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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Electronically Controlled Brake System (HV) - Diagnostic Codes (10 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC P057A-00: Brake Pedal Position Sensor "A"; DTC P05E0-62: Brake Pedal Position Sensor "A"/"B" Signal Compare Failure [12/2019 - 10/2021] >> Procedure

DTC P057A-00: Brake Pedal Position Sensor "A"; DTC P05E0-62: Brake Pedal Position Sensor "A"/"B" Signal Compare Failure [12/2019 - 10/2021]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING GTS (BRAKE PEDAL STROKE SENSOR ASSEMBLY) 
    1. Mount a pedal effort gauge.
    2. Turn the ignition switch to ON (READY) and depress the brake pedal once.

      HINT: 

      Depress the brake pedal after turning the ignition switch to ON (READY) to set the vehicle to linear mode (switching solenoid (SSA) on).

    3. Depress the brake pedal slowly and check the brake pedal stroke sensor assembly output voltages with respect to brake pedal depression force.

      Chassis > Brake Booster > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stroke Sensor Brake pedal stroke sensor 1 Min.: 0.0 V
      Max.: 5.0 V      		 Brake pedal released: 0.6 to 1.4 V Reading increases when brake pedal is depressed

      Chassis > Brake Booster > Data List 

      Tester Display
      Stroke Sensor

      Chassis > Brake/EPB > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stroke Sensor2 Brake pedal stroke sensor 2 Min.: 0.0 V
      Max.: 5.0 V      		 Brake pedal released: 3.6 to 4.4 V Reading decreases when brake pedal is depressed

      Chassis > Brake/EPB > Data List 

      Tester Display
      Stroke Sensor2

      HINT: 

      Perform this procedure in linear mode (switching solenoid (SSA) on).

      Standard Voltage

      Brake Effort
      [N (kgf, lbf)]      		 Stroke Sensor
      [V]      		 Stroke Sensor2
      [V]
      50 (5, 11.2) 1.20 to 1.90 3.10 to 3.80
      100 (10, 22.5) 1.42 to 2.16 2.88 to 3.58
      150 (15, 33.7) 1.61 to 2.31 2.69 to 3.39

      Result

      Result Proceed to
      OK A
      NG (brake pedal stroke sensor 1) B
      NG (brake pedal stroke sensor 2) C

    Result: 

    A 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

    Result: 

    C 

    See step  3

    Result: 

    B 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE PEDAL STROKE SENSOR ASSEMBLY) 
    1. Turn the ignition switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A44 No. 1 skid control ECU (brake booster with master cylinder assembly) connector.
    4. Disconnect the A43 brake pedal stroke sensor assembly connector.
    5. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A44-3 (SKS1) - A43-6 (SKS1) Always Below 1 Ω
      A44-3 (SKS1) or A43-6 (SKS1) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - BRAKE PEDAL STROKE SENSOR ASSEMBLY) 
    1. Turn the ignition switch off.
    2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

      OK

      The connector is securely connected.

    3. Disconnect the A57 No. 2 skid control ECU (brake actuator assembly) connector.
    4. Disconnect the A43 brake pedal stroke sensor assembly connector.
    5. Check both the connector case and the terminals for deformation and corrosion.

      OK

      No deformation or corrosion.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A57-10 (SKS2) - A43-1 (SKS2) Always Below 1 Ω
      A57-10 (SKS2) or A43-1 (SKS2) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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