Toyota 2012 Highlander Owner's Manual page 204

2-4. Using other driving systems
■
Sounds and vibrations caused by the ABS, TRAC, Enhanced VSC and
brake assist
●
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 when 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.
■
Reduced effectiveness of EPS
The effectiveness of EPS 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 sys-
tem should return to normal within 10 minutes.
■
If the slip indicator comes on...
It may indicate a malfunction in the Enhanced VSC and TRAC. Contact your
Toyota dealer.
CAUTION
■
The ABS does not operate effectively when
●
Tires with inadequate gripping ability are used (such as excessively worn
tires on a snow covered road).
●
The vehicle hydroplanes while driving at high speed on wet or slick road.
226