Toyota Tundra. Manual — part 122

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 5 tires have been received.

The initialization process is canceled if the ignition switch is turned to OFF position during initialization. To
initialize again, the tire pressure warning reset switch must be pressed again. For this reason, once the tire
pressure warning reset switch has been pressed, turning ignition switch to OFF position is not recommended for
a minimum of 20 minutes.

1. Set the tire pressure of all wheels (including spare tire) to pressure specified on the tire and loading

information label.

2. With the vehicle stopped and parking brake applied, turn the ignition switch to the ON position.

3. Press and hold the tire pressure warning reset switch until the tire pressure warning light blinks 3 times at

one-second intervals. See Fig. 16.

4. Confirm that initialization is complete using the intelligent tester. Check that the pressure for each tire is

displayed in INIT THRESHOLD 1 to 5.

CAUTION: DO NOT push the reset switch without adjusting tire inflation pressure of

all 5 tires (including the spare). Otherwise, the low tire pressure warning
light may not come on even if the tire pressure is low, or it may come on
when the tire inflation pressure is actually normal. If you push the reset
switch while the vehicle is moving, initialization is not performed.

NOTE:

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

NOTE:

Do not turn the ignition switch to OFF position during initialization (the
initialization process takes about 20 minutes). Initialization will be
complete if signals are received from all the wheels including the spare.
Initialization will be canceled if the ignition switch is turned to OFF
position during initialization.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 16: Locating TPM System Reset Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

TPMS RESET - PROCEDURE 8

Initializing Tire Pressure Monitor System

NOTE:

This system requires initializing after changing tires or wheels, after rotating the
tires, or if warning light blinks once every 3 seconds. Set tire pressure within
the specified range before initializing. If the tire air pressure is not within the
specified range, tire pressure warning system will not function. See
INITIALIZING TIRE PRESSURE MONITOR SYSTEM.

CAUTION: DO NOT push the reset switch without adjusting tire inflation pressure.

Otherwise, the low tire pressure warning light may not come on even if the
tire pressure is low, or it may come on when the tire inflation pressure is
actually normal. If you push the reset switch while the vehicle is moving,
initialization is not performed.

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. With vehicle stopped and parking brake applied, turn ignition switch to ON position.

3. Press and hold the tire pressure warning reset switch until the tire pressure warning light blinks 3 times at

one-second intervals. See Fig. 17.

4. Drive the vehicle at 19 MPH (30 KM/H) or more to complete the initialization of the skid control ECU (it

takes more than one hour). Vehicle should be driven under the following conditions:



The vehicle speed is between 31-62 MPH (50-100 KM/H).



The roads are dry, smooth and straight.



The number of passengers is 1 or 2 (including driver).

5. After initialization is completed, the skid control ECU monitors the tire pressure by using the wheel speed

sensors.

6. To verify the system has been initialized, check the length of time the tire pressure warning light is on

after turning the ignition switch to the ON position. Light will stay on for 3 seconds if system is
initialized, or 4 seconds if system is not initialized.

NOTE:

If the tire pressure warning light does not blink, turn ignition switch to OFF
position and perform the initialization procedure again starting at step 2. If
light still does not blink, there is a problem in the TPM system. See
appropriate manufacturer service information.

NOTE:

If the tire pressure warning light repeats a cycle of ON (0.5 second) and
OFF (2.5 seconds) while the vehicle is being driven, initialization may have
failed. If so, turn ignition switch to OFF position and perform the
initialization procedure again starting at step 1.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 17: Locating TPM System Reset Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

TPMS RESET - PROCEDURE 9

Initializing Tire Pressure Monitor System

NOTE:

The system will need to be initialized when tires are replaced with tires of
different pressures; tire pressure sensor and/or tire pressure monitor ECU are
replaced; or when a new vehicle is delivered. Set tire pressure within the
specified range before initializing. When a tire pressure sensor and/or tire
pressure monitor ECU are replaced, the sensor ID must be memorized by the
tire pressure monitor ECU prior to system initialization. See TIRE PRESSURE
SENSOR REGISTRATION.

CAUTION: Set tire pressure within the specified range before initializing. DO NOT

push the reset switch without adjusting tire inflation pressure of all 4 tires.
Otherwise, the low tire pressure warning light may not come on even if the
tire pressure is low, or it may come on when the tire inflation pressure is
actually normal. If you push the reset switch while the vehicle is moving,
initialization is not performed.

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).

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota