P0A7F Internal resistance of HV battery is higher than the standard (1 trip detection) Difference in the capacity...

DESCRIPTION

1. The battery smart unit and the HV 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 HV control ECU. Then the HV control ECU calculates the SOC (state of charge) based on the information and controls HV battery charge and discharge according to the driving condition.
   

   DTC No.	DTC Detection Condition	Trouble Area
   P0A7F	Internal resistance of HV battery is higher than the standard (1 trip detection) Difference in the capacity between battery blocks is larger than the standard (2 trip detection)	HV battery Battery smart unit

   HINT:

   P0A7F will not output unless the vehicle is driven for approximately 10 minutes after clearing the DTC.

MONITOR DESCRIPTION

The battery smart unit calculates the resistance of the HV battery through amperage and voltage, and uses this resistance to determine the extent of deterioration of the HV battery. If the battery smart unit detects that the resistance of the HV battery has exceeded the standard, it determines that a malfunction has occurred. In addition, the battery smart unit monitors the SOC, and if the difference between the maximum and minimum SOC values exceeds the standard, it determines that a malfunction has occurred. When either of the malfunction detection conditions is met, the HV control ECU illuminates the MIL and sets a DTC.

INSPECTION PROCEDURE

1. READ OUTPUT DTC (DTC P0A1F IS OUTPUT)

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch to the ON position.

3. Select the following menu items: Powertrain / Hybrid Control / DTC.

4. Read output DTCs. (Click here)

   Result:

   DTC P0A1F is output.
   

YES	REPLACE BATTERY SMART UNIT

NO
REPLACE HV BATTERY