P0340

P0340, P0345 CMP SENSOR (PHASE)

DTC Logic


DTC DETECTION LOGIC

NOTE:
If DTC P0340 or P0345 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to "DTC Logic" P0643.






DTC CONFIRMATION PROCEDURE


1. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
1.Turn ignition switch OFF and wait at least 10 seconds.
2.Turn ignition switch ON.
3.Turn ignition switch OFF and wait at least 10 seconds.
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-I

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- Proceed to "Diagnosis Procedure" .
NO- GO TO 3.

3. PERFORM DTC CONFIRMATION PROCEDURE-I

1.Maintaining engine speed at more than 800 rpm for at least 5 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK STARTING SYSTEM

Turn ignition switch to START position.
Does the engine turn over? Does the starter motor operate?
YES- GO TO 2.
NO- Check starting system. (Refer to "Work Flow (With GR8-1200 NI)" Work Flow (With GR8-1200 NI)

Revision: March 20122013 Infiniti JX

2. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY

1.Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
2.Turn ignition switch ON.
3.Check the voltage between CMP sensor (PHASE) harness connector and ground.





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

3. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

4. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT

1.Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.





2.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 5.
NO- Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK CAMSHAFT POSITION SENSOR (PHASE)

Check camshaft position sensor (PHASE). Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 6.
NO- Replace malfunctioning camshaft position sensor (PHASE). Refer to "Exploded View" Exploded View.

6. CHECK CAMSHAFT (INT)

Check the following.
Revision: March 20122013 Infiniti JX





- Accumulation of debris to the signal plate of camshaft rear end
- Chipping signal plate of camshaft rear end
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to "Exploded View" Exploded View.


Component Inspection


1. CHECK CAMSHAFT POSITION SENSOR (PHASE)-I

1.Turn ignition switch OFF.
2.Loosen the fixing bolt of the sensor.
3.Disconnect camshaft position sensor (PHASE) harness connector.
4.Remove the sensor.





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

2. CHECK CAMSHAFT POSITION SENSOR (PHASE)-II

Check the resistance camshaft position sensor (PHASE) terminals as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace malfunctioning camshaft position sensor (PHASE). Refer to "Exploded View" Exploded View.
Revision: March 20122013 Infiniti JX