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Home >> Infiniti >> 2017 >> QX80 Limited >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Interior Lighting System >> DTC/Circuit Diagnosis >> Side Step Illumination Lamp Circuit >> LH >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK SIDE STEP ILLUMINATION CONTROL UNIT OUTPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect side step illumination lamp connector.
    3. Check voltage between side step illumination lamp harness connector and ground.
    (+) (-) Condition Voltage
    (Approx.)
    Side step illumination lamp
    Connector Terminal
    LH 1 E241 1 Ground Any door Open 12 V
    Close 12 V
    LH 2 E242 1 Any door Open 12 V
    Close 12 V
    LH 3 E243 1 Any door Open 12 V
    Close 12 V
    LH 4 E244 1 Any door Open 12 V
    Close 12 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK SIDE STEP ILLUMINATION CONTROL UNIT OUTPUT SIGNAL CIRCUIT

    1. Disconnect side step illumination control unit connector.
    2. Check continuity between side step illumination control unit harness connector and side step illumination lamp harness connector.
      Side step illumination control unit Side step illumination lamp Continuity
      Connector Terminal Connector Terminal
      E250 12 LH 1 E241 1 Existed
      LH 2 E242
      LH 3 E243
      LH 4 E244
    3. Check continuity between side step illumination control unit harness connector and ground.
      Side step illumination control unit Ground Continuity
      Connector Terminal
      E250 12 Not existed

    Is the inspection result normal?

    YES 

    Replace side step illumination control unit.

    NO 

    Repair or replace harnesses.

  3. CHECK SIDE STEP ILLUMINATION CONTROL UNIT OUTPUT SIGNAL-2

    1. Connect side step illumination lamp connector.
    2. Check voltage between side step illumination lamp harness connector and ground.
    (+) (-) Condition Voltage
    (Approx.)
    Side step illumination lamp
    Connector Terminal
    LH 1 E241 2 Ground Any door Open 0 V
    Close 12 V
    LH 2 E242 2 Any door Open 0 V
    Close 12 V
    LH 3 E243 2 Any door Open 0 V
    Close 12 V
    LH 4 E244 2 Any door Open 0 V
    Close 12 V

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Replace malfunction side step illumination lamp.

  4. CHECK SIDE STEP ILLUMINATION LAMP OUTPUT CIRCUIT

    1. Disconnect side step illumination control unit connector.
    2. Check continuity between side step illumination control unit harness connector and side step illumination lamp harness connector.
      Side step illumination control unit Side step illumination lamp Continuity
      Connector Terminal Connector Terminal
      E250 14 LH 1 E241 2 Existed
      LH 2 E242
      LH 3 E243
      LH 4 E244
    3. Check continuity between side step illumination control unit harness connector and ground.
      Side step illumination control unit Ground Continuity
      Connector Terminal
      E250 14 Not existed

    Is the inspection result normal?

    YES 

    Replace side step illumination control unit.

    NO 

    Repair or replace harnesses.

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