TIRE PRESSURE WARNING SYSTEM


  1. OUTLINE


    1. Since tire pressure decreases over time, regular adjustments are necessary. When the tire pressure warning system detects that the tire inflation pressure becomes lower than the threshold, it will illuminate the tire pressure warning light to warn the driver.

    2. A direct-sensing type tire pressure warning system is used.

    3. The tire pressure warning ECU and receiver receives tire pressure, temperature and ID code information from the 4 tire pressure warning valve and transmitters.

    4. The tire pressure warning ECU and receiver is equipped with a built-in tire pressure warning ECU. The tire pressure warning ECU monitors the tire pressure warning valve and transmitters to detect low tire pressure in each of the 4 tires (excluding the spare tire).

    5. The operation of the tire pressure warning system includes a warning function, initial check function, initialization function and diagnosis function.

  2. MAJOR DIFFERENCE


    1. The new models have been modified from the previous models as shown below:


      1. A tire pressure warning system has been adopted on some models.

  3. PRECAUTION


    1. The system is disabled in the following conditions (when the condition becomes normal, the system will work properly.):


      1. When all of the tires and wheels that have the tire pressure warning valve and transmitters, registered with the tire pressure warning ECU and receiver have not been installed.

      2. When all of the transmitter ID codes are not registered with the tire pressure warning ECU and receiver.

      3. When the tire inflation pressure is 480 kPa (70 psi, 4.8 bar) or higher.

      4. When the transmitter battery is depleted.

    2. The system may become disabled in the following conditions (when the condition becomes normal, the system will work properly):


      1. When electric devices or facilities using similar radio wave frequencies are nearby.

      2. When a wireless device or other equipment operating at a similar frequency is in use in the vehicle.

      3. When a window tint that affects the radio wave signals is installed.

      4. When there is a lot of snow or ice on the vehicle, in particular around the wheels or wheel housings.

      5. When non-genuine wheels are used.

      6. When tire chains are used.

      7. When an aftermarket tire repair sealant is used.

    3. The tire pressure warning light may illuminate due to natural pressure loss caused by air passing through the tires or by changes in tire pressure caused by temperature fluctuations. When adjusting tire pressure, please be aware of the driving conditions and temperature conditions. The tire pressure warning light is prone to illuminate especially in late autumn and during winter.

    4. People with implantable cardiac pacemakers or implantable cardioverter-defibrillators should not come within 45 cm (1.48 ft.) of the initiators. The initiators emit electrical waves for tire position determination which could interfere with the operation of such devices.