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Home >> Infiniti >> 2018 >> QX30 Essential, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System - Led Headlamp (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> C151E: Front Height Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FRONT HEIGHT SENSOR INSTALLATION CONDITION 

    Check mounting part of front height sensor and its link for looseness and deformation.

    Is it properly installed?

    YES

    GO TO 2.

    NO

    Install front height sensor properly.

  2. CHECK FRONT HEIGHT SENSOR POWER SUPPLY 
    1. Turn ignition switch ON.
    2. Check voltage between front height sensor harness connector and ground.

      (+)

      (-)

      Voltage

      Front height sensor

      Connector

      Terminal

      E91

      5

      Ground

      4.75 - 5.25 V

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 5.

  3. CHECK FRONT HEIGHT SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and front height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and ground.

      Front height sensor

      Ground

      Continuity

      Connector

      Terminal

      E91

      1

      Not existed

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace harness.

  4. CHECK FRONT HEIGHT SENSOR SIGNAL 
    1. Connect front combination lamp LH and front height sensor connector.
    2. Turn ignition switch ON.
    3. Check voltage between front combination lamp LH harness connector and ground.

      (+)

      (-)

      Voltage

      Front combination lamp LH

      Connector

      Terminal

      E114

      6

      Ground

      0.5 - 4.5 V

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    GO TO 7.

  5. CHECK FRONT HEIGHT SENSOR POWER SUPPLY CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and front height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and front height sensor harness connector.

      Front combination lamp LH

      Front height sensor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E114

      7

      E91

      5

      Existed

    4. Check continuity between front height sensor harness connector and ground.

      Front height sensor

      Ground

      Continuity

      Connector

      Terminal

      E91

      5

      Not existed

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace harness.

  6. CHECK FRONT HEIGHT SENSOR POWER SUPPLY CIRCUIT 2 

    Check voltage between front height sensor harness connector and ground.

    (+)

    (-)

    Voltage

    Front height sensor

    Connector

    Terminal

    E91

    5

    Ground

    0 V

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Repair or replace harness.

  7. CHECK FRONT HEIGHT SENSOR SIGNAL CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and front height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and front height sensor harness connector.

      Front combination lamp LH

      Front height sensor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E114

      6

      E91

      4

      Existed

    4. Check continuity between front height sensor harness connector and ground.

      Front height sensor

      Ground

      Continuity

      Connector

      Terminal

      E91

      4

      Not existed

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Repair or replace harness.

  8. CHECK FRONT HEIGHT SENSOR SIGNAL CIRCUIT 2 

    Check voltage between front height sensor harness connector and ground.

    (+)

    (-)

    Voltage

    Front height sensor

    Connector

    Terminal

    E91

    5

    Ground

    0 V

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Repair or replace harness.

  9. ERASE DTC 
    1. Connect front combination lamp LH and front height sensor connector.
    2. Turn ignition switch ON.
    3. Select "Self Diagnostic Result" mode of "H/L control module LH" using CONSULT.
    4. Erase DTC, and then repeat "DTC CONFIRMATION PROCEDURE". Refer to DTC Description .

    Is DTC detected?

    YES

    GO TO 10.

    NO

    INSPECTION END

  10. REPLACE FRONT HEIGHT SENSOR AND ERASE DTC 
    1. Turn ignition switch OFF.
    2. Replace front height sensor. Refer to Removal and Installation .
    3. Turn ignition switch ON.
    4. Select "Self Diagnostic Result" mode of "H/L control module LH" using CONSULT.
    5. Erase DTC, and then repeat "DTC CONFIRMATION PROCEDURE". Refer to DTC Description .

    Is DTC detected?

    YES

    Replace front combination lamp LH. Refer to Removal and Installation .

    NO

    INSPECTION END