brakes TOYOTA SEQUOIA 2001 Service Repair Manual

± MAINTENANCEINSIDE VEHICLE
MA±3
50 Author: Date:
2005 SEQUOIA (RM1146U)
13. ACCELERATOR PEDAL
Check the pedal for smooth operation and uneven pedal effort or catching.
14. BRAKE PEDAL
(See page BR±6)
(a) Check the pedal for smooth operation.
(b) Check that the pedal has the proper reserve distance and free play.
(c) Check the brake booster function.
15. BRAKES
At a safe place, check that the brakes do not pull to one side when applied.
16. PARKING BRAKE
(See page BR±9)
(a) Check that the lever has the proper travel.
(b) On a safe incline, check that the vehicle is held securely with only the parking brake applied.
17. AUTOMATIC TRANSMISSION ºPARKº MECHANISM
On a safe incline, check that the vehicle is held securely with the selector lever in ºPº position and all brakes
released.

B02100
± MAINTENANCECHASSIS
MA±11
58 Author: Date:
2005 SEQUOIA (RM1146U)

Leaf spring U±bolt mounting nuts
Torque: 133 N´m (1,350 kgf´cm, 98 ft´lbf )
(b) Under Severe Conditions:
In addition to the above maintenance items, check for
loose or missing bolts and nuts on the following.

Steering system

Drive train

Suspension system

Fuel tank mounts

Engine mounts, etc.
14. FINAL INSPECTION
(a) Check operation of body parts:

Hood:

Auxiliary catch operates properly

Hood locks securely when closed

Doors:

Door locks operate properly

Doors close properly

Seats:

Seat adjusts easily and locks securely in any
positions

Seat backs lock securely at any angle

Fold±down seat backs lock securely
(b) Road test:

Engine and chassis parts do not have abnormal
noises.

Vehicle does not wander or pull to one side.

Brakes work properly and do not drag.
(c) Be sure to deliver a clean vehicle and especially check:

Steering wheel

Shift lever knob

All switch knobs

Door handles

Seats

DI±600
± DIAGNOSTICSAUTOMATIC TRANSMISSION
794 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock±up condition when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724
The stop light switch remains ON even when the vehicle is
driven in a STOP (less than 3 km/h (2 mph)) and GO (30 km/h
(19 mph) or more) fashion 5 times. (2±trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during ºstop
and goº driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) ten
times for two driving cycles in order to detect a malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 5 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not present.See page DI±545
Battery voltage8 V or more±
Ignition switchON
StarterOFF
GO (Vehicle speed is 30 km/h
(18.63 mph) or more)Once
STOP (Vehicle speed is less than 3 km/h
(1.86 mph))Once
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switchRemain ON during GO and STOP 5 times
DIDJA±01

D14169
1±2 Shift Valve
Valve Body:
DI±636
± DIAGNOSTICSAUTOMATIC TRANSMISSION
830 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0781 1±2 Shift (1±2 Shift Valve)
SYSTEM DESCRIPTION
The 1±2 shift valve performs shifting to 1st gear and other
gears.
DTC No.DTC Detection ConditionTrouble Area
P0781The gear required by the ECM does not match the actual gear
when driving (2±trip detection logic)
Valve body is blocked up or stuck (1±2 shift valve)

Automatic transmission (clutch, brake or gear, etc.)
MONITOR DESCRIPTION
This DTC indicates that the 1±2 shift valve in the valve body is locked in the direction the spring compresses.
The ECM commands gear shifts by turning the shift solenoid valves ºON/OFFº and switching oil pressure
to the valves in the valve body.
The ECM calculates the ºactualº transmission gear by comparing the signals from the input speed sensor
(NCO) and the output speed sensor (SP2). The ECM can detect many mechanical problems in the shift sole-
noids, valve body, and the transmission clutches, brakes, and gears. If the ECM detects that the actual gear
position and the commanded gear position are different, it will illuminate the MIL and store the DTC .
MONITOR STRATEGY
Related DTCsP0781Valve body/Rationality check
MainValve body
Required sensors/ComponentsSubAutomatic transmission assembly, Speed sensor (NT), Speed sensor
(NO), Vehicle speed sensor, Throttle speed sensor
Frequency of operationContinuous
Conditions (A) and (B)0.4 sec.
DurationCondition (C)3 sec.Duration
Condition (D)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIDJH±01

DIDLX±01
DI±894
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1088 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
HINT:

The yaw rate sensor and deceleration sensor are combined and in a single unit. This unit communi-
cates with the skid control ECU through the CAN communication system.

No changes have been made to the communication method between the VSC system and ECM. How-
ever, the communication method between the Translate ECU and ECM has been changed from serial
to CAN communication.
(a) ABS
(Anti±lock Brake System)
The ABS helps prevent the wheels from locking when the brakes are applied firmly or when braking
on a slippery surface.
(b) EBD
(Electronic Brake force Distribution)
The EBD control utilizes ABS, realizing proper brake force distribution between front and rear wheels
in accordance with driving conditions.
In addition, during braking while cornering, it also controls the brake forces of the right and left wheels,
helping to maintain vehicle behavior.
(c) BA (Brake Assist)
The primary purpose of the brake assist system is to provide an auxiliary brake force to assist the driver
who cannot generate a large enough brake force during emergency braking, thus helping to maximize
the vehicle's braking performance.
(d) TRAC
(Traction Control)
The TRAC system helps prevent the drive wheels from slipping if the driver presses down on the accel-
erator pedal excessively when starting off or accelerating on a slippery surface.
(e) VSC
(Vehicle Stability Control)
The VSC system helps prevent the vehicle from slipping sideways as a result of strong front wheel skid
or strong rear wheel skid during cornering.
2. ABS with EBD & BA & TRAC & VSC OPERATION
(a) The skid control ECU calculates vehicle stability tendency based on signals from the speed sensor,
yaw rate (deceleration) sensor and steering angle sensor. In addition, it evaluates the results of the
calculations to determine whether any control actions (control of the engine output torque by electronic
throttle control and of the wheel brake pressure by the brake actuator) should be implemented.
(b) The SLIP indicator blinks and the VSC buzzer sounds to inform the driver that the VSC system is oper-
ating. The SLIP indicator also blinks when TRAC is operating, and the operation being performed is
displayed.
3. FAIL SAFE FUNCTION
(a) When a failure occurs in the ABS & BA & TRAC & VSC systems, the ABS and VSC warning lights come
on and ABS & BA & TRAC & VSC operations are prohibited. In addition to this, when there is a failure
that disables EBD operation, the brake warning light also comes on and EBD operation is prohibited.
(b) If some control is prohibited due to a malfunction during its operation, that control will be cut off gradual-
ly not to change the stability of the vehicle suddenly.

SA23I±04
R13426
F07263
F07264
F07265
SA±22
± SUSPENSION AND AXLEFRONT AXLE HUB
3018 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE GREASE CAP
Using a screwdriver and hammer, remove the grease cap.
3. 4WD:
DISCONNECT DRIVE SHAFT
(a) Remove the cotter pin and lock cap.
(b) While applying the brakes, remove the lock nut.
4. DISCONNECT SPEED SENSOR AND WIRE HARNESS
CLAMP FROM STEERING KNUCKLE
Remove the 2 bolts and disconnect the speed sensor and wire
harness clamp from the steering knuckle.
5. REMOVE BRAKE CALIPER AND DISC
(a) Remove the bolt and brake line clamp from the steering
knuckle.
(b) Remove the 2 bolts, brake caliper and disc.
NOTICE:
Do not damage the brake tube.
(c) Support the brake caliper securely.
6. REMOVE SHOCK ABSORBER (See page SA±64)
7. DISCONNECT LOWER BALL JOINT
Remove the 4 bolts and disconnect the lower ball joint.
8. REMOVE STEERING KNUCKLE
(a) Remove the cotter pin and loosen the nut.

SA23J±05
SA±28
± SUSPENSION AND AXLEFRONT AXLE HUB
3024 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL STEERING KNUCKLE
(a) 4WD:
Insert the drive shaft into the axle hub and temporarily tighten the nut.
NOTICE:
Be careful not to damage the oil seal and drive shaft boot.
(b) Connect the steering knuckle to the upper suspension arm.
(c) Install the nut and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
Torque: 105 N´m (1,100 kgf´cm, 77 ft´lbf)
2. CONNECT LOWER BALL JOINT
Connect the lower ball joint to the steering knuckle with the 4 bolts.
Torque: 65 N´m (663 kgf´cm, 48 ft´lbf)
3. INSTALL SHOCK ABSORBER (See page SA±70)
4. INSTALL BRAKE CALIPER
(a) Install the disc, brake caliper and 2 bolts.
Torque: 123 N´m (1,250 kgf´cm, 90 ft´lbf)
(b) Install the brake line clamp to the steering knuckle with the bolt.
Torque: 28 N´m (285 kgf´cm, 21 ft´lbf)
5. CONNECT SPEED SENSOR AND WIRE HARNESS CLAMP
Connect the speed sensor and wire harness clamp to the steering knuckle with the 2 bolts.
Torque: 8.0 N´m (82 kgf´cm, 71 ft´lbf)
6. 4WD:
INSTALL DRIVE SHAFT LOCK NUT
(a) While applying the brakes, tighten the nut.
Torque: 235 N´m (2,400 kgf´cm, 173 ft´lbf)
(b) Install the lock cap and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
7. INSTALL GREASE CAP
8. INSTALL FRONT WHEEL
Torque: 110 N´m (1,150 kgf´cm, 83 ft´lbf)
9. DEPRESS BRAKE PEDAL SEVERAL TIMES
10. CHECK FRONT WHEEL ALIGNMENT (See page SA±4)
11. CHECK SPEED SENSOR SIGNAL (See page DI±899)
12. PERFORM ZERO POINT CALIBRATION OF STEERING ANGLE, MASTER CYLINDER PRES-
SURE, YAW RATE AND DECELERATION SENSORS (See page DI±897)

SA24L±03
F06624
R12863
SST
R13233
± SUSPENSION AND AXLEFRONT DRIVE SHAFT
SA±31
3027 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE ENGINE UNDER COVER
3. DRAIN DIFFERENTIAL OIL
4. REMOVE DRIVE SHAFT LOCK NUT
(a) Using a screwdriver and hammer, remove the grease cap.
(b) Remove the cotter pin and lock cap.
(c) While applying the brakes, remove the lock nut.
5. DISCONNECT LOWER SUSPENSION ARM FROM
LOWER BALL JOINT
(a) Remove the cotter pin and nut.
(b) Using SST, disconnect the lower suspension arm from the
lower ball joint.
SST 09628±62011
6. DISCONNECT DRIVE SHAFT FROM STEERING
KNUCKLE
(a) Using a plastic hammer, disengage the drive shaft from
the axle hub.
(b) Push the steering knuckle outward and disconnect the
drive shaft from the steering knuckle.
NOTICE:
Be careful not to damage the oil seal, boots and dust seal.
7. LH drive shaft:
REMOVE LH SHOCK ABSORBER (See page SA±64)

SA14I±10
SA±36
± SUSPENSION AND AXLEFRONT DRIVE SHAFT
3032 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL DRIVE SHAFT TO DIFFERENTIAL
(a) Install a new snap ring to the inboard joint shaft.
(b) Apply gear oil to the inboard joint shaft and differential case sliding surface.
(c) Set the snap ring with opening side facing downward.
(d) Using a brass bar and hammer, install the drive shaft.
NOTICE:
Be careful not to damage the dust cover and oil seal.
HINT:
Whether the inboard joint shaft is in contact with the pinion shaft or not can be known from the sound or feel-
ing when driving.
(e) Check that there is 2 ± 3 mm (0.08 ± 0.12 in.) of play in the axial direction.
(f) Check that the drive shaft cannot be removed by hand.
2. LH drive shaft:
INSTALL LH SHOCK ABSORBER (See page SA±70)
3. CONNECT DRIVE SHAFT TO STEERING KNUCKLE
NOTICE:
Be careful not to damage the oil seal, boots and dust seal.
4. CONNECT LOWER SUSPENSION ARM TO LOWER BALL JOINT
(a) Connect the lower suspension arm to the lower ball joint.
(b) Install the nut and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
HINT:
Face the hole for the cotter pin forward.
Torque: 140 N´m (1,450 kgf´cm, 103 ft´lbf)
5. INSTALL DRIVE SHAFT LOCK NUT
(a) While applying brakes, install the nut.
Torque: 235 N´m (2,400 kgf´cm, 173 ft´lbf)
(b) Install the lock cap and a new cotter pin.
If the holes for the cotter pin are not aligned, tighten the nut further up to 60°.
6. FILL DIFFERENTIAL WITH HYPOID GEAR OIL (See page SA±38)
7. INSTALL ENGINE UNDER COVER
8. INSTALL FRONT WHEEL
Torque: 110 N´m (1,150 kgf´cm, 83 ft´lbf)

± BRAKETROUBLESHOOTING
BR±3
3170 Author: Date:
2005 SEQUOIA (RM1146U) Hard pedal but brake inefficient
1. Fluid leaks for brake system
2. Air in brake system
3. Pad (Worn)
4. Pad (Cracked or distorted)
5. Pad (Oily)
6. Pad (Glazed)
7. Disc (Scored)
8. Vacuum leaks for booster systemDI±1059
BR±4
BR±24
BR±33
BR±24
BR±33
BR±24
BR±33
BR±24
BR±33
BR±30
BR±39
BR±21
Noise from brakes
1. Pad (Cracked or distorted)
2. Installation bolt (Loose)
3. Disc (Scored)
4. Pad support plate (Loose)
5. Sliding pin (Worn)
6. Pad (Dirty)
7. Pad (Glazed)
8. Tension or return spring (Faulty)
9. Anti±squeal shim (Damaged)
10.Shoe hold±down spring (Damaged)BR±24
BR±33
BR±27
BR±36
BR±30
BR±39
BR±33
BR±36
BR±24
BR±33
BR±24
BR±33
BR±42
BR±24
BR±33
BR±42