C2125

DTC C2121/21 No Signal from Transmitter ID1
DTC C2122/22 No Signal from Transmitter ID2
DTC C2123/23 No Signal from Transmitter ID3
DTC C2124/24 No Signal from Transmitter ID4
DTC C2125/25 No Signal from Transmitter ID5
DTC C2181/81 Transmitter ID1 not Received (Test Mode DTC)
DTC C2182/82 Transmitter ID2 not Received (Test Mode DTC)
DTC C2183/83 Transmitter ID3 not Received (Test Mode DTC)
DTC C2184/84 Transmitter ID4 not Received (Test Mode DTC)
DTC C2185/85 Transmitter ID5 not Received (Test Mode DTC)

DESCRIPTION
Tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the air pressures 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 air pressure values with the air pressure threshold. When the measured air pressure values are less than this threshold, the warning light in the combination meter comes on. The tire pressure warning valve and transmitter constantly sends radio waves to the tire pressure warning antenna and receiver.

Under the following conditions, the tire pressure warning antenna and receiver is unable to receive the signals from the tire pressure warning valve and transmitters, and a DTC is output.
- Areas, 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.





HINT: When no signals are received for 30 minutes or more, a DTC is output. DTCs C2121/21 to C2125/25 can only be cleared by using the tester. DTCs C2181/81 to C2185/85 can be cleared when the transmitter in the tire pressure warning valve and transmitter sends a forced transmission signal or test mode ends. DTCs C2181/81 to C2185/85 are output only in test mode.

Wiring Diagram:

NOTICE:
- Tires and wheels without tire pressure warning valves and transmitters are used.
- When replacing the tire pressure warning ECU, read the IDs stored in the ECU using the intelligent tester and note them down before removal.
- It is necessary to perform initialization after registration the transmitter IDs into the tire pressure warning ECU after the tire pressure warning ECU and/ or tire pressure warning valve and transmitter have been replaced. Registration

INSPECTION PROCEDURES

Step 1:

Step 1(continued):

Steps 1(continued)-2:

Step 3:

Step 5(continued):