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: Ignition switch to ON

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

    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 hereClick 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 B93 ECM connector.

    2. Disconnect the A75 battery state sensor assembly connector.

    3. Disconnect the B90 generator assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B93-61 (LIN) - A75-2 (LIN)

      Always

      Below 1 Ω

      B93-61 (LIN) or A75-2 (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. A331105C19

      *a

      Front view of wire harness connector

      (to Battery State Sensor Assembly)

      Disconnect the A75 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

      A75-1 (+B) - Body ground

      Always

      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 to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine and ECT > Clear 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.

      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