Input Circuits - Hybrid Battery Temperature
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
The hybrid drive motor battery is an air cooled component. The hybrid drive motor battery vent fan and relay are located inside the hybrid drive motor battery assembly and controlled by the BECM. The BECM monitors four hybrid battery temperature sensors, one air inlet temperature sensor, and one air outlet temperature sensor. These six temperature sensors are internal to the hybrid drive motor generator battery assembly. The four hybrid battery temperature sensors are located on the top of the hybrid batteries. The resistances of these temperature sensors increase with temperature. The BECM can adjust the vent fan speed based on vehicle speed and temperature.