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Home >> Toyota >> 2018 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Suspension >> Wheels & Tire System >> Tire Pressure Warning System- Diagnostic Codes & Circuit Tests >> Tire Pressure Warning System >> DTC C2121: Transmitter ID 1 not Received (Main); DTC C2122: No Signal from Transmitter ID2; DTC C2123: No Signal from Transmitter ID3; DTC C2124: No Signal from Transmitter ID4; DTC C2125: No Signal from Transmitter ID5; DTC C2181: Transmitter ID1 not Received (Test Mode DTC); DTC C2182: Transmitter ID2 not Received (Test Mode DTC); DTC C2183: Transmitter ID3 not Received (Test Mode DTC); DTC C2184: Transmitter ID4 not Received (Test Mode DTC); DTC C2185: Transmitter ID5 not Received (Test Mode DTC) [08/2021 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • When replacing the tire pressure warning ECU and receiver or tire pressure warning valve and transmitter, read the transmitter IDs and number of the transmitters (4 or 5) stored in the old ECU using the Techstream and write them down before removal.
  • It is necessary to perform initialization. Refer to INITIALIZATION [08/2019 - ] after registration. Refer to REGISTRATION [08/2021 - ] of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU and/or one of the valve and transmitters has been replaced.
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