HYBRID BATTERY SYSTEM, Diagnostic DTC:P300000

DTC Code DTC Name
P300000 Hybrid/EV Battery Discharge Control Malfunction

DESCRIPTION

The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals. If the SOC drops due to running out of fuel, the vehicle being left with neutral (N) selected for a long time or a hybrid control system malfunction, this DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P300000 Hybrid/EV Battery Discharge Control Malfunction

Discharging of the HV battery continues even after discharging is prohibited when the "SOC" has reached the lower limit.

(1 trip detection logic)

  • SFI system

  • Fuel level

  • HV battery state of charge

 Does not come on

Master Warning Light:

Does not come on
Related Data List
DTC No. Data List
P0C3000

  • Hybrid Battery SOC

  • Hybrid Battery Current

  • Shift Position

  • WOUT Control Limit Power

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. Turn the power switch on (READY) with park (P) selected and cause the "Hybrid Battery SOC" to decrease. Check that the engine is started to charge the HV battery, and the value of Data List item "Hybrid Battery SOC" increases and then remains within an appropriate range.

  7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE, perform driving pattern again.

CAUTION / NOTICE / HINT

Tech Tips


  • If the vehicle is left with neutral (N) selected (parked or stopped) for a long time, the battery cannot be charged. In this case, the SOC may drop below the lower limit and DTC P300000 may be stored. (This is not a system malfunction.)

  • When the engine cannot be started, DTC P300000 may be stored because the HV battery cannot be charged.

  • Repeated engine start checks may cause the SOC to drop, resulting in DTC P300000 being stored. In this case, charge the HV battery using the THS charger.

  • Cranking the engine once causes the SOC to drop approximately 1%.

  • Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.

  • Charging the HV battery using the THS charger takes approximately 10 minutes when the battery temperature is 25°C (77°F) or approximately 30 minutes when the battery temperature is 0°C (32°F).

  • The THS charger is a supplemental charging device that enables the hybrid system to start (READY-on state).

  • If the result of this inspection is to charge the HV battery, clear the DTCs and then charge the HV battery using the THS charger.

PROCEDURE


  1. CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.

    4. Check for DTCs.


      Powertrain > HV Battery > Trouble Codes
      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      "P300000 or P300016" only is output. A
      DTCs except "P300000 or P300016" of hybrid battery system are output. B
      DTCs except "P300000 or P300016" of hybrid control system are output. C

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here

    C

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

  2. CHECK DTC OUTPUT (ENGINE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Engine / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      No DTCs are output.
      DTCs are output.

    5. Turn the power switch off.


    DTCs are output.

    GO TO DTC CHART (SFI SYSTEM) SFI SYSTEM (w/ Canister Pump Module): GO TO DTC CHART (SFI SYSTEM) Click here
    GO TO DTC CHART (SFI SYSTEM) SFI SYSTEM (w/o Canister Pump Module): GO TO DTC CHART (SFI SYSTEM) Click here

    No DTCs are output.

  3. CHECK AMOUNT OF FUEL


    1. Turn the power switch on (IG).

    2. Check the amount of fuel by referring to the fuel gauge in the meter.

      Result
      Proceed to
      Proper amount of fuel is in the tank.
      There is no fuel in the tank.

      Tech Tips

      Add fuel until the low fuel level warning light turns off.

    3. Turn the power switch off.


    There is no fuel in the tank.

    REFUEL VEHICLE

    Proper amount of fuel is in the tank.

  4. CHECK FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / HV Battery / Trouble Codes.

    4. Read the freeze frame data item ''Shift Position'' of DTC P300000.


      Powertrain > HV Battery > Trouble Codes
      Powertrain > HV Battery
      Tester Display
      Shift Position

      Note


      • When the freeze frame data ''Shift Position'' was N, DTC P300000 may be stored due to the vehicle was left with neutral (N) selected and the battery cannot be charged.

      • If DTC ''P300000'' only is output, charge the HV battery without replacing the HV battery.

      Result
      Proceed to
      NEXT

    5. Turn the power switch off.


    NEXT

  5. CHECK ENGINE START


    1. Turn the power switch on (READY).

    2. Check if the engine starts.

      Tech Tips


      • Depressing the accelerator pedal with park (P) selected will cause the engine to start.

      • Turning the power switch on (READY) and off repeatedly while the SOC is low may cause the SOC to drop further, resulting in DTC P300016 being stored. Charge the HV battery using the THS charger as necessary.

      • Cranking the engine once causes the SOC to drop approximately 1%.

      • Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.

      Result
      Proceed to
      The engine starts.
      The engine does not start.

    3. If the engine does not start, turn the power switch off.


    The engine starts.

    LEAVE VEHICLE WITH PARK (P) SELECTED, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS

    The engine does not start.

  6. CLEAR DTC (HV BATTERY)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / HV Battery / Clear DTCs.

    4. Clear the DTCs and freeze frame data.


      Powertrain > HV Battery > Clear DTCs

    5. Perform a road test.

      Result
      Proceed to
      NEXT

    NEXT

    CHARGE HV BATTERY Click here Charge the HV battery using the ths charger, then check that engine starts.