Toyota 2013 Avalon Owner's Manual page 175

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4-5. Using the driving support systems
When the TRAC/VSC systems are operating
The slip indicator light will flash
while the TRAC/VSC systems are
operating.
Disabling the TRAC system
If the vehicle gets stuck in mud, dirt or snow, the TRAC system may
reduce power from the engine to the wheels. Pressing the switch to
turn the system off may make it easier for you to rock the vehicle in
order to free it.
To turn the TRAC system off,
quickly press and release the
switch.
The "TRAC OFF" indicator light
should come on and message will
be shown on the multi-information
display.
Press the switch again to turn the
system back on.
AVALON (U)_(OM41440U)