Battery Temperature Sensor: Description and Operation

Fig. 1 Battery Temperature Sensor Location:

BATTERY TEMPERATURE SENSOR
The battery temperature sensor is used to determine the battery temperature and control battery charging rate. This temperature data, along with data from monitored line voltage, is used by the Powertrain Control Module (PCM) to vary the battery charging rate. System voltage will be higher at colder temperatures and is gradually reduced at warmer temperatures.

The sensor is located under the vehicle battery, and is attached to the battery tray.

CIRCUIT OPERATION
The Powertrain Control Module (PCM) determines battery temperature on circuit K118. Circuit K118 connects the PCM to the battery temperature sensor. Circuit K118 connects to cavity C15 of the PCM. Circuit K167 provides ground for the sensor and connects to PCM cavity A4.