CHARGING SYSTEM(w/ Stop And Start System), Diagnostic DTC:P162B

DTC Code DTC Name
P162B Lost Communication with Battery Monitor Module

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
P162B Lost Communication with Battery Monitor Module

Battery state sensor assembly or ECM communication stops for 33 seconds or more with the ignition switch ON.

(1 trip detection logic)

  • Battery state sensor assembly

  • ECM

  • Wire harness or connector

 Charge warning light does not come on DTC stored

WIRING DIAGRAM

Refer to DTC P161A (Lost Communication with Alternator).

Click here

CAUTION / NOTICE / HINT

Note


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

  • Before replacing the ECM, refer to Service Bulletin.

PROCEDURE


  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION CONDITION


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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    INSTALL 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 B112 ECM connector.

    2. Disconnect the B114 battery state sensor assembly connector.

    3. Disconnect the B111 generator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B112-61 (LIN) - B114-2 (LIN) Always Below 1 Ω
      B112-61 (LIN) or B114-2 (LIN) - Body ground

      Ignition switch off

      (while LIN communication is stopped)

      		 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. A004B6UC92
      *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 Switch Condition Specified Condition
      B114-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. READ OUTPUT DTC


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

    5. Turn the ignition switch off and wait at least 30 seconds.

    6. Start the engine and wait 17 minutes or more.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    8. Read the DTCs.

      Result
      Result Proceed to
      DTC P162B is output A
      P161A and P162B are output B
      No DTC is output C

    A

    REPLACE BATTERY STATE SENSOR ASSEMBLY Click here

    B

    REPLACE ECM Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here