Toyota 2011 Matrix Owner's Manual page 374

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How to initialize the tire pressure warning system
Park the vehicle in a safe place and turn the engine switch
STEP 1
OFF.
While the vehicle is moving, initialization is not performed.
Adjust the tire inflation pressure to the specified cold tire infla-
STEP 2
tion pressure level. (→P. 454)
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.
Turn the engine switch to the "ON" position.
STEP 3
STEP 4
Wait for a few minutes with the engine switch in the "ON" posi-
STEP 5
tion, and then turn the engine switch to the "LOCK" position.
4-3. Do-it-yourself maintenance
Push and hold the tire pressure
warning reset switch until the tire
pressure warning light blinks
slowly 3 times.
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