Toyota Sienna2013 Owner's Manual page 308

2-4. Using other driving systems
When the "TRAC OFF" indicator light comes on even if the VSC OFF
■
switch has not been pressed
TRAC and hill-start assist control cannot be operated. Contact your Toyota
dealer.
Sounds and vibrations caused by ABS, brake assist, Enhanced VSC
■
and TRAC
A sound may be heard from the engine compartment when the engine is
●
started or just after the vehicle begins to move. This sound does not indi-
cate that a malfunction has occurred in any of these systems.
Any of the following conditions may occur when the above systems are
●
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after ABS is activated.
• The brake pedal may move down slightly after ABS is activated.
EPS operation sound
■
When the steering wheel is operated, a motor sound (whirring sound) may
be heard. This does not indicate a malfunction.
Reactivation of the TRAC and VSC systems after turning off the engine
■
Turning off the engine after turning off the TRAC and VSC systems will auto-
matically reactivate them.
Reactivation of the TRAC system linked to vehicle speed
■
When only the TRAC system is turned off, the TRAC system will turn on
when vehicle speed increases. However, when both TRAC and VSC sys-
tems are turned off, the systems will not turn on even when vehicle speed
increases.
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