CHARGING SYSTEM, Diagnostic DTC:P162B

DTC Code DTC Name
P162B Lost Communication with Battery Monitor Module

DESCRIPTION

The ECM and battery state sensor assembly each detect reception malfunctions. A battery state sensor assembly reception malfunction detected by the battery state sensor assembly is sent to the ECM via LIN communication. If there is a malfunction in either the ECM or battery state sensor assembly, the ECM determines that there is a LIN communication malfunction and outputs a DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Memory
P162B Lost Communication with Battery Monitor Module

Diagnosis condition: Engine switch on (IG)

When the ECM cannot receive LIN communication, the battery state sensor assembly cannot receive LIN communication for approximately 33 seconds or more.

Other: 1 trip

  • Battery state sensor assembly

  • ECM

  • Wire harness or connector

  • Battery

 Not displayed 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.

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 C65 ECM connector.

    2. Disconnect the C55 battery state sensor assembly connector.

    3. Disconnect the C18 generator assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C65-61 (LIN) - C55-2 (LIN1) Always Below 1 Ω
      C65-61 (LIN) or C55-2 (LIN1) - Body ground

      Engine 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. B0057MCC04
      *a

      Front view of wire harness connector

      (to Battery State Sensor Assembly)

      Disconnect the C55 battery state sensor assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C55-1 (AM21) - Body ground Engine switch on (IG) 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 engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Turn the engine 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.


      Powertrain > Engine and ECT > Trouble Codes
      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