BRAKE CONTROL SYSTEM


  1. SYSTEM CONTROL


    1. When the vehicle starts off on a steep or slippery hill, the vehicle could descend backward when the driver switches from the brake pedal to the accelerator pedal, thus making it difficult for the vehicle to start off. To prevent this from occurring, hill-start assist control temporarily (approximately 2 seconds maximum) applies the brakes to all the wheels in order to prevent the vehicle from moving backward.

    2. Without hill-start assist control, the driver must quickly and precisely switch from the brake pedal to the accelerator pedal. With hill-start assist control, however, the driver can start off easily and operate the pedal in a relaxed manner because hill-start assist control prevents the vehicle from moving backward.

  2. OPERATING CONDITION


    1. The skid control ECU starts Hill-start Assist Control operation when the operating conditions below are met and the driver further depresses the brake pedal, causing the hydraulic pressure to exceed the control-start hydraulic pressure.

    2. When hill-start assist control operation starts, the buzzer in the combination meter assembly will sound once.

      Hill-start Assist Control Operation Condition

      • The shift position is in any position other than P.

      • The accelerator pedal is not depressed.

      • The vehicle is at a standstill.

      • The parking brake is not applied.
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    3. If any one of the below conditions is met during hill-start assist control operation, hill-start assist control will be canceled causing the slip indicator light to turn off.

    4. The buzzer in the combination meter assembly sounds twice and the slip indicator light turns off if the hill-start assist control is canceled.

      Conditions which cause hill-start assist control operation to be canceled a) The buzzer in the combination meter assembly does not sound and the slip indicator light turns off. The driver depresses the accelerator pedal.
      b) The buzzer in the combination meter assembly sounds twice and the slip indicator light turns off.

      • The driver changes the shift position to P.

      • The parking brake is applied.

      • The driver depresses the brake pedal.

      • The driver releases the brake pedal for several seconds.

      • The driver keeps the brake pedal depressed continually for 3 minutes.
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