Page 545 of 3115
F04478Pin
F04503
SST
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-63
2199 Author: Date:
2004 LAND CRUISER (RM1071U)
8. REMOVE PISTON
(a) Pressing the piston in with a screwdriver, use a pin or an
equivalent to push the snap ring from the hole in the body
then remove it with another screwdriver.
(b) Remove the piston, pulling straight out, not at an angle.
NOTICE:
If pulled out and installed at an angle, there is a possi-
bility that the cylinder bore could be damaged.
At the time of reassembly, be careful not to damage
the rubber lips on the pistons.
9. REMOVE ACCUMULATOR FROM BOOSTER PUMP
(a) Using SST, remove the accumulator.
SST 09318-12010
Torque: 54 N´m (550 kgf´cm, 36 ft´lbf)
(b) Remove the silencer tube, spring and O-ring.
Page 546 of 3115
BR0TH-09
F04504
BA
A: 20 mm (0.791 in.)
B: 30 mm (1.18 in.)
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-65
2201 Author: Date:
2004 LAND CRUISER (RM1071U)
DISPOSAL
DISPOSAL METHOD OF ACCUMULATOR
(a) Place the accumulator in a vise, cover it with a cloth over.
(b) Using a saw, then cut the accumulator body slowly.
CAUTION:
Do not cut at a place except a stretch.
(c) When the outer body of the accumulator is cut, gas dis-
charges.
Page 547 of 3115
BR120-08
F06051
1
2 BR-64
- BRAKEHYDRAULIC BRAKE BOOSTER
2200 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION
INSPECT HYDRAULIC BRAKE BOOSTER PUMP MOTOR
OPERATION
(a) Connct the positive (+) lead from the battery to terminal
1 of pump motor, and the negative (-) lead to terminal 2.
(b) Check that the pump motor operation.
Page 548 of 3115
BR0KD-04
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-67
2203 Author: Date:
2004 LAND CRUISER (RM1071U)
INSTALLATION
Installation is in the reverse order of removal (See page BR-60).
HINT:
After installation, fill the brake reservoir with brake fluid and bleed brake system (See page BR-4).
Check for leaks.
Page 549 of 3115

F04470
Brake Pedal Effort Gauge
SST
SST
BR12B-07
BR-40
- BRAKEHYDRAULIC BRAKE BOOSTER
2176 Author: Date:
2004 LAND CRUISER (RM1071U)
HYDRAULIC BRAKE BOOSTER
ON-VEHICLE INSPECTION
1. CHECK HYDRAULIC BRAKE BOOSTER FLUID PRES-
SURE CHANGE
(a) Inspect the battery positive voltage.
Battery positive voltage: 10 - 14 V
(b) Turn the ignition switch OFF, depress the brake pedal
more than 40 times.
HINT:
When a pressure in power supply system is released, reaction
force becomes light and stroke becomes longer.
(c) Install LSPV gauge (SST) and brake pedal effort gauge,
bleed air.
SST 09709-29018
(d) When booster does not operate:
Depress the brake pedal and check fluid pressure.
At 245 N (25 kgf, 55 lbf):
Front brake pressureRear brake pressure
2,700 kPa (27.5 kgf/cm2, 391 psi)
or more0 kPa (0 kgf/cm2, 0 psi)
At 343 N (35 kgf, 77 lbf):
Front brake pressureRear brake pressure
3,950 kPa (40 kgf/cm2, 568 psi)
or more0 kPa (0 kgf/cm2, 0 psi)
(e) w/ ABS only, when booster operate:
(1) Turn the ignition switch ON and wait until the pump
motor has stopped.
(2) Depress the brake pedal and check fluid pressure.
At 49 N (5 kgf, 11 lbf):
Front brake pressureRear brake pressure
1,618 - 2,795kPa
(16.5 - 28.5 kgf/cm2, 234 - 405 psi)
1,716 - 2,893 kPa
(17.5 - 29.5 kgf/cm2, 249 - 419 psi)
At 98 N (10 kgf, 22 lbf):
Front brake pressureRear brake pressure
4,413 - 5,624 kPa
(45 - 57 kgf/cm2, 639 - 809 psi)
3,187 - 4,364 kPa
(32.5 - 44.5 kgf/cm2, 462 - 632 psi)
At 147 N (15 kgf, 33 lbf):
Front brake pressureRear brake pressure
7,208 - 8,436 kPa
(73.5 - 85.5 kgf/cm2, 1,043 - 1,214 psi)
4,609 - 5,786 kPa
(47 - 59 kgf/cm2, 667 - 838 psi)
At 196 N (20 kgf, 44 lbf):
Front brake pressureRear brake pressure
9,905 - 11,082 kPa
(101 - 113 kgf/cm2, 1,434 - 1,604 psi)
6,031 - 7,208 kPa
(61.5 - 73.5 kgf/cm2, 873 - 1,044 psi)
Page 550 of 3115

I24672
TOYOTA Hand-held Tester
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-41
2177 Author: Date:
2004 LAND CRUISER (RM1071U)
(f) w/ ABS & TRAC & VSC ECU only, when booster operate:
(1) Turn the ignition switch ON and wait until the pump
motor has stopped.
(2) Depress the brake pedal and check fluid pressure.
At 49 N (5 kgf, 11 lbf):
Front brake pressureRear brake pressure
1,618 - 2,795kPa
(16.5 - 28.5 kgf/cm2, 234 - 405 psi)
1,716 - 2,893 kPa
(17.5 - 29.5 kgf/cm2, 249 - 419 psi)
At 98 N (10 kgf, 22 lbf):
Front brake pressureRear brake pressure
4,413 - 5,624 kPa
(45 - 57 kgf/cm2, 639 - 809 psi)
4,609 - 5,786 kPa
(47 - 59 kgf/cm2, 668 - 839 psi)
At 147 N (15 kgf, 33 lbf):
Front brake pressureRear brake pressure
7,208 - 8,436 kPa
(73.5 - 85.5 kgf/cm2, 1,043 - 1,214 psi)
7,502 - 8,679 kPa
(76.5 - 88.5 kgf/cm2, 1,088 - 1,259 psi)
At 196 N (20 kgf, 44 lbf):
Front brake pressureRear brake pressure
9,905 - 11,082 kPa
(101 - 113 kgf/cm2, 1,434 - 1,604 psi)
10,346 - 11,523 kPa
(105.5 - 117.5 kgf/cm2,
1,501 - 1,671 psi)
2. w/ ABS only,
In case of using TOYOTA hand-held tester:
INSPECT HYDRAULIC BRAKE BOOSTER OPERA-
TION
(a) Inspect the battery positive voltage.
Battery positive voltage: 10 - 14 V
(b) Turn the ignition switch OFF, depress the brake pedal
more than 40 times.
HINT:
When a pressure in power supply system is released, reaction
force becomes light and stroke becomes longer.
(c) Turn the ignition switch ON, check the pump motor opera-
tion noise.
If the pump motor does not operate, check and replace the wire
harness and pump motor (See page BR-64).
(d) Connect the TOYOTA hand-held tester.
(1) Connect the TOYOTA hand- held tester to the
DLC3.
(2) Turn the ignition switch ON.
(3) Select the ºACTIVE TESTº mode on the TOYOTA
hand-held tester.
HINT:
Please refer to the TOYOTA hand-held tester operator's
manual for further details.
Page 551 of 3115

BR-42
- BRAKEHYDRAULIC BRAKE BOOSTER
2178 Author: Date:
2004 LAND CRUISER (RM1071U)
To protect the solenoids, TOYOTA hand-held tester turns
OFF automatically for 2 sec. after every solenoid has
been turned ON.
(e) Inspect the front ABS switching solenoid operation.
(1) Select ºSA1º and ºSA2º on the TOYOTA hand-held
tester.
(2) With ºSA1º and ºSA2º turned ON simultaneously
with the TOYOTA hand-held tester, depress the
brake pedal with stable force and check that the
pedal cannot be depressed.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns OFF
automatically for 2 sec. after every solenoid has been turned
ON.
If the pedal can be depressed, replace the hydraulic brake
booster.
NOTICE:
When operating it continuously, set the interval of more
than 20 sec.
(3) Once, release the brake pedal.
(4) When the solenoids are OFF, after depressing the
brake pedal again and check that the brake pedal
can be depressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(f) Inspect the front ABS solenoid operation.
(1) Select ºSFRHº and ºSFLHº on the TOYOTA hand-
held tester.
(2) With ºSFRHº and ºSFLHº turned ON simultaneously
with the TOYOTA hand-held tester, depress the
brake pedal with stable force and check that the
brake pedal cannot be depressed.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns OFF
automatically for 2 sec. after every solenoid has been turned
ON.
If the pedal can be depressed, replace the hydraulic brake
booster.
(3) Once, release the brake pedal when the solenoids
are OFF, check that the brake pedal can be de-
pressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(4) Once, release the brake pedal. After depressing
and holding the brake pedal with stable force, turn
the SFRH and SFRR solenoids ON simultaneously.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns OFF
automatically for 2 sec. after every solenoid has been turned
ON.
Page 552 of 3115

- BRAKEHYDRAULIC BRAKE BOOSTER
BR-43
2179 Author: Date:
2004 LAND CRUISER (RM1071U)
(5) When the solenoids are OFF, check that the brake
pedal can be depressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(6) Once, release the brake pedal. After depressing
and holding the brake pedal with stable force, turn
the SFLH and SFLR solenoids ON simultaneously.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns OFF
automatically for 2 sec. after every solenoid has been turned
ON.
(7) Once release the brake pedal when the solenoids
are OFF, check that the brake pedal can be de-
pressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(g) Jack up and support the vehicle.
(h) Release the parking brake lever.
(i) Inspect the rear ABS solenoid.
(1) Select the ºSRHº on the TOYOTA hand-held tester.
(2) Turn the ºSRHº ON with the TOYOTA hand-held
tester and depress the brake pedal with stable
force, and rotate the right rear wheel by hand and
check it.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns
OFF automatically for 2 sec. after every solenoid has
been turned ON.
When rotating the wheel fast, the fail-safe function is acti-
vated and judgement cannot be made properly. So rotate
the wheel as slowly as possible.
When solenoid is OFF, the wheel might stop temporarily.
However if the wheel rotates again, the function works
normally.
If the rear wheels stop, replace the hydraulic brake booster.
(3) Once, release the brake pedal and turn the ºSRHº
OFF, after depressing the brake pedal with stable
force and stop the rear right wheel by hand and
check it.
If the rear wheel rotate, replace the hydraulic brake booster.
(4) Depress the pedal with stable force, then turn the
ºSRHº and ºSRRº ON simultaneously.
(5) When the solenoids are ON, rotate the rear wheel
by hand and check it.
HINT:
To protect the solenoids, TOYOTA hand-held tester turns
OFF automatically for 2 sec. after every solenoid has
been turned ON.