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HYBRID BATTERY SYSTEM, Diagnostic DTC:P0ABF28

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DTC Code DTC Name
P0ABF28 Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure
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DESCRIPTION

Refer to the description for DTC P0ABF11.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0ABF28 Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure

The offset value of the battery current sensor is excessively large.

(1 trip detection logic)

  • HV battery junction block assembly

  • Battery ECU assembly

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
Table 1. Related Data List
DTC No. Data List
P0ABF28 Hybrid Battery Current*1

*1: When the power switch is on (IG), normally the HV battery current does not flow. If the HV battery current value is above the specification, this DTC will be stored.

Tip:

  • Make sure to perform Current Sensor Offset Learning after replacing a battery current sensor.

  • This DTC may be output if Current Sensor Offset Learning has not been completed.

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CONFIRMATION DRIVING PATTERN

Tip:

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.

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  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 for approximately 10 minutes.

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

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

  9. With power switch on (IG) and wait for 10 seconds or more.

  10. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.

  11. Check the DTC judgment result.

    Tip:

    • 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, perform driving pattern again.

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WIRING DIAGRAM

Refer to the wiring diagram for DTC P0ABF11.

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CAUTION / NOTICE / HINT

CAUTION:

  • B004STG

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

  • B004Y5N

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • B004SX1

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B004W3JC06
    *a Without waiting for 10 minutes

    After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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    Tip:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.

  • Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.

    If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

Note:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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PROCEDURE


  1. Click here

    CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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

    4. Check for DTCs.


      1. Powertrain > HV Battery > Trouble Codes



      1. Powertrain > Hybrid Control > Trouble Codes


      Result
      Result Proceed to
      "P0ABF28" only is output, or DTCs except the ones in the table below are also output. A
      DTCs of hybrid battery system in the table below are output. B
      DTCs of hybrid control system in the table below are output. C
      System Relevant DTC
      Hybrid battery system P060A47 Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060B49 Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
      P060687 Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
      P062F46 Hybrid/EV Battery Energy Control Module EEPROM Calibration / Parameter Memory Failure
      Hybrid control system P0A1F94 Hybrid/EV Battery Energy Control Module Unexpected Operation

    5. Turn the power switch off.


  2. Click here

    CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - HV BATTERY JUNCTION BLOCK ASSEMBLY)

    Result
    Proceed to
    OK
    NG
    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper No. 1 hybrid battery cover sub-assembly.

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    3. B004V2KN04

      Disconnect the e4 battery ECU assembly connector.

      Note:

      Before disconnecting the connector, check that it is not loose or disconnected.

    4. B004XPQN04

      Disconnect the e1 battery current sensor connector from the HV battery junction block assembly.

      Note:

      Before disconnecting the connector, check that it is not loose or disconnected.

    5. B004UNQC04
      *a

      Front view of wire harness connector

      (to HV Battery Junction Block Assembly (Battery Current Sensor))
      *b

      Rear view of wire harness connector

      (to Battery ECU Assembly)

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      e4-19(VIB) - e1-1(VIB) Always Below 1 Ω
      e4-38(IB1) - e1-2(IB1) Always Below 1 Ω
      e4-37(GIB) - e1-3(GIB) Always Below 1 Ω
      e4-18(IB0) - e1-4(IB0) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      e4-19(VIB) or e1-1(VIB) - Body ground and other terminals Always 10 kΩ or higher
      e4-38(IB1) or e1-2(IB1) - Body ground and other terminals Always 10 kΩ or higher
      e4-37(GIB) or e1-3(GIB) - Body ground and other terminals Always 10 kΩ or higher
      e4-18(IB0) - e1-4(IB0) - Body ground and other terminals Always 10 kΩ or higher

    6. Reconnect the e1 battery current sensor connector to the HV battery junction block assembly.

    7. Reconnect the e4 battery ECU assembly connector.

    8. Install the upper No. 1 hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS AND CONNECTOR

  3. Click here

    CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB0))

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper HV battery cover panel.

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    3. B004WQBC04
      *a

      Front view of wire harness connector

      (No. 2 HV Battery Pack Wire Connector)

      Apply auxiliary battery voltage between No. 2 HV battery pack wire connector terminals Le1-14 (IGCT) - Le1-1 (GND).

      Note:

      Make sure that the battery positive and battery negative do not contact one another.

    4. B004VUYC08
      *a

      Component with harness connected

      (to HV Battery Junction Block Assembly (Battery Current Sensor))

      Using a Toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

      Tester Connection Tester Connection
      e1-1(VIB) - e1-3(GIB)

      Auxiliary battery positive (+) → Le1 -14 (IGCT)

      Auxiliary battery negative (-) → Le1 -1 (GND)
      Note:

      Be sure to set the Toyota electrical tester to 40 V when performing this test.

    5. B004VUYC10
      *a

      Component with harness connected

      (to HV Battery Junction Block Assembly (Battery Current Sensor))

      Using a Toyota electrical tester set to 4 V, measure the IB0 voltage according to the value(s) in the table below.

      Tester Connection Tester Connection
      e1-4(IB0) - e1-3(GIB)

      Auxiliary battery positive (+) → Le1 -14 (IGCT)

      Auxiliary battery negative (-) → Le1 -1 (GND)
      Note:

      Be sure to set the Toyota electrical tester to 4 V when performing this test.

    6. Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:

      IB0 voltage - 0.56 X VIB Voltage = less than 0.084 V
      IB0 voltage - 0.56 X VIB Voltage = -0.084 V or higher
      Result
      Result Proceed to
      Within the specified range above A
      Other than above B

    7. Disconnect the Le1 connector of the No. 2 HV battery pack wire from the auxiliary battery.

    8. Install the upper HV battery cover panel.


  4. Click here

    CHECK HV BATTERY JUNCTION BLOCK ASSEMBLY (BATTERY CURRENT SENSOR (IB1))

    CAUTION:

    Be sure to wear insulated gloves and protective goggles.


    1. Check that the service plug grip is not installed.

      Note:

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper HV battery cover panel.

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    3. B004WQBC04
      *a

      Front view of wire harness connector

      (No. 2 HV Battery Pack Wire Connector)

      Apply auxiliary battery voltage between No. 2 HV battery pack wire connector terminals Le1-14 (IGCT) - Le1-1 (GND).

      Note:

      Make sure that the battery positive and battery negative do not contact one another.

    4. B004VUYC08
      *a

      Component with harness connected

      (to HV Battery Junction Block Assembly (Battery Current Sensor))

      Using a Toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

      Tester Connection Tester Connection
      e1-1(VIB) - e1-3(GIB)

      Auxiliary battery positive (+) → Le1 -14 (IGCT)

      Auxiliary battery negative (-) → Le1 -1 (GND)
      Note:

      Be sure to set the Toyota electrical tester to 40 V when performing this test.

    5. B004VUYC09
      *a

      Component with harness connected

      (to HV Battery Junction Block Assembly (Battery Current Sensor))

      Using a Toyota electrical tester set to 4 V, measure the IB1 voltage according to the value(s) in the table below.

      Tester Connection Tester Connection
      e1-2(IB1) - e1-3(GIB)

      Auxiliary battery positive (+) → Le1 -14 (IGCT)

      Auxiliary battery negative (-) → Le1 -1 (GND)
      Note:

      Be sure to set the Toyota electrical tester to 4 V when performing this test.

    6. Compare the measured values of the IB1 terminal voltage and VIB terminal voltage using the following formula:

      Condition
      IB1 voltage - 0.44 X VIB Voltage = less than 0.078 V
      IB1 voltage - 0.44 X VIB Voltage = -0.078 V or higher
      Result
      Result Proceed to
      Within the specified range above. A
      Other than above B

    7. Disconnect the Le1 connector of the No. 2 HV battery pack wire from the auxiliary battery.

    8. Install the upper HV battery cover panel.


  5. Click here

    REPLACE BATTERY ECU ASSEMBLY

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    Result
    Proceed to
    NEXT

    • NEXT

      REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLYClick here