Get OPERATIONOFINSTRUMENTSANDCONTROLS -> Downhill assist control system Guide for Toyota 4 Runner SUV Fourth Generation (2003-2009)

07 12.25

Downhill assist control system

(four−wheel drive models)

The downhill assist control system is a

system that assists the deceleration of

the engine brake when you drive down

a steep hill. When you are driving down

a hill with the four−wheel drive control

switch knob (full−time four−wheel drive

models) or multi−mode control switch

knob (multi−mode four−wheel drive

models) in the “L4” position, push the

“DAC” switch to limit the vehicle’s ac-

celeration. If the vehicle is traveling at

a speed of 25 km/h (15 mph) or less,

you can descend at a constant speed.

TO ACTIVATE THE DOWNHILL ASSIST

CONTROL SYSTEM

1. Full−time four−wheel drive models—

Turn the four−wheel drive control

switch knob to the “L4” position.

The system will not operate if the four−

wheel drive control switch knob is in the

“H4” position.

CY16020

Multi−mode four−wheel drive mod-

els—Turn the multi−mode control

switch knob to the “L4” position.

The system will not operate if the multi−

mode control switch knob is in the “H4”

position.

3. Push the “DAC” switch to turn the

system on. The downhill assist con-

trol system indicator light on the in-

strument panel will come on.

CAUTION

2. In order to make full use of the en-

gine brake, putting the transmission

in “L” or “2” is recommended.

Do not rely excessively on the down-

hill assist control system. It may not

be able to maintain a low speed over

road surfaces or off−road surfaces on

which sliding can easily occur, such

as extremely steep slopes or icy or

muddy roads.

Full−time four−wheel drive models—If the

downhill assist control system indicator

light flashes, the selector lever may be in

“N” or the four−wheel drive control switch

knob may be in the “H4” position.

The system will operate even if the trans-

mission selector lever is in “D”, “4”, “3”

or “N”. However, when it is in “L” or “2”

the engine brake can also be utilized en-

abling the system to operate more effec-

tively.

If the indicator light does not come on

when the switch is pushed, contact your

Toyota dealer.

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Multi−mode four−wheel drive models—If

the downhill assist control system indica-

tor light flashes, the selector lever may be

in “N” or the multi−mode control switch

knob may be in the “H2” or “H4” position.

The slip indicator light and downhill assist

control system indicator light come on for

a few seconds when the engine switch is

turned to “ON”. If any of the indicator

lights does not come on when the engine

switch is turned on, contact your Toyota

dealer.

If the indicator light does not come on

when the switch is pushed, contact your

Toyota dealer.

CY16073

The brake actuator temperature increases

during continuous operation of the hill−

start assist control system, the active

traction control system and the vehicle

stability control system. If the brake ac-

tuator temperature becomes too high while

any of the systems is operating, a buzzer

will start to sound intermittently to indicate

that the downhill assist control system can

no longer operate. In this case, stop your

vehicle immediately at a safe place.

With the vehicle traveling at a speed of

25 km/h (15 mph) or less, release your

foot from the accelerator or brake pedal

to activate the system. The vehicle will

descend the hill at a low speed. While the

system is operating, the slip indicator light

on the instrument panel will flash and the

stop lights and high mounted stoplight will

be lit.

If the system continues to operate, the

buzzer sound changes from intermittent to

continuous.

(The

continuous

buzzer

sounds for about 3 seconds.)

If you push the “DAC” switch to turn the

system off while it is in operation, the

system will stop operating gradually. The

downhill assist control system indicator

light will flash to alert the driver. To con-

tinue driving at a low speed, push the

“DAC” switch to turn the system on.

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At this time, the slip indicator light will

come on, the downhill assist control sys-

tem indicator light flash and the downhill

assist control system stops operating tem-

porarily in order to protect the brake ac-

tuator. (Although the downhill assist con-

trol system does not operate, it is no

problem to continue your driving.) The

system will be automatically restored after

a short time and the slip indicator light

and the downhill assist control system in-

dicator light go out.

“VSC OFF” warning light

When the system is normal and the en-

gine switch is turned to “ON”, the warning

light will come on and will go off after a

few seconds.

It is not a malfunction that the warning

light may stay on for 60 seconds after the

engine switch is turned to the “ON” posi-

tion.

CY16074

Depressing the brake pedal repeatedly

may turn on the light. It is normal if it

goes out after a few seconds.

If the warning light flashes while driving,

the system does not work. However, as

normal braking operates when being ap-

plied, it is no problem to continue your

driving.

If there is any abnormality in the sys-

tem, the “VSC OFF” warning light will

flash. When the “DAC” switch is

pushed, the downhill assist control sys-

tem indicator light also flash.

In the following cases, contact your Toyota

dealer:

If the “VSC OFF” warning light flashes,

there may be an abnormality in any of the

following systems in addition to the down-

hill assist control system.

D The warning light does not come on

after the engine switch is turned to

“ON”.

D Hill−start assist control system

D Active traction control system

D Vehicle stability control system

D The warning light remains on after the

engine switch is turned to “ON”.

D The warning light flashes while driving.

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OPERATIONOFINSTRUMENTSANDCONTROLS -> Downhill assist control system for Your Toyota 4 Runner SUV Fourth Generation (2003-2009)

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