HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A80-123

DESCRIPTION

• The HV battery uses nickel metal-hydride batteries and does not require external charging. The power management control ECU controls the SOC (state of charge) of the HV battery at a constant level during driving. The HV battery is composed of 28 modules, and each module consists of eight 1.2 V cells in series. The battery smart unit monitors battery block voltage at 14 locations. Each battery block is composed of 2 modules in a set.

  

  *1	Battery Block
  *2	Battery Module
  *3	Battery Smart Unit

  

  DTC No.	DTC Detection Condition	Trouble Area
  P0A80-123	Difference in voltage between battery blocks is larger than the standard (2 trip detection)	HV battery Battery smart unit

  Tech Tips

  
  

  • P0A80-123 will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTC. (As 2 trip detection logic is used, check for DTCs including pending DTCs.)

  • DTC P0A80-123 is stored when a malfunction is detected in the HV battery or battery smart unit. If the HV supply battery is malfunctioning, the malfunction may not be reproduced when the condition of the HV supply battery changes due to difference in driving load (amperage), battery SOC and battery temperature. Therefore, use the freeze frame data when performing a repair.

  
  

  1. When the HV battery is malfunctioning:

  
  

  • - Voltage of 1 or a few battery blocks has dropped. (voltage difference from that of the next block is 1 V or more.)

  • - Voltage of all battery blocks is output randomly with no certain pattern.

  2. When the battery smart unit is malfunctioning:

  
  

  • - Differences in battery block voltages have a certain pattern.

  • 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 TRACTION BATTERY COOLING PARTS SEE OWNER'S MANUAL" 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 No. 1 hybrid battery intake filter.

  
  

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

PROCEDURE

1. CHECK DTC OUTPUT (HV)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter the following menus: Powertrain / Hybrid Control / DTC.

   4. Check if DTCs are output.

      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 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.

   5. Using the GTS, make a note of the freeze frame data item "Battery Block Vol -V01 to V14".

   6. Compare the freeze frame data item "Battery Block Vol -V01 to V14" values with those shown in the following combination tables.

      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 smart unit, 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

   7. Turn the power switch off.

   8. Disconnect the GTS from the DLC3.

   
   

   A

   REPLACE BATTERY SMART UNIT Click here

   B

   REPLACE HV BATTERY Click here