HYBRID BATTERY SYSTEM, Diagnostic DTC:P056014

DTC Code DTC Name
P056014 System Voltage (BATT) Circuit Short to Ground or Open

DESCRIPTION

Auxiliary battery power is supplied to the BATT terminal of the battery ECU assembly in order to store DTCs and freeze frame data. Even if the power switch is turned off, back-up power is supplied.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P056014 System Voltage (BATT) Circuit Short to Ground or Open

Malfunction in the battery ECU assembly back-up power source circuit

(1 trip detection logic)

  • Wire harness or connector

  • Battery ECU assembly

  • Fuse

 Comes on

Master Warning Light:

Comes on

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. With power switch on (IG) and wait for 5 seconds or more.

  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.

WIRING DIAGRAM

B006IT0E04

CAUTION / NOTICE / HINT

CAUTION:


  • B006HUP

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

    • Disconnecting the low voltage connector of the electric vehicle charger assembly

    • Disconnecting the low voltage connector of the solar energy control unit

  • B006IQP

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • B006HQC

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B006IVPC02
    *a Without waiting for 10 minutes

    After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE


  1. CHECK FUSE (ECU-B NO. 1)


    1. B006J9AC03
      *1 Instrument Panel Junction Block Assembly
      *2 ECU-B NO. 1 Fuse

      Remove the ECU-B NO. 1 fuse from the instrument panel junction block assembly.

    2. Check if there is an open circuit in the ECU-B NO. 1 fuse in the instrument panel junction block assembly.

      OK
      There is no open circuit in the ECU-B NO. 1 fuse.

    3. Install the ECU-B NO. 1 fuse.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUSE (ECU-B NO. 1)

    OK

  2. CHECK CONNECTOR CONNECTION CONDITION (BATTERY ECU ASSEMBLY)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper hybrid battery cover sub-assembly.

      Click here

    3. B006J82N06

      Check the connections of the t14 battery ECU assembly connector.

      Click here

      OK
      The connectors are connected securely and there are no contact pressure problems.

    4. Install the upper hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    NG

    CONNECT SECURELY

    OK

  3. CHECK HARNESS AND CONNECTOR (AM VOLTAGE)

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper hybrid battery cover sub-assembly.

      Click here

    3. B006J82N02

      Disconnect the t14 battery ECU assembly connector.

      Note

      Before disconnecting the connector, check that it is not loose or disconnected.

    4. B006I6MC41
      *a

      Front view of wire harness connector

      (to Battery ECU Assembly)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      t14-1 (AM) - t14-9 (GND) Power switch off 11 to 14 V

    5. Reconnect the t14 battery ECU assembly connector.

    6. Install the upper hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY ECU ASSEMBLY Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (ECU-B NO. 1 FUSE - BATTERY TERMINAL)


    1. Remove the ECU-B NO. 1 fuse from the instrument panel junction block assembly.

    2. Disconnect the cable from the negative (-) auxiliary battery terminal.

    3. Disconnect the cable from the positive (+) auxiliary battery terminal.

    4. B006I1HC02
      *1 Instrument Panel Junction Block Assembly
      *a ECU-B NO. 1 Fuse Terminal

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-B NO.1 fuse terminal 1 - Auxiliary battery positive (+) cable Power switch off Below 1 Ω
      ECU-B NO.1 fuse terminal 1 - Body ground Power switch off 10 kΩ or higher

    5. Connect the cable to the positive (+) auxiliary battery terminal.

    6. Connect the cable to the negative (-) auxiliary battery terminal.

    7. Install the ECU-B NO. 1 fuse to the instrument panel junction block assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECU-B NO. 1 FUSE - BATTERY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (ECU-B NO. 1 FUSE - BATTERY TERMINAL)