Toyota 2014 Sienna Manual page 332

2-4. Using other driving systems
■
Active Torque Control 4WD (AWD models only)
Automatically switches from front-wheel drive to AWD (All-Wheel Drive)
according to driving conditions, helping to ensure reliable handling and
stability. Examples of conditions where the system will switch to AWD
are when cornering, going uphill, starting off or accelerating, and when
the road surface is slippery due to snow or rain etc.
■
VDIM (Vehicle Dynamics Integrated Management) (if
equipped)
Provides integrated control of the ABS, brake assist, TRAC, VSC, hill-
start assist control, and EPS systems
Helps to maintain vehicle stability when swerving on slippery road sur-
faces by controlling the brakes and engine output
■
PCS (Pre-Collision System) (if equipped)
P. 340
When the Enhanced VSC/TRAC systems are operating
332
SIENNA_OM_OM45483U_(U)
If the vehicle is in danger of slip-
ping or if any of the drive wheels
spins, the slip indicator light
flashes to indicate that the
Enhanced VSC/TRAC systems
are operating.