DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0163: Lost Communication with Navigation Control Module [04/2018 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota Avalon and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC

Clear the DTCs.
Body Electrical > Telematics > Clear DTCs

Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Telematics > Trouble Codes

Result

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

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.
If the CAN communication system has been inspected and repaired, these DTCs will not be output when rechecking for DTCs.
If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 -]

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 -]

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 -]