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HYBRID BATTERY SYSTEM, Diagnostic DTC:P300016

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

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.

Table 1. 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
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CONFIRMATION DRIVING PATTERN

Tip:

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.

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  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.

    Tip:

    • 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.

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CAUTION / NOTICE / HINT

Tip:

  • 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.

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PROCEDURE


  1. Click here

    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.


      1. Powertrain > HV Battery > Trouble Codes



      1. 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.


  2. Click here

    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.


      1. Powertrain > Engine > Trouble Codes


      Result
      Proceed to
      No DTCs are output.
      DTCs are output.

    5. Turn the power switch off.


    • No DTCs are output.Click here
    • 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

  3. Click here

    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.

      Tip:

      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.Click here
    • The engine starts.

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

  4. Click here

    CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)


    1. Push the P position switch (shift position indicator) 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 BATTERYClick here

      Tip:

      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.Click here
  5. Click here

    CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)


    1. Turn the power switch on (IG).

    2. Move the shift lever to select neutral (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.


  6. Click here

    REPAIR OR REPLACE ENGINE

    Result
    Proceed to
    NEXT

  7. Click here

    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.

      Tip:

      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 BATTERYClick here

      Tip:

      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. Click here

    REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY

    for 2WD:

    Click here

    for AWD:

    Click here

    Result
    Proceed to
    NEXT

  9. Click here

    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.

      Tip:

      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 BATTERYClick here

      Tip:

      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