2007 TOYOTA SIENNA tire pressure reset

TW–68TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
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).
(f) Rapidly reduce the tire pressure for each wheel at least
40 kPa (0.4 kg/cm
2, 5.8 psi) within 30 seconds.
(g) Check the DATA LIST.
NOTICE:
• It takes about 5 to 6 minutes to display the
updated tire pressure data.
• When no "TIREPRESS" data has changed, reset
the tire pressure to the appropriate specified
value and rotate the tire 90 to 270 degrees. Then
rapidly release the tire pressure and recheck it.
• Record the transmitter ID of which "TIREPRESS"
data corresponds to each tire.
(h) After confirming that one of "TIREPRESS" data for one
tire (ID1 to ID4) has changed, repeat this procedure one
by one. Identify the transmitter that corresponds to a
DTC.
Result
A
B
C
TIREPRESS2ID2 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.*
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.* Tester Display Measurement Item/Range Normal Condition Diagnostic Note
Result Proceed to
One or more of transmitters abnormal A
All normal B
All abnormal C
Go to step 4
END

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–75
TW
DESCRIPTION
The ECU enters the initialization mode and performs initialization automatically, when the tire pressure
warning ECU receives the signal from the tire pressure warning reset switch. If the ECU receives the
signal, the tire pressure warning light blinks 3 times (1 second on, 1 second off).
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Perform the tire pressure warning reset switch test in
TEST MODE PROCEDURE (See page TW-25).
OK:
Reset switch ON:
Tire pressure warning light comes on.
Reset switch OFF:
Tire pressure warning light blinks.
NG
OK
Tire Pressure Warning Reset Switch Circuit
1CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION
C148712E07
Go to step 2
END

TW–76TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(a) Disconnect the tire pressure warning reset switch
connector.
(b) Measure the resistance between terminals 1 and 2 of the
tire pressure warning reset switch when the tire pressure
warning switch is ON and OFF.
Standard resistance
NG
OK
(a) Disconnect the tire pressure warning reset switch T4
connector and tire pressure warning ECU T15
connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
NG
OK
2INSPECT TIRE PRESSURE WARNING RESET SWITCH
C107260E13
Tester Connection Switch Condition Specified Condition
1 - 2 ON Below 1
1 - 2 OFF 10 k or higher
REPLACE TIRE PRESSURE WARNING
RESET SWITCH (See page TW-91)
3CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SW - TIRE
PRESSURE WARNING ECU)
C159185E02
Tester Connection Switch Condition Specified Condition
T15-1 (CLSW) - T4-1
AlwaysBelow 1
T15-1 (CLSW) - Body
ground10 k or higher
T4-2 - Body ground Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR
REPLACE TIRE PRESSURE WARNING ECU (See page TW-87)

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

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.*

TW–28TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
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

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–29
TW
(d) Select the SIGNAL CHECK on the intelligent tester.
HINT:
Every time the test mode DTC clear conditions are
satisfied, the tire pressure warning light comes on
for 1 second. Then, the tire pressure warning light
blinks at 0.125-second intervals.
(e) Drive the vehicle at 12 mph (20 km/h) or more for 10
seconds or more to check the vehicle speed signal
(C2191/91).
(f) Loosen the valve core and rapidly reduce the
pressure (at least 40 kPa (0.41 kg/cm
2, 5.8 psi)
within 30 seconds or more) to check the transmitter
data (C2181/81 to C2184/84).
HINT:
The transmitter ID can be transmitted by rapidly
reducing the tire pressure.
(g) Check that the tire pressure warning system test
mode DTCs are erased.
(h) Check the tire pressure warning reset switch.
(1) Press the tire pressure warning reset switch.
C110644
Test Mode DTC Test Signal Test Mode DTC Clear Condition
C2181/81 to C2184/84 Transmitter DataData is received from the transmitter which has a registered ID in
the tire pressure warning ECU
C2191/91 Vehicle Speed SignalVehicle speed of 12 mph (20 km/h) or more is detected for 3
seconds or more

TW–30TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(2) Check the tire pressure warning indicator light.
(i) Result
HINT:
After the signal check is completed, check for a
signal check DTC to confirm the system status.
(j) End of SIGNAL CHECK
After completing the test mode (SIGNAL CHECK),
turn the ignition switch off and disconnect the tester.
DTC of SIGNAL CHECK (TEST DIAGNOSIS)
function:
If a trouble code is displayed during the test mode
DTC check, check the circuit listed for that code. For
details of each code, refer to the relevant page listed
under respective "DTC No." in the chart.
Test Signal Normal Condition
Tire Pressure Warning Reset Switch• Switch ON: TPWS indicator comes on
• Switch OFF: TPWS indicator blinks at 0.125
Condition Procedure
SIGNAL CHECK DTC is output Repair the faulty part and enter SIGNAL CHECK again
SIGNAL CHECK DTCs are cleared No problem
DTC No. Detection Item Trouble Area See procedure
C2181/81 Transmitter ID1 not received• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECUTW-42
C2182/82 Transmitter ID2 not received• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECUTW-42
C2183/83 Transmitter ID3 not received• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECUTW-42
C2184/84 Transmitter ID4 not received• Tire pressure warning valve and transmitter
• Tire pressure warning antenna and receiver
• Wire harness or connector
• Tire pressure warning ECUTW-42
C2191/91 Vehicle speed signal error• Vehicle speed sensor
• Combination meter assembly
• Wire harness or connector
• Tire pressure warning ECUTW-70