Toyota Tundra. Manual — part 2776

RESULT TABLE

B: REPLACE COMBINATION METER (See OIL PRESSURE RECEIVER GAUGE
MALFUNCTION )

A: Go to next step

6. REPLACE TIRE PRESSURE WARNING ECU

a. Replace the tire pressure warning ECU (See REMOVAL ).

7. PERFORM REGISTRATION OF TRANSMITTER ID

a. Perform REGISTRATION ).

8. PERFORM INITIALIZATION

a. Perform INITIALIZATION ).

9. CHECK DTC

a. Perform a driving test.

b. Check for DTCs.

HINT:

The time required for DTC C2174 to be stored is 20 minutes.

Result

RESULT TABLE

B: END

A: REPLACE TIRE PRESSURE WARNING VALVE AND TRANSMITTER (See REMOVAL )

DTC C2176/76: RECEIVER ERROR

DESCRIPTION

The signals are transmitted to the tire pressure warning antenna and receiver on the body as radio waves and
then sent to the tire pressure warning ECU.

DTC DETECTION CONDITION TABLE

Result

Proceed to

DTC P0500 is not output

A

DTC P0500 is output

B

Result

Proceed to

DTC C2174 is output

A

DTC C2174 is not output

B

DTC Code

DTC Detection Condition

Trouble Area

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

INSPECTION PROCEDURE

1. CLEAR DTC

a. Clear the DTC (See DTC CHECK/CLEAR ).

b. Turn the ignition switch off.

2. CHECK DTC

a. Check for DTC.

Result

RESULT TABLE

B: USE SIMULATION METHOD TO CHECK (See HOW TO PROCEED WITH
TROUBLESHOOTING )

A: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )

DTC C2177/77: INITIALIZATION NOT COMPLETED

DESCRIPTION

Initialization is necessary if one of the following occurs: 1) the ECU is replaced; 2) the tire pressure warning
valve and transmitter is replaced; 3) tires with a different tire standard pressure are installed; 4) the tires are
rotated; or 5) a new vehicle is delivered.

DTC DETECTION CONDITION TABLE

C2176/76 Malfunction in the tire pressure warning ECU internal circuit.

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 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 has been
replaced.

Result

Proceed to

DTC C2176 is output

A

DTC C2176 is not output

B

DTC

Code

DTC Detection Condition

Trouble Area

C2177/77

When all conditions below are met:



During initialization



Signal is not received from tire pressure warning



Tire pressure warning
valve and transmitter



Tire pressure warning
antenna and receiver

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

WIRING DIAGRAM

Fig. 31: Tire Pressure Warning & Antenna Receiver - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

valve and transmitter for 20 minutes or more



Vehicle speed is more than 8 km/h (5 mph) for a total
of 20 minutes



Tire pressure warning ECU



Harness or connector

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

INSPECTION PROCEDURE

1. 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 surroundings or devices installed by the user.

NG: CHECK IF ANY DEVICE IS INSTALLED BY USER

OK: Go to next step

2. PERFORM INITIALIZATION

a. Perform INITIALIZATION .

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

ID NOT RECEIVED IN MAIN MODE )

B: END

A: GO TO C2121/21 TO C2124/24 FLOWCHART (See DTC C2121/21, C2122/22, C2123/23,
C2124/24, C2181/81, C2182/82, C2183/83, C2184/84: NO SIGNAL FROM TRANSMITTER ID1;
NO SIGNAL FROM TRANSMITTER ID2; NO SIGNAL FROM TRANSMITTER ID3; NO
SIGNAL FROM TRANSMITTER ID4; TRANSMITTER ID1 NOT RECEIVED (TEST MODE
DTC); TRANSMITTER ID2 NOT RECEIVED (TEST MODE DTC); TRANSMITTER ID3 NOT
RECEIVED (TEST MODE DTC); TRANSMITTER ID4 NOT RECEIVED (TEST MODE DTC) ).

NOTE:



When replacing the tire pressure warning ECU, read the transmitter 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
valve and transmitter has been replaced.

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra