Toyota Tundra. Manual — part 126

During initialization, the tire pressure monitor valve sub-assembly measures the inflation pressure of the tires,
and registers the signals that are transmitted into the tire pressure monitor ECU at a frequency of one per
minute. The initialization process is completed when the signals from the 4 tires have been received.

The initialization process is canceled if the ignition switch is turned to OFF position prior to the completion of
initialization. To restart initialization, the tire pressure warning reset switch must be pressed again.

1. Set the tire pressure of all wheels to pressure specified on the tire and loading information label.

2. With the vehicle parked in a safe place, connect the intelligent tester to the DLC3 and turn POWER

switch to the ON position.

3. Turn the intelligent tester ON and navigate to the "TIREPRESS" option using the on-screen prompts.

4. Within 30 seconds of turning the ignition ON, press and hold the tire pressure warning reset switch

(located to the left of the steering wheel) until the tire pressure warning light blinks 3 times at one-second
intervals.

5. Wait 5 - 6 minutes, with the ignition ON, for the initialization process to complete. If the initialization has

not been completed successfully, Diagnostic Trouble Code (DTC) C2177/77 is set in the tire pressure
monitor ECU about 20 minutes after driving starts.

6. Confirm that initialization is complete by verifying that the correct tire pressure values are displayed on

the intelligent tester.

Tire Pressure Sensor Registration

tire pressure monitor ECU prior to system initialization. See TIRE PRESSURE
SENSOR REGISTRATION.

NOTE:

When initializing the system, the present tire condition is stored as a standard.

NOTE:

Perform the tire pressure adjustment after the vehicle has sufficiently cooled
down. If it hasn't sufficiently cooled, increase the air pressure in the tires
approximately 3-4psi (20-30kPa)

NOTE:

The initialization mode can be terminated by making a short circuit between
terminals No. 4 and 13 of the DLC3 connector (located under left side of
instrument panel).

NOTE:

In winter, tire pressure may decrease due to low ambient temperatures
(about 1.45 psi (10 kPa) for every 18°F (10°C) drop in 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 so that they are in the specified
range under cold conditions. With this adjustment, unnecessary warnings
are less likely.

NOTE:

When a tire pressure sensor and/or tire pressure monitor ECU are replaced, the

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

1. Set the tire pressure of all wheels to pressure specified on the tire and loading information label.

2. Connect the intelligent tester (with CAN VIM) to DLC3. See Fig. 18.

3. Turn the ignition switch to ON position.

4. Select the "REGIST TIRE" mode (UTILITY - REGIST TIRE).

5. Input the transmitter ID(s) (ID1 to ID4), using the intelligent tester, and transmit them to the tire pressure

warning ECU. See Fig. 24 and Fig. 25 .

6. Set the ID transmission condition to "ID REGISTRATION COMPLETE".

7. Turn ignition switch to OFF position.

8. Turn ignition switch to ON position. Select the "TIRE PRESS" mode on the intelligent tester.

9. Confirm that the tire pressure data is displayed for all 4 tires on the intelligent tester. This will confirm

that the registration has been completed successfully.

sensor ID must be memorized by the tire pressure monitor ECU prior to system
initialization. To perform this procedure, a Toyota intelligent tester (with CAN
VIM) must be used. It is not necessary to register the sensor ID(s) when only tire
rotation is performed.

NOTE:

Before beginning registration process on vehicles where tire pressure sensors
have not been replaced, retrieve sensor transmitter ID(s) using intelligent tester
or by reading the ID on the tire pressure sensor. If sensor is being replaced with
a new one, make a note of the 8-digit number (transmitter ID) before installation,
as it cannot be seen after sensor is installed.

NOTE:

Any previously registered ID(s) will be deleted from the memory when the
registration is completed.

NOTE:

If steps 4-6 are not completed within 5 minutes, the mode will return to the
normal operation mode.

NOTE:

It may take 5 - 6 minutes to update the tire pressure data.

NOTE:

If the ID(s) have not been registered, DTC C2171/71 is set in the tire
pressure monitor ECU after about 3 minutes.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 24: Registering Transmitter ID Using Intelligent Tester (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 25: Registering Transmitter ID Using Intelligent Tester (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota