DTC P0516-769: Battery Temperature Sensor Circuit Low; DTC P0517-770: Battery Temperature Sensor Circuit High [09/2013 - ]: Description
- The battery thermometer sensor assembly (thermistor assembly) detects the auxiliary battery temperature. The resistance of the battery thermometer sensor assembly (thermistor assembly) built into the thermistor changes in accordance with changes in the auxiliary battery temperature. The lower the auxiliary battery temperature, the higher the battery thermometer sensor assembly (thermistor assembly) resistance. Conversely, the higher the temperature, the lower the resistance. The battery thermometer sensor assembly (thermistor assembly) is connected to the power management control ECU. A voltage of 5 V is supplied to the battery thermometer sensor assembly (thermistor assembly) from the THB terminal of the power management control ECU through its internal resistor R. This means that resistor R and the battery thermometer sensor assembly (thermistor assembly) are connected in series. The voltage at the THB terminal and the resistance value change in accordance with changes in the auxiliary battery temperature. Based on this signal, the power management control ECU reduces the charging current when the auxiliary battery temperature is high to protect the auxiliary battery.
HINT:
Characteristics of the battery thermometer sensor assembly (thermistor assembly) resistance (reference values) are as follows.
Terminal THB
(with Connector Disconnected)Resistance Ambient Temperature THB - E2 4.5 to 5.5 V 3.00 to 3.73 kΩ Approximately 10°C (50°F) 1.60 to 1.80 kΩ Approximately 25°C (77°F) 0.80 to 1.00 kΩ Approximately 40°C (104°F)
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0516 | 769 | Malfunction in the battery thermometer sensor assembly circuit (short to GND) |
|
| P0517 | 770 | Malfunction in the battery thermometer sensor assembly circuit (open or short to +B) |