Tire Pressure Warning System Initialization

Tire Pressure Warning System Reset Procedure

The tire pressure warning system needs to be initialized in the following conditions:

- When the low pressure warning light blinks twice every second.
- After replacing or rotating tires or wheels.

When initializing the system, the present tire condition is stored as a standard.

To initialize the system, perform the following:

1. Park the vehicle at a safe place and apply the parking brake. Stop the engine.
2. Adjust the pressure of all of the installed tires to the specified level.
3. Turn the ignition key to "ON".
4. With the vehicle stopped, push the reset switch on the left lower instrument panel and hold until the low tire pressure warning light blinks three times.

Initialization is completed after driving at speeds of 19 mph (30 km/h) or over for about a few hours total, when the tire pressure monitoring system detects the normal tire pressure. If the following conditions are satisfied, intitialization will be completed in about one hour.

- The vehicle speed varies between 19 mph (50 km/h) and 50 mph (80 km/h).
- Normal road surface.

When the warning light blinks twice every second while driving, you may be unable to reset the system. In this case set the system again according to the above procedure.

Do not push the reset switch without adjusting the tire inflation pressure to the specified level. Otherwise, the low pressure warning may not turn on even if the tire inflation pressure is low, or it may turn on when the tire inflation pressure is actually normal.

If you push the reset switch while driving, initialization is not performed.

If the low pressure warning light does not blink when you push and hold the reset switch, have the low pressure warning system checked by an authorized Lexus dealer.