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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Battery / Charging System (A25A-FXS) - Diagnostic Codes & Symptom Tests) >> Charging System >> DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [11/2023 - ] >> Procedure

DTC P162B-87: Lost Communication with Battery Monitor Module Missing Message [11/2023 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION 

    HINT: 

    Refer to INSTALLATION [11/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    INSTALL BATTERY STATE SENSOR ASSEMBLY CORRECTLY. Refer to  INSTALLATION [11/2023 - ] 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 

    HINT: 

    Refer to the electronic circuit inspection procedure.

    Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

    Pre-procedure1

    1. Turn the ignition switch off.
    2. Check that the battery state sensor assembly connector is securely connected.

      OK

      The connector is securely connected.

    3. Disconnect the M107 battery state sensor assembly connector.
    4. Check the connector case and terminals for deformation or corrosion.

      OK

      No deformation or corrosion.

      Procedure1

    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      M107-3 (+B) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    6. None

    Result: 

    NG 

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

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY) 

    HINT: 

    Refer to the electronic circuit inspection procedure.

    Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [12/2019 - ]

    Pre-procedure1

    1. Disconnect the A32 hybrid vehicle control ECU connector.
    2. Disconnect the M107 battery state sensor assembly connector.
    3. Disconnect the C65 compressor with motor assembly connector.

      Procedure1

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      A32-28 (LIN3) - M107-2 (LIN) Always Below 1 Ω
      A32-28 (LIN3), M107-2 (LIN) or C65-3 (DOUT) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    5. None

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (HYBRID VEHICLE CONTROL ECU - BATTERY STATE SENSOR ASSEMBLY) 

    Result: 

    OK 

    See step  4

  4. CHECK FOR DTCS 
    1. Check for DTCs, and note down any DTCs that are output.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CLEAR DTCS 

    Pre-procedure1

    1. None

      Procedure1

    2. Clear the DTCs.

      Powertrain > Hybrid Control > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. Turn the ignition switch off and wait for 30 seconds or more.

    Result: 

    NEXT 

    See step  6

  6. CHECK FOR DTCS (AIR CONDITIONING SYSTEM) 
    1. Check for DTCs, and note down any DTCs that are output.

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. CLEAR DTCS (AIR CONDITIONING SYSTEM) 

    Pre-procedure1

    1. None

      Procedure1

    2. Clear the DTCs.

      Body Electrical > Air Conditioner > Clear DTCs 

      Result

      Proceed to
      NEXT

      Post-procedure1

    3. Turn the ignition switch off and wait for 30 seconds or more.

    Result: 

    NEXT 

    See step  8

  8. CHECK FOR DTCS 

    Pre-procedure1

    1. Turn the ignition switch to ON (READY) and wait for 17 minutes or more.

      Procedure1

    2. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P162B-87 is output A
      DTCs are not output B

      Post-procedure1

    3. None

    Result: 

    B 

    CHECK FOR INTERMITTENT PROBLEMS 

    For AWD: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

    Result: 

    A 

    See step  9

  9. CHECK FOR DTCS (AIR CONDITIONING SYSTEM) 
    1. Check for DTCs.

      Body Electrical > Air Conditioner > Trouble Codes 

      Result

      Result Proceed to
      B1498-87 is output A
      DTCs are not output B

    Result: 

    A 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [11/2023 - ] 

    Result: 

    B 

    REPLACE BATTERY STATE SENSOR ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

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