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.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
  P0A7F-123	Hybrid Battery Pack Deterioration	When either condition below is met: Resistance of an HV battery block exceeds the standard 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	Comes on	Comes on

  Related Data List
  DTC No. Data List P0A7F-123 Internal Resistance R01 to R14 Battery Block Vol -V01 to V14 State of Charge (All Bat)

  Tech Tips

  In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following as necessary:

  
  

  • Make sure the air intake port is not blocked.

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

INSPECTION PROCEDURE

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. Read output DTCs.

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

      
      Powertrain > Hybrid Control > Trouble Codes

   5. Turn the power switch off.

   6. Disconnect the GTS from the DLC3.

   
   

   B

   GO TO DTC CHART (P0AFC-123) Click here

   A

2. READ VALUE USING GTS (VB1 - VB14)

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

   
   

   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 V14.

      
      Powertrain > Hybrid Control > Data List

      Tester Display
      Battery Block Vol -V01
      Battery Block Vol -V02
      Battery Block Vol -V03
      Battery Block Vol -V04
      Battery Block Vol -V05
      Battery Block Vol -V06
      Battery Block Vol -V07
      Battery Block Vol -V08
      Battery Block Vol -V09
      Battery Block Vol -V10
      Battery Block Vol -V11
      Battery Block Vol -V12
      Battery Block Vol -V13
      Battery Block Vol -V14

   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 V14" while fully depressing the accelerator pedal.

   10. Compare the battery block voltages "Battery Block Vol - V01 to V14" 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

       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 - V13" = 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 7 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.

   12. Disconnect the GTS from the DLC3.

   
   

   A

   REPLACE BATTERY VOLTAGE SENSOR Click here

   B

   REPLACE HV BATTERY Click here