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Home >> Infiniti >> 2011 >> FX35 RWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System -- FX35/FX50 >> DTC/Circuit Diagnosis >> DTC B2503, B2504: Swivel Actuator >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK SWIVEL POSITION SENSOR SIGNAL INPUT
    1. Turn the ignition switch ON.
    2. Check the voltage between the AFS control unit harness connector and the ground.
      VOLTAGE REFERENCE CHART

      Terminals Voltage (Approx.)
      (+) (-)
      AFS control unit Ground
      Connector Terminal
      RH M16 9 0.25 - 4.75 V
      LH 29

      Is the measurement value within the standard value? 

      YES: GO TO 2.

      Less than the standard value: GO TO  6.

      Higher than the standard value: GO TO  9.

  2. CHECK SWIVEL MOTOR

    Check the swivel motor. "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: Replace the front combination lamp.

  3. CHECK SWIVEL MOTOR OPEN CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect AFS control unit connector and the headlamp swivel actuator connector.
    3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.
      CONTINUITY REFERENCE CHART

      AFS control unit Headlamp swivel actuator Continuity
      Connector Terminal Connector Terminal
      RH M16 11 E29 8 Existed
      13 7
      32 3
      34 4
      LH 15 E59 3
      17 4
      36 8
      38 7

      Does continuity exist? 

      YES: GO TO 4.

      NO: Repair the harnesses or connectors.

  4. CHECK SWIVEL MOTOR SHORT CIRCUIT

    Check continuity between the AFS control unit harness connector and the ground.

    CONTINUITY REFERENCE CHART

    AFS control unit Ground Continuity
    Connector Terminal
    RH M16 11 Not existed
    13
    32
    34
    LH 15
    17
    36
    38

    Does continuity exist? 

    YES: Repair the harnesses or connectors.

    NO: GO TO 5.

  5. CHECK SWIVEL MOTOR CIRCUIT VOLTAGE OUTPUT
    1. Connect AFS control unit connector.
    2. Turn the ignition switch ON.
    3. Turn the headlamp ON.
    4. Select "LOW BEAM TEST RIGHT" or "LOW BEAM TEST LEFT" of ADAPTIVE LIGHT active test item.
    5. With operating the test item, check the voltage between the AFS control unit harness connector and the ground.
      VOLTAGE REFERENCE CHART

      Terminals Condition Voltage (Approx.)
      (+) (-)
      AFS control unit Ground Swivel motor
      Connector Terminal
      RH M16 11 Active
      G05730038

      8 - 12 V
      32
      LH 15
      36
      RH 13 Stop 9.5 - 11.5 V
      34
      LH 17
      38

      Is the measurement value within the standard value? 

      YES: Replace the front combination lamp.

      NO: Replace AFS control unit.

  6. CHECK SWIVEL POSITION SENSOR SIGNAL OUTPUT

    Check the voltage between the AFS control unit harness connector and the ground.

    VOLTAGE REFERENCE CHART

    Terminals Voltage (Approx.)
    (+) (-)
    AFS control unit Ground
    Connector Terminal
    RH M16 4 5 V
    LH 24

    Is the measurement value normal? 

    YES: GO TO 7.

    NO: GO TO  9.

  7. CHECK SWIVEL POSITION SENSOR POWER SUPPLY CIRCUIT INPUT VOLTAGE
    1. Turn the ignition switch OFF.
    2. Disconnect the headlamp swivel actuator connector.
    3. Turn the ignition switch ON.
    4. Check the voltage between the headlamp swivel actuator harness connector and the ground.
      VOLTAGE REFERENCE CHART

      Terminals Voltage (Approx.)
      (+) (-)
      Headlamp swivel actuator Ground
      Connector Terminal
      RH E29 2 5 V
      LH E59 2

      Is the measurement value normal? 

      YES: GO TO 8.

      NO: Repair the harnesses or connectors.

  8. CHECK SWIVEL POSITION SENSOR SIGNAL SHORT CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect AFS control unit connector.
    3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.
      CONTINUITY REFERENCE CHART

      AFS control unit Headlamp swivel actuator Continuity
      Connector Terminal Connector Terminal
      RH M16 9 E29 1 Existed
      LH 29 E59 1

      Does continuity exist? 

      YES: Replace the front combination lamp.

      NO: Repair the harnesses or connectors.

  9. CHECK SWIVEL POSITION SENSOR GROUND CIRCUIT VOLTAGE OUTPUT

    Check the voltage between the AFS control unit harness connector and the ground.

    VOLTAGE REFERENCE CHART

    Terminals Voltage (Approx.)
    (+) (-)
    AFS control unit Ground
    Connector Terminal
    RH M16 2 0 V
    LH 27

    Is the measurement value normal? 

    YES: GO TO 10.

    NO: Replace AFS control unit.

  10. CHECK SWIVEL POSITION SENSOR SHORT GROUND CIRCUIT
    1. Turn the ignition switch OFF.
    2. Disconnect AFS control unit connector and the headlamp swivel actuator connector.
    3. Check continuity between the AFS control unit harness connector and the headlamp swivel actuator harness connector.
      CONTINUITY REFERENCE CHART

      AFS control unit Headlamp swivel actuator Continuity
      Connector Terminal Connector Terminal
      RH M16 2 E29 6 Existed
      LH 27 E59 6

      Does continuity exist? 

      YES: Replace the front combination lamp.

      NO: Repair the harnesses or connectors.

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