Toyota 2005 Sienna Owner's Manual page 202

When the traction control system is oper-
ating, the following conditions occur:
The system controls the spinning of the
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4 wheels. At this time, the slip indica-
tor light blinks.
You may feel vibration or noise in your
D
vehicle, caused by operation of the
brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few
seconds when the ignition key is turned
to "ON". If the indicator light does not
come on when the ignition is turned on,
contact your Toyota dealer.
194
05 SIENNA_U (L/O 0409)
"VSC" warning light
This light warns that there is a problem
somewhere in the traction control system
or the vehicle stability control system.
The light will come on when the ignition
key is turned to "ON" and will go off after
a few seconds.
If the light comes on while driving, the
system does not work. However, as con-
ventional braking operates when applied,
there is no problem to continue your driv-
ing.
In the following cases, contact your Toyota
dealer:
The warning light does not come on
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after the ignition key is turned to "ON".
The warning light remains on after the
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ignition key is turned to "ON".
The warning light comes on while driv-
D
ing.
2005 SIENNA from Sep. '04 Prod. (OM45431U)