HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A7F-123

DESCRIPTION

• The battery voltage sensor and the power management 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 power management control ECU. Then the power management 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.

  

  DTC No.	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 voltage sensor

  Related Data List

  DTC No.	Data List
  P0A7F-123	Internal Resistance R01 to R16 State of Charge (All Bat) Battery Block Vol -V01 to V16

  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.)

  • 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. 1 and No. 6 hybrid battery intake duct.

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

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK FOR DTCS (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. Read output DTCs.

      Result

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

   5. Turn the power switch off.

   
   

   B

   GO TO DTC CHART (P0AFC-123) Click here

   A

2. READ VALUE USING GTS (VB01 - VB16)

   
   

   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 power switch 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 V16.

   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 V16" while fully depressing the accelerator pedal.

   10. Compare the battery block voltages "Battery Block Vol -V01 to V16" 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
       Battery Block Vol - V12 (VB12)	Battery Block Vol - V11 (VB11)	"Battery Block Vol - V12" - "Battery Block Vol - V11" = 0.3 V or more
       Battery Block Vol - V13 (VB13)	Battery Block Vol - V14 (VB14)	"Battery Block Vol - V13" - "Battery Block Vol - V14" = 0.3 V or more
       Battery Block Vol - V16 (VB16)	Battery Block Vol - V15 (VB15)	"Battery Block Vol - V16" - "Battery Block Vol - V15" = 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
       Battery Block Vol - V12 (VB12)	Battery Block Vol - V11 (VB11)	"Battery Block Vol - V11" - "Battery Block Vol - V12" = 0.3 V or more
       Battery Block Vol - V13 (VB13)	Battery Block Vol - V14 (VB14)	"Battery Block Vol - V14" - "Battery Block Vol - V12" = 0.3 V or more
       Battery Block Vol - V16 (VB16)	Battery Block Vol - V15 (VB15)	"Battery Block Vol - V15" - "Battery Block Vol - V16" = 0.3 V or more

       

       Tech Tips

       When an internal malfunction occurs in the battery voltage sensor, this symptom (difference in voltage of 0.3 V or more for all 8 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 power switch off.

   
   

   A

   REPLACE BATTERY VOLTAGE SENSOR Click here

   B

   REPLACE HV BATTERY Click here