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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Tire Pressure Warning System (W/ Front Lidar Sensor) - Diagnostics - Introduction) >> TIRE PRESSURE WARNING SYSTEM (w/ Front LiDAR Sensor) >> How To Proceed With Troubleshooting [10/2023 - ] >> Procedure

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

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  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. CUSTOMER PROBLEM ANALYSIS 
    1. Interview the customer to confirm the problem.

      HINT: 

      It is important to collect as much specific information as possible from the customer to allow for a quick repair.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. ADJUST TIRE PRESSURE* 
    1. Turn the power switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the power switch on (IG).
    4. Enter the following menus: Chassis / Tire Pressure Monitor / Data List.
    5. Set the pressure of each tire to the specified value.
      NOTE:

      Refer to the link as the procedure for adjusting the tire pressures differs depending on the temperature of the tires.

      Refer to INSPECTION [10/2023 - ]

    6. Display "ID Tire Inflation Pressure" in the Data List and check that the tire pressure values match the adjusted pressure amount.

      HINT: 

      It may take a few minutes until the values are displayed.

    7. Perform initialization.

      Refer to INITIALIZATION [10/2023 - ] 

      HINT: 

      The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following condition is met:

      • Due to the operation of the steering pad switch assembly, the tire pressure drops to approximately 75% or less of the tire pressure set during system initialization.

      Result

      Result Proceed to
      Tire pressure warning light remains on A
      Tire pressure warning light goes off B

    Result: 

    See step  11

    Result: 

    See step  4

  4. CHECK ECU CONNECTED TO CAN BUS* 
    1. Check the ECUs connected to the CAN bus.

      Refer to DIAGNOSIS SYSTEM [10/2023 - ]

      Result

      Result Proceed to
      No malfunction appears A
      Malfunction appears B

    Result: 

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

    Result: 

    See step  5

  5. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)* 
    1. Check for DTCs.

      Refer to DIAGNOSIS SYSTEM [10/2023 - ]

      Result

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

    Result: 

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

    Result: 

    See step  6

  6. CHECK FOR DTC* 
    1. Check for DTCs.

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

      Result

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

    Result: 

    See step  8

    Result: 

    See step  7

  7. DTC CHART 
    1. Refer to Diagnostic Trouble Code Chart.

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

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

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

      Refer to PROBLEM SYMPTOMS TABLE [10/2023 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. CIRCUIT INSPECTION* 
    1. Refer to Electronic Circuit Inspection Procedure.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2017 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  10

  10. REPAIR OR REPLACE 
    1. Repair or replace parts based on the diagnosis result.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  11

  11. CONFIRMATION TEST* 
    1. Check the Data List to confirm that the tire inflation pressure has been received.

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

    2. Perform initialization.

      Refer to INITIALIZATION [10/2023 - ] 

    3. Confirm that the initialization has been completed.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END