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Home >> Scion >> 2014 >> iQ EV >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Battery System (Diagnostic Codes & Symptom Tests) (Electric) >> Hybrid Battery System >> DTC U0293-831: Lost Communication with EV Control Module >> Procedure

DTC U0293-831: Lost Communication with EV Control Module: Procedure

  1. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Health Check.
    5. Read output DTCs.
      RESULT

      Result Proceed to
      Only U0293-831 is output A
      Any CAN communication system DTC other than U0293-831 is also output. B
    6. Turn the power switch off.

    B → GO TO CAN COMMUNICATION SYSTEM 

    A: Go to next step 

  2. POWER MANAGEMENT CONTROL ECU MUST BE REPLACED 
    1. Even though it has been determined that the power management control ECU needs to be replaced, make sure to inspect the voltage difference between No. 1 EV battery and No. 2 EV battery before replacing it.

    NEXT → See step   3 

  3. GO TO GO TO NO. 1 EV BATTERY - NO. 2 EV BATTERY VOLTAGE DIFFERENCE INSPECTION. Refer to  No. 1 EV Battery - No. 2 EV Battery Voltage Difference Inspection