TIRE PRESSURE WARNING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


  • Use the following procedure to troubleshoot the tire pressure warning system.

  • Make sure that the wireless door lock control system has exited diagnostic mode before performing the following procedure.

  • *: Use the GTS.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. CUSTOMER PROBLEM ANALYSIS


    1. Interview the customer to confirm the problem.

      Tech Tips

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

      Result
      Proceed to
      NEXT

    NEXT

  3. ADJUST TIRE PRESSURE*


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the engine 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.

      Click here

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

      Tech Tips

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

    7. Perform initialization.

      Click here

      Tech Tips

      for FMVSS138 Type:


      • 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.

          Tech Tips

          The tire pressure warning pressure (pressure at which the tire pressure warning light is illuminated) cannot be set to approximately 75% or less of a specified tire pressure value.

      for ECE-R64 Type:


      • The warning threshold value changes depending on the driving conditions during initialization. As a result, the tire pressure warning light may not turn off even if the tire pressure is adjusted to the specified pressure.

      • The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following conditions are met:


        • Due to the operation of the steering pad switch assembly, the tire pressure drops to approximately 80% or less of the tire pressure set during system initialization.

        • The tire pressure drastically decreases (approximately 20 kPa (0.2 kgf/cm2, 2.9 psi) or more within several minutes) to approximately 80% or less of the tire pressure* when the tires are warmed.

          *: If initialization is performed and the vehicle is driven for a certain period of time, the tire pressure set during system initialization is adjusted and set to the tire pressure when the tires are warmed from the driving conditions.

          Tech Tips

          The tire pressure warning pressure (pressure at which the tire pressure warning light is illuminated) cannot be set to approximately 80% or less of a specified tire pressure value.

          The value that is approximately 80% of the set tire pressure during initialization*1 and the lower limit threshold value*2 are both displayed on the GTS, and the higher of the two values is set as the tire pressure warning threshold value.


            GTS Data List Item

          • *1: "Initial Threshold of Low-pressure"

          • *2: "Threshold of Low-pressure (Lower Limit)"

          Note

          If the tire pressure is decreased approximately 20 kPa (0.2 kgf/cm2, 2.9 psi) or more in order to adjust the tire pressure, even if the adjusted tire pressure is 80% or more than the tire pressure set during system initialization, the tire pressure warning light may illuminate if the tire pressure drops below 80% of the tire pressure set when the tires are warmed. In this case, perform initialization again.

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

    B

    GO TO STEP 11 Click here

    A

  4. CHECK ECU CONNECTED TO CAN BUS*


    1. Check the ECUs connected to the CAN bus.

      Click here

      Result
      Result Proceed to
      No malfunction appears A
      Malfunction appears B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  5. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)*


    1. Check for DTCs.

      Click here

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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  6. CHECK FOR DTC*


    1. Check for DTCs.

      Click here

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

    B

    PROBLEM SYMPTOMS TABLE Click here

    A

  7. DTC CHART


    1. Refer to Diagnostic Trouble Code Chart.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 10 Click here

  8. PROBLEM SYMPTOMS TABLE


    1. Refer to Problem Symptoms Table.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CIRCUIT INSPECTION*


    1. Refer to Electronic Circuit Inspection Procedure.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  10. REPAIR OR REPLACE


    1. Repair or replace parts based on the diagnosis result.

      Result
      Proceed to
      NEXT

    NEXT

  11. CONFIRMATION TEST*


    1. Check the Data List to confirm that the tire inflation pressure has been received.

      Click here

    2. Perform initialization.

      Click here

    3. Confirm that the initialization has been completed.

      Result
      Proceed to
      NEXT

    NEXT

    END