P0A7F

HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM: P0A7F-123: Hybrid Battery Pack Deterioration
P0A7F-123 - Hybrid Battery Pack Deterioration

DESCRIPTION

- The battery smart unit 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 smart unit 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.









HINT
P0A7F-123 will not be set 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 power management control ECU (HV CPU) illuminates the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY) and turn the Techstream on.

6. Turn the power switch on (READY) and wait for 30 seconds or more.

7. Drive the vehicle on urban roads at a speed of 25 mph (40 km/h) or more for a total of at least 10 minutes. [A]

NOTICE:
Avoid abrupt acceleration or braking.

8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

9. Check that permanent DTCs are cleared.

10. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Read output DTCs Hybrid Battery System.

Result:





(e) Disconnect the Techstream from the DLC3.

B -- GO TO DTC CHART P0AFC-123
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 the Techstream to the DLC3.

(c) Turn the power switch on (READY).

(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Battery block Vol - V01 to V14.

(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 select lever to D.

(h) Record each battery block voltage from the data list (Battery block Vol -V01 to V14) while fully depressing the accelerator pedal.

(i) 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.





(j) Check the difference between each pair of battery block voltages.

Result:





HINT
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.





(k) Turn the power switch off.

(l) Disconnect the Techstream from the DLC3.

B -- REPLACE HV BATTERY Components

A -- REPLACE BATTERY SMART UNIT Components