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

WARNING: This page is about a different car, the 2024 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 

    HINT: 

    If there are any scratches or impact marks on the rear bumper, perform the front side radar beam axis confirmation. If any abnormalities are found, perform the front side radar sensor installation condition inspection.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  3

  3. PRE-CHECK 
    1. Measure the battery voltage with the ignition switch off.

      Standard voltage

      11 to 14 V

      HINT: 

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

    2. Check the fuses and relays.
    3. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Using the GTS, check for CAN communication system DTCs.

      Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ]

      Result

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

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    See step  5

  5. CHECK FOR DTC AND FREEZE FRAME DATA* 
    1. Using the GTS, check for DTCs.

      Body Electrical > Front Side Radar "A" > Trouble Codes 

      Body Electrical > Front Side Radar "B" > Trouble Codes 

      1. Check for DTCs and save.
      2. Check for freeze frame data and save.
      3. Based on the saved DTCs and freeze frame data, simulate the malfunction conditions and check if the DTCs are output again.

      Result

      Result Proceed to
      DTCs are not output (symptoms can be confirmed or reproduced) A
      DTCs are not output (symptoms cannot be confirmed or reproduced) B
      DTCs are output C

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2023 - ] 

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2023 - ]  

    Result: 

    See step  6

  6. CHECK VEHICLE CONTROL HISTORY* 
    1. Using the GTS, check for Vehicle Control History (RoB).

      Body Electrical > Front Side Radar "A" > Utility 

      Tester Display
      Vehicle Control History (RoB)

      Body Electrical > Front Side Radar "B" > Utility 

      Tester Display
      Vehicle Control History (RoB)
    2. Make a note of the output Vehicle Control History (RoB).

      Result

      Result Proceed to
      Vehicle Control History (RoB) codes are not output A
      Vehicle Control History (RoB) code is output B

    Result: 

    GO TO VEHICLE CONTROL HISTORY (RoB). Refer to  VEHICLE CONTROL HISTORY (RoB) [10/2023 - ] 

    Result: 

    See step  7

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

      Refer to PROBLEM SYMPTOMS TABLE [10/2023 - ] 

      Result

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

    Result: 

    GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2023 - ]  

    Result: 

    See step  8

  8. PERFORM TROUBLESHOOTING BASED ON MALFUNCTION SYMPTOM* 
    1. Refer to Terminals of ECU.

      Refer to TERMINALS OF ECU [10/2023 - ] 

    2. Refer to Data List / Active Test.

      Refer to DATA LIST / ACTIVE TEST [10/2023 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. ADJUST, REPAIR OR REPLACE 

    Result

    Result Proceed to
    When adjusting or repairing A
    When replacing B

    Result: 

    See step  11

    Result: 

    See step  10

  10. CLEAR DTC 
    1. Clear the DTCs.

      Body Electrical > Front Side Radar "A" > Clear DTCs 

      Body Electrical > Front Side Radar "B" > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  11. PERFORM BEAM AXIS CONFIRMATION 
    1. Confirm the front side radar sensor beam axis display and perform the front side radar sensor beam axis adjustment.

      Triangle Target: Refer to TARGET ADJUSTMENT (TRIANGLE TARGET) [10/2023 - ]

      Driving Adjustment: Refer to DRIVING ADJUSTMENT [10/2023 - ]

      ECU DATA SAVE/WRITE: Refer to ECU DATA SAVE/WRITE [10/2023 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. PERFORM CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END