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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (Lighting System (Ext) (Hybrid) - Symptom Tests (2 Of 2) & Circuit Tests) >> LIGHTING SYSTEM (for HV Model) >> Parking Light/Daytime Running Light Circuit [08/2021 - ] >> Procedure

Parking Light/Daytime Running Light Circuit [08/2021 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONFIRM MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      for LED Type Turn Signal Light A
      for Bulb Type Turn Signal Light B

    Result: 

    B 

    See step  9

    Result: 

    A 

    See step  2

  2. CHECK LIGHTS 
    1. Check the illumination of each parking lights and daytime running lights.

      Result

      Result Proceed to
      LH side parking light and daytime running light does not illuminate A
      RH side parking light and daytime running light does not illuminate B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  3

  3. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / AFS / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > AFS > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Clearance Light Left parking light OFF or ON -
      Daytime Running Light Left daytime running light OFF or ON -

      Body Electrical > AFS > Active Test 

      Tester Display
      Clearance Light

      Body Electrical > AFS > Active Test 

      Tester Display
      Daytime Running Light

      OK

      Parking lights and daytime running lights illuminate.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ] 

    Result: 

    NG 

    See step  4

  4. CHECK HEADLIGHT UNIT ASSEMBLY LH 
    1. Interchange the headlight unit assembly LH with RH and connect the connectors.

      Refer to DISASSEMBLY [08/2021 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS) 
    1. Check the operation of the parking lights and daytime running lights of the headlight unit assembly LH.

      OK

      The parking lights and daytime running lights operate normally of the headlight unit assembly LH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY LH. Refer to  DISASSEMBLY [08/2021 - ] 

  6. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / AFS (Sub) / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > AFS (Sub) > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Clearance Light Right parking light OFF or ON -
      Daytime Running Light Right daytime running light OFF or ON -

      Body Electrical > AFS (Sub) > Active Test 

      Tester Display
      Clearance Light

      Body Electrical > AFS (Sub) > Active Test 

      Tester Display
      Daytime Running Light

      OK

      Parking lights and daytime running lights illuminate.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ] 

    Result: 

    NG 

    See step  7

  7. CHECK HEADLIGHT UNIT ASSEMBLY RH 
    1. Interchange the headlight unit assembly RH with LH and connect the connectors.

      Refer to DISASSEMBLY [08/2021 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS) 
    1. Check the operation of the parking lights and daytime running lights of the headlight unit assembly RH.

      OK

      The parking lights and daytime running lights operate normally of the headlight unit assembly RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE HEADLIGHT UNIT ASSEMBLY RH. Refer to  DISASSEMBLY [08/2021 - ] 

  9. CHECK LIGHTS 
    1. Check the illumination of each parking lights and daytime running lights.

      Result

      Result Proceed to
      LH side parking light and daytime running light does not illuminate A
      RH side parking light and daytime running light does not illuminate B

    Result: 

    B 

    See step  13

    Result: 

    A 

    See step  10

  10. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / HL AutoLeveling / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > HL AutoLeveling > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Clearance Light Left parking light OFF or ON -
      Daytime Running Light Left daytime running light OFF or ON -

      Body Electrical > HL AutoLeveling > Active Test 

      Tester Display
      Clearance Light

      Body Electrical > HL AutoLeveling > Active Test 

      Tester Display
      Daytime Running Light

      OK

      Parking lights and daytime running lights illuminate.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ] 

    Result: 

    NG 

    See step  11

  11. CHECK HEADLIGHT ASSEMBLY LH 
    1. Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.

      Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS) 
    1. Check the operation of the parking lights and daytime running lights of the headlight assembly LH.

      OK

      The parking lights and daytime running lights operate normally of the headlight assembly LH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [06/2018 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE HEADLIGHT ASSEMBLY LH. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

  13. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Active Test.
    5. Perform the Active Test according to the display on the Techstream.

      Body Electrical > HL AutoLeveling (Sub) > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Clearance Light Right parking light OFF or ON -
      Daytime Running Light Right daytime running light OFF or ON -

      Body Electrical > HL AutoLeveling (Sub) > Active Test 

      Tester Display
      Clearance Light

      Body Electrical > HL AutoLeveling (Sub) > Active Test 

      Tester Display
      Daytime Running Light

      OK

      Parking lights and daytime running lights illuminate.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ] 

    Result: 

    NG 

    See step  14

  14. CHECK HEADLIGHT ASSEMBLY RH 
    1. Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.

      Refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  15

  15. CHECK OPERATION (PARKING LIGHTS AND DAYTIME RUNNING LIGHTS) 
    1. Check the operation of the parking lights and daytime running lights of the headlight assembly RH.

      OK

      The parking lights and daytime running lights operate normally of the headlight assembly RH.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [06/2018 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    REPLACE HEADLIGHT ASSEMBLY RH. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

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