WhenDriving -> Antilock Brake System (ABS) for Your Toyota Yaris 4 Door Fourth Generation (2021-2026)

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3-6. ABS/TCS/DSC  
Antilock Brake System (ABS)  
The ABS control unit continuously monitors the speed of each  
wheel. If one wheel is about to lock up, the ABS responds by  
automatically releasing and reapplying that wheel’s brake.  
The driver will feel a slight vibration in the brake pedal and may hear a  
chattering noise from the brake system. This is normal ABS system  
operation. Continue to depress the brake pedal without pumping the  
brakes.  
The warning light turns on when the system has a malfunction.  
Refer to Contact Your Toyota Dealer and Have Vehicle Inspected on  
P. 493.  
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Braking distances may be longer on loose surfaces (snow or gravel, for  
example) which usually have a hard foundation. A vehicle with a normal  
braking system may require less distance to stop under these conditions  
because the tires will build up a wedge of surface layer when the wheels  
skid.  
The sound of the ABS operating may be heard when starting the engine or  
immediately after starting the vehicle, however, it does not indicate a mal-  
function.  
WARNING  
Do not rely on ABS as a substitute for safe driving  
The ABS cannot compensate for unsafe and reckless driving, excessive  
speed, tailgating (following another vehicle too closely), driving on ice and  
snow, and hydroplaning (reduced tire friction and road contact because of  
water on the road surface). You can still have an accident.  
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