TIRE PRESSURE WARNING SYSTEM


  1. OUTLINE


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

    2. Since tire pressure decreases over time, regular adjustments are necessary. When the tire pressure warning system detects that the pressure of a tire has dropped lower than the warning threshold, it will illuminate the tire pressure warning light to warn the driver.

    3. The 4 tire pressure warning valve and transmitters each send tire inflation pressure, temperature and ID code information to the tire pressure warning ECU and receiver.

    4. The tire pressure warning ECU and receiver, which consists of an antenna, a receiver and an ECU, monitors the tire pressure warning valve and transmitters to detect low tire pressure in each of the 4 tires.

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

    6. The transmission cycle with which the information is sent from a tire pressure warning valve and transmitter to the pressure warning ECU and receiver is determined as follows based on the travel mode and the acceleration sensor built into each tire pressure warning valve and transmitter. Since the acceleration sensor is used only to determine if the vehicle is being driven, the value of rotational acceleration is not sent to the tire pressure warning ECU and receiver.

      Travel Mode Transmission Cycle
      While stopped*1 1 time / 96 seconds
      While traveling*2 4 times / 64 seconds

      Tech Tips

      *1: When G that is applied to the acceleration sensor is less than 8G.

      *2: When G that is applied to the acceleration sensor is 8G or greater.

  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 added.

  3. PRECAUTION


    1. The system will be 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 pressure is 380 kPa (55 psi) (relative pressure) or more.

      4. When the transmitter battery is depleted. (Battery life: approximately 10 years)

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


      1. When electric devices or facilities using similar radio 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 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 aftermarket tire repair sealant is used.

    3. The tire pressure warning system may not function properly if aftermarket tire repair sealant has been used to repair a flat tire. If this type of sealant has been used, the tire pressure warning valve and transmitter should be replaced with a new one after repairing or replacing the tire.

    4. 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 warning light is prone to illuminate especially in late fall and during winter.