HYBRID CONTROL SYSTEM, Diagnostic DTC:P300000

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

DESCRIPTION

The hybrid vehicle control ECU alerts the driver and performs fail-safe control based on error signals received from the battery voltage sensor. This DTC is stored when the SOC (state of charge) of the HV battery has dropped excessively as a result of leaving neutral (N) selected, running out of fuel, or a malfunction in the hybrid system.

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

Discharging prohibited

Discharging of the HV battery continues even after discharging is prohibited when the hybrid system is malfunctioning and "Hybrid Battery SOC" has reached the lower limit.

(1 trip detection logic)

  • SFI system

  • Fuel level

  • HV battery

 Does not come on

Master Warning Light:

Does not come on
Related Data List
DTC No. Data List
P300000

  • Hybrid Battery SOC

  • WOUT Control Limit Power

  • Hybrid Battery Current

CONFIRMATION DRIVING PATTERN

Tech Tips

After repairs have been completed, clear the DTCs 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 / Hybrid Control / 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 or N/A, 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 (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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


      Powertrain > Hybrid Control > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      Only P300000 or P300016 is output A
      Other than above B

    5. Turn the power switch off.


    B

    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.


      Powertrain > Engine > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    5. Turn the power switch off.


    B

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

    A

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

      Tech Tips

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

    3. Turn the power switch off.


    B

    REFUEL VEHICLE

    A

  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 / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

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


      Powertrain > Hybrid Control > DTC(P300000) > Freeze Frame Data
      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 HV battery could not be charged.

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

    5. Turn the power switch off.

      Result
      Proceed to
      NEXT

    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
      Result Proceed to
      The engine starts A
      The engine does not start B

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


    A

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

    B

  6. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Clear the DTCs.


      Powertrain > Hybrid Control > Clear DTCs

    5. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

    CHARGE HV BATTERY (CHECK THAT ENGINE STARTS) Click here