Toyota Yaris: Charging System / Battery Monitor Module General Electrical Failure (P058A01)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Power Source & Network / G16e-gts (battery / Charging) / Charging System / Battery Monitor Module General Electrical Failure (P058A01)

DESCRIPTION

The battery state sensor assembly detects the voltage, current and temperature of the auxiliary 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 auxiliary 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 auxiliary battery is hot and protects the auxiliary battery based on this signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

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 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.
  • Auxiliary battery temperature is 105°C or higher or -40°C 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.
  • Battery state sensor assembly
  • Wire harness or connector
  • Auxiliary battery

Does not come on

SAE Code: P058A

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

PROCEDURE

1.

CHECK BATTERY STATE SENSOR ASSEMBLY INSTALLATION

HINT:

Click here

NG

INSTALL BATTERY STATE SENSOR ASSEMBLY CORRECTLY

OK

2.

CHECK CHARGING SYSTEM

HINT:

Click here

NG

REPAIR OR REPLACE CHARGING SYSTEM

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Disconnect the battery state sensor assembly connector.

*a

Front view of wire harness connector

(to Battery State Sensor Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O68-3 (+B) - Body ground

Always

11 to 14 V

O68-1 (RBAT) - Body ground

Always

11 to 14 V

OK

REPLACE BATTERY STATE SENSOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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