Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Input Circuits - Hybrid Battery Temperature
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.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.