DAC (Downhill Assist Control system)
The DAC helps to prevent excessive speed on steep downhill slopes.
The system will operate when the vehicle is traveling under 15 mph (25 km/h) and the four-wheel drive control switch is in the L4 position.
System operation
Shift the “DAC” switch to ON.
The downhill assist control indi- cator light comes on and the system will operate.
When the system is in operation, the slip indicator light will flash, and the stop lights/high mounted stop lights will be lit.
Turning off the system
Shift the “DAC” switch to OFF while the system is in operation. The downhill assist control indicator will flash as the system gradually ceases operation, and will turn off when the system is fully off.
Shift the “DAC” switch to ON while the downhill assist control indi- cator is flashing to start the system again.
Operating tips
The system will operate when the shift lever is in a position other than P, however to make effective use of the system it is recommended that the shift lever be shifted to 2 or 1 range of S mode.
If the four-wheel drive control switch is in H4
The system does not operate.
When the downhill assist control system is operated continuously
This may cause the brake actuator to overheat. In this case, the downhill assist con- trol system will stop operating, a buzzer will sound and the DAC indicator will start flashing, and the TRAC OFF will be shown on the multi-information display. Refrain from using the system until the DAC indicator stays on and the message goes off.
(The vehicle can be driven normally during this time.)
Sounds and vibrations caused by the DAC
• 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 malfunction has occurred in DAC.
• Either of the following conditions may occur when the DAC 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
• The DAC indicator does not come on when the “ENGINE START STOP” switch is turned to IGNITION ON mode.
• The “DAC” indicator does not come on when the “DAC” switch is pressed.
• The slip indicator comes on.
In the above cases, have your vehicle checked by your Lexus dealer
CAUTION
When using downhill assist control
Do not rely overmuch on the downhill assist control. This function does not extend the vehicle’s performance limitations. Always thoroughly check the road conditions, and drive safely.
The system may not operate on the following surfaces, which may lead to an accident causing death or serious injury
• Slippery surfaces such as wet or muddy roads
• Icy surface
• Unpaved roads
See also:
Cleaning and protecting the vehicle interior
The following procedures will help protect your vehicle’s interior and
keep it in top condition:
- Protecting the vehicle interior
Remove dirt and dust using a vacuum cleaner. Wipe dirty sur-
fa ...
Key information
Keys
Using the mechanical key
To take out the mechanical key, slide the release lever and take the key out.
After using the mechanical key, store it in the electronic key. Carry the mechanical
...
Customizing Your Lexus
Your vehicle includes a variety of electronic features that can be
personalized to your
preferences. Programming these preferences requires specialized equipment and
may
be performed by an autho ...