CHARGING SYSTEM, Diagnostic DTC:P162B87

DTC Code DTC Name
P162B87 Lost Communication with Battery Monitor Module Missing Message

DESCRIPTION

The ECM communicates with the battery state sensor assembly via LIN communication. If a LIN communication error is detected, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory Note
P162B87 Lost Communication with Battery Monitor Module Missing Message

Battery state sensor assembly or ECM communication stops for approximately 17 minutes or more with the ignition switch ON

(1 trip detection logic)

  • Wire harness or connector

  • Battery state sensor assembly

  • ECM

 Charge warning light does not come on DTC stored

  • SAE Code: P162B

  • w/ Battery Current Sensor

WIRING DIAGRAM

A001UKWE84
*a from Battery
*b Battery State Sensor Assembly
*c Generator Assembly
*d LIN Communication Line

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION


    1. Check installation condition of the battery state sensor assembly.

      Result
      Result
      OK
      NG

    NG

    INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY Click here

    OK

  2. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. CHECK HARNESS AND CONNECTOR (ECM - BATTERY STATE SENSOR ASSEMBLY)


    1. Disconnect the C62 ECM connector.

    2. Disconnect the C20 battery state sensor assembly connector.

    3. Disconnect the C37 generator assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      C20-2 (LIN) or C37-2 (LIN) - C62-61 (LIN) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      C20-2(LIN), C37-2 (LIN) or C62-61 (LIN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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 battery state sensor assembly connector.

    3. Check the connector case and terminals for deformation or corrosion.

      OK
      No deformation or corrosion.
    4. A001XWWC82
      *a

      Front view of wire harness connector

      (to Battery State Sensor Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C20-1 (+B) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs, and note down any DTCs that are output.


      Powertrain > Engine > Trouble Codes

    6. Enter the following menus: Powertrain / Engine / Trouble Codes.

    7. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    8. Turn the ignition switch off, wait 30 seconds.

      Result
      Proceed to
      NEXT

    NEXT

  6. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Allow the engine to idle for approximately 17 minutes or more.

    4. Turn the GTS on.

    5. Enter the following menus: Powertrain / Engine / Trouble Codes.

    6. Check for DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      Only DTC P162B87 is output A
      DTC P161A87 and P162B87 are output. B
      DTCs are not output. C

    A

    REPLACE BATTERY STATE SENSOR ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here