DT Codes . com
DTC - Diagnostic Trouble Codes information

P0516

Powertrain Codes

P0516 - CHRYSLER - Battery Temperature Sensor Circuit Low

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Possible engine overheating

Possible Causes

- Faulty battery temperature sensor - Short in battery temperature sensor circuit - Faulty ECM

When Detected

Battery temperature sensor output value is 0.2 V or less for 0.5 seconds or more with the ignition switch ON

Description

The battery temperature sensor installed on the battery current sensor detects battery temperature. A thermistor is integrated into the battery temperature sensor, and the resistance in the battery temperature sensor changes according to the battery temperature. The resistance of the thermistor in the battery temperature sensor decreases as the battery temperature increases. The resistance increases as the temperature decreases. The battery temperature sensor is connected to the ECM. The ECM supplies 5 V from the THB terminal to the battery temperature sensor through resistor R. The battery temperature sensor and resistor R are connected in series. This results in fluctuations in the voltage supplied from the THB terminal when the resistance changes according to the battery temperature. The ECM determines the battery temperature according to fluctuations in voltage. When the battery temperature is high, the ECM determines to reduce the amount of current supplied from the generator in order to protect the battery.