LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2014 >> Prius Two >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Battery Management Systems >> Hybrid Battery System (Diagnostic Codes & Symptom Tests) (Except Plug-In) >> Hybrid Battery System >> DTC P3011-123: Battery Block 1 Becomes Weak; DTC P3012-123: Battery Block 2 Becomes Weak; DTC P3013-123: Battery Block 3 Becomes Weak; DTC P3014-123: Battery Block 4 Becomes Weak; DTC P3015-123: Battery Block 5 Becomes Weak; DTC P3016-123: Battery Block 6 Becomes Weak; DTC P3017-123: Battery Block 7 Becomes Weak; DTC P3018-123: Battery Block 8 Becomes Weak; DTC P3019-123: Battery Block 9 Becomes Weak; DTC P3020-123: Battery Block 10 Becomes Weak; DTC P3021-123: Battery Block 11 Becomes Weak; DTC P3022-123: Battery Block 12 Becomes Weak; DTC P3023-123: Battery Block 13 Becomes Weak; DTC P3024-123: Battery Block 14 Becomes Weak [10/2013 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P3011-123: Battery Block 1 Becomes Weak; DTC P3012-123: Battery Block 2 Becomes Weak; DTC P3013-123: Battery Block 3 Becomes Weak; DTC P3014-123: Battery Block 4 Becomes Weak; DTC P3015-123: Battery Block 5 Becomes Weak; DTC P3016-123: Battery Block 6 Becomes Weak; DTC P3017-123: Battery Block 7 Becomes Weak; DTC P3018-123: Battery Block 8 Becomes Weak; DTC P3019-123: Battery Block 9 Becomes Weak; DTC P3020-123: Battery Block 10 Becomes Weak; DTC P3021-123: Battery Block 11 Becomes Weak; DTC P3022-123: Battery Block 12 Becomes Weak; DTC P3023-123: Battery Block 13 Becomes Weak; DTC P3024-123: Battery Block 14 Becomes Weak [10/2013 - ]: Procedure

  1. CHECK DTC OUTPUT (DTC P0AFC-123 IS OUTPUT) See step   1 

    B → GO TO DTC CHART 

    A: Go to next step 

  2. CHECK BATTERY SMART UNIT 
    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 Techstream 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 V14.
    7. Firmly depress the brake pedal with your left foot.
    8. Move the shift lever to D.
    9. Record each battery block voltage from the Data List "Battery Block Vol -V01 to V14" while fully depressing the accelerator pedal.
    10. 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.

      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" = 0.3 V or more
      Battery Block Vol - V04 (VB4) Battery Block Vol - V03 (VB3) "Battery Block Vol - V04" - "Battery Block Vol - V03" = 0.3 V or more
      Battery Block Vol - V05 (VB5) Battery Block Vol - V06 (VB6) "Battery Block Vol - V05" - "Battery Block Vol - V06" = 0.3 V or more
      Battery Block Vol - V08 (VB8) Battery Block Vol - V07 (VB7) "Battery Block Vol - V08" - "Battery Block Vol - V07" = 0.3 V or more
      Battery Block Vol - V09 (VB9) Battery Block Vol - V10 (VB10) "Battery Block Vol - V09" - "Battery Block Vol - V10" = 0.3 V or more
      Battery Block Vol - V12 (VB12) Battery Block Vol - V11 (VB11) "Battery Block Vol - V12" - "Battery Block Vol - V11" = 0.3 V or more
      Battery Block Vol - V13 (VB13) Battery Block Vol - V14 (VB14) "Battery Block Vol - V13" - "Battery Block Vol - V14" = 0.3 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" = 0.3 V or more
      Battery Block Vol - V04 (VB4) Battery Block Vol - V03 (VB3) "Battery Block Vol - V03" - "Battery Block Vol - V04" = 0.3 V or more
      Battery Block Vol - V05 (VB5) Battery Block Vol - V06 (VB6) "Battery Block Vol - V06" - "Battery Block Vol - V05" = 0.3 V or more
      Battery Block Vol - V08 (VB8) Battery Block Vol - V07 (VB7) "Battery Block Vol - V07" - "Battery Block Vol - V08" = 0.3 V or more
      Battery Block Vol - V09 (VB9) Battery Block Vol - V10 (VB10) "Battery Block Vol - V10" - "Battery Block Vol - V09" = 0.3 V or more
      Battery Block Vol - V12 (VB12) Battery Block Vol - V11 (VB11) "Battery Block Vol - V11" - "Battery Block Vol - V12" = 0.3 V or more
      Battery Block Vol - V13 (VB13) Battery Block Vol - V14 (VB14) "Battery Block Vol - V14" - "Battery Block Vol - V13" = 0.3 V or more
      GTY441201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      GTY452205Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      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.

      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.

    B → See step   3 

    A → See step   5 

  3. CHECK DTC OUTPUT (DTC P3015-123 IS OUTPUT) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check if DTCs are output.
      RESULT

      Result Proceed to
      DTC P3015-123 is output. A
      DTC P3015-123 is not output. B
    5. Turn the power switch off.

    B → See step   4 

    A → REPLACE SERVICE PLUG GRIP AND HV BATTERY ASSEMBLY 

  4. REPLACE HV BATTERY ASSEMBLY. Refer to  COMPONENTS [10/2013 - ] 
  5. REPLACE BATTERY SMART UNIT. Refer to  COMPONENTS [10/2013 - ] 
scientia non olet · About LEMON Manuals