Engine Controls

P0335 CKP SENSOR (POS)

Description






The crankshaft position sensor (POS) is located on the oil pan facing the gear teeth (cogs) of the signal plate. It detects the fluctuation of the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to change.
Due to the changing magnetic field, the voltage from the sensor changes.
The ECM receives the voltage signal and detects the fluctuation of the engine revolution.
ECM receives the signals as shown in the figure.







DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V with ignition switch ON.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Go to Diagnosis Procedure (see below).
NO- INSPECTION END


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection E21. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.

2. CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-I

1.Disconnect crankshaft position (CKP) sensor (POS) harness connector.
2.Turn ignition switch ON.
3.Check the voltage between CKP sensor (POS) harness connector and ground.





Is the inspection result normal?
YES- GO TO 8.
NO- GO TO 3.

3. CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT-II

1.Turn ignition switch ON.
2.Disconnect ECM harness connector.
3.Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair open circuit.

4. CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair short to ground or short to power in harness or connectors.

5. CHECK REFRIGERANT PRESSURE SENSOR

Component Test.
Is the inspection result normal?
YES- GO TO 6.
NO- Replace malfunctioning components.

6. CHECK APP SENSOR

Engine Controls.
Is the inspection result normal?
YES- GO TO 12.
NO- GO TO 7.

7. REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly. Removal And Installation.
- INSPECTION END

8. CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT

1.Turn ignition switch OFF.
2.Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.





3.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair open circuit or short to ground or short to power in harness or connectors.

9. CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.Disconnect ECM harness connector.
2.Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.





3.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 10.
NO- Repair open circuit or short to ground or short to power in harness or connectors.

10. CHECK CRANKSHAFT POSITION SENSOR (POS)

.
Is the inspection result normal?
YES- GO TO 11.
NO- Replace crankshaft position sensor (POS). Exploded View.

11. CHECK GEAR TOOTH

Visually check for chipping signal plate gear tooth.
Is the inspection result normal?
YES- GO TO 12.
NO- Replace the signal plate. Exploded View.

12. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK CRANKSHAFT POSITION SENSOR (POS)-I

1.Turn ignition switch OFF.
2.Loosen the fixing bolt of the sensor.
3.Disconnect crankshaft position sensor (POS) harness connector.
4.Remove the sensor. Exploded View.





5.Visually check the sensor for chipping.
Is the inspection result normal?
YES- GO TO 2.
NO- Replace crankshaft position sensor (POS). Refer to EM91, "Exploded View".

2. CHECK CRANKSHAFT POSITION SENSOR (POS)-II

Check resistance between crankshaft position sensor (POS) terminals as follows.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace crankshaft position sensor (POS). Exploded View.