Crankshaft Position Sensor: Testing and Inspection

CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [LF]

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation

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 crankshaft pulley. Removal and Replacement
- If the monitor item condition/specification (reference) is not within the specification, even though there is no malfunction, carry out the "Circuit Open/Short Inspection".

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

Visual inspection

1. Remove the battery cover.

2. Disconnect the negative battery cable. Removal and Replacement

3. Remove the CKP sensor. Service and Repair

4. Verify that there are no metal shavings on the sensor.

- If the monitor item condition/specification (reference) is without the specification even though there is no malfunction, carry out the "Circuit Open/Short Inspection".

Voltage Inspection

1. Install all removed parts.

2. Measure the CKP sensor output wave pattern using an oscilloscope. Component Tests and General Diagnostics

- If not within the specification, replace the CKP sensor. Service and Repair
- If the monitor item condition/specification (reference) is without the specification, even though the CKP sensor output wave pattern is within the specification, carry out the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection









1. Disconnect the PCM connector. Service and Repair

2. Inspect the following wiring harnesses for an open or short circuit. (Continuity Inspection)

Open circuit

- If there is no continuity, the circuit is open. Repair or replace the wiring harness.

- CKP sensor terminal A and PCM terminal 2AB
- CKP sensor terminal B and PCM terminal 2W
- CKP sensor terminal C and PCM terminal 2AQ

Short circuit

- If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

- CKP sensor terminal A and power supply
- CKP sensor terminal B and power supply
- CKP sensor terminal B and body ground
- CKP sensor terminal C and body ground