DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Skid Control ECU; DTC U0131: Lost Communication with Power Steering Control Module; DTC U0142: Lost Communication with Main Body ECU; DTC U0151: Lost Communication with Airbag ECU; DTC U023A: Lost Communication with Front Camera Module [11/2015 - 06/2017]: Procedure

1. Check if CAN communication DTCs are output (Refer to DIAGNOSIS SYSTEM [11/2015 - 06/2017] w/ Toyota Safety Sense C. Refer to DIAGNOSIS SYSTEM [11/2015 - ] w/o Toyota Safety Sense C).

   Result

   Result	Proceed to
   DTCs are output (w/ Toyota Safety Sense C).	A
   DTCs are output (w/o Toyota Safety Sense C).	B
   DTCs are not output.	C

Result: 

A 

REFER TO CAN COMMUNICATION SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ] )

Result: 

B 

REFER TO CAN COMMUNICATION SYSTEM 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ] )

Result: 

C 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - ] )