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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (2 Of 4)) >> DTC/Circuit Diagnosis >> DTC P0340: CMP Sensor >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  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 165-DSS-5000P) or Work Flow (Without 165-DSS-5000P).]

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

      +

      -

      Voltage

      (Approx.)

      CMP sensor

      Connector

      Terminal

      F55

      1

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 3.

  3. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Perform Diagnosis Procedure .

    Is inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  4. CHECK CMP SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between CMP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      CMP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F55

      2

      F91

      19

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace error-detected parts.

  5. CHECK CMP SENSOR INPUT SIGNAL CIRCUIT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between CMP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      CMP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F55

      3

      F91

      20

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

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK CAMSHAFT POSITION SENSOR 

    Check the camshaft position sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Replace camshaft position sensor. Refer to Removal and Installation .

  7. CHECK CAMSHAFT (INT) 

    Check the following.

    • Accumulation of debris to the signal plate of camshaft rear end
      GNSJSBIB1245Z-245Courtesy of NISSAN NORTH AMERICA, INC.
    • Chipping signal plate of camshaft rear end

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to Removal and Installation .

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