Toyota Tundra. Manual — part 123

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 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 to pressure specified on the tire and loading information label.

2. With the vehicle parked in a safe place and hybrid system turned off, turn the POWER switch to the IG-

ON position.

3. Press and hold the tire pressure warning reset switch (located under steering wheel) until the tire pressure

warning light blinks 3 times at one-second intervals.

4. After 2-3 minutes, the initialization process should be completed. 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.

5. Confirm that initialization is complete using the intelligent tester. This may be done by checking for the

test DTCS (C2181/81 to C2191/91) to be indicated, or by ensuring that tire pressure values can be
displayed on the tester (it can take 2-3 minutes to display tire pressure data).

Tire Pressure Sensor Registration

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.

NOTE:

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

NOTE:

If outside temperatures are very low (such as in winter), which can cause
decreases in tire pressure, leave ignition on for about 20 minute after
confirmation that initialization has been completed, and increase the tire
inflation pressure by 3-4 psi (20-30 kPa).

NOTE:

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. To perform this procedure, a Toyota intelligent tester (with CAN
VIM) must be used. It is not necessary to register the sensor IDs when only tire
rotation is performed.

NOTE:

Before beginning registration process on vehicles where tire pressure sensors
have not been replaced, retrieve sensor transmitter IDs 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 7-digit number (transmitter ID) before installation,
as it cannot be seen after sensor is installed. See Fig. 19.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 18: Connecting Intelligent Tester (With CAN VIM)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. Turn the ignition switch to ON position.

4. Read and record the transmitter IDs (ID1 to ID4) by using the DATA LIST. See Fig. 19 and Fig. 20 .

5. Select the "REGIST TIRE" mode.

6. Select the "MAIN" registration mode.

7. Input the transmitter IDs (ID1 to ID4) using the intelligent tester and transmit it to the tire pressure

monitor ECU.

8. Set ID transmission condition to "SUCCEEDED".

9. When intelligent tester confirms that ID registration has successfully been completed, turn ignition switch

to OFF position.

10. Turn ignition switch to ON position. Select the "SIGNAL CHECK" mode on the intelligent tester.

11. Confirm that the transmitter IDs and the tire pressure data is displayed for all 4 tires on the intelligent

tester.

NOTE:

The previously registered IDs will be deleted from the memory when the
registration is completed.

NOTE:

If steps 4-8 are not completed within 5 minutes, the mode will return to the
normal operation mode.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

NOTE:

It may take up to one minute to update the tire pressure data.

NOTE:

If the IDs have not been registered, DTC C2171/71 is set in the tire
pressure monitor ECU after about 60 minutes.

2009 Toyota Tundra

GENERAL INFORMATION Service Reminder Indicators - Toyota

Fig. 19: 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