P0A7F

P313 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 hybrid vehicle 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 hybrid vehicle control ECU. Then the hybrid vehicle 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 hybrid vehicle control ECU 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 ignition switch to ON and turn the Techstream on.

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

4. Turn the ignition switch off.

5. Turn the ignition switch to ON (READY) and turn the Techstream on.

6. Turn the ignition switch to 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 (DTC P0AFC-123 IS OUTPUT)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(d) Read output DTCs Hybrid Battery System.

Result





B -- GO TO DTC P0AFC-123 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 ignition switch to ON (READY).

(d) Enter the following menus: Powertrain / Hybrid Control / Data List / Battery Block Vol-V01 to 15.

(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 D.

(h) Record each battery block voltage from the data list (Battery Block Vol-V01 to 15) while fully depressing the accelerator pedal.

(i) Compare the battery block voltages (Battery Block Vol-V01 to 14) between the even and odd number groups in each combination shown in the table below.





HINT
Compare the V15 battery block voltage with the V13 battery block voltage.

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

Result





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

B -- REPLACE HV BATTERY ASSEMBLY Removal

A -- REPLACE BATTERY SMART UNIT Removal