DTC P058A-01: Battery Monitor Module General Electrical Failure [10/2022 - 10/2024]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
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 | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P058A-01 | Battery Monitor Module General Electrical Failure | Any of the following conditions is met with the ignition switch ON. (1 trip detection logic):
|
|
Does not come on | Charge warning light does not come on | Engine | A | SAE Code: P058A |
DTC DETECTION CONDITIONS
| Vehicle Condition | |||||||
| Pattern 1 | Pattern 2 | Pattern 3 | Pattern 4 | Pattern 5 | Pattern 6 | ||
| Diagnosis Condition | Ignition switch ON | ◦ | ◦ | ◦ | ◦ | ◦ | ◦ |
| Malfunction Status | Current value is 999.939 A or more | ◦ | - | - | - | - | - |
| Current value is -1000 A or less | - | ◦ | - | - | - | - | |
| Current detection circuit malfunction signal is received | - | - | - | ◦ | - | - | |
| Battery temperature is 105°C or more | - | - | - | - | ◦ | - | |
| Battery temperature is -40°C or less | - | - | - | - | - | ◦ | |
| Detection Time | 3.2 seconds or more | 3.2 seconds or more | - | 3.2 seconds or more | 12.288 seconds or more | 12.288 seconds or more | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |
DTC DETECTION CONDITIONS
| Vehicle Condition | ||||||
| Pattern 7 | Pattern 8 | Pattern 9 | Pattern 10 | Pattern 11 | ||
| Diagnosis Condition | Ignition switch ON | ◦ | ◦ | ◦ | ◦ | ◦ |
| Malfunction Status | Temperature detection circuit malfunction signal is received | ◦ | - | - | - | - |
| Voltage value remains at 15.98 V or more | - | ◦ | - | - | - | |
| Voltage value remains at 6.0 V or less | - | - | ◦ | - | - | |
| Voltage detection circuit malfunction signal is received | - | - | - | ◦ | - | |
| Writing error occurs in the battery state sensor internal memory (battery identification data) | - | - | - | - | ◦ | |
| Detection Time | 12.288 seconds or more | 3.2 seconds or more | 3.2 seconds or more | 3.2 seconds or more | - | |
| Number of Trips | 1 trip | 1 trip | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.