2019-2022 Toyota Avalon 4 Door Driving -> Driving assist systems User Manual
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Driving -> Driving assist systems for Your Toyota Avalon 4 Door Fifth Generation (2019-2022)

309  
4-5. Using the driving support systems  
Driving assist syst em s  
To keep driving safety and performance, the following systems  
operate automatically in response to various driving situations.  
Be aware, however, that these systems are supplementary and  
should not be relied upon too heavily when operating the vehi-  
cle.  
◆ ABS (Anti-lock Brake System)  
Helps to prevent wheel lock when the brakes are applied suddenly,  
or if the brakes are applied while driving on a slippery road surface  
◆ Brake assist  
Generates an increased level of braking force after the brake pedal  
is depressed when the system detects a panic stop situation  
4
◆ VSC (Vehicle Stability Control)  
Helps the driver to control skidding when swerving suddenly or  
turning on slippery road surfaces.  
◆ Enhanced VSC (Enhanced Vehicle Stability Control)  
Provides cooperative control of the ABS, TRAC, VSC and EPS.  
Helps to maintain directional stability when swerving on slippery  
road surfaces by controlling steering performance.  
◆ TRAC (Traction Control)  
Helps to maintain drive power and prevent the drive wheels from  
spinning when starting the vehicle or accelerating on slippery roads  
◆ Active Cornering Assist (ACA) (if equipped)  
Helps to prevent the vehicle from sliding to the outer side by per-  
forming inner wheel brake control when attempting to accelerate  
while turning  
◆ Hill-start assist control  
Helps to reduce the backward movement of the vehicle when start-  
ing on an uphill  
310  
4-5. Using the driving support systems  
◆ EPS (Electric Power Steering)  
Employs an electric motor to reduce the amount of effort needed to  
turn the steering wheel  
◆ Adaptive Variable Suspension System (if equipped)  
By independently controlling the damping force of the shock  
absorbers for each of the 4 wheels according to the road and driv-  
ing conditions, this system helps riding comfort with superior vehi-  
cle stability, and helps good vehicle posture (P. 305)  
◆ The Secondary Collision Brake  
When the SRS airbag sensor detects a collision and the system  
operates, the brakes and stop lights are automatically controlled to  
reduce the vehicle speed and help reduce the possibility of further  
damage due to a secondary collision.  
◆ Dynamic Torque Control AWD system (if equipped)  
Automatically switches from front-wheel drive to all-wheel drive  
(AWD) according to the driving conditions, helping to ensure reli-  
able handling and stability. Examples of conditions where the sys-  
tem will switch to AWD are when cornering, going uphill, starting off  
or accelerating, and when the road surface is slippery due to snow,  
rain, etc.  
When the TRAC/VSC systems are operating  
The slip indicator light will flash  
while the TRAC/VSC systems are  
operating.  
311  
4-5. Using the driving support systems  
Disabling the TRAC system  
If the vehicle gets stuck in mud, dirt or snow, the TRAC system may  
reduce power from the engine to the wheels. Pressing  
to turn  
the system off may make it easier for you to rock the vehicle in order  
to free it.  
To turn the TRAC system off,  
quickly press and release  
.
“Traction Control Turned Off” will  
be shown on the multi-information  
display.  
Press  
again to turn the sys-  
4
tem back on.  
312  
4-5. Using the driving support systems  
■Turning off both TRAC and VSC systems  
To turn the TRAC and VSC systems off, press and hold  
seconds while the vehicle is stopped.  
for more than 3  
The VSC OFF indicator light will come on and the “Traction Control Turned  
Off” will be shown on the multi-information display*.  
Press  
again to turn the system back on.  
*: Pre-collision brake assist and pre-collision braking will also be disabled.  
The PCS warning light will come on and the message will be shown on the  
multi-information display. (P. 236)  
■When the message is displayed on the multi-information display show-  
ing that TRAC has been disabled even if  
has not been pressed  
TRAC is temporary deactivated. If the information continues to show, contact  
your Toyota dealer.  
■Operating conditions of hill-start assist control  
When the following four conditions are met, the hill-start assist control will  
operate:  
●The shift lever is in a position other than P or N (when starting off forward/  
backward on an upward incline)  
●The vehicle is stopped  
●The accelerator pedal is not depressed  
●The parking brake is not engaged  
■Automatic system cancelation of hill-start assist control  
The hill-start assist control will turn off in any of the following situations:  
●The shift lever is shifted to P or N  
●The accelerator pedal is depressed  
●The parking brake is engaged  
●2 seconds at maximum elapsed after the brake pedal is released  
313  
4-5. Using the driving support systems  
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and  
hill-start assist control systems  
●A sound may be heard from the engine compartment when the brake pedal  
is depressed repeatedly, when the engine is started or just after the vehicle  
begins to move. This sound does not indicate that a malfunction has  
occurred in any of these systems.  
●Any of the following conditions may occur when the above systems are  
operating. None of these indicates that a malfunction has occurred.  
• Vibrations may be felt through the vehicle body and steering.  
• A motor sound may be heard also after the vehicle comes to a stop.  
• The brake pedal may pulsate slightly after the ABS is activated.  
• The brake pedal may move down slightly after the ABS is activated.  
■EPS operation sound  
When the steering wheel is operated, a motor sound (whirring sound) may be  
heard. This does not indicate a malfunction.  
■Active Cornering Assist operation sounds and vibrations  
When the Active Cornering Assist is operated, operation sounds and vibra-  
tions may be generated from the brake system, but this is not a malfunction.  
4
■Automatic reactivation of TRAC and VSC systems  
After turning the TRAC and VSC systems off, the systems will be automati-  
cally re-enabled in the following situations:  
●When the engine switch is turned off  
●If only the TRAC system is turned off, the TRAC will turn on when vehicle  
speed increases  
If both the TRAC and VSC systems are turned off, automatic re-enabling will  
not occur when vehicle speed increases.  
■Operating conditions of Active Cornering Assist  
The system operates when the following occurs.  
●TRAC/VSC can operate  
●The driver is attempting to accelerate while turning  
●The system detects that the vehicle is sliding to the outer side  
●The brake pedal is released  
■Secondary Collision Brake operating conditions  
The system operates when the SRS airbag sensor detects a collision while  
the vehicle is in motion.  
However, the system does not operate in any of the following situations.  
●The vehicle speed is below 6 mph (10 km/h)  
●Components are damaged  
314  
4-5. Using the driving support systems  
■Secondary Collision Brake automatic cancellation  
The system is automatically canceled in any of the following situations.  
●The vehicle speed drops below approximately 6 mph (10 km/h)  
●A certain amount of time elapses during operation  
●The accelerator pedal is depressed a large amount  
■Reduced effectiveness of the EPS system  
The effectiveness of the EPS system is reduced to prevent the system from  
overheating when there is frequent steering input over an extended period of  
time. The steering wheel may feel heavy as a result.  
Should this occur, refrain from excessive steering input or stop the vehicle  
and turn the engine off. The EPS system should return to normal within 10  
minutes.  
■If a message about AWD is shown on the multi-information display  
Perform the following actions.  
Message  
Details/Actions  
AWD system is overheating.  
Perform the following actions.  
• Reduce the vehicle speed until the mes-  
sage disappears.  
• Stop the vehicle in a safe place and let  
the engine idle.  
Once the display message on the multi-  
information display turns off, there is no  
problem continuing to drive.  
“AWD System Overheated  
Switching to 2WD Mode”  
If the message does not disappear, have  
your vehicle checked by your Toyota dealer  
immediately.  
The vehicle switched from all-wheel drive  
(AWD) to front wheel drive due to overheat-  
ing.  
Perform the following actions.  
• Reduce the vehicle speed until the mes-  
sage disappears.  
• Stop the vehicle in a safe place and let  
the engine idle.  
“AWD System Overheated  
2WD Mode Engaged”  
Once the display message on the multi-  
information display turns off, the AWD sys-  
tem returns to normal.  
If the message does not disappear, have  
your vehicle checked by your Toyota dealer  
immediately.  
“AWD System Malfunction  
2WD Mode Engaged  
Visit Your Dealer”  
A malfunction occurred in the AWD system.  
Have your vehicle checked by your  
Toyota dealer immediately.  
315  
4-5. Using the driving support systems  
WARNING  
■The ABS does not operate effectively when  
●The limits of tire gripping performance have been exceeded (such as  
excessively worn tires on a snow covered road).  
●The vehicle hydroplanes while driving at high speed on wet or slick roads.  
■Stopping distance when the ABS is operating may exceed that of nor-  
mal conditions  
The ABS is not designed to shorten the vehicle’s stopping distance. Always  
maintain a safe distance from the vehicle in front of you, especially in the  
following situations:  
●When driving on dirt, gravel or snow-covered roads  
●When driving with tire chains  
●When driving over bumps in the road  
●When driving over roads with potholes or uneven surfaces  
■TRAC/VSC may not operate effectively when  
4
Directional control and power may not be achievable while driving on slip-  
pery road surfaces, even if the TRAC/VSC system is operating.  
Drive the vehicle carefully in conditions where stability and power may be  
lost.  
■Active Cornering Assist does not operate effectively when  
●Do not overly rely on Active Cornering Assist. Active Cornering Assist may  
not operate effectively when accelerating down slopes or driving on slip-  
pery road surfaces.  
●When Active Cornering Assist frequently operates, Active Cornering  
Assist may temporarily stop operating to:  
• Ensure proper operation of the brakes, TRAC and VSC.  
• Prevent the brakes from overheating.  
316  
4-5. Using the driving support systems  
WARNING  
■Hill- start assist control does not operate effectively when  
●Do not overly rely on hill-start assist control. Hill-start assist control may  
not operate effectively on steep inclines and roads covered with ice.  
●Unlike the parking brake, hill-start assist control is not intended to hold the  
vehicle stationary for an extended period of time. Do not attempt to use  
hill-start assist control to hold the vehicle on an incline, as doing so may  
lead to an accident.  
■When the TRAC/VSC is activated  
The slip indicator light flashes. Always drive carefully. Reckless driving may  
cause an accident. Exercise particular care when the indicator light flashes.  
■When the TRAC/VSC systems are turned off  
Be especially careful and drive at a speed appropriate to the road condi-  
tions. As these are the systems to help ensure vehicle stability and driving  
force, do not turn the TRAC/VSC systems off unless necessary.  
■Replacing tires  
Make sure that all tires are of the specified size, brand, tread pattern and  
total load capacity. In addition, make sure that the tires are inflated to the  
recommended tire inflation pressure level.  
The ABS, TRAC and VSC systems will not function correctly if different tires  
are installed on the vehicle.  
Contact your Toyota dealer for further information when replacing tires or  
wheels.  
■Handling of tires and the suspension  
Using tires with any kind of problem or modifying the suspension will affect  
the driving assist systems, and may cause a system to malfunction.  
■Secondary Collision Brake  
Do not rely solely upon the Secondary Collision Brake. This system is  
designed to help reduce the possibility of further damage due to a second-  
ary collision, however, that effect changes according to various conditions.  
Overly relying on the system may result in death or serious injury.  

Related Topics

Driving
Before driving (Driving the vehicle) Cargo and luggage Vehicle load limits Trailer towing Dinghy towing Driving procedures Engine (ignition) switch Automatic transmission Turn signal lever Parking brake Brake Hold Operating the lights and wipers Headlight switch Automatic High Beam Windshield wipers and washer Refueling Using the driving support systems Toyota Safety Sense P PCS (Pre-Collision System) LDA (Lane Departure Alert with steering control) Dynamic radar cruise control BSM (Blind Spot Monitor) RCTA function Rear Camera Detection function Intuitive parking assist Intelligent Clearance Sonar (ICS) Driving mode select switches Driving tips (Winter driving tips)

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