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On-Vehicle Inspection

  1. INSPECT BRAKE ACTUATOR ASSEMBLY OPERATION 
    1. Pre-check preparation
      1. Move the shift lever to the P position. Apply the parking brake and connect the Techstream to the DLC3.
      2. Turn the ignition switch to the ON position.
      3. Turn on the Techstream. Select "Master Cylinder Sensor", "Master Cylinder Sensor 2", "FR W/C Sensor S", "FL W/C Sensor", "RR W/C Sensor" and "RL W/C Sensor".
    2. Check FR system solenoids (SLA**, SLR**, SMC1, SMC2).
      1. Select "SLAFR CUR". → Enter and check the output voltage.
        NOTE: Do not depress the brake pedal.

        HINT:

        • It takes approximately 35 seconds to complete the check.
        • If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

        Standard voltage: 

        VOLTAGE SPECIFICATION CHART

        Sensor 10 to 20 sec. after check start (V) 35 sec. or more after check start (V)
        Master Cylinder Sensor 0.3 to 0.7 0.3 to 0.7
        Master Cylinder Sensor 2 0.3 to 0.7 0.3 to 0.7
        FR W/C Sensor 2.5 to 4.5 0.3 to 0.7
        FL W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RL W/C Sensor 0.3 to 0.7 0.3 to 0.7
    3. Check FL system solenoids (SLA**, SLR**, SMC1, SMC2).
      1. Select "SLAFL CUR". → Enter and check the output voltage.
        NOTE: Do not depress the brake pedal.

        HINT:

        • It takes approximately 35 seconds to complete the check.
        • If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

        Standard voltage: 

        VOLTAGE SPECIFICATION CHART

        Sensor 10 to 20 sec. after check start (V) 35 sec. or more after check start (V)
        Master Cylinder Sensor 0.3 to 0.7 0.3 to 0.7
        Master Cylinder Sensor 2 0.3 to 0.7 0.3 to 0.7
        FR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        FL W/C Sensor 2.5 to 4.5 0.3 to 0.7
        RR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RL W/C Sensor 0.3 to 0.7 0.3 to 0.7
    4. Check RR system solenoids (SLA**, SLR**, SMC1, SMC2).
      1. Select "SLARR CUR". → Enter and check the output voltage.
        NOTE: Do not depress the brake pedal.

        HINT:

        • It takes approximately 35 seconds to complete the check.
        • If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

        Standard voltage: 

        VOLTAGE SPECIFICATION CHART

        Sensor 10 to 20 sec. after check start (V) 35 sec. or more after check start (V)
        Master Cylinder Sensor 0.3 to 0.7 0.3 to 0.7
        Master Cylinder Sensor 2 0.3 to 0.7 0.3 to 0.7
        FR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        FL W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RR W/C Sensor 2.5 to 4.5 0.3 to 0.7
        RL W/C Sensor 0.3 to 0.7 0.3 to 0.7
    5. Check RL system solenoids (SLA**, SLR**, SMC1, SMC2).
      1. Select "SLAFL CUR". → Enter and check the output voltage.
        NOTE: Do not depress the brake pedal.

        HINT:

        • It takes approximately 35 seconds to complete the check.
        • If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

        Standard voltage: 

        VOLTAGE SPECIFICATION CHART

        Sensor 10 to 20 sec. after check start (V) 35 sec. or more after check start (V)
        Master Cylinder Sensor 0.3 to 0.7 0.3 to 0.7
        Master Cylinder Sensor 2 0.3 to 0.7 0.3 to 0.7
        FR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        FL W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RR W/C Sensor 0.3 to 0.7 0.3 to 0.7
        RL W/C Sensor 2.5 to 4.5 0.3 to 0.7
    6. Check SMC1 and SMC2.
      1. Select and enter "ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID" on the Techstream menu screen to prohibit the brake control.
      2. Check that the brake control warning light comes on.
      3. Check the output voltage by depressing the pedal.

        Standard Voltage: 

        Difference in the output voltage between "Master Cylinder Sensor" and "FR W/C Sensor" is less than 0.4 V. 

        Standard Voltage: 

        Difference in the output voltage between "Master Cylinder Sensor 2" and "FL W/C Sensor" is less than 0.4 V. 

      4. Enter the return key on the Techstream and cancel brake control prohibition (ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID).
  2. INSPECT PRESSURE SENSOR OPERATION 
    1. Check the battery voltage

      Standard voltage: 

      10 to 14 V (during engine stop) 

    2. Connect the hydro booster pressure gauge and pedal effort gauge.
      1. Install the hydro LSPV gauge (SST) and brake pedal effort gauge.

        SST 09709-29018 

      2. Bleed the air from the hydro booster pressure gauge.
      3. Move the shift lever to the P position. Connect the Techstream to the DLC3 with the parking brake applied.
      4. Turn the ignition switch to the ON position.
      5. Clear the DTC.
      Fig 1: Checking Wheel Cylinder Pressure Sensor And Master Pressure Sensor
      G05276946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Check the wheel cylinder pressure sensor and master pressure sensor.
      1. Turn on the Techstream. Select "Master Cylinder Sensor", "Master Cylinder Sensor 2", "FR W/C Sensor", "FL W/C Sensor", "RR W/C Sensor" and "RL W/C Sensor".
      2. Check the brake pedal effort gauge, hydro booster pressure gauge reading, and output pressure voltage. If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

        Standard voltage: 

        VOLTAGE SPECIFICATION CHART

        Brake effort N (kgf, lbf) Master Cylinder Sensor (V) Master Cylinder Sensor 2 (V)
        200 (20.4, 45) 0.85 to 1.15 0.85 to 1.15
        500 (51,112) 1.85 to 2.15 1.85 to 2.15
        VOLTAGE SPECIFICATION CHART

        Brake effort N (kgf, lbf) Front right wheel hydraulic pressure MPa (kgf/cm2 , psi) FR W/C Sensor (V)
        50 (5.1,11) 2.6 (26.5, 377) 0.85 to 1.15
        100 (10.2,22) 6.3 (64.3, 914) 1.6 to 1.9
        150 (15.3,34) 8.1 (82.6, 1175) 1.95 to 2.25
        200 (20.4, 45) 8.2 (83.6, 1189) 2.0 to 2.3
        VOLTAGE SPECIFICATION CHART

        Brake effort N (kgf, lbf) Front left wheel hydraulic pressure MPa (kgf/cm2 , psi) FL W/C Sensor (V)
        50 (5.1,11) 2.6 (26.5, 377) 0.85 to 1.15
        100 (10.2,22) 6.3 (64.3, 914) 1.6 to 1.9
        150 (15.3, 34) 8.1 (82.6, 1175) 1.95 to 2.25
        200 (20.4, 45) 8.2 (83.6, 1189) 2.0 to 2.3
        VOLTAGE SPECIFICATION CHART

        Brake effort N (kgf, lbf) Rear right wheel hydraulic pressure MPa (kgf/cm2 , psi) RR W/C Sensor (V)
        50 (5.1,11) 2.7 (27.5, 392) 0.85 to 1.15
        100 (10.2, 22) 5.0 (51.0,725) 1.35 to 1.65
        150 (15.3,34) 5.0 (51.0,725) 1.35 to 1.65
        200 (20.4, 45) 5.0 (51.0,725) 1.35 to 1.65
        VOLTAGE SPECIFICATION CHART

        Brake effort N (kgf, lbf) Rear left wheel hydraulic pressure MPa (kgf/cm2 , psi) RL W/C Sensor (V)
        50 (5.1, 11) 2.7 (27.5, 392) 0.85 to 1.15
        100 (10.2,22) 5.0 (51.0,725) 1.35 to 1.65
        150 (15.3, 34) 5.0 (51.0,725) 1.35 to 1.65
        200 (20.4, 45) 5.0 (51.0,725) 1.35 to 1.65
    4. Check the Accumulator Sensor.
      1. Move the shift lever to the P position. Apply the parking brake and connect the Techstream to the DLC3.
      2. Turn the ignition switch to the ON position.
      3. Turn on the Techstream. Select and enter the Accumulator Sensor into the date monitor.
      4. Temporarily operate the pump motor by depressing the brake pedal 4 or 5 times.
      5. After confirming that the pump motor stops, check the pressure output voltage.

        Standard voltage: 

        2.6 to 3.8 V 

        If incorrect, troubleshoot the brake system. (See PROBLEM SYMPTOMS TABLE )

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