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Home >> Infiniti >> 2017 >> QX30 Base >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System (Led Headlamp) (DTCS) (2 Of 2) >> DTC/Circuit Diagnosis >> DTC C1526: Rear Height Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK REAR HEIGHT SENSOR INSTALLATION CONDITION

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

    Is it properly installed?

    YES 

    GO TO STEP 2. 

    NO 

    Install rear height sensor properly.

  2. CHECK REAR HEIGHT SENSOR POWER SUPPLY

    1. Turn ignition switch ON.
    2. Check voltage between rear height sensor harness connector and ground.
      (+) (-) Voltage
      Rear height sensor
      Connector Terminal
      M156 5 Ground 4.75 - 5.25 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 5  .

  3. CHECK REAR HEIGHT SENSOR GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and rear height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and ground.
      Rear height sensor Ground Continuity
      Connector Terminal
      M156 1 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 4. 

    NO 

    Repair or replace harness.

  4. CHECK REAR HEIGHT SENSOR SIGNAL

    1. Connect front combination lamp LH and rear 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 9 Ground 0.5 - 4.5 V

    Is the inspection result normal?

    YES 

    GO TO STEP   9  .

    NO 

    GO TO STEP   7 . 

  5. CHECK REAR HEIGHT SENSOR POWER SUPPLY CIRCUIT 1

    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and rear height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and rear height sensor harness connector.
      Front combination lamp LH Rear height sensor Continuity
      Connector Terminal Connector Terminal
      E114 7 M156 5 Existed
    4. Check continuity between rear height sensor harness connector and ground.
      Rear height sensor Ground Continuity
      Connector Terminal
      M156 5 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6. 

    NO 

    Repair or replace harness.

  6. CHECK REAR HEIGHT SENSOR POWER SUPPLY CIRCUIT 2

    Check voltage between rear height sensor harness connector and ground.

    (+) (-) Voltage
    Rear height sensor
    Connector Terminal
    M156 5 Ground 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 9. 

    NO 

    Repair or replace harness.

  7. CHECK REAR HEIGHT SENSOR SIGNAL CIRCUIT 1

    1. Turn ignition switch OFF.
    2. Disconnect front combination lamp LH and rear height sensor connector.
    3. Check continuity between front combination lamp LH harness connector and rear height sensor harness connector.
      Front combination lamp LH Rear height sensor Continuity
      Connector Terminal Connector Terminal
      E114 9 M156 4 Existed
    4. Check continuity between rear height sensor harness connector and ground.
      Rear height sensor Ground Continuity
      Connector Terminal
      M156 4 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 8. 

    NO 

    Repair or replace harness.

  8. CHECK REAR HEIGHT SENSOR SIGNAL CIRCUIT 2

    Check voltage between rear height sensor harness connector and ground.

    (+) (-) Voltage
    Rear height sensor
    Connector Terminal
    M156 5 Ground 0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 9. 

    NO 

    Repair or replace harness.

  9. ERASE DTC

    1. Connect front combination lamp LH and rear 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 STEP 10  .

    NO 

    INSPECTION END

  10. REPLACE REAR HEIGHT SENSOR AND ERASE DTC

    1. Turn ignition switch OFF.
    2. Replace rear 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