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How To Proceed With Troubleshooting [12/2017 - 10/2023]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 Lexus LS 500, 2022 Lexus LS 500, 2021 Lexus LS 500, 2020 Lexus LS 500, and 2019 Lexus LS 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. CUSTOMER PROBLEM ANALYSIS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. CONNECT TECHSTREAM TO THE DLC3* 

    HINT: 

    If the display on the tester indicates a communication error, inspect the DLC3.

    When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK DTC AND FREEZE FRAME DATA* 
    1. Check for DTCs.

      Body Electrical > Sub Battery Module > Trouble Codes 

    2. Check for freeze frame data.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CLEAR DTC AND FREEZE FRAME DATA* 
    1. Clear the DTCs and freeze frame data.

      Body Electrical > Sub Battery Module > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS 

    Result

    Proceed to
    Problem symptom does not occur
    Problem symptom occurs

    Result: 

    Problem symptom occurs 

    See step  8

    Result: 

    Problem symptom does not occur 

    See step  7

  7. CHECK FOR INTERMITTENT PROBLEMS 

    Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2017 - 10/2023] 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK FOR DTCS* 

    Refer to DTC CHECK / CLEAR [12/2017 - 10/2023] 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  9

  9. REFER TO DTC CHART 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2017 - 10/2023] 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CONDUCT CIRCUIT INSPECTION 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  11

  11. IDENTIFY PROBLEM 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  12. ADJUST AND/OR REPAIR 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  13

  13. CONDUCT CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END