Toyota COROLLA Owner's Manual page 237

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EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
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Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically
re-enabled in the following situations:
●Vehicles without a smart entry & start system: When the engine switch is
turned to the "LOCK" position.
Vehicles with a smart entry & start system: When the engine switch is
turned off
●If only the TRC system is turned off, the TRC will turn on when vehicle
speed increases
If both the TRC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.
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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.
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Operating conditions of hill-start assist control
When the following four conditions are met, the hill-start assist control will
operate:
●Vehicles with a continuously variable transmission: The shift lever is in a
position other than P or N (when starting off forward/backward on an upward
incline).
●Vehicles with a manual transmission: The shift lever is in a position other
than R when starting off forward on an upward incline or in R when starting
off backward on an upward incline.
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
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Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●Vehicles with a continuously variable transmission: The shift lever is moved
to P or N.
●Vehicles with a manual transmission: The shift lever is shifted to R when
starting off forward on an upward incline or from R when starting off back-
ward on an upward incline.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after the brake pedal is released.
4-6. Using the driving support systems
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