HYBRID BATTERY SYSTEM, Diagnostic DTC:P300016

DTC Code DTC Name
P300016 Hybrid/EV Battery Control System Circuit Voltage Below Threshold

DESCRIPTION

The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals.

If the HV battery is discharged excessively or the hybrid battery system is malfunctioning, this DTC will be stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P300016 Hybrid/EV Battery Control System Circuit Voltage Below Threshold

A malfunction signal is received from the battery ECU assembly.

The voltage of any HV battery cell has decreased excessively.

(1 trip detection logic)

  • Engine

  • Hybrid vehicle transmission assembly

  • HV battery

 Does not come on

Master Warning Light:

Comes on

Tech Tips

If the HV battery voltage has dropped due to a malfunction in other components, such as the inverter with converter assembly or the hybrid vehicle transmission assembly, recharging the HV battery will be able to restore the voltage. If the HV battery voltage has dropped excessively after the vehicle was left for a long time, the HV battery will need to be replaced.

Related Data List
DTC No. Data List
P300016

  • Hybrid Battery Cell 1 to 84 Voltage

  • Hybrid Battery Cell 1 to 84 Internal Resistance

  • Hybrid Battery SOC

  • Hybrid Battery Voltage

  • Hybrid Battery Current

  • Engine Speed

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 (READY) with park (P) selected.

  6. Wait until the engine starts and then stops.

  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 or N/A, perform driving pattern again.

CAUTION / NOTICE / HINT

Tech Tips


  • Thoroughly interview the customer as DTC P300016 may be stored if the SOC drops due to the vehicle being left with neutral (N) selected for a long time or running out of fuel.

  • When the engine cannot be started, DTC P300016 may be stored because the HV battery cannot be charged.

  • If differences among SOCs of HV battery exceed the specifications, the hybrid system warning light may illuminate when "Battery Diagnosis" is complete. In this case, check for hybrid system related DTCs. If DTC P300016 is output, leave the vehicle with the power switch on (READY) for 10 minutes or more allowing the vehicle to charge the HV battery. Then clear the DTCs.

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

    No DTCs are output.

  3. CHECK ENGINE START


    1. Turn the power switch on (READY).

    2. Check if the engine starts.

      Note

      Do not turn the power switch on (READY) repeatedly after duplicating the problem symptom indicated by DTC P300016 and clearing the DTCs. This may cause another problem to occur.

      Tech Tips

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

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

    3. 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.

  4. CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)


    1. Push the P position switch (transmission shift main switch) to select park (P).

    2. Lift up the vehicle.

    3. Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

      CAUTION:

      Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch off before performing this inspection, to prevent the engine from starting.

      Note

      Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

      Result
      Proceed to
      The crankshaft rotates smoothly.
      The crankshaft does not rotate smoothly.

    4. Lower the vehicle.


    The crankshaft rotates smoothly.

    CHARGE HV BATTERY Click here As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

    The crankshaft does not rotate smoothly.

  5. CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)


    1. Turn the power switch on (IG).

    2. Move the shift lever to N.

    3. Lift up the vehicle.

    4. Turn the crankshaft pulley using hand tools to check if the crankshaft can rotate smoothly.

      CAUTION:

      Do not turn the power switch on (READY) while performing this inspection. Be sure to turn the power switch on (IG) before performing this inspection, to prevent the engine from starting.

      Note

      Engine compression causes resistance when turning the crankshaft pulley. Check if the crankshaft rotates smoothly (or if it is locked) by manually applying sufficient torque to turn the crankshaft pulley. The torque required to turn the crankshaft pulley should be the same as for a known good vehicle of the same type.

      Result
      Proceed to
      The crankshaft does not rotate smoothly.
      The crankshaft rotates smoothly.

    5. Lower the vehicle.

    6. Turn the power switch off.


    The crankshaft rotates smoothly.

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Click here

    The crankshaft does not rotate smoothly.

  6. REPAIR OR REPLACE ENGINE

    Result
    Proceed to
    NEXT

    NEXT

  7. CHECK ENGINE START


    1. Turn the power switch on (READY).

    2. Check if the engine starts.

      Note

      Do not turn the power switch on (READY) repeatedly after duplicating the problem symptom indicated by DTC P300016 and clearing the DTCs. This may cause another problem to occur.

      Tech Tips

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

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

    3. Turn the power switch off.


    The engine does not start.

    CHARGE HV BATTERY Click here As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

    The engine starts.

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

  8. REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  9. CHECK ENGINE START


    1. Turn the power switch on (READY).

    2. Check if the engine starts.

      Note

      Do not turn the power switch on (READY) repeatedly after duplicating the problem symptom indicated by DTC P3000-389 and clearing the DTCs. This may cause another problem to occur.

      Tech Tips

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

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

    3. Turn the power switch off.


    The engine does not start.

    CHARGE HV BATTERY Click here As the HV battery is not malfunctioning, it is necessary to charge the HV battery with the THS charger.

    The engine starts.

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