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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Vehicle Control (P310) - RX400H - DTC P0A78-266 Through P0A79-812 >> DTC P0A78-586 Drive Motor "A" Inverter Performance >> Inspection Procedure

Inspection Procedure

  1. READ OUTPUT DTC (HV) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch to the ON position.
    3. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / DTC INFO / CURRENT CODES.
    4. Read output DTCs. (See DTC CHECK / CLEAR )

      Result: The DTCs shown in the table below are output 

      DTCS RESULT DESCRIPTION

      DTC No. Relevant Diagnosis
      P0A1A, P0A1B MG-ECU circuit malfunction
      P0A1D HV ECU circuit malfunction

    YES: GO TO  DTC CHART 

    NO: REPLACE W/ CONVERTER INVERTER ASSEMBLY 

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