Toyota 2014 Sienna Manual page 690

4-3. Do-it-yourself maintenance
Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and
transmitters must also be installed.
When new tire pressure warning valves and transmitters are
installed, new ID codes must be registered in the tire pressure warn-
ing computer and the tire pressure warning system must be initial-
ized. Have tire pressure warning valve and transmitter ID codes
registered by your Toyota dealer. (P. 692)
Initializing the tire pressure warning system
When the tire size is changed, the tire pressure warning system must
be initialized.
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.
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How to initialize the tire pressure warning system
STEP 1
Park the vehicle in a safe place and turn the engine switch
(vehicles without a smart key system) or the "ENGINE START
STOP" switch (vehicles with a smart key system) off.
Initialization cannot be performed while the vehicle is moving.
STEP 2
Adjust the tire inflation pressure to the specified cold tire infla-
tion pressure level. (P. 807)
Make sure to adjust the tire pressure to the specified cold tire
inflation pressure level. The tire pressure warning system will
operate based on this pressure level.
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