DTC U0293: Lost Communication with HV ECU [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (POWER SOURCE) See step 1
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

OK: Go to next step
CHECK HARNESS AND CONNECTOR (GROUND) See step 2
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step
CHECK FOR DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
2. Check for DTCs again.
  OK
  
  DTC U0293 is not output
NG → See step 4

OK → See step 5
REPLACE POWER MANAGEMENT CONTROL ECU. Refer to REMOVAL [08/2013 - ]
END (USE SIMULATION METHOD TO CHECK). Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]