Toyota SIENNA 2011 Quick Reference Manual page 354

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Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur,
refrain from excessive steering input or stop the vehicle and turn the engine
off. The EPS system should return to normal within 10 minutes.
CAUTION
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ABS does not operate effectively when
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Tires with inadequate gripping ability are used (such as excessively worn
tires on a snow covered road).
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The vehicle hydroplanes while driving at high speed on wet or slick roads.
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Stopping distance when ABS is operating will exceed that of normal
conditions
The ABS is not designed to shorten the vehicle's stopping distance. Always
maintain a safe distance from the vehicle in front of you in the following situ-
ations.
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When driving on dirt, gravel or snow-covered roads
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When driving with tire chains
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When driving over bumps in the road
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When driving over roads with potholes or roads with uneven surfaces
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TRAC may not operate effectively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRAC system is operating.
Do not drive the vehicle in conditions where stability and power may be lost.
I n f o r ma t i o n P r o v i d e d b y :
2-4. Using other driving systems
2
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