2007 TOYOTA SIENNA Service Repair Manual

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Page 2289 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–47
TW
(1) Facilities or devices that use similar radio
frequencies are located in the vicinity of the vehicle.
HINT:
If the vehicle is located in

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–47
TW
(1) Facilities or devices that use similar radio
frequencies are located in the vicinity of the vehicle.
HINT:
If the vehicle is located in areas described above,
the tire pressure warning light may come on after
blinking 1 minute only in a particular area.
(2) Devices using similar radio frequencies are used in
the vehicle.
OK:
Facilities, or devices that use similar radio
frequencies are not located in the vicinity of
the vehicle.
HINT:
Radio frequency may be interrupted due to
surroundings or devices installed by the user.
NG
OK
(a) Set the tire pressure to the appropriate specified values.
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) Select "TIREPRESS" by following the prompts displayed
on the intelligent tester.
TIRE PRESSURE:
HINT:
*: It may take about 5 to 6 minutes until the values are
displayed.CHECK IF ANY DEVICE IS INSTALLED BY
USER
2IDENTIFY TRANSMITTER CORRESPONDING TO DTC
Tire Size
kPa (kgf/cm2, psi)
P215/65R16
240 (2.4, 35)
P225/60R17
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.*
TIREPRESS3ID3 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.*
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.*

Page 2290 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–48TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(f) Rapidly reduce the tire pressure for each wheel at least
40 kPa (0.41 kg/cm
2, 5.8 psi) within 30 seconds.
(g) Check the DATA LIST.
NOT

Page 2291 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–49
TW
(a) Disconnect the T15 ECU connector.
(b) Disconnect the T16 receiver connector.
(c) Measure the resistance according to the value(s) in the

Page 2292 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–50TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(f) Confirm that the ID number on the transmitter and
recorded transmitter ID match.
Result
B
A
(a) Replace the tire pressure warning valve

Page 2293 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–51
TW
(d) Select "TIREPRESS" by following the prompts displayed
on the intelligent tester.
TIRE PRESSURE:
HINT:
*: It may take about 5 to

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–51
TW
(d) Select "TIREPRESS" by following the prompts displayed
on the intelligent tester.
TIRE PRESSURE:
HINT:
*: It may take about 5 to 6 minutes until the values are
displayed.
Result
A
B
(a) Replace the tire pressure warning antenna and receiver
(See page TW-81).
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:
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.*
TIREPRESS3ID3 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.*
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.*
Result Proceed to
All tire pressure readings are equal to specified values. A
Tire pressure values are not displayed. B
END
9REPLACE TIRE PRESSURE WARNING ANTENNA AND RECEIVER
10READ VALUE ON DATA LIST
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.*

Page 2294 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–52TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
HINT:
*: It may take about 5 to 6 minutes until the values are
displayed.
Result
B
A
TIREPRESS2ID2 tire inflation pressure (Absolute
press

Page 2295 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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 o

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

Page 2296 of 3000

TOYOTA SIENNA 2007 Service Repair Manual TW–54TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(f) Rapidly reduce the tire pressure for each wheel at least
40 kPa (0.41 kg/cm
2, 5.8 psi) within 30 seconds. If
"TIREPRESS" disp

TW–54TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(f) Rapidly reduce the tire pressure for each wheel at least
40 kPa (0.41 kg/cm
2, 5.8 psi) within 30 seconds. If
"TIREPRESS" displayed on the tester (ID1 to ID4) does
not change, the tire pressure warning valve and
transmitter corresponds to the DTC that was detected.
HINT:
• Identify the malfunctioning tire pressure warning valve
and transmitter by repeatedly decreasing the tire
pressure for each tire.
• Record which "TIREPRESS" data (ID1 to ID4)
corresponds to each tire.
TIRE PRESSURE:
HINT:
*: It may take about 5 to 6 minutes until the values are
displayed. If the values are not displayed after a few
minutes, perform troubleshooting according to the
inspection procedure for DTCs C2121/21 to C2124/24
(See page TW-42).
(g) Check the DATA LIST.
Result
NOTICE:
• When "TIREPRESS" data has not 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 of
transmitters that are normal.
(h) When the "TIREPRESS" data (ID1 to ID4) has changed,
repeat this procedure to identify the tire pressure
warning valve and transmitter that corresponds to a
DTC.
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.*
TIREPRESS3ID3 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.*
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.*
Condition Detection Condition
One of "TIREPRESS" data (ID1 to ID4) changed. Normal
"TIREPRESS" data did not change. Transmitter corresponding to DTC

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