Toyota Prius 2011 Manual page 254

2-4. Using other driving systems
When the Enhanced VSC/TRAC is operating
Sounds and vibrations caused by the ABS, brake assist, TRAC and
■
Enhanced VSC
●
A sound may be heard from the engine compartment when the hybrid
system is started, just after the vehicle begins to move, if the brake pedal
is depressed forcefully or repeatedly, or 1 - 2 minutes after the hybrid
system is stopped. This sound does not indicate 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 the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
EPS operation sound
■
When the steering wheel operates, a motor sound (whirring sound) may be
heard.
This does not indicate a malfunction.
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If the vehicle is in danger of slip-
ping or if the front wheels spin,
the slip indicator light flashes to
indicate that the Enhanced VSC/
TRAC have been engaged.
A buzzer (intermittent) sounds to
indicate that Enhanced VSC is
operating.
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