Lexus GX 460 2020 Owner's Manual page 383

382
4-5. Using the driving support systems
Operating tips
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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 to select a lower shift range.
The system will not operate when
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The transfer mode is in H4.
If the downhill assist control system indicator flashes
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In the following situations, the indicator flashes and the system will not operate:
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• The transfer mode is not in L4.
• The shift lever is in P.
• The accelerator or brake pedal is depressed.
• The vehicle speed exceeds approximately 25 km/h (15 mph).
• The brake system overheats.
In the following situations, the indicator flashes to alert the driver, but the system will
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operate:
• The shift lever is in N.
• 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
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This may cause the brake actuator to overheat. In this case, the downhill assist control
system will stop operating, a buzzer will sound and the downhill assist control system
indicator will start flashing, and the "TRC OFF" indicator light will come on. Refrain from
using the system until the downhill assist control system indicator stays on and "TRC
OFF" indicator light turns off. (The vehicle can be driven normally during this time.)
Sounds and vibrations caused by the downhill assist control system
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A sound may be heard from the engine compartment when the engine is started or just
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after the vehicle begins to move. This sound does not indicate that a malfunction has
occurred in downhill assist control system.
Either of the following conditions may occur when the downhill assist control system is
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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
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In the following cases, have your vehicle checked by your Lexus dealer.
The downhill assist control system indicator does not come on when the engine switch
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is turned to IGNITION ON mode.
The downhill assist control system indicator does not come on when the "DAC" switch
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is shifted to ON.
The slip indicator comes on.
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GX460_OM_OM60R28E_(GE)