LS 460 AWD V8-4.6L (1UR-FSE) (2009)
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Brake Master Cylinder: Testing and Inspection
On-Vehicle Inspection
BRAKE: BRAKE MASTER CYLINDER: ON-VEHICLE INSPECTION
ON-VEHICLE INSPECTION
NOTE:
A DTC may be stored during the inspection procedure. Be sure to clear the DTC and check that a normal system code is output after the
inspection is finished.
1. CHECK BRAKE MASTER CYLINDER
(a) Check battery voltage.
Standard value:
11 to 14 V (while the engine switch is off)
(b) Connect the Techstream and pedal effort gauge.
(1) Connect the pedal effort gauge.
(2) Move the shift lever to the P position. Apply the parking brake and connect the Techstream to the DLC3.
(3) Turn the engine switch on (IG).
(4) Clear the DTCs See: Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.
(c) Check operation without brake booster.
(1) Check and adjust the brake pedal height See: Brake Pedal Assy/Adjustments.
(2) Check and adjust the brake pedal stroke sensor See: Brake Pedal Assy/Adjustments.
(3) Check the brake pedal free play See: Brake Pedal Assy/Adjustments.
(4) Check the brake pedal reserve distance See: Brake Pedal Assy/Adjustments.
(5) Select and enter "Electronically Controlled Brake system Invalid" to prohibit the brake control.
(6) Monitor "Voltage of Master Cylinder Sensor", "Voltage of Master Cylinder Sensor 2", "Stroke Sensor" and "Stroke Sensor 2" using the
Techstream.
(7) Check the value output from "Voltage of Master Cylinder Sensor", "Voltage of Master Cylinder Sensor 2", "Stroke Sensor" and "Stroke
Sensor 2" by depressing the brake pedal.
Standard voltage:
(8) Finish the brake control prohibition on the Techstream.
2. CHECK STROKE SIMULATOR
(a) Check battery voltage.
Standard value:
11 to 14 V (while the engine switch is off)
(b) Connect the Techstream and pedal effort gauge.
(1) Connect the pedal effort gauge.
(2) Move the shift lever to the P position. Apply the parking brake and connect the Techstream to the DLC3.
(3) Turn the engine switch on (IG).
(4) Clear the DTCs See: Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.
(c) Check operation without brake booster.
(1) Check and adjust the brake pedal height See: Brake Pedal Assy/Adjustments.
(2) Check and adjust the brake pedal stroke sensor See: Brake Pedal Assy/Adjustments.
(3) Check the brake pedal free play See: Brake Pedal Assy/Adjustments.
(4) Check the brake pedal reserve distance See: Brake Pedal Assy/Adjustments.
(5) Select and enter "Electronically Controlled Brake system Invalid" to prohibit the brake control.
(6) Monitor "Voltage of Master Cylinder Sensor", "Voltage of Master Cylinder Sensor 2", "Stroke Sensor" and "Stroke Sensor 2" using the
Techstream.
(7) Check the value output from "Voltage of Master Cylinder Sensor", "Voltage of Master Cylinder Sensor 2", "Stroke Sensor" and "Stroke
Sensor 2" by depressing the brake pedal.
Standard voltage:
