Lexus ES manuals

Lexus ES: Auxiliary Battery Monitor Module Range/Performance (P058A01)

Lexus ES (XZ10) Service Manual / Power Source & Network / A25a-fxs (battery / Charging) / Charging System / Auxiliary Battery Monitor Module Range/Performance (P058A01)

DESCRIPTION

The battery state sensor assembly detects the auxiliary voltage, current and temperature of the auxiliary battery. The battery state sensor assembly calculates State of Charge (SOC) based on the voltage and current of the auxiliary battery and sends it to the hybrid vehicle control ECU. Based on the signals received, the hybrid vehicle control ECU adjusts the charging voltage of the DC/DC converter.

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P058A01

Auxiliary Battery Monitor Module Range/Performance

Any of the following conditions is met with the power switch on (IG). (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 auxiliary battery temperature is 105°C (221°F) or more, or -40°C (-40°F) 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 auxiliary battery state sensor internal memory (battery identification data).
  • Battery state sensor assembly
  • Auxiliary battery
  • Wire harness or connector

Charge warning is not displayed

DTC stored

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • 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 troubleshooting for P162B87 (Lost Communication with Battery Monitor Module Missing Message) first.

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PROCEDURE

1.

CHECK BATTERY STATE SENSOR ASSEMBLY

(a) Check installation condition of the battery state sensor assembly.

NG

INSTALL THE BATTERY STATE SENSOR ASSEMBLY CORRECTLY

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Check that the battery state sensor assembly connector is securely connected.

OK:

The connector is securely connected.

(b) Disconnect the R6 battery state sensor assembly connector.

(c) Check the connector case and terminals for deformation or corrosion.

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

R6-1 (+B) - Body ground

Power switch off

11 to 14 V

*a

Front view of wire harness connector

(to Battery State Sensor Assembly)
OK

REPLACE BATTERY STATE SENSOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - BATTERY STATE SENSOR ASSEMBLY)

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