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HOMESERVICE MANUALSNISSAN-DATSUN2009XTERRA SE, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - COMPONENT TESTINGFUEL INJECTORDIAGNOSIS PROCEDURE
2009 Nissan-Datsun Xterra SE, 4WD

Diagnosis Procedure

2009 Nissan-Datsun Xterra SE, 4WDSECTION Diagnosis Procedure
  1. INSPECTION START

    Turn ignition switch to START.

    Are any cylinders ignited? 

    Yes or No 

    Yes (With CONSULT-III) : GO TO 2.

    Yes (Without CONSULT-III) : GO TO  3.

    No : GO TO  7.

  2. CHECK OVERALL FUNCTION

    With CONSULT-III 

    1. Start engine.
    2. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
    3. Make sure that each circuit produces a momentary engine speed drop.

    OK or NG 

    OK : INSPECTION END 

    NG : GO TO  7.

  3. CHECK FUNCTION OF FUEL INJECTOR-I

    Without CONSULT-III 

    1. Stop engine.
    2. Disconnect harness connector F44 (3), F201 (1)
      Fig 1: Identifying Vacuum Tank, Harness Connector F44 And F201
      G05927414Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Turn ignition switch ON.
    4. Check voltage between harness connector F44 terminal 3 and ground with CONSULT-III or tester.

      Voltage: Battery voltage 

    5. Turn ignition switch OFF.
    6. Disconnect ECM harness connector.
    7. Check harness continuity between harness connector F44 and ECM as follows.

      Refer to WIRING DIAGRAM .

      Fig 2: Checking Voltage Between Harness Connector F44 Terminal 3 And Ground
      G04896952Courtesy of NISSAN MOTOR CO., U.S.A.
      VOLTAGE REFERENCE CHART

      Cylinder Harness connector F44 terminal ECM terminal
      1 2 23
      3 1 22
      5 4 21

      Continuity should exist. 

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

    OK or NG 

    OK : GO TO  5.

    NG : GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E2, F32
    • IPDM E/R harness connector E119
    • 15 A fuse (No. 55)
    • Harness for open or short between harness connector F44 and fuse
    • Harness for open or short between harness connector F201 and fuel injector

    Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK FUNCTION OF FUEL INJECTOR-II

    Provide battery voltage between harness connector F201 as follows and then interrupt it. Listen to each fuel injector operating sound.

    VOLTAGE REFERENCE CHART

    Cylinder Harness connector F201 terminal
    (+) (-)
    1 3 2
    3 3 1
    5 3 4

    Operating sound should exist. 

    Fig 3: Checking Voltage Between Battery Connector Terminals
    G04896953Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO 6.

    NG : GO TO  7.

  6. CHECK FUNCTION OF FUEL INJECTOR-III
    1. Reconnect all harness connector disconnected.
    2. Start engine.
    3. Listen to fuel injectors No. 2, No. 4, No. 6 operating sound.

    Clicking noise should exist. 

    Fig 4: Checking Fuel Injector
    G04900354Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : INSPECTION END 

    NG : GO TO 7.

  7. CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect fuel injector harness connector.
      Fig 5: Identifying Fuel Injector Harness Connector
      G04897401Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Turn ignition switch ON.
    4. Check voltage between fuel injector terminal 1 and ground with CONSULT-III or tester.

    Voltage: Battery voltage 

    Fig 6: Checking Voltage Between Fuel Injector Terminal 1 And Ground
    G04900780Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : GO TO  9.

    NG : GO TO 8.

  8. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E2, F32
    • Harness connectors F44, F201
    • IPDM E/R harness connector E119
    • 15 A fuse (No. 55)
    • Harness for open or short between fuel injector and fuse

    Repair harness or connectors.

  9. CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

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

    OK or NG 

    OK : GO TO  11.

    NG : GO TO 10.

  10. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F201, F44
    • Harness for open or short between fuel injector and ECM

    Repair open circuit or short to ground or short to power in harness or connectors.

  11. CHECK FUEL INJECTOR

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK : GO TO 12.

    NG : Replace fuel injector.

  12. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.