CHARGING SYSTEM, Diagnostic DTC:P058A

DTC Code DTC Name
P058A Battery Monitor Module Performance

DESCRIPTION

The battery state sensor assembly detects the voltage, current and temperature of the battery. The charging condition is calculated from the voltage and current and output to the ECM. The ECM sends an instruction to generate voltage to the generator assembly based on that signal. Also, the battery temperature is calculated from the change in the resistance value of the thermistor built into the battery state sensor assembly and output to the ECM. The ECM reduces the charging current when the battery is hot and protects the battery based on this signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P058A

Battery Monitor Module Performance

Diagnosis condition: Ignition switch to ON

Malfunction status:

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

  • Difference between maximum and minimum current value is 0.0305 A or less for 100 seconds or more.

  • Current detection circuit malfunction condition is received.

  • Battery temperature is 105°C (221°F) or higher or -40°C (-40°F) or lower for 3.2 seconds or more.

  • Temperature detection circuit malfunction condition is received.

  • Voltage value remains at 15.98 V or higher or 6.0 V or less for 3.2 seconds or more.

  • Voltage detection circuit malfunction condition is received.

  • Battery state sensor assembly internal memory write malfunction (battery identification information) occurs.

Other: 1 trip

  • Battery state sensor assembly installation condition malfunction

  • Battery state sensor assembly

  • Wire harness or connector

  • Battery

Not displayed

DTC stored

WIRING DIAGRAM

A331074E05

CAUTION / NOTICE / HINT

Note:

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

  • When P162B (Lost Communication with Battery Monitor Module) is output at the same time, perform the inspection for P162B (Lost Communication with Battery Monitor Module) first.

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PROCEDURE

  1. CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION

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

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    Result

    Proceed to

    OK

    NG
    NG

    INSTALL BATTERY STATE SENSOR ASSEMBLY CORRECTLY

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    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 (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
    OK

    REPLACE BATTERY STATE SENSOR ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR