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Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECTION START

    Check the case in which DTC is detected.

    • Case1: It is detected when Intelligent Key is inserted into key slot.
    • Case2: It is detected after Intelligent Key is inserted into key slot and push-button ignition switch is pressed.

      In which case is DTC detected? 

      Case1.: GO TO 2

      Case2.: GO TO  4

  2. CHECK KEY SLOT INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect key slot harness connector.
    3. Check voltage between key slot harness connector and ground.
      VOLTAGE REFERENCE CHART

      Key slot Ground Voltage [V] (approx.)
      Connector Terminal
      M40 2 Ground Battery voltage
      Fig 1: Checking Voltage Between Key Slot Harness Connector And Ground
      G05876355Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Replace key slot. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 3

  3. CHECK KEY SLOT CIRCUIT
    1. Disconnect BCM harness connector.
    2. Check continuity between key slot harness connector M40 (A) terminal 2 and BCM harness connector M19 (B) terminal 68.
      CONTINUITY REFERENCE CHART

      Key slot BCM Continuity
      Connector Terminal Connector Terminal
      A: M40 2 B: M19 68 Yes
    3. Check continuity between key slot harness connector M40 (A) terminal 2 and ground.
      Fig 2: Checking Continuity Between Key Slot Harness Connector M40 Terminal 2 And Ground
      G05876356Courtesy of NISSAN MOTOR CO., U.S.A.
      CONTINUITY REFERENCE CHART

      Key slot Ground Continuity
      Connector Terminal
      A: M40 2 Ground No

      Is the inspection result normal? 

      YES: GO TO  8

      NO: Repair harness or connector.

  4. CHECK PUSH-IGNITION SWITCH OPERATION

    Press push-button ignition switch and check if it turns ON.

    Does ignition switch turn to ON? 

    YES: GO TO 5

    NO: GO TO  7

  5. CHECK KEY SLOT COMMUNICATION SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect key slot harness connector.
    3. Check voltage between key slot harness connector and ground.
      CONTINUITY REFERENCE CHART

      Key slot Ground Continuity
      Connector Terminal
      M40 3 Ground Yes
      Fig 3: Checking Voltage Between Key Slot Harness Connector And Ground
      G05876357Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: Replace key slot. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 6

  6. CHECK KEY SLOT COMMUNICATION SIGNAL CIRCUIT
    1. Disconnect BCM harness connector.
    2. Check continuity between key slot harness connector M40 (A) terminal 3 and BCM harness connector M19 (B) terminal 69.
      CONTINUITY REFERENCE CHART

      Key slot BCM Continuity
      Connector Terminal Connector Terminal
      A: M40 3 B: M19 69 Yes
    3. Check continuity between key slot harness connector M40 (A) terminal 3 and ground.
      Fig 4: Checking Continuity Between Key Slot Harness Connector M40 Terminal 3 And Ground
      G05876358Courtesy of NISSAN MOTOR CO., U.S.A.
      CONTINUITY REFERENCE CHART

      Key slot Ground Continuity
      Connector Terminal
      A: M40 3 Ground No

      Is the inspection result normal? 

      YES: GO TO  8

      NO: Repair harness or connector.

  7. CHECK KEY SLOT GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect key slot harness connector.
    3. Check continuity between key slot harness connector and ground.
      CONTINUITY REFERENCE CHART

      Key slot Ground Continuity
      Connector Terminal
      M40 7 Ground Yes
      Fig 5: Checking Continuity Between Key Slot Harness Connector And Ground
      G05876359Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO 8

      NO: Repair harness or connector.

  8. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    Inspection End.

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