TOYOTA SIENNA 2007 Service Repair Manual

TW–82TIRE AND WHEEL – TIRE PRESSURE WARNING RECEIVER (w/ Antenna)
TW
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
2. REMOVE ROOF HEADLINING ASSEMBLY
HINT:
Refer to the instructions for REMOVAL of the ROOF
HEADLINING (See page IR-6).
3. REMOVE TIRE PRESSURE WARNING RECEIVER
ASSEMBLY
(a) Remove the bolt.
(b) Disconnect the connector and remove the tire
pressure warning receiver assembly.
INSTALLATION
1. INSTALL TIRE PRESSURE WARNING RECEIVER
ASSEMBLY
(a) Connect the connector.
(b) Install the tire pressure warning receiver assembly
with the bolt.
Torque: 5.0 N*m (51 kgf*cm, 44 in.*lbf)
2. INSTALL ROOF HEADLINING ASSEMBLY
HINT:
Refer to the instructions for INSTALLATION of the ROOF
HEADLINING (See page IR-14).
3. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
4. INSPECT TIRE PRESSURE WARNING SYSTEM
HINT:
See page TW-25.
C156704
C156705
C156705
C156704

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–25
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INITIALIZATION
1. DESCRIPTION OF INITIALIZATION
(a) Perform initialization in the following cases:
• Before delivery of a new vehicle.
• After replacement of the tire pressure warning
ECU*.
• After replacement of the tire pressure warning
valve and transmitter.
• Specified tire pressure changes depending on
the size or type of the tire.
*: Perform initialization after the transmitter ID
registration is completed (See page TW-20).
(b) Before initialization
(1) Set the air pressure of all tires to the specified
value.
Cold tire inflation pressure
NOTICE:
Perform the tire pressure adjustment after
the vehicle has sufficiently cooled down. If
the vehicle is not sufficiently cooled down,
increase the air pressure by 20 to 30 kPa (0.2
to 0.3 kgf/cm
2, 2.9 to 4.3 psi) above the
specified value.
Tire Size
kPa (kgf/cm2, psi)
P215/65R16
240 (2.4, 35)
P225/60R17

TW–26TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
2. INITIALIZATION PROCEDURE
(a) Make sure that the ignition switch is off.
(b) Connect the intelligent tester to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Select "TIREPRESS" by following the prompts
displayed on the intelligent tester.
(e) Press the tire pressure warning reset switch within
30 seconds after turning the ignition switch ON.
Keep the tire pressure warning reset switch pressed
for 3 seconds or more with the ignition switch ON.
(f) Check that the tire pressure warning light blinks 3
times (1 second ON, 1 second OFF).
HINT:
Initialization will be completed if signals are received
from all the wheels.
(g) Wait for 5 to 6 minutes with the ignition switch ON.
NOTICE:
• The initialization is normally completed
within 5 to 6 minutes.
• If the initialization has not been completed
successfully, DTC C2177/77 is set after the
vehicle is driven for 20 minutes or more.
• The initialization can be terminated by
connecting terminals TC and CG of the DLC3
connector.
3. CHECK THAT INITIALIZATION HAS BEEN
COMPLETED
(a) Confirm that the data of tire pressure of all tires are
displayed on the intelligent tester screen.
TIRE PRESSURE:
C159182E02
F100115E55
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
TIREPRESS1ID1 tire inflation pressure (Absolute
pressure) /
min.: 100 kPa (1 kgf/cm
2, 14 psi)
max.: 449.35 kPa (4.5 kgf/cm2, 63 psi)Actual tire inflation pressureIf 100 kPa (1 kgf/cm
2, 14 psi) for
absolute pressure is displayed, the
data has not been received.*
TIREPRESS2ID2 tire inflation pressure (Absolute
pressure) /
min.: 100 kPa (1 kgf/cm
2, 14 psi)
max.: 449.35 kPa (4.5 kgf/cm2, 63 psi)Actual tire inflation pressureIf 100 kPa (1 kgf/cm
2, 14 psi) for
absolute pressure is displayed, the
data has not been received.*

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–27
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HINT:
*: It may take about 5 to 6 minutes until the values
are displayed. If the values are not displayed after
several minutes, perform troubleshooting according
to the inspection procedure for DTCs C2121/21 to
C2124/24 (See page TW-42).
NOTICE:
The following operations can be used instead of
above procedure:
1. Turn the ignition switch from OFF to ON.
2. Monitor the tire pressure values of all the
wheels using the intelligent tester.
3. If the tire pressure values cannot be
displayed on the intelligent tester screen, the
initialization has failed.
4. It takes about 5 to 6 minutes to display the
tire pressure data.
TIREPRESS3ID3 tire inflation pressure (Absolute
pressure) /
min.: 100 kPa (1 kgf/cm2, 14 psi)
max.: 449.35 kPa (4.5 kgf/cm2, 63 psi)Actual tire inflation pressureIf 100 kPa (1 kgf/cm
2, 14 psi) for
absolute pressure is displayed, the
data has not been received.*
TIREPRESS4ID4 tire inflation pressure (Absolute
pressure) /
min.: 100 kPa (1 kgf/cm
2, 14 psi)
max.: 449.35 kPa (4.5 kgf/cm2, 63 psi)Actual tire inflation pressureIf 100 kPa (1 kgf/cm
2, 14 psi) for
absolute pressure is displayed, the
data has not been received.* Tester Display Measurement Item/Range Normal Condition Diagnostic Note

TIRE AND WHEEL – TIRE PRESSURE WARNING VALVE AND TRANSMITTERTW–83
TW
SUSPENSION & AXLE
TIRE AND WHEEL
TIRE PRESSURE WARNING VALVE AND TRANSMITTER
COMPONENTS
C155498E01

TW–84TIRE AND WHEEL – TIRE PRESSURE WARNING VALVE AND TRANSMITTER
TW
REMOVAL
1. REMOVE FRONT WHEEL
2. REMOVE REAR WHEEL
3. REMOVE TIRE PRESSURE WARNING VALVE AND
TRANSMITTER
(a) Remove the valve core and cap, and release the air
from the tire.
(b) After ensuring that a sufficient amount of air has
been released, remove the nut and washer that are
used to secure the tire pressure warning valve and
transmitter. Drop the tire pressure warning valve
and transmitter inside the tire.
HINT:
Keep the removed cap, valve core, nut, and washer.
(c) After dropping the tire pressure warning valve and
transmitter into the tire, disengage the bead using
the shoe of the tire remover.
NOTICE:
Be careful not to damage the tire pressure
warning valve and transmitter due to
interference between the valve and the tire bead.
(d) Remove the bead on the upper side in the usual
way.
(e) Take out the tire pressure warning valve and
transmitter from the tire and remove the bead on the
lower side in the usual way.
NOTICE:
If replacing the tire pressure warning valve and
transmitter, make sure that a new grommet and
a new washer are used.
INSTALLATION
1. INSTALL TIRE PRESSURE WARNING VALVE AND
TRANSMITTER
(a) Insert the tire pressure warning valve and
transmitter into the valve installation hole. Insert it
from the inside of the rim so that the printed surface
can be seen.
NOTICE:
• Check that there is no visible deformation,
damage, or other abnormalities on the tire
pressure warning valve and transmitter.
• Check that there is no foreign matter on the
inner grommet and around the rim hole.
• If the tire pressure warning valve and
transmitter is installed upside down, it may
be damaged or fail to transmit signals when
running at high speeds.
• If installing a new tire pressure warning valve
and transmitter, write down the ID number
before installation.
• It is necessary to register the ID in the ECU
after installation (See page TW-20).
F046444E05
C156697E01

TIRE AND WHEEL – TIRE PRESSURE WARNING VALVE AND TRANSMITTERTW–85
TW
(b) Install the washer on the tire pressure warning valve
and transmitter from the rim side and tighten the
nut.
Torque: 4.0 N*m (41 kgf*cm, 35 in.*lbf)
NOTICE:
• No further tightening is required once the nut
is tightened to the specified torque.
• Check that there is no foreign matter on the
washer and nut.
• If replacing the tire pressure warning valve
and transmitter, make sure that the new
grommet, washer, and nut are used.
• Check that there is no oil, water, or lubricant
around the rim hole, tire pressure warning
valve and transmitter, washer, and nut.
Failing to do so may result in improper
installation.
(c) Set the wheel disc to the mounting machine and
install the lower tire bead. Position the main body of
the tire pressure warning valve and transmitter in
the shaded area shown in the illustration.
NOTICE:
• If the tire pressure warning valve and
transmitter is positioned outside this area, it
will be interfered with the tire bead, and may
cause damage to the tire pressure warning
valve and transmitter.
• If the use of lubricant is required when
installing the bead, do not apply the lubricant
directly to the tire pressure warning valve and
transmitter.
(d) Install the upper bead.
NOTICE:
Make sure that the tire bead and tool do not
interfere with the main body of the tire pressure
warning valve and transmitter and that it is not
clamped by the bead.
(e) After the tire is inflated, the valve nut may be loose.
Retighten the nut to the specified torque and then
check for air leaks with soapy water.
Torque: 4.0 N*m (41 kgf*cm, 35 in.*lbf)
NOTICE:
No further tightening is required once the nut is
tightened to the specified torque.
2. INSTALL FRONT WHEEL
Torque: 103 N*m (1050 kgf*cm, 76 ft.*lbf)
3. INSTALL REAR WHEEL
Torque: 103 N*m (1050 kgf*cm, 76 ft.*lbf)
4. INSPECT TIRES
HINT:
See page TW-2.
C156696E01
C137868E01

TW–86TIRE AND WHEEL – TIRE PRESSURE WARNING VALVE AND TRANSMITTER
TW
5. REGISTER TRANSMITTER ID
HINT:
See page TW-20.
6. INSPECT TIRE PRESSURE WARNING SYSTEM
HINT:
See page TW-25.

TIRE AND WHEEL – TIRE PRESSURE WARNING VALVE AND TRANSMITTERTW–87
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DISPOSAL
HINT:
The tire pressure warning valve and transmitter is powered
by a lithium battery. When disposing of the tire pressure
warning valve and transmitter, remove the battery and
dispose of it correctly.
1. DISPOSE OF TIRE PRESSURE WARNING VALVE
AND TRANSMITTER
(a) Use the tip of a screwdriver to pry off the back
cover.
(b) The battery and base board covered with resin are
exposed. While taking out the battery, cut the 2
terminals that connect the battery to the base board.
C156694
C156695E01

TW–28TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
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TEST MODE PROCEDURE
1. ENTER TEST MODE
HINT:
• Operation of the tire pressure warning reset switch
can be checked in TEST MODE.
• During TEST MODE, the system is not initialized by
pushing the tire pressure warning reset switch. The
circuit of the tire pressure warning reset switch can be
inspected during this mode.
(a) Make sure that the ignition switch is off.
(b) Connect the intelligent tester to DLC3.
(c) Turn the ignition switch to the ON position.
(d) Check that the tire pressure warning light comes on
for 3 seconds and then goes off.
(e) Select the TEST MODE on the intelligent tester.
(f) Confirm that the tire pressure warning light in the
combination meter blinks at 0.125-second intervals.
2. PERFORM SIGNAL CHECK
HINT:
• When entering signal check mode, the tire pressure
warning ECU sets all the signal check DTCs first.
After completing signal check for each inspection
item, the DTCs for systems that are determined to be
normal by the tire pressure warning ECU will be
erased.
The DTCs for other inspection items may not be
erased when only a certain signal is inspected.
• When signal check returns to normal mode, all the
signal check DTCs will be erased.
(a) Make sure that the ignition switch is off.
(b) Connect the intelligent tester to DLC3.
(c) Turn the ignition switch to the ON position.
C122887
F100632E04