Tire Monitoring System: Service and Repair

When initializing the system. the present tire inflation pressure is stored as standard. The tire pressure warning system determines decreased air pressure by comparing the present and the standard tire inflation pressures. When you change the set tire inflation pressure, it is necessary to initialize the tire pressure warning system.

- When rotating the tires on vehicles differing with front and rear tire inflation pressures.
- When changing the tire inflation pressure by changing travelling speed or load weight, etc.
- When changing tire size.

To initialize the system, perform the following:

1. Park the vehicle in a safe place and turn the ignition switch to the "LOCK" position.
2. Adjust the pressure of all installed tires to the specified cold tire inflation pressure level.
3. Turn the ignition key to the "ON" position.
4. Open the glove box, and push and hold the tire pressure warning reset switch until the tire pressure warning light blinks slowly three times.
5. Leave the system for a few minutes with the ignition switch in "ON" position, and then turn the ignition key to the "LOCK" position.

If you push the tire pressure reset switch while the vehicle is moving, Initialization is not performed.

If you push the tire pressure reset switch accidentally and initialization is performed, adjust the tire inflation pressure to the specified level and initialize the system again.

If the tire pressure warning light does not blink slowly three times when you push and hold the reset switch, initialization has failed and the tire pressure warning system may not work properly. In this case initialize the system again. If initialization cannot be performed, have the system checked by a Scion dealer.