On-Vehicle Inspection

BRAKE CONTROL: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT BRAKE ACTUATOR ASSEMBLY OPERATION
(a) Pre-check preparation
(1) Move the shift lever to the P position. Apply the parking brake and connect Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn on Techstream. Select "MAS CYL PRS 1", "MAS CYL PRS 2", "FR PRESS SENS", "FL PRESS SENS", "RR PRESS SENS" and "RL PRESS SENS".
(b) Check the FR system solenoids (SLA**, SLR**, SMC1, SMC2).
(1) ->Select "SLAFR CLOSE". 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. Problem Symptoms Table

Standard voltage:






(c) Check the FL system solenoids (SLA**, SLR**, SMC1, SMC2).
(1) ->Select "SLAFL CLOSE". 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. Problem Symptoms Table

Standard voltage:






(d) Check the RR system solenoids (SLA**, SLR**, SMC1, SMC2).
(1) ->Select "SLARR CLOSE". 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. Problem Symptoms Table

Standard voltage:






(e) Check the RL system solenoids (SLA**, SLR**, SMC1, SMC2).
(1) ->Select "SLAFL CLOSE". 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. Problem Symptoms Table

Standard voltage:






(f) Check SMC1 and SMC2.
(1) Select "ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID" on 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 brake pedal.
Standard voltage:
Difference in the output voltage between "MAS CYL PRS 1" and "FR PRESS SENS" is less than 0.4 V.
Standard Voltage:
Difference in the output voltage between "MAS CYL PRS 2" and "FL PRESS SENS" is less than 0.4 V.
(4) Press the return key on Techstream and cancel brake control prohibition (ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID).
2. INSPECT PRESSURE SENSOR OPERATION
(a) Check the battery voltage.
Standard voltage:
10 to 14 V (when the engine is not running and the power switch is off)
(b) Connect the LSPV pressure gauge (SST) 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 Techstream to the DLC3 with the parking brake applied.
(4) Turn the power switch on (IG).
(5) Clear the DTCs.
(c) Check the wheel cylinder pressure sensor and master pressure sensor.
(1) Turn on Techstream. Select "MAS CYL PRS 1", "MAS CYL PRS 2", "FR PRESS SENS", "FL PRESS SENS", "RR PRESS SENS", and "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. Problem Symptoms Table
Standard voltage:






Standard voltage:






Standard voltage:






Standard voltage:






Standard voltage:






(d) Check the accumulator (ACC) pressure sensor.
(1) Move the shift lever to the P position. Apply the parking brake and connect Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn on Techstream. Select the accumulator (ACC) pressure sensor 1 (ACC PRESS SENS) in the data list.
(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. Problem Symptoms Table