DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0104: Lost Communication with Cruise Control Module; DTC U0122: Lost Communication With Vehicle Dynamics Control Module [01/2019 - 09/2022]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTCs
- Clear the DTCs.
Powertrain > Cruise Control > Clear DTCs
- Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
- Check for DTCs.
Powertrain > Cruise Control > Trouble Codes
Result
Result Proceed to DTC U0100, U0104 and U0122 are not output A DTC U0100, U0104 or U0122 is output B
Result:
A
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]
Result:
B
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - 09/2022]
- Clear the DTCs.