CHARGING SYSTEM, Diagnostic DTC:P058A01

DTC Code DTC Name
P058A01 Battery Monitor Module General Electrical Failure

DESCRIPTION

The battery state sensor assembly detects the voltage, current and temperature of the battery. The battery state sensor assembly calculates State of Charge (SOC) based on the voltage and current of the battery and sends it to the ECM. Based on the signals received, the ECM adjusts the charging voltage of the generator assembly.

The battery state sensor assembly calculates the battery temperature based on changes in resistance of a built-in thermistor and sends it to the ECM. The ECM reduces the amount of charging current based on this signal in order to protect the battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

Note

P058A01

Battery Monitor Module General Electrical Failure

Any of the following conditions is met with the ignition switch ON. (1 trip detection logic):

  • Current is 999.939 A or more, or -1000 A or less for 3.2 seconds or more.

  • The difference between the maximum and minimum current is 0.0305 A or less for 100 seconds or more.

  • A current detection circuit malfunction signal is received.

  • The battery temperature is 105°C or more or -40°C or less for 3.2 seconds or more.

  • A temperature detection circuit malfunction signal is received.

  • Voltage is 15.98 V or more, or 6.0 V or less for 3.2 seconds or more.

  • A voltage detection circuit malfunction signal is received.

  • A writing error occurs in the battery state sensor internal memory (battery identification data).

  • Battery state sensor assembly

  • Battery

  • Wire harness or connector

Charge warning light does not come on

DTC stored

  • SAE Code: P058A

  • w/ Stop and Start System

WIRING DIAGRAM

A348067E06

CAUTION / NOTICE / HINT

Note:

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

  • When P162B87 (Lost Communication with Battery Monitor Module Missing Message) is output at the same time, perform the inspection for P162B87 (Lost Communication with Battery Monitor Module Missing Message) first.

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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

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    OK

  2. CHECK CHARGING SYSTEM

    1. Check the charging system.

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    Result

    Result

    OK

    NG
    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  3. 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. A331105C27

      *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
    OK

    REPLACE BATTERY STATE SENSOR ASSEMBLY

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR