HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A7F-123

DTC Code DTC Name
P0A7F-123 Hybrid Battery Pack Deterioration

DESCRIPTION

The battery voltage sensor 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 voltage sensor 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 condition.

Based on the HV battery voltage and current, the battery voltage sensor calculates the resistance and judges that the HV battery has deteriorated.

B002H3QE06
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A7F-123 Hybrid Battery Pack Deterioration

Either of the following conditions 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)

  • Battery voltage sensor

  • HV battery

  • HV battery junction block assembly

 Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0A7F-123

  • Internal Resistance R01 to R17

  • State of Charge (All Bat)

  • Battery Block Vol -V01 to V17

The following items can be helpful when performing repairs:



Tech Tips


  • This DTC can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes. (As 2 trip detection logic is also used, check for DTCs including pending DTCs.)


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


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


  • In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance required for hybrid battery cooling parts at your dealer" is displayed on the multi-information display, make sure to perform the following items:


    • Make sure the air intake port is not blocked.


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


    • Clean the filter of the No. 2 or No. 3 hybrid battery intake duct.


      • Clear the DTCs to reset the learning values even if no DTCs are stored.

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 power switch on (READY) and wait for 30 seconds or more.

    Drive the vehicle on urban roads at a speed of 25 mph (40 km/h) or more for a total of 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 steady speed.

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.

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

    5. Read output DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Result
      Result Proceed to
      P0AFC-123 is not output. A
      P0AFC-123 is also output. B

    6. Turn the power switch off.

    7. Disconnect the GTS from the DLC3.


    B

    GO TO DTC CHART (P0AFC-123) Click here

    A

  2. 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.

    4. Read output DTCs.


      Powertrain > Hybrid Control > Trouble Codes

    5. Using the GTS, make a note of the freeze frame data item "Number of Battery Current Sensor Characteristics Determination".

      Result
      Result Proceed to
      0 to 99 A
      Other than above B

    6. Turn the power switch off.


    B

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    A

  3. READ VALUE USING GTS (VB1 - VB17)

    Click here

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

    A

    REPLACE BATTERY VOLTAGE SENSOR Click here

    B

    REPLACE HV BATTERY Click here