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Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK TURN SIGNAL LAMP BULB

    Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open.

    Is the bulb OK? 

    YES: GO TO 2

    NO: Replace the bulb.

  2. CHECK TURN SIGNAL LAMP OUTPUT VOLTAGE
    1. Turn the ignition switch OFF.
    2. Disconnect front combination lamp connector and rear combination lamp connector.
    3. Turn the ignition switch ON.
    4. With turn signal switch operating, check the voltage between the front combination lamp harness connector and ground.
      (+) (-) Voltage
      Connector Terminal
      E27 LH 3 Ground
      G08168712
      E111 RH
    5. With turn signal switch operating, check the voltage between the rear combination lamp harness connector and ground.
      (+) (-) Voltage
      Connector Terminal
      B35 LH 4 Ground
      G08168713
      B105 RH

      Is voltage reading as specified? 

      YES: GO TO 3

      NO: GO TO  5

  3. CHECK TURN SIGNAL LAMP CIRCUIT FOR OPEN
    1. Turn the ignition switch OFF.
    2. Disconnect BCM connector M20, front combination lamp connector and rear combination lamp connector.
    3. Check continuity between the BCM harness connector M20 (A) and the front combination lamps harness connector (B).
      A B Continuity
      Connector Terminal Connector Terminal
      Front LH M20 60 E27 3 Yes
      Front RH 61 E111
      Fig 1: Checking Continuity Between BCM Connector M20 Terminal 60, 61 And Front Combination Lamps Connector Terminal 3
      G08168714Courtesy of NISSAN NORTH AMERICA, INC.
    4. Check continuity between the BCM harness connector M20 (A) and the rear combination lamp harness connector (B).
      A B Continuity
      Connector Terminal Connector Terminal
      Rear LH M20 60 B35 4 Yes
      Rear RH 61 B105 4
      Fig 2: Checking Continuity Between BCM Connector M20 Terminal 60, 61 And Rear Combination Lamp Connector Terminal 4
      G08168715Courtesy of NISSAN NORTH AMERICA, INC.

      Are continuity results as specified? 

      YES: GO TO 4

      NO: Repair the harnesses or connectors.

  4. CHECK TURN SIGNAL LAMP SHORT CIRCUIT

    Check continuity between the BCM harness connector M20 and ground.

    Connector Terminal - Continuity
    LH M20 60 Ground No
    RH 61

    Does continuity exist? 

    YES: Repair the harnesses or connectors.

    NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

  5. CHECK TURN SIGNAL LAMP GROUND CIRCUIT
    Fig 3: Checking Continuity Between BCM Connector M20 Terminals And Ground
    G08168716Courtesy of NISSAN NORTH AMERICA, INC.
    1. Check continuity between the front combination lamp harness connector and ground.
      Connector Terminal - Continuity
      Front LH E27 1 Ground Yes
      Front RH E111
      Fig 4: Checking Continuity Between Front Combination Lamp Connector Terminal 1 And Ground
      G08168717Courtesy of NISSAN NORTH AMERICA, INC.
    2. Check continuity between the rear combination lamp harness connector and ground.
      Connector Terminal - Continuity
      Rear LH B35 5 Ground Yes
      Rear RH B105

      Are continuity results as specified? 

      YES: Replace the malfunctioning lamp.

      NO: Repair the harnesses or connectors.

      Fig 5: Checking Continuity Between Rear Combination Lamp Connector Terminal 5 And Ground
      G08168718Courtesy of NISSAN NORTH AMERICA, INC.
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