TOYOTA SIENNA 2007 Service Repair Manual

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–19
TW
HOW TO PROCEED WITH
TROUBLESHOOTING
HINT:
• Use the following procedures to troubleshoot the tire
pressure warning system.
• *: Use the intelligent tester.
NEXT
(a) Interview the customer to confirm the trouble.
HINT:
It is important to collect as much specific information as
possible from the customer to allow for a quick repair.
NEXT
(a) Adjust all tire pressures to the standard values.
Result
A
B
(a) Check for DTCs (See page TW-34).
Result
B
A
(a) Refer to DIAGNOSTIC TROUBLE CODE CHART (See
page TW-37).
1VEHICLE BROUGHT TO WORKSHOP
2CUSTOMER PROBLEM ANALYSIS
3ADJUST TIRE PRESSURE
Condition Proceed to
Tire pressure warning light goes off A
Tire pressure warning light remains on B
Go to step 9
4CHECK FOR DTC*
Result Proceed to
DTC is output A
DTC is not output B
Go to step 6
5DTC CHART

TW–20TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
NEXT
(a) Refer to PROBLEM SYMPTOMS TABLE (See page TW-
28).
NEXT
(a) Refer to ELECTRONIC CIRCUIT INSPECTION
PROCEDURE (See page IN-30).
NEXT
(a) Repair or replace parts based on the diagnosis result.
NEXT
(a) Check the DATA LIST to confirm that the tire inflation
pressure has been received (See page TW-35).
(b) Perform initialization (See page TW-23).
(c) Confirm that the initialization has been completed.
NEXT Go to step 7
6PROBLEM SYMPTOMS TABLE
7CIRCUIT INSPECTION*
8REPAIR OR REPLACE
9CONFIRMATION TEST
END

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.*

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–27
TW
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

TW–40TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If a trouble code is displayed during the DTC check, inspect
the circuit listed for that code. For details of each code, refer
to the relevant page listed under respective "DTC No." in the
DTC chart.
TIRE PRESSURE WARNING SYSTEM:
DTC Code Detection Item Trouble Area See page
C2111/11 Transmitter ID1 Operation Stop 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-39
C2112/12 Transmitter ID2 Operation Stop 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-39
C2113/13 Transmitter ID3 Operation Stop 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-39
C2114/14 Transmitter ID4 Operation Stop 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-39
C2121/21 No Signal from Transmitter ID1 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2122/22 No Signal from Transmitter ID2 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2123/23 No Signal from Transmitter ID3 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2124/24 No Signal from Transmitter ID4 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2141/41 Transmitter ID1 Error 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-50
C2142/42 Transmitter ID2 Error 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-50
C2143/43 Transmitter ID3 Error 1. Tire pressure warning valve
and transmitter
2. Tire pressure waning ECUTW-50
C2144/44 Transmitter ID4 Error 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECUTW-50
C2165/65 Abnormal Temperature Inside ID1
Tire1. Tires
2. Tire pressure warning valve
and transmitter
3. Tire pressure warning ECUTW-54

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–41
TW
C2166/66 Abnormal Temperature Inside ID2
Tire1. Tires
2. Tire pressure warning valve
and transmitter
3. Tire pressure warning ECUTW-54
C2167/67 Abnormal Temperature Inside ID3
Tire1. Tires
2. Tire pressure warning valve
and transmitter
3. Tire pressure warning ECUTW-54
C2168/68 Abnormal Temperature Inside ID4
Tire1. Tires
2. Tire pressure warning valve
and transmitter
3. Tire pressure warning ECUTW-54
C2171/71 Transmitter ID not Registered Tire pressure warning ECUTW-58
C2176/76 Receiver Error 1. Tire pressure warning antenna
and receiver
2. Wire harness or connector
3. Tire pressure warning ECUTW-60
C2177/77 Initialization not Completed 1. Tire pressure warning valve
and transmitter
2. Tire pressure warning ECU
3. Tire pressure warning antenna
and receiver
4. Wire harness or connectorTW-63
C2181/81 Transmitter ID1 not Received
(Test Mode DTC)1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2182/82 Transmitter ID2 not Received
(Test Mode DTC)1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2183/83 Transmitter ID3 not Received
(Test Mode DTC)1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2184/84 Transmitter ID4 not Received
(Test Mode DTC)1. Tire pressure warning valve
and transmitter
2. Tire pressure warning antenna
and receiver
3. Wire harness or connector
4. Tire pressure warning ECUTW-42
C2191/91 Vehicle Speed Signal Error (Test
Mode DTC)1. Vehicle speed sensor
2. Tire pressure warning ECU
3. Combination meter
4. Wire harness or connectorTW-70 DTC Code Detection Item Trouble Area See page

TW–10TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
TIRE PRESSURE WARNING
SYSTEM
PRECAUTION
1. TIRE PRESSURE WARNING SYSTEM PRECAUTION
(a) When the tire pressure warning light comes on,
immediately check the tire pressure of the tire and
adjust it to the specified value. (The tire pressure
warning light will come on after blinking for 1 minute
if there is an open in the tire pressure warning light
circuit.)
Cold tire inflation pressure
(b) When the tire pressure warning light comes on after
blinking for 1 minute, there is a malfunction in the
system. Check for DTCs.
(c) It is necessary to register the transmitter ID in the
tire pressure warning ECU after replacing the tire
pressure warning valve and transmitter and/or tire
pressure warning ECU (See page TW-20).
(d) When replacing the tire pressure warning ECU:
(1) Using the DATA LIST, read the transmitter IDs
registered in the ECU and make a note of them
before removing the tire pressure warning ECU.
(2) Register the transmitter IDs after installing a new
tire pressure warning ECU.
C159176E01
Tire Size
kPa (kgf/cm2, psi)
215/65R16
240 (2.4, 35)
225/60R17

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–11
TW
(e) When replacing the tire pressure warning valve and
transmitter:
(1) Take a note of the 8-digit number (transmitter ID)
written on the new tire pressure warning valve
and transmitter when replacing it. Register the
transmitter IDs in the tire pressure warning ECU
after replacing the tire pressure warning valve
and transmitter and installing the tires and
wheels on the vehicle.
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. In
order to register IDs, all 4 IDs for the vehicle
are necessary.
(f) When replacing the tire pressure warning ECU and
the tire pressure warning valves and transmitters, it
is necessary to perform the initialization (See page
TW-23) after the registration (See page TW-20).
(g) Precautions about the tire pressure:
• The tire pressures decrease naturally.
• In winter, tire pressure may decrease due to low
ambient temperatures (tire pressure decreases
by approximately 10 kPa (0.1 kgf/cm
2, 1.45 psi)
for every 10
C (50F) drop in the ambient
temperature). Therefore, the tire pressure
warning is more likely to operate if the tire
pressures are not adjusted appropriately. If the
daily temperature variation is large, pressurize
the tires high so that the tire pressures are
suitable under cold conditions. Incorrect tire
pressure warning operation becomes less likely.
C159177E01

TW–12TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
2. IN CASE OF TIRE AND WHEEL REPLACEMENT
(a) When tires and wheels are replaced, always ensure
that each transmitter ID is correctly registered.
3. IN CASE OF REPLACEMENT OF TIRE PRESSURE
WARNING ECU, TIRE PRESSURE WARNING VALVE
AND TRANSMITTER, OR TIRE(S) WITH DIFFERENT
TIRE PRESSURE
(a) Initialize the tire pressure warning system after any
of the following is performed:
• Replacing the tire pressure warning ECU or the
tire pressure warning valve and transmitter.
• Installing tire(s) which require different tire
pressure.
• Changing the tire inflation pressure by changing
traveling speed or load weight, etc.
HINT:
The tire pressure warning system will not operate
properly if it is not initialized (See page TW-23).
4. FAIL-SAFE FUNCTION
(a) When a system malfunction occurs in the tire
pressure warning system, the tire pressure warning
light comes on after blinking for 1 minute and
informs the driver of the system failure.
(b) The result of this diagnosis is stored in the tire
pressure warning ECU.
5. CHECK TIRE PRESSURE AFTER REPAIRS
(a) After repairs, confirm that the actual tire pressures
are displayed in DATA LIST (See page TW-35).