1998 TOYOTA LAND CRUISER brake fluid

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.

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)

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.

F02829
F02831
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-51
2187 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(6) Depress and hold the brake pedal with stable force,
push and hold in MAIN push switch.
NOTICE:
Do not keep the MAIN push switch pushed down for more
than 10 sec. When operating it continuously, set the inter-
val of more than 20 sec.
(7) Check that the brake pedal cannot be depressed.
If the pedal can be depressed, replace the hydraulic brake
booster.
(8) Release the MAIN push switch, and check that the
brake pedal can be depressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(9) Release the brake pedal.
(k) Turn the ignition switch OFF, then reconnect the connec-
tor of sub- wire harness from the one with label of
ºFRONTº to ºREARº.
(l) Place ºSHEET Gº of ºREARº on the actuator checker.
(m) Jack up and support the vehicle.
(n) Start the engine and run it at idle.
(o) Inspect the rear solenoid operation.
(1) Turn the selector switch to ºRHº position.
(2) Depress the brake pedal several times and release
the pedal when the pump begins rotating. Wait until
the pump stops.
(3) Turn the ignition switch OFF.
(4) Depress the brake pedal with a force of 343 N (35
kgf, 77 lbf), record the fluid surface in the reservoir
tank of the hydraulic brake booster.
(5) Press the MAIN push switch for 10 sec., and check
that the fluid surface in the reservoir tank of the hy-
draulic brake booster dose not rise up at this time.
If the fluid surface level rises up, replace the hydraulic brake
booster.
NOTICE:
Do not press MAIN push switch for more than 10 sec. When
operating the switch continuously, do it an interval of more
than 20 sec.
(6) Release the brake pedal and check that brake ped-
al is not hard to depress.
If pedal is hard to depress, replace the hydraulic brake booster.
(7) Start the engine and run it at idle.
(8) Depress the brake pedal.
(9) Release the parking brake lever and shift the shift
lever to ºLº position.
(10) Once, release the brake pedal. After depressing the
brake pedal with stable force, then push and hold
MAIN push switch.

F02829
F02830
F02831
- BRAKEHYDRAULIC BRAKE BOOSTER
BR-55
2191 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(6) Depress and hold the brake pedal with stable force,
push and hold in MAIN push switch.
NOTICE:
Do not keep the MAIN push switch pushed down for more
than 10 sec. When operating it continuously, set the inter-
val of more than 20 sec.
(7) Check that the brake pedal cannot be depressed.
If the pedal can be depressed, replace the hydraulic brake
booster.
(8) Release the MAIN push switch, and check that the
brake pedal can be depressed.
If the pedal cannot be depressed, replace the hydraulic brake
booster.
(9) Release the brake pedal.
(l) Turn the ignition switch OFF, then reconnect the connec-
tor of sub- wire harness from the one with label of
ºFRONTº to ºREARº.
(m) Place ºSHEET Gº of ºREARº on the actuator checker.
(n) Jack up and support the vehicle.
(o) Start the engine and run it at idle.
(p) Inspect the rear TRAC & VSC solenoid.
(1) Release the parking brake lever and shift the shift
lever to ºLº position.
(2) Push and hold the ºSA3º switch and ºSTRº switch
simultaneously.
NOTICE:

Do not keep the ºSTRº switch pushed down for more
than 10 sec.

Do not keep the ºSA3º switch pushed down for more
than 5 sec.

When operating it continuously, set the interval of
more than 20 sec.
(3) Check that the rear wheels stop.
If the rear wheels rotate, replace the hydraulic brake booster.
(4) Release the ºSA3º switch and ºSTRº switch simulta-
neously.
(5) Check that the rear wheels rotate.
If the rear wheels stop, replace the hydraulic brake booster.
(q) Inspect the right rear ABS solenoid.
(1) Turn the selector switch to ºRHº position.
(2) Depress the brake pedal several times and release
the brake pedal when the pump begins rotating.
Wait until the pump stops.
(3) Turn the ignition switch OFF.
(4) Depress the brake pedal with a force of 343 N (35
kgf, 77 lbf), record the fluid surface in the reservoir
tank of the hydraulic brake booster.

F02832
BR-56
- BRAKEHYDRAULIC BRAKE BOOSTER
2192 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(5) Press the MAIN push switch for 10 sec., and check
that the fluid surface in the reservoir tank of the hy-
draulic brake booster does not rise up at this time.
If the fluid surface level rises up, replace the hydraulic brake
booster.
NOTICE:
Do not press MAIN push switch for more than 10 sec. When
operating the switch continuously, do it an interval of more
than 20 sec.
(6) Start the engine and run it at idle.
(7) Depress the brake pedal.
(8) Release the parking brake lever and shift the shift
lever to ºLº position.
(9) Once, release the brake pedal. After depressing the
brake pedal with stable force, then push and hold
MAIN push switch.
(10) Check that the right rear wheel rotates.
If the right rear wheel stops, replace the hydraulic brake boost-
er.
(r) Inspect the left rear ABS solenoid.
(1) Turn the selector switch to ºLHº position.
(2) Depress the brake pedal several times and release
the brake pedal when the pump begins rotating.
Wait until the pump stops.
(3) Turn the ignition switch OFF.
(4) Depress the brake pedal with a force of 343 N (35
kgf, 77 lbf), record the fluid surface in the reservoir
tank of the hydraulic brake booster.
(5) Press the MAIN push switch for 10 sec., and check
that the fluid surface in the reservoir tank of the hy-
draulic brake booster does not rise up at this time.
If the fluid surface level rises up, replace the hydraulic brake
booster.
NOTICE:
Do not press MAIN push switch for more than 10 sec. When
operating the switch continuously, do it an interval of more
than 20 sec.
(6) Start the engine and run it at idle.
(7) Depress the brake pedal.
(8) Release the parking brake lever and shift the shift
lever to ºLº position.
(9) Once, release the brake pedal. After depressing the
brake pedal with stable force, then push and hold
MAIN push switch.
(10) Check that the left rear wheel rotates.
If the left rear wheel stops, replace the hydraulic brake booster.
(s) Stop the engine and lower the vehicle.

BR12C-05
F04456
F08307
BR-60
- BRAKEHYDRAULIC BRAKE BOOSTER
2196 Author
: Date
:
2004 LAND CRUISER (RM1071U)
REMOVAL
NOTICE:
Before starting the work, make sure that the ignition switch
is OFF and 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.
NOTICE:

As high pressure is applied to the brake actuator tube
No. 1, never deform it.

Until the work is over, do not turn the ignition switch
ON.
1. DRAW OUT FLUID WITH SYRINGE
NOTICE:
Do not let brake fluid remain on a painted surface. Wash it
off immediately.
2. REMOVE SCUFF PLATE, COWL SIDE TRIM, LOWER
NO. 1 PANEL, LH LOWER PANEL AND NO. 2 HEATER
TO REGISTER DUCT (See page BO-81)
3. REMOVE ABS OR ABS & TRAC & VSC ECU
Remove the 2 nuts and ABS or ABS & TRAC & VSC ECU.
Torque: 5.0 N´m (51 kgf´cm, 44 in.´lbf)
4. w/ ABS only:
DISCONNECT 4 CONNECTORS
5. w/ ABS & TRAC & VSC only:
DISCONNECT 5 CONNECTORS

BR0NC-06
F06434
SST
SST
- BRAKEPROPORTIONING AND BY-PASS VALVE (P & B
VALVE)BR-39
2175 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PROPORTIONING AND BY-PASS VALVE (P & B VALVE)
ON-VEHICLE INSPECTION
1. INSTALL LSPV GAUGE (SST) AND BLEED AIR
(a) Turn the ignition switch OFF, depress the brake pedal more than 40 times.
(b) Install the LSPV gauge (SST) and bleed air.
SST 09709-29018
(c) Turn the ignition switch ON, and wait until the pump motor has stopped.
2. RAISE FRONT BRAKE CALIPER PRESSURE AND CHECK REAR BRAKE CALIPER PRESSURE
Depress the brake pedal and check fluid pressure.
Front brake caliper pressureRear brake caliper pressure
2,256 kPa (23 kgf´cm2, 327 psi)2,452 kPa (25 kgf´cm2, 356 psi)
4,413 kPa (45 kgf´cm2, 640 psi)3,334 - 3,727 kPa (34 - 38 kgf´cm2, 484 - 540 psi)
7,845 kPa (80 kgf´cm2, 1,138 psi)5,197 kPa (53 kgf´cm2, 754 psi)
If the rear brake caliper pressure is incorrect, replace the hydraulic brake booster.
3. REMOVE LSPV GAUGE (SST) AND BLEED BRAKE SYSTEM (See page BR-4)
4. CHECK FOR FLUID LEAKAGE