DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1170-08: Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication With Brake System Control Module(ch2) Missing Message [10/2022 - ]: Procedure

Pre-procedure1

1. None.

   Procedure1

2. Check for DTCs.

   Powertrain > Motor Generator > Trouble Codes 

   Result

   Result	Proceed to
   None of the following DTCs are output.	A
   Any of the following DTCs are also output.	B

   Relevant DTC
   P3124-87	Lost Communication between Drive Motor "A" and HV/EV ECU Missing Message

   HINT: 

   U0100-87, U0293-87, U1170-08 or U1170-87 may be stored due to a malfunction which also causes the DTCs in the preceding table to be stored. In this case, first troubleshoot the output DTCs in the preceding table. Then, perform a test to attempt to reproduce the problems, and check that no DTCs are output.

   Post-procedure1

3. Turn the ignition switch off.

Result: 

A 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 08/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2023 - ] 

Result: 

B 

GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - ]