Toyota Sienna Service Manual: Description of initialization
(a) Perform initialization in the following cases:
- Before delivery of a new vehicle.
- After replacement of the tire pressure warning ECU*.
- After replacement of the tire pressure warning valve and transmitter.
- Specified tire pressure changes depending on the size or type of the tire.
*: Perform initialization after the transmitter ID registration is completed (See page TW-20).
(b) Before initialization
(1) Set the air pressure of all tires to the specified value.
Cold tire inflation pressure 
NOTICE: Perform the tire pressure adjustment after the vehicle has sufficiently cooled down. If the vehicle is not sufficiently cooled down, increase the air pressure by 20 to 30 kPa (0.2 to 0.3 kgf/cm2, 2.9 to 4.3 psi) above the specified value.
Initialization
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Initialization procedure
(a) Make sure that the ignition switch is off.
(b) Connect the intelligent tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select "TIREPRESS" by followi ...
Other materials:
Wireless remote control/
electronic key battery
Replace the battery with a new one if it is depleted.
You will need the following items:
Flathead screwdriver
Lithium battery CR2032
Replacing the battery
Vehicles without a smart key system
Remove the cover using a coin
protected with tape etc.
Remove the deplete ...
Other functions
Switching between outside air and recirculated air modes
Press .
The mode switches between outside air mode (
appears on the
display) and recirculated air mode (
appears on the display) each
time the button is pressed.
Defogging the windshield
Defoggers are used to defog the windshield a ...
Installation
1. INSTALL HIGH MOUNTED STOP LIGHT ASSEMBLY
2. INSTALL REAR SPOILER
Install the rear spoiler with the 3 nuts and 2 clips.
Connect the center stop light connector.
3. INSTALL BACK DOOR CENTER GARNISH
Engage the 5 clips to install the back door center
garnish.
...