DTC U0100: Lost Communication With ECM/PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU [03/2017 - 05/2023]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - 05/2023]

   Powertrain > Radar Cruise1 > Clear DTCs 

   Powertrain > Radar Cruise2 > 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 the DTCs.

   Refer to DTC CHECK / CLEAR [03/2017 - 05/2023]

   Powertrain > Radar Cruise1 > Trouble Codes 

   Powertrain > Radar Cruise2 > Trouble Codes 

   Result

   Result	Proceed to
   DTC U0100, U0122, U0125, U0126, U0129 and U1104 are not output	A
   DTC U0100, U0122, U0125, U0126, U0129 or U1104 is not output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 05/2023] 

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023]