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Tire Pressure Warning System: Precaution

  1. EXPRESSIONS OF IGNITION SWITCH 
    1. The type of ignition switch used on this model differs according to the vehicle specification.
      IGNITION SWITCH EXPRESSIONS

      Switch Type Ignition Switch (position) Engine Switch (condition)
      Expression Ignition switch off LOCK Off
      Ignition switch on (IG) ON On (IG)
      Ignition switch on (ACC) ACC On (ACC)
      Engine start START Start
  2. TIRE PRESSURE WARNING SYSTEM PRECAUTION 
    1. If the tire pressure warning light comes on, immediately check the tire pressure of the tire and adjust it to the specified value. (The tire pressure warning light will blink (come on after blinking for 1 minute) if there is an open in the tire pressure warning light circuit.)
      NOTE: Check the full-size spare tire as well since this system monitors pressure of all tires including the ground spare tire.
      Fig 1: Identifying Tire Pressure Warning Light
      G04977834Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Cold tire inflation pressure 

      COLD TIRE INFLATION PRESSURE

      Tire size Front kPa (kgf/cm2 , psi) Rear kPa (kgf/cm2 , psi)
      P215/60R16 94V (2GR-FE) 210 (2.1, 31)(1) 240 (2.4, 35)(2) 210 (2.1, 31)(1) 240 (2.4, 35)(2)
      P215/60R16 94V (2AZ-FE) 220 (2.2, 32)(1) 240 (2.4, 35)(2) 220 (2.2, 32)(1) 240 (2.4, 35)(2)
      P215/55R17 93V 220 (2.2, 32)(1) 240 (2.4, 35)(2) 220 (2.2, 32)(1) 240 (2.4, 35)(2)
      (1) For driving under 100 mph (160 km/h)
      (2) For driving at 100 mph (160 km/h) or over
    2. If the tire pressure warning light blinks (comes on after blinking for 1 minute), there is a malfunction in the system. Check for DTCs.
    3. It is necessary to register the transmitter ID in the tire pressure warning ECU after replacing the tire pressure warning valve and transmitter and/or tire pressure warning ECU (See REGISTRATION  ).
    4. When replacing the tire pressure warning ECU;
      1. Using the DATA LIST, read the transmitter IDs registered in the ECU and make a note of them before removing the tire pressure warning ECU.
      2. Register the transmitter IDs after installing a new tire pressure warning ECU.
    5. When replacing the tire pressure warning valve and transmitter;
      1. Take a note of the 7 digit number (transmitter ID) written on the new tire pressure warning valve and transmitter when replacing it. Register the transmitter IDs in the tire pressure warning ECU after replacing the tire pressure warning valve and transmitter and installing the tires and wheels on the vehicle.
        Fig 2: Identifying Transmitter ID (7 Digit Number) Location
        G05250258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        NOTE: The transmitter ID is written on the tire pressure warning valve and transmitter. It will be unable to be read after installing the tire pressure warning valve and transmitter on the tire and wheel. Therefore, take a note of the transmitter ID before installing the tire pressure warning valve and transmitter.
    6. When replacing the tire pressure warning ECU and the tire pressure warning valves and transmitters; It is necessary to perform the initialization (See INITIALIZATION  ) after the registration (See REGISTRATION  ).
    7. Precautions about the tire pressure;
      • The tire pressures decrease naturally.
      • In winter, tire pressure may decrease due to low ambient temperatures (tire pressure decreases by approximately 10 kPa (0.2 kgf/cm2 , 1.45 psi) for every 10°C (50°F) drop in the ambient temperature). Therefore, the tire pressure warning is more likely to operate if the tire pressures are not adjusted appropriately. If the daily temperature variation is large, add sufficient pressure to the tires so that the tire pressures are suitable under cold conditions. Incorrect tire pressure warning operation becomes less likely.
  3. IN CASE OF TIRE AND WHEEL REPLACEMENT 
    1. When tires and wheels are replaced, always ensure that each transmitter ID is correctly registered.
  4. INITIALIZATION PRECAUTION 
    1. Initialize the tire pressure warning system after any of the following is performed:
      • Replacing the tire pressure warning ECU or the tire pressure warning valve and transmitter
      • Installing tire(s) which require different tire pressure

      HINT:

      The tire pressure warning system will not operate properly if it is not initialized (See INITIALIZATION  ).

  5. FAIL-SAFE FUNCTION 
    1. If a system malfunction occurs in the tire pressure warning system, the tire pressure warning light blinks (comes on after blinking for 1 minute) and informs the driver of the system failure.
    2. The result of this diagnosis is stored in the tire pressure warning ECU.
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