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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECTION START 

    Turn ignition switch to START.

    Is any cylinder ignited? 

    Yes or No 

    1. Yes (With CONSULT-II) : GO TO 2.
    2. Yes (Without CONSULT-II) : GO TO  3.
    3. No : GO TO  4.
  2. CHECK OVERALL FUNCTION 

    With CONSULT-II 

    1. Start engine.
    2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-II.
    3. Make sure that each circuit produces a momentary engine speed drop.
      Fig 1: ACTIVE TEST - CONSULT-II Display
      G03593505Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : INSPECTION END 
    2. NG : GO TO  4.
  3. CHECK FUNCTION OF INJECTOR 

    Without CONSULT-II 

    1. Start engine.
    2. Listen to each injector operating sound.

      Clicking noise should exist  .

    OK or NG 

    1. OK : INSPECTION END 
    2. NG : GO TO 4.
      Fig 2: Checking Injector Function
      G03593506Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK INJECTOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect injector harness connector.
      Fig 3: Disconnecting Injector Harness Connector
      G03593507Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Turn ignition switch ON.
    4. Check voltage between injector terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    1. OK : GO TO  6.
    2. NG : GO TO 5.
      Fig 4: Checking Voltage Between Injector Terminal 1 And Ground
      G03593508Courtesy of NISSAN MOTOR CO., U.S.A.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E2, F32
    • Harness connectors F44, F101
    • IPDM E/R harness connector E119
    • 15A fuse
    • Harness for open or short between injector and fuse
    1. : Repair harness or connectors.
  6. CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between injector terminal 2 and ECM terminals 22, 23, 41, 42. Refer to WIRING DIAGRAM .

      Continuity should exist  .

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

    OK or NG 

    1. OK : GO TO  8.
    2. NG : GO TO 7.
  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F101, F44
    • Harness for open or short between injector and ECM
    1. : Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK INJECTOR 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    1. OK : GO TO 9.
    2. NG : Replace injector.
  9. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    1. : INSPECTION END 
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