Toyota Tundra. Manual — part 2769



Tire pressure warning ECU

C2141/41

Transmitter ID1 Error



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2142/42

Transmitter 1D2 Error



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2143/43

Transmitter ID3 Error



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2144/44

Transmitter ID4 Error



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2165/65

Abnormal Temperature Inside ID1
Tire



Tires



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2166/66

Abnormal Temperature Inside ID2
Tire



Tires



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2167/67

Abnormal Temperature Inside ID3
Tire



Tires



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2168/68

Abnormal Temperature Inside ID4
Tire



Tires



Tire pressure warning valve
and transmitter



Tire pressure warning ECU

C2171/71

Transmitter ID not Registered

Tire pressure warning ECU

C2174/74

Vehicle Speed Signal Malfunction



Combination meter



Vehicle speed signal circuit



Harness or connector



Tire pressure warning ECU



Tire pressure warning valve
and transmitter

C2176/76

Receiver Error

Tire pressure warning ECU



Tire pressure warning valve

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

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

C2177/77

Initialization not Completed

and transmitter



Tire pressure warning
antenna and receiver



Tire pressure warning ECU



Harness or connector

C2178/78

Battery Voltage Malfunction



Battery



Charging system



Tire pressure warning ECU

C2181/81

Transmitter ID1 not Received
(Test Mode DTC)



Tire pressure warning valve
and transmitter



Tire pressure warning
antenna and receiver



Harness or connector



Tire pressure warning ECU

C2182/82

Transmitter ID2 not Received
(Test Mode DTC)



Tire pressure warning valve
and transmitter



Tire pressure warning
antenna and receiver



Harness or connector



Tire pressure warning ECU

C2183/83

Transmitter ID3 not Received
(Test Mode DTC)



Tire pressure warning valve
and transmitter



Tire pressure warning
antenna and receiver



Harness or connector



Tire pressure warning ECU

C2184/84

Transmitter ID4 not Received
(Test Mode DTC)



Tire pressure warning valve
and transmitter



Tire pressure warning
antenna and receiver



Harness or connector



Tire pressure warning ECU

C2191/91

Vehicle Speed Signal Error (Test
Mode DTC)



Combination meter



Vehicle speed signal circuit



Harness or connector



Tire pressure warning ECU

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

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)

DESCRIPTION

The tire pressure warning valves and transmitters that are installed in the tire and wheel assemblies measure the
tire pressure of the tires. The measured values 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. The ECU compares the measured
tire pressure values with the tire pressure threshold. When the measured tire pressure value is less than this
threshold, the warning light in the combination meter turns on. The tire pressure warning valve and transmitters
constantly send radio waves to the tire pressure warning antenna and receiver.

Under the conditions below, the tire pressure warning antenna and receiver is unable to receive the signals from
the tire pressure warning valves and transmitters, and a DTC is stored.



Facilities or devices that use similar radio frequencies are located in the vicinity of the vehicle.



Devices using similar radio frequencies are used in the vehicle.



The ID of the tire pressure warning valve and transmitter is mistyped during registration.



A tire/wheel/transmitter from a different vehicle is installed.



The parts, such as tire chains, window film which obstruct the radio signal of the tire pressure warning
valve and transmitter.

HINT:

These DTCs are detected when the vehicle is driven and no signals are received for 20 minutes or more. DTCs
from C2121/21 to C2124/24 can only be cleared by using the tester or receiving the signal from the tire pressure
warning valve and transmitter. DTCs from C2181/81 to C2184/84 can be cleared when the transmitter in the tire
pressure warning valve and transmitter sends a forced transmission signal or test mode ends. DTCs from
C2181/81 to C2184/84 are output only in test mode.

DTC DETECTION CONDITION TABLE

DTC

Code

DTC Detection Condition

Trouble Area

C2121/21
C2122/22
C2123/23
C2124/24

When all conditions below are met:



Tire pressure warning valve and transmitter is not in stop
mode



Signal is not received from tire pressure warning valve and
transmitter when driving the vehicle at more than 8 km/h
(5 mph) for 20 minutes or more



Tire pressure warning
valve and transmitter



Tire pressure warning
antenna and receiver



Harness or connector



Tire pressure warning
ECU

C2181/81
C2182/82

Test mode procedure is performed.



Tire pressure warning
valve and transmitter



Tire pressure warning
antenna and receiver

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra

HINT:

It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is
malfunctioning because it cannot be identified by the output DTC.

WIRING DIAGRAM

C2183/83
C2184/84



Harness or connector



Tire pressure warning
ECU

2009 Toyota Tundra

2009 SUSPENSION Tire & Wheel - Tundra