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СИСТЕМА ECD Brake Override System

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DTC Code DTC Name
  Brake Override System
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DESCRIPTION

When the vehicle is being driven with the accelerator pedal depressed, depressing the brake pedal without releasing the accelerator pedal will activate the brake override system to restrict driving torque. The conditions for activating the brake override system as well as the items that are controlled are explained below.

Activation Conditions:
Note:

The vehicle may not enter the brake override system control due to the relation of the accelerator pedal angle and the vehicle's speed.

Items Controlled:
Deactivation Conditions:
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INSPECTION PROCEDURE

Inspection Method

Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if the engine speed decreases to 1000 rpm when the brake pedal is depressed, then the brake override system has been activated.

CAUTION:

When carrying out the inspection, use a place where you are able to carry it out safely and also pay close attention to your surroundings.

Also, when driving, make absolutely sure that all road traffic laws, such as speed limits, are observed.

Tip:

Under normal conditions, the Accelerator Position value changes in response to the Accel Position value. For more information on the numerical values, refer to the Data List (Click here).

Note:

The brake override system restricts driving torque if the brake pedal is depressed when driving with the accelerator pedal depressed. If a customer reports experiencing loss of torque after the accelerator and brake pedals have both been intentionally depressed, explain to the customer that this is not a malfunction, and that the customer should avoid depressing both the accelerator and brake pedals at the same time.

Example: While operating the accelerator pedal, the customer uses their left foot to operate the brake pedal.

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PROCEDURE


  1. Click here

    CHECK DTC OUTPUT


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester on.

    3. Enter the following menus: Utility / All Codes.

    4. Check DTCs.

      Table 1. Result
      Result Proceed to
      No DTC is output A
      DTC is output B

  2. Click here

    READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Stop Light SW.

    4. Check the Data List indication when the brake pedal is depressed and released.

      OK
      Tester Display Condition Specified Condition
      Stop Light SW Brake pedal released OFF
      Brake pedal depressed ON

  3. Click here

    INSPECT BRAKE PEDAL


    1. Inspect and adjust the brake pedal (Click here).

      Tip:

      If the stop light switch turns ON too late, the start of brake override system control may be delayed; if it turns ON too soon, brake override system control may begin too early, so conduct inspection of the brake pedal and stop light switch assembly.


  4. Click here

    READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION SENSOR)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester on.

    3. Enter the following menus: Powertrain / Engine and ECT / Data List / Accel Position.

    4. Read the value displayed on the tester.

      OK
      Tester Display Condition Specified Condition
      Accel Position

      Accelerator Pedal

      Released → Depressed → Released

      		 Values smoothly change following accelerator pedal operation
      Tip:

      For numerical values of Accel Position, refer to the Data List (Click here).


  5. Click here

    READ VALUE USING INTELLIGENT TESTER (VEHICLE SPD)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester on.

    3. Start the engine.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle SPD.

    5. Read the value displayed on the tester.

      Standard
      Tester Display Condition Specified Condition
      Vehicle SPD Vehicle stopped, engine running 0 km/h (0 mph)
      Vehicle running at constant speed between 16.1 to 64.4 km/h (10 to 40 mph) No large fluctuations when driving at a constant speed
      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tip:

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.


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    READ VALUE USING INTELLIGENT TESTER (FR, FL, RR, RL WHEEL SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch ON and turn the tester on.

    3. Start the engine.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Data List / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.

    5. Read the value displayed on the tester.

      Standard
      Tester Display Condition Specified Condition

      FR Wheel Speed

      FL Wheel Speed

      RR Wheel Speed

      RL Wheel Speed

      		 Vehicle stopped, engine running 0 km/h (0 mph)
      Vehicle running at constant speed between 16.1 to 64.4 km/h (10 to 40 mph) No large fluctuations when driving at a constant speed
      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      Tip:

      Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.


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    END

  8. Click here

    INSPECT FRONT OR REAR SPEED SENSOR

  9. Click here

    GO TO Vehicle Speed Sensor Signal Circuit MalfunctionClick here

  10. Click here

    REPLACE ACCELERATOR PEDAL ROD ASSEMBLYClick here

  11. Click here

    REPAIR OR REPLACE BRAKE PEDALClick here

  12. Click here

    INSPECT STOP LIGHT SWITCH ASSEMBLYClick here

  13. Click here

    GO TO DTC CHART