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/ Stop and Start System

WIRING DIAGRAM

A331106E29

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 B208 ECM connector.

    2. Disconnect the A172 battery state sensor assembly connector.

    3. Disconnect the B184 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

      A172-2 (LIN) or B184-2 (LIN) - B208-61 (LIN)

      Always

      Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection

      Condition

      Specified Condition

      A172-2(LIN), B184-2 (LIN) or B208-61 (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 A172 battery state sensor assembly connector.

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

      OK

      No deformation or corrosion.

    4. A331105C28

      *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

      A172-1 (+B) - Body ground

      Always

      11 to 14 V

    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CLEAR DTCS

    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 FOR DTCS

    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 hereClick here

    C

    CHECK FOR INTERMITTENT PROBLEMS

    Click here