Circuit/System Description

The Hybrid Powertrain Control Module 2 monitors the ambient air temperature sensor with a low reference circuit and 5 V signal circuit. The Hybrid Powertrain Control Module 2 monitors the voltage drop across the sensor, which is proportional to temperature. When the ambient air temperatures are cold, the resistance of the sensor is high and the voltage signals are high. When the ambient air temperatures are hot, the resistance of the sensors is low and the voltage signals are low. The Hybrid Powertrain Control Module 2 sends the ambient air temperature signal to the Instrument Cluster via serial data. The Instrument Cluster displays the temperature on the driver information center.