FixVault
Home › Nissan-Datsun › 2017 › Qashqai SV, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System (Introduction, Wiring Diagrams And Basic Inspection) › Basic Inspection › Basic Inspection › Work Procedure › Diagnostic Test

Diagnostic Test

  1. INSPECTION START

    1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
    2. Open engine hood and check the following:
      G04074533Courtesy of NISSAN NORTH AMERICA, INC.
      • Harness connectors for improper connections
      • Wiring harness for improper connections, pinches and cut
      • Vacuum hoses for splits, kinks and improper connections
      • Hoses and ducts for leaks
      • Air cleaner clogging
      • Gasket
    3. Confirm that electrical or mechanical loads are not applied.
      • Headlamp switch is OFF.
      • Air conditioner switch is OFF.
      • Rear window defogger switch is OFF.
      • Steering wheel is in the straight-ahead position, etc.
    4. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

      Ensure engine stays below 1, 000 rpm.

    5. Run engine at about 2, 000 rpm for about 2 minutes under no load.
      G04074535Courtesy of NISSAN NORTH AMERICA, INC.
    6. Make sure that no DTC is displayed with CONSULT or Diagnostic Test Mode II (self-diagnostic results).

    Is any DTC detected?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 3  .

  2. REPAIR OR REPLACE

    Repair or replace components as necessary according to corresponding Diagnostic Procedure.

    GO TO STEP 3  .

  3. CHECK TARGET IDLE SPEED

    1. Run engine at about 2, 000 rpm for about 2 minutes under no load.
    2. Rev engine (2, 000 to 3, 000 rpm) two or three times under no load, then run engine at idle speed for about 1 minute.
      G04074536Courtesy of NISSAN NORTH AMERICA, INC.
    3. Check idle speed.

      For procedure, refer to INSPECTION .

      For specification, refer to IDLE SPEED .

    Is the inspection result normal?

    YES 

    GO TO STEP  10.

    NO 

    GO TO STEP 4  .

  4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

    1. Stop the engine.
    2. Perform accelerator pedal released position learning. Refer to DESCRIPTION .

    GO TO STEP 5  .

  5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

    Perform throttle valve closed position learning. Refer to DESCRIPTION .

    GO TO STEP 6  .

  6. PERFORM IDLE AIR VOLUME LEARNING

    Perform idle air volume learning. Refer to DESCRIPTION .

    Is Idle Air Volume Learning carried out successfully?

    YES 

    GO TO STEP 7  .

    NO 

    Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO STEP  4.

  7. CHECK TARGET IDLE SPEED AGAIN

    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed.

      For procedure, refer to INSPECTION .

      For specification, refer to IDLE SPEED .

    Is the inspection result normal?

    YES 

    GO TO STEP 10  .

    NO 

    GO TO STEP 8  .

  8. DETECT MALFUNCTIONING PART

    Check the Following.

    • Check camshaft position sensor and circuit. Refer to DTC DESCRIPTION .
    • Check exhaust valve timing control position sensor and circuit. Refer to DTC DESCRIPTION .
    • Check crankshaft position sensor and circuit. Refer to DTC DESCRIPTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Repair or replace. Then GO TO STEP  4.

  9. CHECK ECM FUNCTION

    Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)

    GO TO STEP  4.

  10. CHECK IGNITION TIMING

    1. Run engine at idle.
    2. Check ignition timing with a timing light.
      GNSJMBIA0315ZZ-315Courtesy of NISSAN NORTH AMERICA, INC.
      MARU-A-W : Timing indicator

      For procedure, refer to INSPECTION .

      For specification, refer to IGNITION TIMING .

    Is the inspection result normal?

    YES 

    GO TO STEP  19.

    NO 

    GO TO STEP 11  .

  11. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

    1. Stop the engine.
    2. Perform accelerator pedal released position learning. Refer to DESCRIPTION .

    GO TO STEP 12  .

  12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

    Perform throttle valve closed position learning. Refer to DESCRIPTION .

    GO TO STEP 13  .

  13. PERFORM IDLE AIR VOLUME LEARNING

    Perform idle air volume learning. Refer to DESCRIPTION .

    Is Idle Air Volume Learning carried out successfully?

    YES 

    GO TO STEP 14  .

    NO 

    Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO STEP  4.

  14. CHECK TARGET IDLE SPEED AGAIN

    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed.

      For procedure, refer to INSPECTION .

      For specification, refer to IDLE SPEED .

    Is the inspection result normal?

    YES 

    GO TO STEP 15  .

    NO 

    GO TO STEP 17  .

  15. CHECK IGNITION TIMING AGAIN

    1. Run engine at idle.
    2. Check ignition timing with a timing light.
      GNSJMBIA0315ZZ-315Courtesy of NISSAN NORTH AMERICA, INC.
      MARU-A-W : Timing indicator

      For procedure, refer to INSPECTION .

      For specification, refer to IGNITION TIMING .

    Is the inspection result normal?

    YES 

    GO TO STEP  19.

    NO 

    GO TO STEP 16  .

  16. CHECK TIMING CHAIN INSTALLATION

    Check timing chain installation. Refer to REMOVAL AND INSTALLATION .

    Is the inspection result normal?

    YES 

    GO TO STEP 17  .

    NO 

    Repair the timing chain installation. Then GO TO STEP  4.

  17. DETECT MALFUNCTIONING PART

    Check the Following.

    • Check camshaft position sensor and circuit. Refer to DTC DESCRIPTION .
    • Check exhaust valve timing control position sensor and circuit. Refer to DTC DESCRIPTION .
    • Check crankshaft position sensor and circuit. Refer to DTC DESCRIPTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 18  .

    NO 

    Repair or replace. Then GO TO STEP 4  .

  18. CHECK ECM FUNCTION

    Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)

    GO TO STEP  4.

  19. INSPECTION END

    If ECM is replaced during this BASIC INSPECTION procedure, perform DESCRIPTION .

    INSPECTION END

About FixVault