Hydraulic Control Assembly - Antilock Brakes: Testing and Inspection

BRAKE CONTROL: BRAKE ACTUATOR: ON-VEHICLE INSPECTION

ON-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 Techstream to the DLC3.
(2) Turn the power switch ON (IG).
(3) Turn on the Techstream. Select "Master Cylinder Sensor", "Master Cylinder Sensor 2", "FR W/C Sensors", "FL W/C Sensor", "RR W/C Sensor" and "RL W/C Sensor".
(b) Check FR system solenoid (SLA**, SLR**, SMC1, SMC2)
(1) Select "SLAFR CUR". Set the current to 1.2 A. 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 Problem Symptoms Table.
Standard output voltage:






(c) Check FL system solenoid (SLA**, SLR**, SMC1, SMC2)
(1) Select "SLAFL CUR". Set the current to 1.2 A. 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 Problem Symptoms Table.
Standard output voltage:






(d) Check RR system solenoid (SLA**, SLR**, SMC1, SMC2)
(1) Select "SLARR CUR". Set the current to 1.2 A. 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 Problem Symptoms Table.
Standard output voltage:






(e) Check RL system solenoid (SLA**, SLR**, SMC1, SMC2)
(1) Select "SLARL CUR". Set the current to 1.2 A. 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 Problem Symptoms Table.
Standard output voltage:






(f) Check SMC1, SMC2
(1) Select and enter "ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID" to prohibit the brake control (ELECTRONICALLY CONTROLLED BRAKE SYSTEM) on the Techstream menu screen.
(2) Check that the ELECTRONICALLY CONTROLLED BRAKE SYSTEM warning light comes on.
(3) Check the output voltage by depressing the brake pedal.
Standard difference in output voltage:





(4) Press the return key on the Techstream and cancel brake control prohibition (ELECTRONICALLY CONTROLLED BRAKE SYSTEM INVALID).
2. INSPECT PRESSURE SENSOR OPERATION
(a) Check battery voltage.
Standard battery voltage:
10 to 14 V (during engine stop)
(b) Connect the hydro booster pressure gauge and pedal effort gauge.




(1) Install the 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 Techstream to the DLC3 with the parking brake applied.
(4) Turn the power switch ON (IG).
(5) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.
(c) Check 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 effort, pressure gauge reading, and output pressure voltage.
If incorrect, troubleshoot the brake system Problem Symptoms Table.
Standard output voltage:






















(d) Check accumulator Sensor.
(1) Move the shift lever to the P position. Apply the parking brake and connect the Techstream.
(2) Turn the power switch ON (IG).
(3) Turn on the Techstream. Select and enter the Accumulator Sensor.
(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 Problem Symptoms Table.
Standard output voltage:
2.6 to 3.8 V