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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0133 Through P0453 (Convertible) >> DTC P0340, P0345: CMP Sensor (Phase) >> Diagnosis Procedure
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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 ".)

  2. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace ground connection.

  3. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT
    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.
      DTC CMP sensor (PHASE) Ground Voltage (V)
      Bank Connector Terminal
      P0340 1 F5 1 Ground Approx. 5
      P0345 2 F18 1

      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) GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.
      DTC CMP sensor (PHASE) ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0340 1 F5 2 F102 96 Existed
      P0345 2 F18 2 92
    4. 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 CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.
      DTC CMP sensor (PHASE) ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0340 1 F5 3 F102 59 Existed
      P0345 2 F18 3 63
    2. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  6. CHECK CAMSHAFT POSITION SENSOR (PHASE)

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace malfunctioning camshaft position sensor (PHASE). Refer to "EXPLODED VIEW ".

  7. CHECK CAMSHAFT (INTAKE)

    Check the following.

    • Accumulation of debris to the signal plate of camshaft front end
    • Chipping signal plate of camshaft front end
      Fig 1: Inspecting Camshaft Front End
      G08443803Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 8.

      NO: Remove debris and clean the signal plate of camshaft front end or replace camshaft. Refer to "EXPLODED VIEW ".

  8. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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