DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module [09/2015 - ]: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] .
2. Check if the same DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] .
   RESULT
   
   

   Result	Proceed to
   DTCs are output	A
   DTCs are not output	B

Result: 

A 

CHECK CAN COMMUNICATION SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2020] Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )