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Home >> Toyota >> 2014 >> Prius Plug-in >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 120 (Smart Key System (For Start Function) (Diagnostic Codes & Symptom Tests) (Except Plug-In)) >> SMART KEY SYSTEM (for Start Function) >> DTC U0293: Lost Communication with HV ECU [10/2013 - ] >> Procedure
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DTC U0293: Lost Communication with HV ECU [10/2013 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) See step   1 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) See step   2 

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) 

    OK: Go to next step 

  3. CHECK FOR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [10/2013 - ] .
    2. Check for DTC again.

      OK

      DTC U0293 is not output

    NG → See step   4 

    OK → See step   5 

  4. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to  REMOVAL [10/2013 - ] 
  5. USE SIMULATION METHOD TO CHECK. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE [10/2013 - ]