Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
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Solar Sensor: Description and Operation
The sunload sensor provides the HVAC control processor 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 processor to the sunload sensor over the driver
solar sensor signal circuit. A variable photo-diode resistor inside the sensor varies the voltage. That varied voltage provides a signal to the software inside the HVAC control processor. Remaining voltage from the sunload sensor is sent back to the HVAC control processor ground through the low reference circuit.