed.

2. Using a thickness gauge, measure the air gap between the plate projections at the back of crankshaft pulley and the CKP sensor.

- If not within the specification, inspect the plate projections for cracks or bending.

- If there is any malfunction, replace the plate.

Air gap
- 0.5-1.5 mm {0.02-0.05 in}

Visual inspection

CAUTION:
- Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.

1. Idle the engine.

2. Measure the crankshaft position signal and verify that rectangular waves are produced.
Component Tests and General Diagnostics

3. If not as specified, replace the CKP sensor.
Service and Repair

Voltage Inspection

1. Idle the engine.

CAUTION:
- Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.

2. Measure the output voltage using a oscilloscope.






- If not as specified, replace the CKP sensor.
Service and Repair
Voltage





*
Output voltage varies with crankshaft rotation.