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 (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 battery state sensor internal memory (battery identification data). |
·
Battery state sensor assembly ·
Battery ·
Wire harness or connector |
Charge warning is not displayed | DTC stored | SAE Code: P058A |
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.
Check installation condition of the battery state sensor assembly.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Check the charging system.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Check that the battery state sensor assembly connector is securely connected.
The connector is securely connected.
| *a | Front view of wire harness connector
(to Battery State Sensor Assembly) |
Disconnect the C86 battery state sensor assembly connector.
Check the connector case and terminals for deformation or corrosion.
No deformation or corrosion.
Measure the voltage according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| C86-1 (+B) - Body ground | Always | 11 to 14 V |
| Proceed to |
|---|
| OK |
| NG |
OK
NG