HYBRID BATTERY SYSTEM, Diagnostic DTC:P0A7F-123

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.

  Based on the HV battery voltage and current, the battery smart unit calculates the resistance and judges the HV battery has deteriorated.

  

  DTC No.	INF Code	DTC Detection Condition	Trouble Area
  P0A7F	123	Internal resistance of the 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

  Tech Tips

  
  

  • P0A7F-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.)

  • In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary:

  
  

  • Make sure the air intake port is not blocked.

  • Make sure there are no gaps between the connecting parts of the ducts.

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK DTC OUTPUT (HYBRID CONTROL)

   
   

   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.

      Result
      Result Proceed to P31AB-123 is not output A P31AB-123 is output B

   5. Turn the power switch off.

   
   

   B

   GO TO DTC CHART (P31AB-123) Click here

   A

2. CHECK DTC OUTPUT (HYBRID CONTROL)

   
   

   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 Click here.

      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 (P0AFC-123) Click here

   A

3. READ VALUE USING GTS (VB1 - VB8)

   
   

   1. Ensure the safety of the areas in front and at the back of the vehicle.

   2. Apply the parking brake and secure the wheels using chocks.

   3. Connect the GTS to the DLC3.

   4. Turn the power switch on (READY).

   5. Fully warm up the engine and turn the air conditioning off.

   6. Enter the following menus: Powertrain / Hybrid Control / Data List / Battery Block Vol - V01 to V08.

   7. Firmly depress the brake pedal with your left foot.

   8. Move the select lever to D.

   9. Record each battery block Voltage from the Data List (Battery Block Vol -V01 to V08) while fully depressing the accelerator pedal.

   10. Compare the battery block voltages (Battery Block Vol -V01 to V08) between the even and odd number groups in each combination shown in the table below.

       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" = 0.6 V or more
       Battery Block Vol-V04 (VB4)	Battery Block Vol-V03 (VB3)	"Battery Block Vol - V04" - "Battery Block Vol - V03" = 0.6 V or more
       Battery Block Vol-V05 (VB5)	Battery Block Vol-V06 (VB6)	"Battery Block Vol - V05" - "Battery Block Vol - V06" = 0.6 V or more
       Battery Block Vol-V08 (VB8)	Battery Block Vol-V07 (VB7)	"Battery Block Vol - V08" - "Battery Block Vol - V07" = 0.6 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" = 0.6 V or more
       Battery Block Vol-V04 (VB4)	Battery Block Vol-V03 (VB3)	"Battery Block Vol - V03" - "Battery Block Vol - V04" = 0.6 V or more
       Battery Block Vol-V05 (VB5)	Battery Block Vol-V06 (VB6)	"Battery Block Vol - V06" - "Battery Block Vol - V05" = 0.6 V or more
       Battery Block Vol-V08 (VB8)	Battery Block Vol-V07 (VB7)	"Battery Block Vol - V07" - "Battery Block Vol - V08" = 0.6 V or more

       

       Result
       Result Proceed to All conditions in table 1 are met. A All conditions in table 2 are met. Other than above. B

   11. Turn the power switch off.

   
   

   A

   REPLACE BATTERY SMART UNIT Click here

   B

4. CHECK BATTERY SMART UNIT

   Note

   Make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance.

   
   

   1. Remove the battery smart unit.

      Click here

   2. Measure the resistance according to the value(s) in the table below.

      Tech Tips

      It is only necessary to measure the resistance of the battery smart unit at the terminals which relate to the lower voltage battery block of pairs of battery blocks for which the difference in voltage in the Data List was 0.6 V or more.

      

      *a

      Component without harness connected (Battery Smart Unit)

      -

      -

      Standard Resistance (When Value of Battery Block Vol-V01 (VB1) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z32-13 (GA0) (-) - z32-9 (VA1) (+) Always 50 kΩ or higher z32-9 (VA1) (-) - z32-5 (VA2) (+) Always 50 kΩ or higher z32-5 (VA2) (-) - z32-1 (VA3) (+) Always 50 kΩ or higher z32-1 (VA3) (-) - z32-14 (VA4) (+) Always 50 kΩ or higher z32-14 (VA4) (-) - z32-10 (VA5) (+) Always 50 kΩ or higher z32-10 (VA5) (-) - z32-6 (VA6) (+) Always 50 kΩ or higher z32-6 (VA6) (-) - z32-2 (VA7) (+) Always 50 kΩ or higher z32-13 (GA0) (-) -z32-2 (VA7) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V02 (VB2) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z32-2 (VA7) (-) - z32-15 (VA8) (+) Always 50 kΩ or higher z32-15 (VA8) (-) - z32-11 (VA9) (+) Always 50 kΩ or higher z32-11 (VA9) (-) - z32-7 (VA10) (+) Always 50 kΩ or higher z32-7 (VA10) (-) - z32-16 (VA11) (+) Always 50 kΩ or higher z32-16 (VA11) (-) - z32-12 (VA12) (+) Always 50 kΩ or higher z32-12 (VA12) (-) - z32-8 (VA13) (+) Always 50 kΩ or higher z32-8 (VA13) (-) - z32-4 (VA14) (+) Always 50 kΩ or higher z32-2 (VA7) (-) - z32-4 (VA14) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V03 (VB3) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z33-11 (GA1) (-) - z33-6 (VA15) (+) Always 50 kΩ or higher z33-6 (VA15) (-) - z33-1 (VA16) (+) Always 50 kΩ or higher z33-1 (VA16) (-) - z33-12 (VA17) (+) Always 50 kΩ or higher z33-12 (VA17) (-) - z33-7 (VA18) (+) Always 50 kΩ or higher z33-7 (VA18) (-) - z33-2 (VA19) (+) Always 50 kΩ or higher z33-2 (VA19) (-) - z33-13 (VA20) (+) Always 50 kΩ or higher z33-13 (VA20) (-) - z33-8 (VA21) (+) Always 50 kΩ or higher z33-11 (GA1) (-) - z33-8 (VA21) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V04 (VB4) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z33-8 (VA21) (-) - z33-3 (VA22) (+) Always 50 kΩ or higher z33-3 (VA22) (-) - z33-14 (VA23) (+) Always 50 kΩ or higher z33-14 (VA23) (-) - z33-9 (VA24) (+) Always 50 kΩ or higher z33-9 (VA24) (-) - z33-4 (VA25) (+) Always 50 kΩ or higher z33-4 (VA25) (-) - z33-15 (VA26) (+) Always 50 kΩ or higher z33-15 (VA26) (-) - z33-10 (VA27) (+) Always 50 kΩ or higher z33-10 (VA27) (-) - z33-5 (VA28) (+) Always 50 kΩ or higher z33-8 (VA21) (-) - z33-5 (VA28) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V05 (VB5) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z30-11 (GA2) (-) - z30-6 (VA29) (+) Always 50 kΩ or higher z30-6 (VA29) (-) - z30-1 (VA30) (+) Always 50 kΩ or higher z30-1 (VA30) (-) - z30-12 (VA31) (+) Always 50 kΩ or higher z30-12 (VA31) (-) - z30-7 (VA32) (+) Always 50 kΩ or higher z30-7 (VA32) (-) - z30-2 (VA33) (+) Always 50 kΩ or higher z30-2 (VA33) (-) - z30-13 (VA34) (+) Always 50 kΩ or higher z30-13 (VA34) (-) - z30-8 (VA35) (+) Always 50 kΩ or higher z30-11 (GA2) (-) - z30-8 (VA35) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V06 (VB6) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z30-8 (VA35) (-) - z30-3 (VA36) (+) Always 50 kΩ or higher z30-3 (VA36) (-) - z30-14 (VA37) (+) Always 50 kΩ or higher z30-14 (VA37) (-) - z30-9 (VA38) (+) Always 50 kΩ or higher z30-9 (VA38) (-) - z30-4 (VA39) (+) Always 50 kΩ or higher z30-4 (VA39) (-) - z30-15 (VA40) (+) Always 50 kΩ or higher z30-15 (VA40) (-) - z30-10 (VA41) (+) Always 50 kΩ or higher z30-10 (VA41) (-) - z30-5 (VA42) (+) Always 50 kΩ or higher z30-8 (VA35) (-) - z30-5 (VA42) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V07 (VB7) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z31-13 (GA3) (-) - z31-9 (VA43) (+) Always 50 kΩ or higher z31-9 (VA43) (-) - z31-5 (VA44) (+) Always 50 kΩ or higher z31-5 (VA44) (-) - z31-1 (VA45) (+) Always 50 kΩ or higher z31-1 (VA45) (-) - z31-14 (VA46) (+) Always 50 kΩ or higher z31-14 (VA46) (-) - z31-10 (VA47) (+) Always 50 kΩ or higher z31-10 (VA47) (-) - z31-6 (VA48) (+) Always 50 kΩ or higher z31-6 (VA48) (-) - z31-2 (VA49) (+) Always 50 kΩ or higher z31-13 (GA3) (-) - z31-2 (VA49) (+) Always 350 kΩ or higher

      Standard Resistance (When Value of Battery Block Vol-V08 (VB8) is Low)

      Tester Connection (Tester Probe Polarity) Condition Specified Condition z31-2 (VA49) (-) - z31-15 (VA50) (+) Always 50 kΩ or higher z31-15 (VA50) (-) - z31-11 (VA51) (+) Always 50 kΩ or higher z31-11 (VA51) (-) - z31-7 (VA52) (+) Always 50 kΩ or higher z31-7 (VA52) (-) - z31-16 (VA53) (+) Always 50 kΩ or higher z31-16 (VA53) (-) - z31-12 (VA54) (+) Always 50 kΩ or higher z31-12 (VA54) (-) - z31-8 (VA55) (+) Always 50 kΩ or higher z31-8 (VA55) (-) - z31-4 (VA56) (+) Always 50 kΩ or higher z31-2 (VA49) (-) - z31-4 (VA56) (+) Always 350 kΩ or higher

      Note

      
      

      • Make sure to check the polarity of each terminal (positive (+) or negative (-)) before connecting a tester.

      • Read the resistance after the value has stabilized.

      • In order to avoid damaging the terminals of the battery smart unit, make sure to use tester probes with a diameter of approximately 0.5 mm (0.0197 in.) when measuring the resistance of the battery smart unit.

      Result
      Result Proceed to All measured values were within specified range. A Other than above. B

   3. Install the battery smart unit.

   
   

   A

   REPLACE HV BATTERY Click here

   B

5. REPLACE BATTERY SMART UNIT

   Click here

   
   

   NEXT

   REPLACE HV BATTERY Click here