P0A7F

P310 HYBRID BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A7F: Hybrid Battery Pack Deterioration

DTC P0A7F - Hybrid Battery Pack Deterioration

DESCRIPTION
- 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.









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.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (DTC P0A1F IS OUTPUT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Read output DTCs Hybrid Battery System.
Result:






B -- GO TO DTC CHART (P0A1F)
A -- Continue to next step.
2. CHECK BATTERY SMART UNIT
(a) Ensure the safety of the areas in front and at the back of the vehicle.
(b) Connect Techstream to the DLC3.
(c) Put the vehicle in to the READY - on state.
(d) Select the following menu items: Powertrain / Hybrid Control / Data List / Battery Block Vol - V01 to V15.
(e) Fully warm up the engine and turn the air conditioning off.
(f) Firmly depress the brake pedal with your left foot.
(g) Move the shift lever to the D position.
(h) Record each battery block voltage from the data list (Battery Block Vol - V01 to V15) while fully depressing the accelerator pedal.
(i) Compare the battery block voltages (Battery Block Vol - V01 to V15) between the even and odd number groups in each combination shown in the table below.





(j) Check if the difference in voltage of each combination is 0.3 V or more.
Result:





HINT: Difference in voltage of each combination may be 0.3 V or more due to a battery smart unit internal error.

B -- REPLACE BATTERY SMART UNIT
A -- REPLACE HV BATTERY