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Home >> Toyota >> 2023 >> RAV4 XLE, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Hybrid Control System (2WD, W/ Nickel Metal Hydride Battery) - Diagnostic Codes (3 Of 6)) >> HYBRID CONTROL SYSTEM (for 2WD with NICKEL METAL HYDRIDE BATTERY) >> DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [11/2018 - 08/2020] >> Procedure

DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [11/2018 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota RAV4 and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    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 for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      "P0AFC-00, P0AFC-96 or P0A95-63" is not output. A
      "P0AFC-00, P0AFC-96 or P0A95-63" is also output. B
    5. Turn the power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 06/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 08/2020]

    Result: 

    A 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY) 

    See step  3 [11/2018 - 06/2020], or see step  3 [06/2020 - 08/2020]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE HYBRID BATTERY THERMISTOR 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    OK 

    See step  3

  3. READ VALUE USING GTS (HYBRID/EV BATTERY CURRENT, HYBRID /EV BATTERY CURRENT SENSOR POWER SUPPLY VOLTAGE) 
    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 appropriate service information because this may cause a malfunction.

    2. Remove the No. 1 HV battery cover panel RH.

      Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 06/2020] , or refer to REMOVAL [06/2020 - 08/2020]

    3. Disconnect the z20 battery current sensor connector.
      GTY944075Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the cable to the negative (-) auxiliary battery terminal.
    5. Turn the ignition switch to ON.

      Procedure1

    6. Read the Data List.

      Powertrain > Hybrid Control > Data List 

      Tester Display
      Hybrid/EV Battery Current
      Hybrid/EV Battery Current Sensor Power Supply Voltage

      Standard

      Data List Specified Condition
      Hybrid/EV Battery Current Below -200 A
      Hybrid/EV Battery Current Sensor Power Supply Voltage 4.5 to 5.5 V

      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.
    9. Reconnect the z20 battery current sensor connector.

    Result: 

    B 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    A 

    See step  4

  4. REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 06/2020] , or refer to REMOVAL [06/2020 - 08/2020]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. SIMULATION TEST 
    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. Clear the DTCs and freeze frame data.

      Powertrain > Hybrid Control > Clear DTCs 

    5. Drive the vehicle on urban roads for approximately 10 minutes.
    6. Turn the power switch off and wait for 2 minutes or more.
    7. Turn the power switch on (IG) and wait for 10 seconds or more.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. RECONFIRM DTC OUTPUT (HYBRID CONTROL) 
    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. Read output DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

    5. Turn the power switch off.

      Result

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

    Result: 

    A 

    COMPLETED 

    Result: 

    B 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

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