Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection
BRAKE ACTUATOR ASSYON-VEHICLE INSPECTION
1. INSPECT BRAKE ACTUATOR OPERATION
a) Pre-check preparation
1) Move the shift lever to the P position. Apply the parking brake and connect the hand-held tester to the DLC3.
2) Turn the power switch on (IG).
3) Turn on the hand-held tester. Select "MAS CYL PRS 1", "MAS CYL PRS2", "FR PRESS SENS", "FL PRESS SENS", "RR PRESS SENS" and "RL PRESS SENS".
b) Check FR system solenoid (SLA**, SLR**, SMC1, SMC2)
1) Select "SLAFR CUR". - Set the current to 1.2 A - Enter and check the output voltage.
NOTICE: Do not depress the brake pedal.
HINT:
^ It takes approximately 35 seconds to complete the check.
^ If incorrect, troubleshoot the brake system.
Standard Value
c) Check FL system solenoid (SLA**, SLR**, SMC1, SMC2)
1) Select "SLAFL CUR". - Set the current to 1.2 A. - Enter and check the output voltage.
NOTICE: Do not depress the brake pedal.
HINT:
^ It takes approximately 35 seconds to complete the check.
^ If incorrect, troubleshoot the brake system.
Standard value
d) Check RR system solenoid (SLA**, SLR**, SMC1, SMC2)
1) Select "SLARR CUR". - Set the current to 1.2 A. - Enter and check the output voltage.
NOTICE: Do not depress the brake pedal.
HINT:
^ It takes approximately 35 seconds to complete the check.
^ If incorrect, troubleshoot the brake system.
Standard Value
e) Check RL system solenoid (SLA**, SLR**, SMC1, SMC2)
1) Select "SLARL CUR". - Set the current to 1.2 A. - Enter and check the output voltage.
NOTICE: Do not depress the brake pedal.
HINT:
^ It takes approximately 35 seconds to complete the check.
^ If incorrect, troubleshoot the brake system.
Standard Value
f) Check SMC1, SMC2
1) Select and enter "ECB INVALID" to prohibit the brake control (ECB) on the hand-held tester menu screen.
2) Check that the ECB warning light comes on.
3) Check the output voltage by depressing the pedal.
Standard:
Difference in output voltage between "MAS CYL PRS 1" and "FR PRESS SENS" is less than 0.4 Volts.
Difference in the output voltage between "MAS CYL PRS 2" and "FL PRESS SENS" is less than 0.4Volts.
4) Enter the return key on the hand-held tester and cancel brake control prohibition (ECB INVALID).
2. INSPECT PRESSURE SENSOR OPERATION
a) Check battery voltage
Standard Value: 10 to 14 Volts (during engine stop)
b) Connect the hydro booster pressure gauge and pedal effort gauge.
1) Install LSPV gauge (SST) and brake pedal effort gauge.
SST 09709-29018
2) Bleed the air out of the hydro booster pressure gauge.
3) Move the shift lever to the P position. Connect the hand-held tester to the DLC3 with the parking brake applied.
4) Turn the power switch on (IG).
5) Clear the DTC.
c) Check wheel cylinder pressure sensor and master pressure sensor.
1) Turn on the hand-held tester. Select and enter "MAS CYLPRS1", "MAS CYLPRS2","FR PRESS SENS","FL PRESS SENS","RR PRESS SENS" and "RL PRESS SENS" into the data monitor.
2) Check the brake effort, pressure gauge reading, and output pressure voltage.
If incorrect, troubleshoot the brake system.
Standard Value
d) Check accumulator (ACC) pressure sensor
1) Move the shift lever to the P position. Apply the parking brake and connect the hand-held tester.
2) Turn the power switch on (IG).
3) Turn on the hand-held tester. Select and enter the accumulator (ACC) pressure sensor 1 ("ACC PRESS SEWS") into the data monitor.
4) Temporarily operate the pump motor by depressing the brake pedal 4 to 5 times.
5) After confirming that the pump motor stops, check the pressure output voltage.
If incorrect, troubleshoot the brake system.
Standard Value: 2.6 to 3.8 Volts