Toyota Tundra. Manual — part 2770

Fig. 24: No Signal From Transmitter ID - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

NOTE:



When replacing the tire pressure warning ECU, read the IDs stored in the
old ECU using the Techstream and write 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 the

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

1. READ OUTPUT DTC (DTC C2174/74)

a. Turn the ignition switch off.

b. Connect the Techstream to the DLC3.

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

d. Enter the following menus: Chassis/Tire Pressure Monitor/Trouble Codes.

e. Read DTCs.

Result

RESULT TABLE

B: GO TO DTC C2174/74

A: Go to next step

2. CHECK FREQUENCY RECEIVING CONDITION

a. Check if the vehicle is in conditions such as the ones described below:

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 blink
for a minute and turn on 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 the surroundings, or devices installed by the user.

NG: CHECK IF ANY DEVICE IS INSTALLED BY USER

tire pressure warning valve and transmitter has been replaced.

Result

Proceed to

DTC C2174/74 is not output

A

DTC C2174/74 is output

B

NOTE:

When DTC C2174/74 is output, troubleshoot that DTC first. Then
troubleshoot DTCs C2121/21 to C2124/24.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

OK: Go to next step

3. IDENTIFY TRANSMITTER CORRESPONDING TO DTC

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

SYSTEM ).

b. Turn the ignition switch off.

c. Connect the Techstream to the DLC3.

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

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

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

Tire Pressure Monitor

TIRE PRESSURE MONITOR TABLE

Tester

Display

Measurement Item/Range

Normal

Condition

Diagnostic Note

ID1 Tire
Inflation

Pressure

ID1 tire inflation pressure /
min.: Absolute pressure/100 kPa
(1 kgf/cm

2

, 14 psi), Relative

pressure/0 kPa (0 kgf/cm

2

, 0 psi)

max.: Absolute pressure/449.35
kPa (4.5 kgf/cm

2

, 63 psi),

Relative pressure/349.35 kPa
(3.6 kgf/cm

2

, 51 psi)

Actual tire
inflation
pressure

If 100 kPa (1 kgf/cm

2

, 14 psi) for the

absolute pressure or 0 kPa (0

kgf/cm

2

, 0 psi) is displayed for the

relative pressure, the data has not
been received.*

ID2 Tire
Inflation

Pressure

ID2 tire inflation pressure /
min.: Absolute pressure/100 kPa
(1 kgf/cm

2

, 14 psi), Relative

pressure/0 kPa (0 kgf/cm

2

, 0 psi)

max.: Absolute pressure/449.35
kPa (4.5 kgf/cm

2

, 63 psi),

Relative pressure/349.35 kPa
(3.6 kgf/cm

2

, 51 psi)

Actual tire
inflation
pressure

If 100 kPa (1 kgf/cm

2

, 14 psi) for the

absolute pressure or 0 kPa (0
kgf/cm

2

, 0 psi) is displayed for the

relative pressure, the data has not
been received.*

ID3 Tire
Inflation

Pressure

ID3 tire inflation pressure /
min.: Absolute pressure/100 kPa
(1 kgf/cm

2

, 14 psi), Relative

pressure/0 kPa (0 kgf/cm

2

, 0 psi)

max.: Absolute pressure/449.35
kPa (4.5 kgf/cm

2

, 63 psi),

Relative pressure/349.35 kPa
(3.6 kgf/cm

2

, 51 psi)

Actual tire
inflation
pressure

If 100 kPa (1 kgf/cm

2

, 14 psi) for the

absolute pressure or 0 kPa (0
kgf/cm

2

, 0 psi) is displayed for the

relative pressure, the data has not
been received.*

ID4 tire inflation pressure /
min.: Absolute pressure/100 kPa
(1 kgf/cm

2

, 14 psi), Relative

If 100 kPa (1 kgf/cm

2

, 14 psi) for the

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

g. Rapidly reduce the tire pressure for each tire at least 40 kPa (0.4 kgf/cm

2

, 5.8 psi) within 30

seconds.

h. Check the Data List.

i. After confirming that the "ID Tire Inflation Pressure" data for one tire (ID1 to ID4) has changed,

repeat this procedure for the other tires. Identify the transmitter that corresponds to the DTC.

Result

RESULT TABLE

B: Go to step 5

C: END

A: Go to next step

4. CHECK HARNESS AND CONNECTOR (ECU - RECEIVER)

a. Disconnect the J31 ECU connector.

b. Disconnect the P17 receiver connector.

c. Measure the resistance according to the value(s) in the table below.

ID4 Tire
Inflation

Pressure

pressure/0 kPa (0 kgf/cm

2

, 0 psi)

max.: Absolute pressure/449.35
kPa (4.5 kgf/cm

2

, 63 psi),

Relative pressure/349.35 kPa
(3.6 kgf/cm

2

, 51 psi)

Actual tire
inflation
pressure

absolute pressure or 0 kPa (0
kgf/cm

2

, 0 psi) is displayed for the

relative pressure, the data has not
been received.*

HINT:
*: It may take about 5 to 6 minutes until the values are displayed.

NOTE:



It may take about 5 to 6 minutes to display the updated tire
pressure data.



When no "ID Tire Inflation Pressure" data has changed, reset
the tire pressure to the appropriate specified value and rotate
the tire 90 to 270°. Then rapidly release the tire pressure and
recheck it.



Record the "ID Tire Inflation Pressure" data transmitter ID that
corresponds to each tire.

Condition

Proceed to

All abnormal

A

One or more transmitters are abnormal

B

All normal

C

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra