Toyota Tundra 2005 Service - Repair - Maintenance page 2644

BR−68
BRAKE
(5)
At 49 N (5 kgf, 11 lbf):
(9.5 to 25.8 kgf/cm
At 98 N (10 kgf, 22 lbf):
(31.7 to 48.0 kgf/cm
At 147 N (15 kgf, 33 lbf):
(53.9 to 70.2 kgf/cm
At 196 N (20 kgf, 44 lbf):
(76.1 to 92.4 kgf/cm
2. INSPECT HYDRAULIC BRAKE BOOSTER OPERA-
TION
(a) Inspect the battery voltage.
Battery voltage: 10 to 14 V
(b) Turn the ignition switch off, and depress the brake pedal
more than 20 times.
HINT:
When pressure in the accumulator power supply system is re-
leased, reaction force becomes light and stroke becomes long-
er.
(c) Check that the brake pedal becomes light to depress.
If the pedal does not become light to depress, check and re-
place the brake line and hydraulic brake booster.
(d) Turn the ignition switch on, and check the pump motor op-
eration noise.
If the pump motor does not operate, check and replace the wire
harness and pump motor (See page BR−90).
(e) Connect the hand−held tester.
(1)
(2)
(3)
HINT:
Hand−held
S
Please refer to the hand−held tester operator's manual
Tester
for further details.
S
To protect solenoids, hand−held tester turns off automati-
D05981
cally 2 sec. after every solenoid has been turned on.
− HYDRAULIC BRAKE BOOSTER (w/ VSC)
Depress the brake pedal and check fluid pressure.
Front brake pressure
933 to 2,533 kPa
2
, 135 to 367 psi)
Front brake pressure
3,109 to 4,709 kPa
2
, 451 to 683 psi)
Front brake pressure
5,284 to 6,884 kPa
2
, 766 to 998 psi)
Front brake pressure
7,460 to 9,060 kPa
2
, 1,082 to 1,314 psi)
Connect the hand−held tester to the DLC3.
Turn the ignition switch on.
Select "ACTIVE TEST" mode on the hand−held tes-
ter.
Rear brake pressure
993 to 1,888 kPa
2
(10.1 to 19.3 kgf/cm , 144 to 274 psi)
Rear brake pressure
2,087 to 3,181 kPa
2
(21.3 to 32.4 kgf/cm , 303 to 461 psi)
Rear brake pressure
3,713 to 5,311 kPa
2
(37.9 to 54.2 kgf/cm , 539 to 770 psi)
Rear brake pressure
5,843 to 7,441 kPa
2
(59.6 to 75.9 kgf/cm ,
848 to 1,079 psi)