Toyota Tundra Owners Manual: Driving assist systems

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

VSC (Vehicle Stability Control)

Helps the driver to control skidding when swerving suddenly or turning on slippery road surfaces

Trailer Sway Control

Helps the driver to control trailer sway by selectively applying brake pressure for individual wheels and reducing driving torque when trailer sway is detected

TRAC (Traction Control) for 2WD models and 2WD mode on 4WD models

Helps to maintain drive power and prevent the drive wheels from spinning when starting the vehicle or accelerating on slippery roads

Hill-start assist control

Helps to reduce the backward movement of the vehicle when starting on an uphill

When the TRAC/VSC/Trailer Sway Control systems are operating

The slip indicator light will flash while the TRAC/VSC/Trailer Sway Control systems are operating.

Disabling the TRAC systems

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.

■ Turning off TRAC system

2WD models and 2WD mode on 4WD models

To turn the TRAC system off, press .

The "AUTO LSD" indicator light will come on.

Press again to turn the system back on.

4H mode on 4WD models

To turn the TRAC system off, press .

The "TRAC OFF" indicator light will come on.

Press again to turn the system back on.

4L mode on 4WD models

To turn the TRAC system off, press and hold for more than 3 seconds while the vehicle is stopped.

The VSC off and "TRAC OFF" indicator light will come on.

Press again to turn the system back on.

■Turning off TRAC, VSC and Trailer Sway Control systems

2WD models and 2WD mode on 4WD models

To turn the TRAC, VSC and Trailer Sway Control systems off, stop the vehicle completely, and then press and hold for more than 3 seconds while the AUTO LSD system is activated.

4H mode on 4WD models

To turn the TRAC, VSC and Trailer Sway Control systems off, press and hold for more than 3 seconds while the vehicle is stopped.

The VSC off and "TRAC OFF" indicator light will come on.

Press again to turn the system back on.

■When the VSC or TRAC system is turned off by pressing the VSC off switch On vehicles with pre-collision system, 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.

■When the "TRAC OFF" indicator light comes on even if VSC off switch has not been pressed.

TRAC cannot be operated. 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

■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC, Trailer Sway Control 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.

■Automatic reactivation of TRAC, Trailer Sway Control and VSC systems After turning the TRAC, Trailer Sway Control and VSC systems off, the systems will be automatically 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.

■If the brake system overheats TRAC will cease operation, and the slip indicator will change from flashing to being on continuously to alert the driver. Stop the vehicle in a safe place.

(There is no problem with continuing normal driving.)

■Shifting to "4L" VSC and Trailer Sway Control are automatically turned off.