Tire Pressure Warning System Initialization

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

- After replacing or rotating tires and wheels.
- After replacing the tire pressure sensor.

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 with the parking brake applied and apply the parking brake. Stop the engine.
2. Adjust the pressure of all of the installed tires to the specified level.
3. Start the engine.
4. Push and hold the reset switch until the low pressure warning light blinks three times.

Do not turn the engine off for about 20 minutes until initialization is complete.

When initializing the system, make sure the low tire pressure warning light blinks three times. If the warning light does not blink three times, initialization failed and the tire pressure warning system will not function properly. In this case initialize the system again.

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