LS 460 V8-4.6L (1UR-FSE) (2007)
Hydraulic Control Assembly - Antilock Brakes: Service and Repair
Removal and Installation
REMOVAL
NOTE: While the battery is connected, even if the engine switch is off, the brake control system activates when the brake pedal is depressed or the door
courtesy switch turns on. Therefore during servicing of the brake system components, do not operate the brake pedal and open/ close the doors while the
battery is connected.
1. REMOVE V-BANK COVER SUB-ASSEMBLY
2. REMOVE COWL TOP VENTILATOR LOUVER RH
3. REMOVE FRONT WIPER ARM LH
4. REMOVE FRONT WIPER ARM RH
5. REMOVE ENGINE ROOM SIDE COVER LH
6. REMOVE ENGINE ROOM SIDE COVER RH
7. REMOVE FRONT FENDER PROTECTOR UPPER LH
8. REMOVE FRONT FENDER PROTECTOR UPPER RH
9. REMOVE HOOD TO COWL TOP SEAL
10. REMOVE FRONT FENDER TO COWL SIDE SEAL LH
11. REMOVE FRONT FENDER TO COWL SIDE SEAL RH
12. REMOVE COWL TOP VENTILATOR LOUVER PROTECTOR LH
13. REMOVE COWL TOP VENTILATOR LOUVER SUB-ASSEMBLY
14. PERFORM ACCUMULATOR PRESSURE ZERO DOWN
CAUTION: Be sure to perform this procedure before removing the brake actuator and brake accumulator pump.
a. Connect the intelligent tester or Techstream to the DLC3 with the engine switch off.
b. Turn the engine switch on (IG).
c. Turn the intelligent tester or Techstream ON and perform accumulator zero down by following the prompts displayed on the intelligent tester
or Techstream.
HINT: Select "DIAGNOSTIC MENU"->"ABS/VSC"->"ELECTRONICALLY CONTROLLED BRAKE SYSTEM UTILITY"->"ZERO
DOWN" on the intelligent tester or Techstream.
d. When the buzzer sounds, turn the engine switch off.
NOTE: Do not push the engine switch on (IG). If the engine switch is pushed on (IG), the brake accumulator pump operates so that the brake
accumulator is accumulated with brake fluid.
15. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt
pretensioner activation.
NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory
and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery
terminal.
16. DRAIN BRAKE FLUID
NOTE: If brake fluid leaks onto any painted surface, wash or remove it completely.
17. REMOVE SKID CONTROL ECU
18. REMOVE SKID CONTROL ECU BRACKET
19. DISCONNECT ENGINE ROOM NO. 3 RELAY BLOCK