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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Battery / Charging System (A25A-FXS) - Diagnostic Codes) >> Charging System >> DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [08/2020 - ] >> Procedure

DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [08/2020 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK BATTERY STATE SENSOR ASSEMBLY 
    1. Check installation condition of the battery state sensor assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY. Refer to  INSTALLATION [06/2018 - ] 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Check that the battery state sensor assembly connector is securely connected.

      OK

      The connector is securely connected.

    2. Disconnect the R6 battery state sensor assembly connector.
    3. Check the connector case and terminals for deformation or corrosion.

      OK

      No deformation or corrosion.

    4. Measure the voltage according to the value(s) in the table below.
      GTY809452Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Battery State Sensor Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      R6-1 (+B) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - BATTERY STATE SENSOR ASSEMBLY) 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY) 
    1. Disconnect the A32 hybrid vehicle control ECU connector.
    2. Disconnect the R6 battery state sensor assembly connector.
    3. Disconnect the C95 compressor with motor assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A32-17 (LIN3) - R6-2 (LIN) Always Below 1 Ω
      R6-2 (LIN), A32-17 (LIN3) or C95-3 (DOUT) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CLEAR DTCS 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    5. Check for DTCs, and note down any DTCs that are output.

      Powertrain > Hybrid Control > Trouble Codes 

    6. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    7. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

    8. Turn the power switch off and wait for at least 30 seconds or more.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CLEAR DTCS (AIR CONDITIONING SYSTEM) 
    1. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
    2. Check for DTCs, and note down any DTCs that are output.

      Body Electrical > Air Conditioner > Trouble Codes 

    3. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
    4. Clear the DTCs.

      Body Electrical > Air Conditioner > Clear DTCs 

    5. Turn the power switch off and wait for at least 30 seconds or more.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  6

  6. CHECK FOR DTCS 
    1. Turn the power switch on (READY) and wait for 17 minutes or more.
    2. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    3. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      DTC P162B87 is output. A
      DTCs are not output. B

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

    For NICKEL METAL HYDRIDE BATTERY:

    Refer to CHECK FOR INTERMITTENT PROBLEMS [06/2018 - ]

    For LITHIUM-ION BATTERY:

    Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2020 - ]

    Result: 

    A 

    See step  7

  7. CHECK FOR DTCS (AIR CONDITIONING SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
    5. Check for DTCs when the following conditions are met.

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      DTC B1498 is output. A
      DTCs are not output. B

    Result: 

    A 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    B 

    REPLACE BATTERY STATE SENSOR ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

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