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305
4-5. Using the driving support systems
4
Driving
HIGHLANDER_U (OM48E98U)
■ If the “DAC” switch is turned off during operation of the downhill assist
control system
The downhill assist control system gradually ceases operation. The downhill
assist control system indicator will flash during the canceling operation, and
then go off when the system is fully off.
■ Downhill assist control system operation sound
● A sound may be heard from the engine compartment during operation of the
downhill assist control system. This sound does not indicate a malfunction.
● If the accelerator or brake pedal is depressed during operation of the down-
hill assist control system, a sound caused by the release of system opera-
tion may be heard, or you may feel the brake pedal push-back. This does
not indicate a malfunction.
■ When the downhill assist control system operates continuously
The brake actuator may overheat. In that case, the downhill assist control
system will stop operating, a buzzer will sound and the downhill assist control
system indicator will start flashing. Refrain from using the system until the
downhill assist control system indicator stays on. (There is no problem with
continuing to drive normally.)
■ If the slip indicator comes on
It may indicate a malfunction in the system. Contact your Toyota dealer.
WARNING
■ Conditions which may affect the downhill assist control system opera-
tion
● Do not rely too heavily on the downhill assist control system. On extremely
steep inclines, icy surfaces or muddy roads, the vehicle may slip and the
system may not be able to maintain the constant low vehicle speed of
about 3 mph (5 km/h), leading to an accident causing death or serious
injury.
● Do not shift the shift lever to R while driving forward, or to D while driving
backward. Doing so may cause the wheels to lock up, leading to an acci-
dent causing death or serious injury. In addition, excessive stress will be
applied to the automatic transmission, possibly resulting in damage.
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