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 [11/2021 - ]: Procedure

1. Clear the DTCs.

   Powertrain > Radar Cruise1 > Clear DTCs 

2. Make sure that the DTC detection conditions are met.

   HINT: 

   If the detection conditions are not met, the system cannot detect the malfunction.

3. Check for DTCs.

   Powertrain > Radar Cruise1 > 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 [11/2021 - 09/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] 

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ]