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Basic Inspection

WARNING: This page is about a different car, the 2005 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  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:
      • 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
      Fig 1: Checking Harness Connectors & Vacuum Hoses
      G02449611Courtesy of NISSAN MOTOR CO., U.S.A.
    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 the middle of gauge.

      Ensure engine stays below 1, 000 rpm.

      Fig 2: Identifying Engine Coolant Gauge Indicator Points
      G02449612Courtesy of NISSAN MOTOR CO., U.S.A.
    5. Run engine at about 2, 000 rpm for about 2 minutes under noload.
      Fig 3: Identifying Engine Running At 2000 RPM
      G02449613Courtesy of NISSAN MOTOR CO., U.S.A.
    6. Make sure that no DTC is displayed with CONSULT-II or GST.

    OK or NG 

    • OK : GO TO  3.
    • NG : GO TO 2.
  2. REPAIR OR REPLACE 

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

    • : GO TO 3.
  3. CHECK TARGET IDLE SPEED 

    With CONSULT-II 

    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 noload, then run engine at idle speed for about 1 minute.
      Fig 4: Running Engine At 2000-3000 RPM
      G02449614Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Read idle speed in "DATA MONITOR" mode with CONSULT-II. Refer to DATA MONITOR MODE .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 
      Fig 5: CONSULT-II Display - DATA MONITOR
      G02449615Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    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.
    3. Check idle speed. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 

    OK or NG 

    • OK : GO TO  10.
    • NG : GO TO 4.
  4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 
    1. Stop engine.
    2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
    • : GO TO 5.
  5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".

    • : GO TO 6.
  6. PERFORM IDLE AIR VOLUME LEARNING 

    Refer to "IDLE AIR VOLUME LEARNING ".

    Is Idle Air Volume Learning carried out successfully? 

    Yes or No 

    • Yes : GO TO 7.
    • No :
      1. Follow the instruction of Idle Air Volume Learning.
      2. GO TO  4.
  7. CHECK TARGET IDLE SPEED AGAIN 

    With CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Read idle speed in "DATA MONITOR" mode with CONSULT-II. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 

    Without CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 

    OK or NG 

    • OK : GO TO  10.
    • NG : GO TO 8.
  8. DETECT MALFUNCTIONING PART 

    Check the following.

    OK or NG 

    • OK : GO TO 9.
    • NG :
      1. Repair or replace.
      2. GO TO  4.
  9. CHECK ECM FUNCTION 
    1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
    2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM - NATS) ".
    • : GO TO  4.
  10. CHECK IGNITION TIMING 
    1. Run engine at idle.
    2. Check ignition timing with a timing light. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 7 +/- 5° BTDC 
      • A/T: 18 +/- 5° BTDC (in P or N position) 
      Fig 6: Identifying Ignition Timing Marks On Crankshaft Pulley
      G02449616Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO  19.
    • NG : GO TO 11.
  11. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 
    1. Stop engine.
    2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
      • : GO TO 12.
  12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Perform "THROTTLE VALVE CLOSED POSITION LEARNING "

    • : GO TO 13.
  13. PERFORM IDLE AIR VOLUME LEARNING 

    Refer to "IDLE AIR VOLUME LEARNING ".

    Is Idle Air Volume Learning carried out successfully? 

    Yes or No 

    • Yes : GO TO 14.
    • No :
      1. Follow the instruction of Idle Air Volume Learning.
      2. GO TO  4.
  14. CHECK TARGET IDLE SPEED AGAIN 

    With CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Read idle speed in "DATA MONITOR" mode with CONSULT-II. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 

    Without CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Check idle speed. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 650 +/- 50 rpm 
      • A/T: 800 +/- 50 rpm (in P or N position) 

    OK or NG 

    • OK : GO TO 15.
    • NG : GO TO  17.
  15. CHECK IGNITION TIMING AGAIN 
    1. Run engine at idle.
    2. Check ignition timing with a timing light. Refer to IDLE SPEED AND IGNITION TIMING CHECK .
      • M/T: 7 +/- 5° BTDC 
      • A/T: 18 +/- 5° BTDC (in P or N position) 
      Fig 7: Identifying Ignition Timing Marks On Crankshaft Pulley
      G02449617Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK : GO TO  19
    • NG : GO TO 16.
  16. CHECK TIMING CHAIN INSTALLATION 

    Check timing chain installation. Refer to "TIMING CHAIN ".

    OK or NG 

    • OK : GO TO 17.
    • NG :
      1. Repair the timing chain installation.
      2. GO TO  4.
  17. DETECT MALFUNCTIONING PART 

    Check the following.

    OK or NG 

    • OK : GO TO 18.
    • NG :
      1. Repair or replace.
      2. GO TO  4.
  18. CHECK ECM FUNCTION 
    1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
    2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to "NVIS (NISSAN VEHICLE IMMOBILIZER SYSTEM - NATS) ".
      • : GO TO  4.
  19. INSPECTION END 

    Did you replace ECM, referring this Basic Inspection procedure?

    Yes or No 

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