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How To Proceed With Troubleshooting [09/2022 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 300h, 2024 Lexus ES 250, 2023 Lexus ES 350, and 2023 Lexus ES 300h. 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. INSPECT AUXILIARY BATTERY VOLTAGE 
    1. Measure the auxiliary battery voltage with the ignition switch off.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK CAN COMMUNICATION SYSTEM* 
    1. Use the GTS to check if the CAN communication system is functioning normally.

      for Gasoline Model: Refer to DIAGNOSIS SYSTEM [09/2022 - ]

      for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

      Result

      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM 

    for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

    for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

    Result: 

    See step  5

  5. SYSTEM CHECK 
    1. Check the vehicle specifications.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. CHECK BLIND SPOT MONITOR SYSTEM 
    1. Use the GTS to check if the blind spot monitor system is functioning normally.

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO BLIND SPOT MONITOR SYSTEM 

    for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

    for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

    Result: 

    See step  7

  7. CHECK MODEL 
    1. Choose the model to be inspected.

      Result

      Result Proceed to
      w/ Panoramic View Monitor System A
      w/ Parking Assist Monitor System B

    Result: 

    See step  20

    Result: 

    See step  8

  8. CHECK PANORAMIC VIEW MONITOR SYSTEM 
    1. Use the GTS to check if the panoramic view monitor system is functioning normally.

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    GO TO PANORAMIC VIEW MONITOR SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] 

    Result: 

    See step  9

  9. PROBLEM SYMPTOM CONFIRMATION 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CHECK DTC 
    1. Check for DTCs and note any codes that are output.

      Body Electrical > Clearance Warning > Trouble Codes 

    2. Clear the DTCs.

      Body Electrical > Clearance Warning > Clear DTCs 

    3. Check for DTCs.

      Body Electrical > Clearance Warning > Trouble Codes 

      Result

      Result Proceed to
      DTCs are output A
      DTCs are not output B

    Result: 

    See step  12

    Result: 

    See step  11

  11. DIAGNOSTIC TROUBLE CODE CHART (PARKING SUPPORT ALERT SYSTEM) 
    1. Refer to Diagnostic Trouble Code Chart.

      Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ] 

      NOTE:

      The clearance warning ECU assembly outputs DTCs for the following system. When DTCs other than those in Diagnostic Trouble Code Chart for the parking support alert system are output, refer to Diagnostic Trouble Code Chart for the relevant system.

      System Proceed to
      Parking Support Brake System Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2022 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  16

  12. CHECK FOR VEHICLE CONTROL HISTORY* 

    HINT: 

    Refer to Vehicle Control History.

    Refer to VEHICLE CONTROL HISTORY (RoB) [09/2022 - ]

    1. Check for vehicle control history and note any codes that are output.

      Body Electrical > Clearance Warning > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Result

      Result Proceed to
      No vehicle control history is output (Problem symptom does not occur) A
      No vehicle control history is output (Problem symptom occurs) B
      X20C0 or X20C1 is output C
      Any vehicle control history other than X20C0 and X20C1 is output D

    Result: 

    See step  14

    Result: 

    GO TO CALIBRATION. Refer to  CALIBRATION [09/2022 - ] 

    Result: 

    GO TO VEHICLE CONTROL HISTORY. Refer to  VEHICLE CONTROL HISTORY (RoB) [09/2022 - ] 

    Result: 

    See step  13

  13. SYMPTOM SIMULATION 
    1. Refer to Symptom Simulation.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  14

  14. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table.

      Refer to PROBLEM SYMPTOMS TABLE [09/2022 - ] 

      Result

      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

    Result: 

    See step  16

    Result: 

    See step  15

  15. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Terminals of ECU

      Refer to TERMINALS OF ECU [09/2022 - ] 

    2. Data List / Active Test

      Refer to DATA LIST / ACTIVE TEST [09/2022 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  16

  16. CIRCUIT INSPECTION 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  17

  17. IDENTIFICATION OF PROBLEM 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  18

  18. REPAIR OR REPLACE 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  19

  19. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END 

  20. CHECK PARKING ASSIST MONITOR SYSTEM 
    1. Use the GTS to check if the parking assist monitor system is functioning normally.

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    See step  9

    Result: 

    GO TO PARKING ASSIST MONITOR SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ]