HYBRID CONTROL SYSTEM, Diagnostic DTC:P1A8000, P1AD01B

DTC Code DTC Name
P1A8000 Hybrid/EV Battery Stack 1 Delta SOC High
P1AD01B Hybrid/EV Battery Block Circuit Resistance Above Threshold

DESCRIPTION

The battery voltage sensor 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 voltage sensor 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 the charging and discharging of the HV battery based to the driving condition.

Based on the HV battery voltage and current, the battery voltage sensor calculates the resistance and judges if the HV battery has deteriorated.

B004Q1KE06
B004QMGE01
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1A8000 Hybrid/EV Battery Stack 1 Delta SOC High

Difference in capacity between each battery block is larger than standard.

(2 trip detection logic)

  • HV battery

  • Hybrid battery terminal block

  • HV battery junction block assembly

 Comes on

Master Warning Light:

Comes on
P1AD01B Hybrid/EV Battery Block Circuit Resistance Above Threshold

Resistance of an HV battery block exceeds the specified value.

(1 trip detection logic)

  • HV battery

  • Hybrid battery terminal block

  • HV battery junction block assembly

 Comes on

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P1A8000

  • Internal Resistance 1 to 9

  • Hybrid Battery Block 1 to 9 Voltage *1

  • Hybrid Battery SOC
P1AD01B

Tech Tips


  • *1: Under normal conditions, the values of Hybrid Battery Block 1, 2, 8 and 9 Voltage will be approximately 16 V and Hybrid Battery Block 3, 4, 5, 6 and 7 Voltage will be approximately 32 V.

  • If there is a short or open in a battery block voltage detection line, the value of Hybrid Battery Block Voltage for the corresponding battery block will be lower than 8 V.

The following items can be helpful when performing repairs:



Tech Tips


  • This DTC can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes. (As 2 trip detection logic is also used, check for DTCs including pending DTCs.)

  • When the internal resistance of the HV battery increases, battery block voltage may drop.

  • If resistance is abnormal, the voltage of the battery blocks indicated by the DTCs are likely to decrease more than others during acceleration (discharging), and increase more during deceleration (charging).

  • In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:


    • Make sure the air intake port is not blocked.

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

    • Clean the No. 1 HV battery intake filter.


      • Clear the DTCs to reset the learning values even if no DTCs are stored.

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

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

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

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the GTS on.

  6. 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. (It is not necessary to maintain the vehicle speed at 40 km/h (25 mph) throughout the road test.)

    Tech Tips

    This DTC may not be stored if the vehicle is stopped or being driven at a steady speed.

  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  8. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

CAUTION / NOTICE / HINT

CAUTION:

When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

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.


      Powertrain > Hybrid Control > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      P0AFC00, P0AFC96, P308A12 or P0AFC62 is output A
      Other than above B

    5. Turn the power switch off.


    A

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    B

  2. CHECK FREEZE FRAME DATA


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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


      Powertrain > Hybrid Control > Trouble Codes

    4. Read the value of freeze frame data item "Number of Hybrid Battery Current Sensor Characteristics Determination" for DTC P1A8000 or P1AD01B.


      Powertrain > Hybrid Control
      Tester Display
      Number of Hybrid Battery Current Sensor Characteristics Determination
      Result
      Result Proceed to
      0 to 99 A
      Other than above B

    5. Turn the power switch off.


    B

    REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    A

  3. CHECK TOTAL DISTANCE DRIVEN


    1. Read the odometer to check the total distance the vehicle has been driven.

      Result
      Result Proceed to
      Total distance driven is less than 200000 km (124280 mile) A
      Total distance driven is 200000 km (124280 mile) or more Current total distance driven - total distance driven when hybrid battery terminal block replaced = less than 200000 km (124280 mile) *1
      Other than above B

      Tech Tips

      *1: If the hybrid battery terminal block has been replaced, use the total distance driven since it was replaced.


    A

    REPLACE HV BATTERY Click here

    B

  4. REPLACE HV BATTERY

    Tech Tips

    Click here

    Result
    Proceed to
    NEXT

    NEXT

    REPLACE HYBRID BATTERY TERMINAL BLOCK Click here