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Home › Infiniti › 2021 › Q50 Signature Edition, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System (DTCS) (3 Of 6) › Engine (ECM) › P0345 CMP Sensor › DTC Diagnosis Procedure › VR30DDTT engine

VR30DDTT engine

  1. CHECK DTC PRIORITY 

    If DTC P0345 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Description .

    NO

    GO TO 2.

  2. CHECK STARTING SYSTEM 

    Turn ignition switch to START position.

    Does the engine turn over? Does the starter motor operate?

    YES

    GO TO 3.

    NO

    Check starting system. Refer to Work Flow For details, Refer to STARTING SYSTEM : Preparation ).

  3. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection E191. Refer to Ground Inspection in Inspection .

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace ground connection.

  4. CHECK INTAKE CAMSHAFT POSITION SENSOR POWER SUPPLY 
    1. Disconnect intake camshaft position sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between intake camshaft position sensor harness connector and ground.

      Intake camshaft position sensor

      Ground

      Voltage (V)

      Bank

      Connector

      Terminal

      2

      F97

      1

      Ground

      Approx. 5

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    P0345: GO TO 5.

  5. CHECK INTAKE CAMSHAFT POSITION SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

      Intake camshaft position sensor

      ECM

      Continuity

      Bank

      Connector

      Terminal

      Connector

      Terminal

      2

      F97

      1

      F143

      60

      Existed

    Is the inspection result normal?

    YES

    Check sensor power supply 2 circuit. Refer to Diagnosis Procedure .

    NO

    Repair or replace error-detected parts.

  6. CHECK INTAKE CAMSHAFT POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

      Intake camshaft position sensor

      ECM

      Continuity

      Bank

      Connector

      Terminal

      Connector

      Terminal

      2

      F97

      2

      F143

      76

      Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Repair open circuit, short to ground or short to power in harness or connectors.

  7. CHECK INTAKE CAMSHAFT POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

      Intake camshaft position sensor

      ECM

      Continuity

      Bank

      Connector

      Terminal

      Connector

      Terminal

      2

      F97

      3

      F143

      67

      Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Repair open circuit, short to ground or short to power in harness or connectors.

  8. CHECK CAMSHAFT POSITION SENSOR 

    Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Replace malfunctioning camshaft position sensor. Refer to CAMSHAFT : Exploded View .

  9. CHECK CAMSHAFT (INTAKE) 

    Check the following.

    BANK 1

    • Accumulation of debris to the signal plate of camshaft rear end
    • Chipping signal plate of camshaft rear end
      GNSJSBIB0445GB-445Courtesy of NISSAN NORTH AMERICA, INC.

    BANK 2

    • Accumulation of debris to the signal plate of camshaft rear end
    • Chipping signal plate of camshaft rear end
      GNSJSBIB0431GB-431Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to CAMSHAFT : Exploded View .

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