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Home >> Lexus >> 2021 >> LC 500 2D Coupe >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Ext) - Symptom Tests & Circuit Tests (2 Of 2) (Coupe) >> Lighting System >> Exterior Illumination Circuit [03/2017 - ] >> Procedure

Exterior Illumination Circuit [03/2017 - ]: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Perform the Active Test according to the display on the Techstream.

      Refer to DATA LIST / ACTIVE TEST [03/2017 - 04/2020] , or refer to DATA LIST / ACTIVE TEST [04/2020 - 05/2023] , or refer to DATA LIST / ACTIVE TEST [05/2023 - ]

      Body Electrical > Main Body > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Exterior Light Outside handle lights OFF or ON -

      Body Electrical > Main Body > Active Test 

      Tester Display
      Exterior Light

      OK

      Outside handle lights illuminate.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [03/2017 - 05/2023]  , or refer to  PROBLEM SYMPTOMS TABLE [05/2023 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT DOOR OUTSIDE HANDLE SUB-ASSEMBLY LH 
    1. Remove the door outside handle sub-assembly LH.

      Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

    2. Inspect the door outside handle sub-assembly LH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DOOR OUTSIDE HANDLE SUB-ASSEMBLY LH. Refer to  REMOVAL [03/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

    Result: 

    OK 

    See step  3

  3. INSPECT DOOR OUTSIDE HANDLE SUB-ASSEMBLY RH 
    1. Remove the door outside handle sub-assembly RH.

      Refer to REMOVAL [03/2017 - 05/2023] , or refer to REMOVAL [05/2023 - ]

    2. Inspect the door outside handle sub-assembly RH.

      Refer to INSPECTION [03/2017 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE DOOR OUTSIDE HANDLE SUB-ASSEMBLY RH. Refer to  REMOVAL [03/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - DOOR OUTSIDE HANDLE SUB-ASSEMBLY LH) 
    1. Disconnect the P9 main body ECU (multiplex network body ECU) connector.
    2. Disconnect the W3 door outside handle sub-assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      P9-2 (MILE) - W3-2 (OLP) Always Below 1 Ω
      P9-2 (MILE) or W3-2 (OLP) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (DOOR OUTSIDE HANDLE SUB-ASSEMBLY RH - DOOR OUTSIDE HANDLE SUB-ASSEMBLY LH AND BODY GROUND) 
    1. Disconnect the V3 door outside handle sub-assembly RH connector.
    2. Disconnect the W3 door outside handle sub-assembly LH connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      V3-2 (OLP) - W3-1 (GND) Always Below 1 Ω
      V3-1 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [03/2017 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR