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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Hybrid Battery System - Diagnostic Codes (5 Of 5) & Symptom Tests) >> HYBRID BATTERY SYSTEM (for PHEV Model) >> DTC P2BE4-28: Hybrid/EV Battery Pack Current Sensor "C" Circuit Range/Performance Signal Bias Level Out of Range / Zero Adjustment Failure [12/2023 - ] >> Procedure

DTC P2BE4-28: Hybrid/EV Battery Pack Current Sensor "C" Circuit Range/Performance Signal Bias Level Out of Range / Zero Adjustment Failure [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  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
      "P2BE4-28" 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 [12/2023 - ] 

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    A 

    See step  2

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

    See step  2

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK NO. 2 TRACTION BATTERY DEVICE BOX ASSEMBLY (BATTERY CURRENT SENSOR (IBL)) 
    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 service information because this may cause a malfunction.

    2. Connect the SST.

      HINT: 

      Refer to Instructions for Connecting SST [12/2023 - ] 

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

      Procedure1

    5. Using a Toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.
      Tester Connection Condition
      j4-4 (VIB) - j4-14 (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.
      GTY1228277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Battery ECU Assembly)
    6. Using a Toyota electrical tester set to 4 V, measure the IBL voltage according to the value(s) in the table below.
      Tester Connection Condition
      j4-15 (IBL) - j4-14 (GIB) Ignition switch ON
      NOTE:

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

      GTY1228278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Battery ECU Assembly)
    7. Compare the measured values of the IBL terminal voltage and VIB terminal voltage using the following formula:
      Condition
      IBL voltage - 0.5 X VIB voltage = less than 0.05 V
      IBL voltage - 0.5 X VIB voltage = -0.05 V or higher

      Result

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

      Post-procedure1

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

    Result: 

    B 

    REPLACE NO. 2 TRACTION BATTERY DEVICE BOX ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    A 

    See step  4

  4. REPLACE BATTERY ECU ASSEMBLY 

    HINT: 

    Refer to REMOVAL [12/2023 - ]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. SIMULATION TEST 

    Pre-procedure1

    1. Clear the DTCs and freeze frame data.

      Powertrain > HV Battery > Clear DTCs 

      Procedure1

    2. Drive the vehicle on urban roads for approximately 10 minutes.

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. Turn the ignition switch off and wait for 2 minutes or more.
    4. Turn the ignition switch to ON and wait for 10 seconds or more.

    Result: 

    NEXT 

    See step  6

  6. CHECK DTC OUTPUT (HV BATTERY) 
    1. Check for DTCs.

      Powertrain > HV Battery > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output. A
      P2BE4-28 is also output. B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE NO. 2 TRACTION BATTERY DEVICE BOX ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

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