HYBRID BATTERY SYSTEM, Diagnostic DTC:P1A43-123

DTC Code DTC Name
P1A43-123 Hybrid Battery Pack Internal Electrical Resistance High Stack "D"

DESCRIPTION

Refer to the Description for DTC P1A40-123 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P1A43 123 Difference in voltage between battery blocks is larger than the standard (1 trip detection)

  • No. 4 hybrid vehicle supply stack sub-assembly

Tech Tips

DTC will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTC.

INSPECTION PROCEDURE

CAUTION:


  • When disposing of HV batteries and hybrid vehicle supply stack sub-assemblies, make sure to return them through an authorized collection agent who is capable of handling them safely. If they are returned via the manufacturer specified route, they will be returned properly and in a safe manner by an authorized collection agent.

  • Before returning the HV battery, make sure to perform recovery inspection Click here.

  • Before returning the hybrid vehicle supply stack sub-assembly, make sure to perform recovery inspection Click here.

  • Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and hybrid vehicle supply stack sub-assemblies.

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. Check if DTCs are output.

      Result
      Result Proceed to
      P1A43-123 only is output. A
      DTCs other than P1A43-123 are output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID BATTERY SYSTEM) Click here

    A

  2. 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
      A0040WVE05

      Tech Tips

      When an internal malfunction occurs in the battery smart unit, this symptom (difference in voltage of 0.6 V or more for all 4 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.

    12. Disconnect the GTS from the DLC3.


    B

    REPLACE NO. 4 HYBRID VEHICLE SUPPLY STACK SUB-ASSEMBLY Click here

    A

    REPLACE BATTERY SMART UNIT Click here