Toyota Tundra. Manual — part 2774

i. When the "ID Tire Inflation Pressure" data (ID1 to ID4) has changed, repeat this procedure to

identify the tire pressure warning valve and transmitter that corresponds to the DTC.

j. When all of the "ID Tire Inflation Pressure" data (ID1 to ID4) has changed, identify the

malfunctioning tire pressure warning valve and transmitter using recorded transmitter IDs and the
output DTC.

k. Set the tire pressures to the appropriate specified value(s) (See TIRE PRESSURE WARNING

SYSTEM ).

2. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER

a. Replace the identified tire pressure warning valve and transmitter with a new one (See

REMOVAL ).

HINT:



Before installing a new tire pressure warning valve and transmitter, read and write down its
transmitter ID.



The transmitter IDs for the tire pressure warning valve and transmitters that are not replaced
should be checked using the Techstream and recorded.

3. REGISTRATION OF TRANSMITTER ID

a. Register the transmitter ID for all wheels (See REGISTRATION ).

4. PERFORM INITIALIZATION

a. Perform INITIALIZATION .

5. CONFIRM TIRE INFLATION PRESSURE (DATA LIST) (See DTC C2126/26 TRANSMITTER

ID NOT RECEIVED IN MAIN MODE )

B : END

A : REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )

DTC C2165/65, C2166/66, C2167/67, C2168/68: ABNORMAL TEMPERATURE INSIDE ID1 TIRE;
ABNORMAL TEMPERATURE INSIDE ID2 TIRE; ABNORMAL TEMPERATURE INSIDE ID3
TIRE; ABNORMAL TEMPERATURE INSIDE ID4 TIRE

DESCRIPTION

Each tire pressure warning valve and transmitter measures the internal temperature of its tire as well as the 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

NOTE:



When "ID Tire Inflation Pressure" data has not changed, reset
the tire pressure to the appropriate specified value and rotate
the tire 90 to 270°. Then forcibly transmit the transmitter ID and
recheck.



Record the transmitter ID and position of transmitters that are
normal.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

malfunction, outputs DTCs, and the tire pressure warning light blinks for 1 minute and then remains on.

DTC DETECTION CONDITION TABLE

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

1. CHECK TIRES

a. Check that the tires are not flat, and have no indication of tire pressure drop.

OK: Tires are normal.

HINT:

If a tire is damaged, the tire pressure warning valve and transmitter may also have been damaged at
the same time.

NG: REPLACE TIRE AND TIRE PRESSURE WARNING VALVE AND TRANSMITTER

OK: Go to next step

2. IDENTIFY TRANSMITTER CORRESPONDING TO DTC (See DTC C2141/41, C2142/42,

C2143/43, C2144/44: TRANSMITTER ID1 ERROR; TRANSMITTER ID2 ERROR;
TRANSMITTER ID3 ERROR; TRANSMITTER ID4 ERROR )

3. REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER

a. Replace the identified tire pressure warning valve and transmitter with a new one (See

REMOVAL ).

DTC

Code

DTC Detection Condition

Trouble Area

C2165/65
C2166/66
C2167/67
C2168/68

Temperature inside the tire exceeds 119°C (246.2°F)
more than a specified times.



Tires



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

NOTE:



When replacing the tire pressure warning ECU, read the transmitter IDs
stored in the old ECU using the Techstream and note them down before
removal.



It is necessary to perform INITIALIZATION after REGISTRATION of the
transmitter IDs into the tire pressure warning ECU after the ECU and/or
valve and transmitter has been replaced.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

HINT:



Before installing a new tire pressure warning valve and transmitter, read and write down its
transmitter ID.



The transmitter IDs for the tire pressure warning valve and transmitters that are not replaced
should be checked using the Techstream and recorded.

4. REGISTRATION OF TRANSMITTER ID

a. Register the transmitter ID for all 4 tires (See REGISTRATION ).

5. PERFORM INITIALIZATION

a. Perform INITIALIZATION .

6. CONFIRM TIRE INFLATION PRESSURE (DATA LIST) (See DTC C2126/26: TRANSMITTER

ID NOT RECEIVED IN MAIN MODE )

B: END

A: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )

DTC C2171/71: TRANSMITTER ID NOT REGISTERED

DESCRIPTION

The transmitter IDs of each tire pressure warning valve and transmitter are registered to the tire pressure
warning ECU.

When the IDs have never been registered, a DTC is output.

DTC DETECTION CONDITION TABLE

INSPECTION PROCEDURE

1. CONFIRM REGISTRATION CONDITION (REGISTERED TRANSMITTER IDS)

a. Turn the ignition switch off.

b. Connect the Techstream to the DLC3.

DTC

Code

DTC Detection Condition

Trouble Area

C2171/71

Transmitter ID is not registered. (When a transmitter ID is unregistered
for 3 minutes or more)

Tire pressure warning
ECU

NOTE:



When replacing the tire pressure warning ECU, read the transmitter IDs
stored in the old ECU using the Techstream and note them down before
removal.



It is necessary to perform INITIALIZATION after REGISTRATION of the
transmitter IDs into the tire pressure warning ECU after the ECU has been
replaced.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

c. Turn the ignition switch to ON and the Techstream on.

d. Enter the following menus: Chassis/Tire Pressure Monitor/Data List.

e. Check the values by referring to the table below.

Tire Pressure Monitor

TIRE PRESSURE MONITOR TABLE

OK: The registered transmitter IDs are displayed on the Techstream screen.

NG: Go to step 2

OK: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )

2. PERFORM REGISTRATION (TRANSMITTER ID)

a. Register the transmitter IDs for all the wheels (See REGISTRATION ).

3. PERFORM INITIALIZATION

a. Perform INITIALIZATION .

4. CONFIRM TIRE INFLATION PRESSURE (DATA LIST) (See DTC C2126/26 TRANSMITTER

ID NOT RECEIVED IN MAIN MODE )

B: END

A: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )

DTC C2174/74, C2191/91: VEHICLE SPEED SIGNAL MALFUNCTION; VEHICLE SPEED SIGNAL
ERROR (TEST MODE DTC)

Tester

Display

Measurement

Item/Display

Normal Condition

Diagnostic Note

Registered

ID1 Code

Registered ID1
code/
min.: 0
max.: FFFFFFFF*

The transmitter ID registered in
the transmitter ID1 is displayed

*: Displayed only when the
transmitter ID is not
registered.

Registered

ID2 Code

Registered ID2
code/
min.: 0
max.: FFFFFFFF*

The transmitter ID registered in
the transmitter ID2 is displayed

*: Displayed only when the
transmitter ID is not
registered.

Registered

ID3 Code

Registered ID3
code/
min.: 0
max.: FFFFFFFF*

The transmitter ID registered in
the transmitter ID3 is displayed

*: Displayed only when the
transmitter ID is not
registered.

Registered

ID4 Code

Registered ID4
code/
min.: 0
max.: FFFFFFFF*

The transmitter ID registered in
the transmitter ID4 is displayed

*: Displayed only when the
transmitter ID is not
registered.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra