DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0142: Lost Communication With Body Control Module "B"; DTC U023A: Lost Communication With Image Processing Module "A"; DTC U1104: Lost Communication with Driving Support ECU [09/2017 - 05/2019]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [09/2017 - ]

   Body Electrical > Head Up Display > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check if CAN communication DTCs are output.

   Refer to DTC CHECK / CLEAR [09/2017 - ]

   Body Electrical > Head Up Display > Trouble Codes 

   HINT: 

   • If CAN communication system malfunction DTCs are output, they may also be output for other systems.
   • If the CAN communication system has been inspected and repaired in other systems, the DTC will not be output when rechecking for DTCs.
   • If the DTC is output frequently, duplicate the conditions that cause the problem symptoms and perform the check again, even though the DTC was not output when rechecking for DTCs.

     Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019]

   OK

   DTC U0100, U0142, U023A, and U1104 are not output

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019] 

Result: 

NG 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019]