BRAKE ACTUATOR (w/ ECB) > ON-VEHICLE INSPECTION

for Preparation Click here



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 intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn on the intelligent tester. Select "MAS CYL PRS1", "MAS CYL PRS2", "FR PRESS SENS", "FL PRESS SENS" and "RL PRESS SENS".

  1. Check FR system solenoid (SLA**, SLR**, SMC1, SMC2).

    1. Select "SLAFR CUR". →Enter and check the output voltage.

      NOTICE:
      Do not depress the brake pedal.


      HINT:
      1. It takes approximately 35 seconds to complete the check.
      2. If incorrect, troubleshoot the brake system. (Click here)

      Standard voltage: 
      Sensor
      		10 to 20 sec. after check start (V)
      		35 sec. or more after check start (V)
      MAS CYL PRS 1
      		0.3 to 0.7
      		0.3 to 0.7
      MAS CYL PRS 1
      		0.3 to 0.7
      		0.3 to 0.7
      FR PRESS SENS
      		2.5 to 4.5
      		0.3 to 0.7
      FL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7

  1. Check FL system solenoid (SLA**, SLR**, SMC1, SMC2).

    1. Select "SLAFL CUR". → Enter and check the output voltage.

      NOTICE:
      Do not depress the brake pedal.

      HINT:
      1. It takes approximately 35 seconds to complete the check.
      2. If incorrect, troubleshoot the brake system. (Click here)


      Standard voltage: 
      Sensor
      		10 to 20 sec. after check start (V)
      		35 sec. or more after check start (V)
      MAS CYL PRS 1
      		0.3 to 0.7
      		0.3 to 0.7
      MAS CYL PRS 2
      		0.3 to 0.7
      		0.3 to 0.7
      FR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      FL PRESS SENS
      		2.5 to 4.5
      		0.3 to 0.7
      RR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7

  1. Check RR system solenoid (SLA**, SLR**, SMC1, SMC2).

    1. Select "SLARR CUR". → Enter and check the output voltage.

      NOTICE:
      Do not depress the brake pedal.


      HINT:
      1. It takes approximately 35 seconds to complete the check.
      2. If incorrect, troubleshoot the brake system. (Click here)

      Standard voltage: 
      Sensor
      		10 to 20 sec. after check start (V)
      		35 sec. or more after check start (V)
      MAS CYL PRS 1
      		0.3 to 0.7
      		0.3 to 0.7
      MAS CYL PRS 2
      		0.3 to 0.7
      		0.3 to 0.7
      FR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      FL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RR PRESS SENS
      		2.5 to 4.5
      		0.3 to 0.7
      RL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7

  1. Check RL system solenoid (SLA**, SLR**, SMC1, SMC2).

    1. Select "SLAFL CUR". → Enter and check the output voltage.

      NOTICE:
      Do not depress the brake pedal.


      HINT:
      1. It takes approximately 35 seconds to complete the check.
      2. If incorrect, troubleshoot the brake system. (Click here)

      Standard voltage: 
      Sensor
      		10 to 20 sec. after check start (V)
      		35 sec. or more after check start (V)
      MAS CYL PRS 1
      		0.3 to 0.7
      		0.3 to 0.7
      MAS CYL PRS 2
      		0.3 to 0.7
      		0.3 to 0.7
      FR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      FL PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RR PRESS SENS
      		0.3 to 0.7
      		0.3 to 0.7
      RL PRESS SENS
      		2.5 to 4.5
      		0.3 to 0.7

  1. Check SMC1, SMC2.

    1. Select and enter "ECB INVALID" to prohibit the brake control (ECB) on the intelligent tester menu screen.

    2. Check that the ECB warning light comes on.

    3. Check the output voltage by depressing the pedal.

      Standard:
      Difference in the output voltage between "MAS CYL PRS 1" and "FR PRESS SENS" is less than 0.4 V.
      Standard:
      Difference in output voltage between "MAS CYL PRS 2" and "FL PRESS SENS" is less than 0.4 V.

    4. Press the return key on the intelligent tester and cancel brake control prohibition (ECB INVALID).



2. INSPECT PRESSURE SENSOR OPERATION

  1. Check the battery voltage.

    Standard voltage:
    10 to 14 V (during engine stop)



  1. Connect the hydro booster pressure gauge and pedal effort gauge.



      C105686E02

    1. Install 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 intelligent tester to the DLC3 with the parking brake applied.

    4. Turn the engine switch on (IG).

    5. Clear the DTC. (Click here)

  1. Check the wheel cylinder pressure sensor and master pressure sensor.

    1. Turn on the intelligent tester. Select "MAS CYL PRS 1", "MAS CYL PRS 2", "FR PRESS SENS", "FL PRESS SENS" and "RR PRESS SENS", "RL PRES SENS".

    2. Check the brake pedal effort gauge, hydro booster pressure gauge reading, and output pressure voltage. If incorrect, troubleshoot the brake system. (Click here)
      Standard voltage: 
      Brake effort N (kgf, lbf)
      		MAS CYL PRS 1 (V)
      		MAS CYL PRS 2 (V)
      200 (20.4, 45)
      		0.80 to 1.10
      		0.80 to 1.10
      500 (51, 112)
      		1.55 to 1.85
      		1.55 to 1.85
      Brake effort N (kgf, lbf)
      		Front right wheel hydraulic pressure MPa (kgf/cm2, psi)
      		FR PRESS SENS (V)
      50 (5.1, 11)
      		3.2 (32.6, 464)
      		1.0 to 1.3
      100 (10.2, 22)
      		7.0 (71.4, 1015)
      		1.75 to 2.05
      150 (15.3, 34)
      		3.2 (32.6, 464)
      		2.05 to 2.35
      200 (20.4, 45)
      		3.2 (32.6, 464)
      		2.05 to 2.35
      Brake effort N (kgf, lbf)
      		Front left wheel hydraulic pressure MPa (kgf/cm2, psi)
      		FL PRESS SENS (V)
      50 (5.1, 11)
      		3.2 (32.6, 464)
      		1.0 to 1.3
      100 (10.2, 22)
      		3.2 (32.6, 464)
      		1.75 to 2.05
      150 (15.3, 34)
      		8.3 (84.6, 1203)
      		2.05 to 2.35
      200 (20.4, 45)
      		8.3 (84.6, 1203)
      		2.05 to 2.35
      Brake effort N (kgf, lbf)
      		Rear right wheel hydraulic pressure MPa (kgf/cm2, psi)
      		RR PRESS SENS (V)
      50 (5.1, 11)
      		3.1 (31.6, 449)
      		1.0 to 1.3
      100 (10.2, 22)
      		4.0 (40.8, 580)
      		1.15 to 1.45
      100 (10.2, 22)
      		4.0 (40.8, 580)
      		1.15 to 1.45
      200 (20.4, 45)
      		4.0 (40.8, 580)
      		1.15 to 1.45
      Brake effort N (kgf, lbf)
      		Rear left wheel hydraulic pressure MPa (kgf/cm2, psi)
      		RL PRESS SENS (V)
      50 (5.1, 11)
      		3.1 (31.6, 449)
      		1.0 to 1.3
      100 (10.2, 22)
      		4.0 (40.8, 580)
      		1.15 to 1.45
      150 (15.3, 34)
      		4.0 (40.8, 580)
      		1.15 to 1.45
      200 (20.4, 45)
      		4.0 (40.8, 580)
      		1.15 to 1.45

  1. Check the accumulator (ACC) pressure sensor.

    1. Move the shift lever to the P position. Apply the parking brake and connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn on the intelligent tester. Select the accumulator (ACC) pressure sensor 1 ("ACC PRESS SENS").

    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. (Click here)