2007 TOYOTA SIENNA Steering

SUSPENSION – FRONT STABILIZER BAR (for 4WD)SP–37
SP
INSTALLATION
1. INSTALL FRONT STABILIZER BAR
2. INSTALL NO. 1 FRONT STABILIZER BAR BUSHING
(a) Install the 2 front stabilizer bar bush No.1 to the
stabilizer bar front.
NOTICE:
Install the bushings with the slit facing on the
rear side of the vehicle.
HINT:
Install the bushing to the outer side of the bushing
stopper on the stabilizer bar as shown in the
illustration.
3. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY RH
HINT:
(See page EM-48)
4. INSTALL MANIFOLD STAY
HINT:
(See page EM-51)
5. INSTALL STEERING INTERMEDIATE SHAFT
ASSEMBLY
HINT:
(See page PS-21)
6. INSTALL RACK & PINION POWER STEERING GEAR
ASSEMBLY
HINT:
(See page PS-21)
7. CONNECT PRESSURE FEED TUBE ASSEMBLY
HINT:
(See page PS-21)
SST 09023-12701
8. INSTALL TIE ROD ASSEMBLY LH
HINT:
(See page AH-4)
9. INSTALL TIE ROD ASSEMBLY RH
HINT:
Remove the RH side by the same procedures as the LH
side.
10. INSTALL NO. 1 FRONT STABILIZER BRACKET LH
(a) Install the front stabilizer bracket No.1 LH with the 2
bolts.
Torque: 17 N*m (173 kgf*cm, 12 ft.*lbf)
11. INSTALL NO. 1 FRONT STABILIZER BRACKET RH
HINT:
Install the RH side by the same procedures as the LH
side.
12. INSTALL CENTER EXHAUST PIPE ASSEMBLY
HINT:
(See page EX-10)
F044967E01
F044966

SP–38SUSPENSION – FRONT STABILIZER BAR (for 4WD)
SP
13. INSTALL FRONT STABILIZER LINK ASSEMBLY LH
HINT:
(See page AH-4)
14. INSTALL FRONT STABILIZER LINK ASSEMBLY RH
HINT:
Install the RH side by the same procedures as the LH
side.
15. INSTALL FRONT WHEELS
16. INSPECT CENTER FRONT WHEEL
17. INSPECT STEERING WHEEL CENTER POINT
18. ADD POWER STEERING FLUID
19. BLEED POWER STEERING FLUID
HINT:
(See page PS-6)
20. CHECK POWER STEERING FLUID LEAKAGE
21. INSPECT AND ADJUST FRONT WHEEL ALIGNMENT
HINT:
(See page SP-4)

BC–4BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
TEST MODE PROCEDURE
1. SPEED SENSOR SIGNAL CHECK (WHEN USING SST
CHECK WIRE):
HINT:
• If the ignition switch is turned from the ON to the ACC
or LOCK position during Test Mode, the DTCs of the
signal check function will be erased.
(a) Turn the ignition switch off.
(b) Check that the steering wheel is in the straight-
ahead position and move the shift lever to the P
position (Automatic Transmission) or apply the
parking brake (Manual Transmission).
(c) Using SST, connect terminals TS and CG of the
DLC3.
SST 09843-18040
(d) Turn the ignition switch to the ON position.
(e) Check that the ABS warning light is blinking in the
Test Mode.
HINT:
If the ABS warning light does not blink, inspect the
TS and CG terminal circuit and the ABS warning
light circuit.
(f) Start the engine.
(g) Using SST, perform the speed sensor signal check
in Test Mode.
SST 09843-18040
(h) Drive the vehicle straight forward.
(i) Accelerate the vehicle to a speed of 28 mph (45 km/
h) or higher for several seconds and check that the
ABS warning light goes off.
HINT:
The signal check may not be completed if the
vehicle has its wheels spun.
(j) Stop the vehicle.
NOTICE:
• The speed sensor signal check may not be
completed if the steering wheel is turned or
the wheels are spun during the check.
G022987E07
BR03904E13
Trouble Area See procedure
TS and CG terminal circuitBC-64
ABS warning light circuitBC-47 or BC-50

BC–6BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEM
BC
HINT:
The codes in this table are output only in Test Mode
(signal check).
4. SPEED SENSOR SIGNAL CHECK (WHEN USING
INTELLIGENT TESTER):
HINT:
• If the ignition switch is turned from the ON to the ACC
or LOCK position during Test Mode, DTCs of the
signal check function will be erased.
• During Test Mode, the ECU records all DTCs of the
signal check function. By performing the signal check,
the codes are erased if normality is confirmed. The
remaining codes are the codes where an abnormality
was found.
(a) Turn the ignition switch off.
(b) Check that the steering wheel is in the straight-
ahead position.
(c) Connect the intelligent tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Set the intelligent tester to Test Mode (select
"SIGNAL CHECK").
HINT:
Refer to the intelligent tester operator's manual for
further details.
C1274/74 Low output signal of rear speed sensor LH• Rear speed sensor LH
• Sensor installation
• Speed sensor rotor
C1275/75Abnormal change in output signal of front speed sensor
RHSpeed sensor rotor
C1276/76Abnormal change in output signal of front speed sensor
LHSpeed sensor rotor
C1277/77Abnormal change in output signal of rear speed sensor
RHSpeed sensor rotor
C1278/78Abnormal change in output signal of rear speed sensor
LHSpeed sensor rotor Code No. Diagnosis Trouble Area
E144486E01

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–7
BC
(f) Check that the ABS warning light is blinking in the
Test Mode.
HINT:
If the ABS warning light does not blink, inspect the
TS and CG terminal circuit and the ABS warning
light circuit.
(g) Start the engine.
(h) Using the intelligent tester, perform the speed
sensor signal check in Test Mode.
(i) Drive the vehicle straight forward.
(j) Accelerate the vehicle to a speed of 28 mph (45 km/
h) or higher for several seconds and check that the
ABS warning light goes off.
HINT:
The signal check may not be completed if the
vehicle has its wheels spun.
(k) Stop the vehicle.
NOTICE:
• The speed sensor signal check may not be
completed if the steering wheel is turned or
the wheels are spun during the check.
• After the ABS warning light goes off and if
vehicle speed exceeds 50 mph (80 km/h), a
signal check code will be stored again.
Decelerate or stop the vehicle before the
speed reaches 50 mph (80 km/h).
• If the signal check has not been completed,
the ABS warning light blinks while driving
and the ABS system does not operate.
HINT:
When the signal check has been completed, the
ABS warning light goes off while driving and blinks
in the Test Mode pattern while stationary.
5. READ DTC
(a) Read the DTC(s) by following the tester screen.
HINT:
• Refer to the intelligent tester operator's manual
for further details.
• See the list of DTC.
6. DTC OF TEST MODE (SIGNAL CHECK) FUNCTION
BR03904E13
Trouble Area See procedure
TS and CG terminal circuitBC-64
ABS warning light circuitBC-47 or BC-50
Code No. Diagnosis Trouble Area
C1271/71 Low output signal of front speed sensor RH• Front speed sensor RH
• Sensor installation
• Speed sensor rotor
C1272/72 Low output signal of front speed sensor LH• Front speed sensor LH
• Sensor installation
• Speed sensor rotor
C1273/73 Low output signal of rear speed sensor RH• Rear speed sensor RH
• Sensor installation
• Speed sensor rotor

BRAKE CONTROL – ANTI-LOCK BRAKE SYSTEMBC–21
BC
(b) Check that there is the speed value output from the
speed sensor displayed on the intelligent tester and the
speed value displayed on the speedometer are almost
the same when driving the vehicle.
OK:
The speed value output from the speed sensor
displayed on the intelligent tester is the same as
the actual vehicle speed.
NG
OK
(a) Clear the DTC (See page BC-10).
(b) Perform sensor signal check in TEST MODE
PROCEDURE (See page BC-3).
OK:
All Test Mode DTCs are erased.
OK
NG
(a) Turn the ignition switch off.
(b) Check the speed sensor installation.
OK:
The installation bolt is tightened properly.
There is no clearance between the sensor and the
front steering knuckle.
To r q u e :
8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE:
Check the speed sensor signal after replacement
(See page BC-3).
NG
OK
(a) Remove the front speed sensor (See page BC-187).
(b) Check the sensor tip.
WHEEL SPD FLWheel speed sensor (FL) reading
/ min.: 0 km/h (0 mph), max.: 326
km/h(202 mph)Actual wheel speedSimilar speed as indicated on
speedometer Item (Display)Measurement Item / Range
(Display)Normal Condition Diagnostic Note
Go to step 3
2PERFORM TEST MODE INSPECTION (SIGNAL CHECK)
Go to step 8
3INSPECT FRONT SPEED SENSOR INSTALLATION
BR03795E21
INSTALL FRONT SPEED SENSOR
CORRECTLY
4INSPECT SPEED SENSOR TIP

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–71
BC
2. PERFORM ZERO POINT CALIBRATION OF YAW
RATE AND DECELERATION SENSOR (WHEN USING
INTELLIGENT TESTER):
NOTICE:
• While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
in a stationary condition. (Do not turn the ignition
switch to the ON position.)
• Be sure to do this on a level surface (with an
inclination of less than 1 %).
(a) Procedures for test mode.
(1) Check that the steering wheel is in the straight-
ahead position and move the shift lever to the P
position and apply the parking brake.
(2) Connect the intelligent tester to the DLC3.
(3) Turn the ignition switch to the ON position.
(4) Set the intelligent tester to test mode (select
"TEST MODE").
HINT:
Refer to the intelligent tester operator's manual
for further details.
(b) Obtain the zero point of the yaw rate and
deceleration sensor.
(1) Keep the vehicle in the stationary condition on a
level surface for 2 seconds or more.
(2) Check that the ABS warning light and VSC
warning light blink.
HINT:
• If the ABS warning light and VSC warning
light do not blink perform zero point
calibration again.
• The zero point calibration is performed only
once after the system enters the test mode.
• Calibration cannot be performed again until
the stored data is cleared once.
(c) Turn the ignition switch off and disconnect the
intelligent tester.
E144486E01
C106532
BR03904E37

BC–72BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
3. PERFORM ZERO POINT CALIBRATION OF YAW
RATE AND DECELERATION SENSOR (WHEN USING
SST CHECK WIRE):
NOTICE:
• While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
in a stationary condition. (Do not turn the ignition
switch to the ON position.)
• Be sure to do this on a level surface (with an
inclination of less than 1 %).
(a) Clear the zero point calibration.
(1) Turn the ignition switch to the ON position.
(2) Using SST, connect and disconnect terminals
TS and CG of the DLC3 4 times or more within 8
seconds.
SST 09843-18040
(b) Procedures for test mode.
(1) Turn the ignition switch off.
(2) Using SST, connect terminals TS and CG of the
DLC3.
SST 09843-18040
(3) Check that the steering wheel is in the
straightahead position and move the shift lever
to the P position.
(c) Obtain the zero point of the yaw rate and
deceleration sensor.
(1) Turn the ignition switch to the ON position.
(2) Keep the vehicle in a stationary condition on a
level surface for 2 seconds or more.
(3) Check that the ABS warning light and VSC light
blink (test mode).
HINT:
• If the ABS warning light and VSC warning
light do not blink perform zero point
calibration again.
• The zero point calibration is performed only
once after the system enters the test mode.
• Calibration cannot be performed again until
the stored data is cleared once.
(d) Turn the ignition switch off and disconnect the SST
from the DLC3.
G022987E07
BR03904E38