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366
4-5. Using the driving support systems
assist control system indicator is flashing to
start the system again.
Operating tips
■
The system will operate when the shift posi-
tion is in a 1 range of M mode or R.
■
If the downhill assist control system indi-
cator flashes
In the following situations, the indicator
●
flashes and the system will not operate:
• The shift position is in a position other 1
range of M mode or R.
• The accelerator or brake pedal is
depressed.
• The vehicle speed exceeds approxi-
mately 15 mph (25 km/h).
• The brake system overheats.
●
In the following situation, the indicator
flashes to alert the driver, but the system
will operate:
• The "DAC" switch is turned off while the
system is operating.
The system will gradually ceases operation.
The indicator will flash during operation,
and then go off when the system is fully off.
When the downhill assist control system
■
is operated continuously
This may cause the brake actuator to over-
heat. In this case, the downhill assist control
system will stop operating, a buzzer will
sound and the downhill assist control sys-
tem indicator will start flashing, and the
"Traction Control Turned OFF" will be
shown on the multi-information display.
Refrain from using the system until the
downhill assist control system indicator
stays on and the "Traction Control Turned
OFF" goes off. (The vehicle can be driven
normally during this time.)
Sounds and vibrations caused by the
■
downhill assist control system
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 indicate that a mal-
function has occurred in downhill assist
control system.
●
Either of the following conditions may
occur when the downhill assist control
system is operating. None of these are
indicators 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.
■
System malfunction
In the following cases, have your vehicle
checked by your Lexus dealer.
●
The downhill assist control system indica-
tor does not come on when the engine
switch is turned to ON.
●
The downhill assist control system indica-
tor does not come on when the "DAC"
switch is pressed.
The slip indicator comes on.
●
WARNING
When using downhill assist control
■
system
Do not rely overmuch on the downhill
assist control system. This function does
not extend the vehicle's performance
limitations. Always thoroughly check the
road conditions, and drive safely.
■
Situations in which the system may
not operate properly
The system may not operate on the fol-
lowing surfaces, which may lead to an
accident causing death or serious injury.
Slippery surfaces such as wet or
●
muddy roads
Icy surface
●
●
Unpaved roads
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