tires TOYOTA SIENNA 2007 Service Owner's Manual

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–45
TW
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies
measure the air pressure of the tires. The measured values are transmitted to the tire pressure warning
antenna and receiver on the body as radio waves and then sent to the tire pressure warning ECU. The
ECU compares the measured air pressure values with the air pressure threshold. When the measured air
pressure value is less than this threshold, the warning light in the combination meter comes on.
The tire pressure warning valve and transmitters constantly send radio waves to the tire pressure warning
antenna and receiver.
Under the following conditions below, the tire pressure warning antenna and receiver is unable to receive
the signals from the tire pressure warning valves and transmitters, and a DTC is stored.
• Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.
• Devices using similar radio frequencies are used in the vehicle.
• The goods which obstruct the radio signal of the valve and transmitter, for example, tire chain or
window film.
HINT:
When no signals are received for 20 minutes or more, a DTC is output.
DTCs from C2121/21 to C2124/24 can only be cleared by using the tester. DTCs from C2181/81 to
C2184/84 can be cleared when the transmitter in the tire pressure warning valve and transmitter sends a
forced transmission signal or test mode ends. DTCs from C2181/81 to C2184/84 are output only in test
mode.
HINT:
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is
malfunctioning because it cannot be identified by the output DTC.
DTC C2121/21 No Signal from Transmitter ID1
DTC C2122/22 No Signal from Transmitter ID2
DTC C2123/23 No Signal from Transmitter ID3
DTC C2124/24 No Signal from Transmitter ID4
DTC C2181/81 Transmitter ID1 not Received (Test Mode DTC)
DTC C2182/82 Transmitter ID2 not Received (Test Mode DTC)
DTC C2183/83 Transmitter ID3 not Received (Test Mode DTC)
DTC C2184/84 Transmitter ID4 not Received (Test Mode DTC)
DTC No. DTC Detection Condition Trouble Area
C2121/21
C2122/22
C2123/23
C2124/24These DTCs are detected when no signals are received
for 20 minute drive or more.• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECU
C2181/81
C2182/82
C2183/83
C2184/84Malfunction in the transmitting/receiving circuit• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECU

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–53
TW
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies
measure the air pressure of the tires. The measured values are transmitted to the tire pressure warning
antenna and receiver on the body as radio waves and then sent to the tire pressure warning ECU. The
ECU compares the measured air pressure values with the air pressure threshold. When the measured air
pressure value is less than this threshold, the warning light in the combination meter comes on.
When the internal circuit of the tire pressure warning valve and transmitter is malfunctioning, this DTC is
output.
HINT:
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is
malfunctioning because it cannot be identified by the output DTC.
INSPECTION PROCEDURE
NOTICE:
• When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the
intelligent tester and write them down before removal.
• It is necessary to perform initialization (See page TW-23) after registration (See page TW-20) of
the transmitter IDs into the tire pressure warning ECU after the ECU and/or valve and
transmitter have been replaced.
(a) Set the tire pressure to the specified value.
Cold tire inflation pressure
(b) Make sure that the ignition switch is off.
(c) Connect the intelligent tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Display the "TIREPRESS" data for each wheel using the
intelligent tester.
DTC C2141/41 Transmitter ID1 Error
DTC C2142/42 Transmitter ID2 Error
DTC C2143/43 Transmitter ID3 Error
DTC C2144/44 Transmitter ID4 Error
DTC No. DTC Detection Condition Trouble Area
C2141/41
C2142/42
C2143/43
C2144/44The battery of the valve and transmitter is expired.• Tire pressure warning valve and transmitter
• Tire pressure warning ECU
1IDENTIFY TRANSMITTER CORRESPONDING TO DTC
Tire Size
kPa (kgf/cm2, psi)
P215/65R16
240 (2.4, 35)
P225/60R17

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–57
TW
DESCRIPTION
Each tire pressure warning valve and transmitter measures the internal temperature of its tire as well as
tire pressure, and transmits the information to the tire pressure warning ECU along with the transmitter ID.
If the measured temperature is out of the specified range, the tire pressure warning ECU recognizes it as
a malfunction, outputs DTCs, and illuminates the tire pressure warning light after blinking for 1 minute.
HINT:
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is
malfunctioning because it cannot be identified by the output DTC.
INSPECTION PROCEDURE
NOTICE:
• When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the
intelligent tester and note them down before removal.
• It is necessary to perform initialization (See page TW-23) after registration (See page TW-20) of
the transmitter IDs into the tire pressure warning ECU after the ECU and/or valve and
transmitter have been replaced.
(a) Check the tire is not flat, and there is no indication of air
pressure drop.
OK:
Tire is normal.
HINT:
If a tire is damaged, the tire pressure warning valve and
transmitter may also have been damaged at the same
time.
NG
OK
(a) Set the tire pressure to the specified value.
DTC C2165/65 Abnormal Temperature Inside ID1 Tire
DTC C2166/66 Abnormal Temperature Inside ID2 Tire
DTC C2167/67 Abnormal Temperature Inside ID3 Tire
DTC C2168/68 Abnormal Temperature Inside ID4 Tire
DTC No. DTC Detection Condition Trouble Area
C2165/65
C2166/66
C2167/67
C2168/68Temperature inside the tire exceeds 119
C (246.2F).•Tires
• Tire pressure warning valve and transmitter
• Tire pressure warning ECU
1CHECK TIRES
REPLACE TIRE AND TIRE PRESSURE
WARNING VALVE AND TRANSMITTER (See
page TW-84)
2IDENTIFY TRANSMITTER CORRESPONDING TO DTC

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–59
TW
• When no "TIREPRESS" data has changed, reset
the tire pressure to the appropriate specified
value and rotate the tire 90 to 270 degrees. Then
forcibly transmit the transmitter ID and recheck it.
• Record the transmitter ID and position that is
normal condition.
NEXT
(a) Replace the identified tire pressure warning valve and
transmitter with a new one (See page TW-84).
HINT:
• Before installing a new tire pressure warning valve
and transmitter, read and write down its transmitter
ID.
• The IDs for the tire pressure warning valve and
transmitter which are not replaced should be checked
using the tester and recorded.
NEXT
(a) Register the transmitter ID for 4 tires (See page TW-20).
NEXT
(a) Perform initialization (See page TW-23).
NEXT
(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.
TIRE PRESSURE:
3REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER
4CHECK REGISTRATION OF TRANSMITTER ID
5PERFORM INITIALIZATION
6READ VALUE ON INTELLIGENT TESTER
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.*

TW–66TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
DESCRIPTION
Initialization is necessary after replacing any of the ECUs, tires with different tire pressure, or tire pressure
warning valve and transmitter, after rotating the tires or when a new vehicle is delivered.
WIRING DIAGRAM
DTC C2177/77 Initialization not Completed
DTC No. DTC Detection Condition Trouble Area
C2177/77Initialization is not completed after vehicle speed of 5
mph (8 km/h) or more continues for 20 minutes or more
(total).• Tire pressure warning valve and transmitter
• Tire pressure warning ECU
• Tire pressure warning antenna and receiver
• Wire harness or connector
B166325E03

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–21
TW
REGISTRATION
1. DESCRIPTION OF CODE REGISTRATION
It is necessary to register the transmitter ID in the tire
pressure warning ECU when replacing the tire pressure
warning valve and transmitter and/or tire pressure
warning ECU.
(a) Before registration
(1) In case of tire pressure warning ECU
replacement.
• Read the registered transmitter IDs that are
stored in the old ECU using the intelligent
tester and note them down.
• If reading stored transmitter IDs is
impossible due to malfunctions of
components such as the tire pressure
warning antenna and receiver, remove the
tires from the wheels and check the IDs
located on the tire pressure warning valves
and transmitters (See page TW-10).
(2) In case of tire pressure warning valve and
transmitter replacement.
• When replacing the tire pressure warning
valves and transmitters, note down the IDs
written on the tire pressure warning valves
and transmitters.
• Take a note of the 8-digit number
(transmitter ID) written on the tire pressure
warning valve and transmitter.
C159177E01

TW–22TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
NOTICE:
• The transmitter ID is written on the tire
pressure warning valve and
transmitter. It will be unable to be read
after installing the tire pressure
warning valve and transmitter on the
tire and wheel. Therefore, take a note
of the transmitter ID before installing
the tire pressure warning valve and
transmitter.
• The ID registration must be performed
for all tire pressure warning valve and
transmitters. Check the DATA LIST,
replace the exchanged ID with a new
ID, and make a new data list of all 4
tires for the vehicle.
2. REGISTER TRANSMITTER ID (Using Intelligent
Te s t e r )
(a) Connect the intelligent tester to DLC3 (Procedure
"A").
(b) Turn the ignition switch to the ON position
(Procedure "B").
(c) Select the REGIST TIRE following the intelligent
tester screen (UTILITY - REGIST TIRE) (Procedure
"C").
(d) Input the IDs (ID1 to ID4) using the intelligent tester
and transmit them to the tire pressure warning ECU
(Procedure "D").
(e) Set the ID transmission condition to "ID Registration
is complete" (Procedure "E").
HINT:
• The previously registered IDs will be deleted
from the memory when the registration is
completed.
• If the procedures "C" to "D" are not completed
within 5 min., the mode will return to the normal
operation mode.
• If the registration cannot be completed with error,
connect TC to GND of DLC3, then retry.
• When the system is in initialization mode after
the tire pressure warning reset switch has been
operated, the registration is disabled until the
initialization process is canceled or completed.
F100622
C107265

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–23
TW
3. CONFIRMATION OF TRANSMITTER ID
REGISTRATION
(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) Select "TIREPRESS" by following the prompts
displayed on the intelligent tester.
(e) Confirm that the data of tire pressure of all tires are
displayed on the intelligent tester screen.
NOTICE:
• It may take about 5 to 6 minutes to update the
tire pressure data.
• If the IDs have not been registered, DTC
C2171/71 is set in the tire pressure warning
ECU after 3 minutes or more.
F101083E01

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–25
TW
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.*