Component Tests and General Diagnostics
CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L3]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.
CKP sensor air gap
0.5-1.4mm {0.02-0.05 in}
Visual Inspection
1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Perform the following procedure for easier access.
1. Remove the under cover.
2. Remove the splash shield.
4. Disconnect the CKP sensor connector.
5. Remove the CKP sensor.
6. Verify that there are no metal shavings on the CKP sensor.
- If there is a malfunction, replace the CKP sensor.
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 within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection", and repair or replace the malfunctioning part.
CKP sensor voltage
CKP Sensor Voltage:
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- CKP sensor terminal A and PCM terminal body ground
- CKP sensor terminal B and PCM terminal 2W
- CKP sensor terminal C and PCM terminal 2AQ
Short circuit
- If there is continuity, there is a short circuit. 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