DeVille DTS V8-4.6L VIN 9 (2002)
Solar Sensor: Description and Operation
SUNLOAD SENSOR
The sunload sensor assembly houses both the driver and passenger side sensors. The sunload sensor assembly provides the HVAC control module (IPM)
software with the amount of sun light entering the driver and passenger side through the windshield. A 5-volt reference signal is sent from the HVAC
control module to the sunload sensor over the driver and passenger solar sensor signal circuit. A variable photo-diode resistor inside the sensor varies the
voltage. That varied voltage provides a separate driver and passenger signal to the software inside the IPM. The sensor also provides an average reading
on the ambient light sensor signal circuit to the HVAC control module for the twilight sentinel feature. The low reference circuit provides ground to the
sensor.
