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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Hybrid Battery System (HEV) - Diagnostic Codes (1 Of 2)) >> HYBRID BATTERY SYSTEM (for M20A-FXS) >> DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [12/2022 - ] >> Procedure

DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [12/2022 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL) 

    Pre-procedure1

    1. None

      Procedure1

    2. Check for DTCs.

      Powertrain > HV Battery > Trouble Codes 

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      "P0ABF-28" 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 P060A-47 Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure
      P060B-49 Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure
      P0606-87 Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message
      P062F-46 Hybrid/EV Battery Energy Control Module EEPROM Calibration / Parameter Memory Failure
      Hybrid control system P0A1F-94 Hybrid/EV Battery Energy Control Module Unexpected Operation

      Post-procedure1

    3. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2022 - ] 

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2022 - ]

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 TRACTION BATTERY DEVICE BOX) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    Pre-procedure1

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Disconnect the battery ECU assembly connector.
      NOTE:

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

      GTY1151874Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the battery current sensor connector from the No. 1 traction battery device box.
      NOTE:

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

      GTY1155965Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Procedure1

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

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      R40-6 (IB1) - R47-2 (IB1) Ignition switch off Below 1 Ω
      R40-18 (GIB) - R47-3 (GIB) Ignition switch off Below 1 Ω
      R40-5 (IB0) - R47-4 (IB0) Ignition switch off Below 1 Ω
      R40-17 (VIB) - R47-1 (VIB) Ignition switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      R40-6 (IB1) or R47-2 (IB1) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      R40-18 (GIB) or R47-3 (GIB) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      R40-5 (IB0) or R47-4 (IB0) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      R40-17 (VIB) or R47-1 (VIB) - Body ground and other terminals Ignition switch off 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. Reconnect the battery current sensor connector to the No. 1 traction battery device box.
    6. Reconnect the battery ECU assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK NO. 1 TRACTION BATTERY DEVICE BOX (BATTERY CURRENT SENSOR (IB0)) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    Pre-procedure1

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Connect the cable to the negative (-) auxiliary battery terminal.
    3. Turn the ignition switch to ON.

      Procedure1

    4. 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
      R47-1 (VIB) - R47-3 (GIB) Ignition switch ON
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • Be sure to set the toyota electrical tester to 40 V when performing this test.
      GTY1143200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 1 Traction Battery Device Box (Battery Current Sensor))
    5. 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
      R47-4 (IB0) - R47-3 (GIB) Ignition switch ON
      NOTE:

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

      GTY1143202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 1 Traction Battery Device Box (Battery Current Sensor))
    6. Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:
      IB0 voltage - 0.584 X VIB Voltage = less than 0.060 V
      IB0 voltage - 0.584 X VIB Voltage = -0.060 V or higher

      Result

      Result Proceed to
      Within the specified range above A
      Other than above B

      Post-procedure1

    7. Turn the ignition switch off.
    8. Disconnect the cable from the negative (-) auxiliary battery terminal.

    Result: 

    B 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX 

    Refer to REMOVAL [12/2022 - ]

    Result: 

    A 

    See step  4

  4. CHECK NO. 1 TRACTION BATTERY DEVICE BOX (BATTERY CURRENT SENSOR (IB1)) 
    WARNING:

    Be sure to wear insulated gloves.

    Pre-procedure1

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

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Connect the cable to the negative (-) auxiliary battery terminal.
    3. Turn the ignition switch to ON.

      Procedure1

    4. 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
      R47-1 (VIB) - R47-3 (GIB) Ignition switch ON
      NOTE:
      • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
      • Be sure to set the toyota electrical tester to 40 V when performing this test.
      GTY1143200Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 1 Traction Battery Device Box (Battery Current Sensor))
    5. 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
      R47-2 (IB1) - R47-3 (GIB) Ignition switch ON
      NOTE:

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

      GTY1143199Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (No. 1 Traction Battery Device Box (Battery Current Sensor))
    6. Compare the measured values of the IB1 terminal voltage and VIB terminal voltage using the following formula:
      Condition
      IB1 voltage - 0.416 X VIB Voltage = less than 0.060 V
      IB1 voltage - 0.416 X VIB Voltage = -0.060 V or higher

      Result

      Result Proceed to
      Within the specified range above. A
      Other than above B

      Post-procedure1

    7. Turn the ignition switch off.
    8. Disconnect the cable from the negative (-) auxiliary battery terminal.

    Result: 

    B 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX 

    Refer to REMOVAL [12/2022 - ]

    Result: 

    A 

    See step  5

  5. REPLACE BATTERY ECU ASSEMBLY 

    HINT: 

    Refer to REMOVAL [12/2022 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  6

  6. SIMULATION TEST 

    Pre-procedure1

    1. None

      Procedure1

    2. Clear the DTCs and freeze frame data.

      Powertrain > HV Battery > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. Drive the vehicle on urban roads for approximately 10 minutes.
    4. Turn the ignition switch off and wait for 2 minutes or more.
    5. Turn the ignition switch to ON and wait for 10 seconds or more.

    Result: 

    NEXT 

    See step  7

  7. CHECK DTC OUTPUT (HV BATTERY) 

    Pre-procedure1

    1. None

      Procedure1

    2. Check for DTCs.

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output. A
      P0ABF-28 is also output. B

      Post-procedure1

    3. Turn the ignition switch off.
    4. None

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE NO. 1 TRACTION BATTERY DEVICE BOX 

    Refer to REMOVAL [12/2022 - ]

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