C2124
DTC C2121/21 No Signal from Transmitter ID1DTC C2122/22 No Signal from Transmitter ID2
DTC C2123/23 No Signal from Transmitter ID3
DTC C2124/24 No Signal from Transmitter ID4
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)
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the air 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 air pressure values with the air pressure threshold. When the measured air 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 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.
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:
INSPECTION PROCEDURE
NOTICE:
^ When replacing the tire pressure warning ECU, read the IDs stored in the old ECU using the intelligent tester or 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.
Step 1-2:
Step 2:
Step 2-4:
Step 4:
Step 4-8:
Step 8-10:
Step 10:
