DTC P0516-769: Battery Temperature Sensor Circuit Low; DTC P0517-770: Battery Temperature Sensor Circuit High [11/2016 - ]: Description
The thermistor assembly detects the auxiliary battery temperature. The resistance of the 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 thermistor assembly resistance. Conversely, the higher the temperature, the lower the resistance. The thermistor assembly is connected to the hybrid vehicle control ECU assembly. A voltage of 5 V is supplied to the thermistor assembly from the THB terminal of the hybrid vehicle control ECU assembly through its internal resistor R. This means that resistor R and the 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 hybrid vehicle control ECU assembly reduces the charging current when the auxiliary battery temperature is high to protect the auxiliary battery.
HINT:
Characteristics of the 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. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P0516-769 | Battery Temperature Sensor Circuit Low | Malfunction in the thermistor assembly circuit (short to ground) (1 trip detection logic) |
|
Does not come on | Master Warning Light: Does not come on |
| P0517-770 | Battery Temperature Sensor Circuit High | Malfunction in the thermistor assembly circuit (open or short to +B) (1 trip detection logic) |
|
Does not come on | Master Warning Light: Does not come on |
| DTC No. | ECU Data List |
|---|---|
| P0516-769 | Auxiliary Batt Temperature |
| P0517-770 |