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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 P0AA1-231 Through U0424-537 >> DTC P3000-388 HV Battery Malfunction >> 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: 

      DTCs other than P3000-388, P3000-389, and P0AF8 are output. 

    YES: GO TO  DTC CHART 

    NO: Go to next step 

  2. CHECK AMOUNT OF GASOLINE 
    1. Turn the ignition switch to the ON position. Check the amount of fuel with the fuel gauge in the meter.

      OK: Proper amount of fuel is in the tank. 

    NG: REFUEL GASOLINE 

    OK: Go to next step 

  3. CHECK ENGINE START 
    1. Put the vehicle into the READY-on state. Check if the engine starts.

      OK: The engine starts. 

    NO: REPLACE HV BATTERY 

    YES: LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS