LS 460 AWD V8-4.6L (1UR-FSE) (2009)
Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:
4. Press the "Engine Start/Stop" button to the ignition ON position and perform brake bleed starting with Section 2 of TSIB L-SB-0069-09.
"Squawk/Bark Type Noise from Brake Actuator".
5. Road test the vehicle to verify proper brake operation and that the noise has been eliminated.