HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A7F-123

DTC Code DTC Name
P0A7F-123 Hybrid Battery Pack Deterioration

DESCRIPTION

The battery smart unit and the hybrid vehicle control ECU calculate the SOC (state of charge) of the HV battery through the accumulated amperage in the HV battery. The battery smart unit sends the condition of the HV battery to the hybrid vehicle control ECU. Then the hybrid vehicle control ECU calculates the SOC based on the information and controls HV battery charge and discharge according to the driving conditions.

A004FIUE06
DTC No. INF Code DTC Detection Condition Trouble Area
P0A7F 123

    When either condition below is met:

  • Resistance of an HV battery block exceeds the specified value.

    (1 trip detection logic)

  • Difference in capacity between each battery block is larger than the standard.

    (2 trip detection logic)

  • HV battery

  • Battery smart unit
Related Data List
DTC No. Data List
P0A7F-123

  • Internal Resistance R01 to R10

  • Battery Block Vol -V01 to V10

  • State of Charge (All Bat)

The following items can be helpful when performing repairs:



Tech Tips


  • For confirmation of this DTC output, it needs clearing DTCs and driving the vehicle for approximately 10 minutes. (As 2 trip detection logic is also used, check for DTCs including pending DTCs.)

  • When the internal resistance of the HV battery increases, battery block voltage may drop.

  • If "Maintenance required for Traction battery cooling parts. See owner's manual." is displayed on the multi-information display*1, or go to service warning light in the combination meter assembly illuminates*2, perform the following procedures.


    • Make sure the air intake port is not blocked.

    • Make sure there are no gaps between the connecting parts of the ducts.

    • Clean the battery cooling blower mesh.


      • Afterwards, clear the DTCs to reset the learning values even if no DTCs are stored.


    • *1: for TFT Meter Type

    • *2: except TFT Meter Type

CAUTION / NOTICE / HINT

CAUTION:

When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Tech Tips

After the repair, clear the DTCs, perform the following operations, and check that no DTCs (including pending DTCs) are output.


  1. Turn the ignition switch to ON (READY) and wait for 30 seconds or more.

    Drive the vehicle on urban road at a speed of 40 km/h (25 mph) or more for a total at least 10 minutes.

    (It is not necessary to maintain the vehicle speed at 40 km/h (25 mph) throughout the road test.)

    Note

    Avoid abrupt acceleration or braking.

    This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

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

    4. Check and record any HV system DTCs, INF codes and freeze frame data.

    5. Read output DTCs Click here.

      Result
      Result Proceed to
      P0AFC-123 is not output. A
      P0AFC-123 is also output. B

    6. Turn the ignition switch off.

    7. Disconnect the GTS from the DLC3.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. CHECK BATTERY SMART UNIT


    1. Ensure the safety of the areas in front and at the back of the vehicle.

    2. Apply the parking brake and secure the wheels using chocks.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON (READY).

    5. Fully warm up the engine and turn the air conditioning off.

    6. Enter the following menus: Powertrain / Hybrid Control / Data List / Battery block Vol - V01 to V10.

    7. Firmly depress the brake pedal with your left foot.

    8. Move the shift lever to D.

    9. Record each battery block voltage from the Data List "Battery Block Vol - V01 to V10" while fully depressing the accelerator pedal.

    10. Compare the battery block voltages "Battery Block Vol - V01 to V10" between the even and odd number groups in each combination shown in the table below.

      Table 1
      Circuit A Battery Block Circuit B Battery Block Condition
      Battery Block Vol - V01 (VB1) Battery Block Vol - V02 (VB2) "Battery Block Vol - V01" - "Battery Block Vol - V02" = 0.3 V or more
      Battery Block Vol - V04 (VB4) Battery Block Vol - V03 (VB3) "Battery Block Vol - V04" - "Battery Block Vol - V03" = 0.3 V or more
      Battery Block Vol - V05 (VB5) Battery Block Vol - V06 (VB6) "Battery Block Vol - V05" - "Battery Block Vol - V06" = 0.3 V or more
      Battery Block Vol - V08 (VB8) Battery Block Vol - V07 (VB7) "Battery Block Vol - V08" - "Battery Block Vol - V07" = 0.3 V or more
      Battery Block Vol - V09 (VB9) Battery Block Vol - V10 (VB10) "Battery Block Vol - V09" - "Battery Block Vol - V10" = 0.3 V or more
      Table 2
      Circuit A Battery Block Circuit B Battery Block Condition
      Battery Block Vol - V01 (VB1) Battery Block Vol - V02 (VB2) "Battery Block Vol - V02" - "Battery Block Vol - V01" = 0.3 V or more
      Battery Block Vol - V04 (VB4) Battery Block Vol - V03 (VB3) "Battery Block Vol - V03" - "Battery Block Vol - V04" = 0.3 V or more
      Battery Block Vol - V05 (VB5) Battery Block Vol - V06 (VB6) "Battery Block Vol - V06" - "Battery Block Vol - V05" = 0.3 V or more
      Battery Block Vol - V08 (VB8) Battery Block Vol - V07 (VB7) "Battery Block Vol - V07" - "Battery Block Vol - V08" = 0.3 V or more
      Battery Block Vol - V09 (VB9) Battery Block Vol - V10 (VB10) "Battery Block Vol - V10" - "Battery Block Vol - V09" = 0.3 V or more
      A004ELBE04
      A004F5GE04

      Tech Tips

      When an internal malfunction occurs in the battery smart unit, this symptom (difference in voltage of 0.3 V or more for all 5 pairs of blocks) will occur.

      Result
      Result Proceed to
      All conditions in table 1 are met. A
      All conditions in table 2 are met.
      Other than above B

    11. Turn the ignition switch off.


    A

    REPLACE BATTERY SMART UNIT Click here

    B

    REPLACE HV BATTERY Click here