Operation CHARM: Car repair manuals for everyone.
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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Auto A/C System Description

AUTO A/C System Description

The automatic air conditioning system (auto A/C), HVAC control module automatically controls inside air temperature, blower speed, airflow outlet and so forth.
Once users set up desired inside air temperature with the temperature control selector, select "AUTO" position of blower speed selector and push auto A/C switch, HVAC control module detects inside air temperature, outside air temperature, amount of sunlight, and engine coolant temperature by means of inside air temperature sensor, outside air temperature sensor, sunload
sensor, and engine coolant temperature (ECT) sensor respectively.
Then, HVAC control module keeps desired in-car temperature at any time.
Then, HVAC control module keeps in-car temperature at desired level and auto A/C indicator lamp of HVAC control module turns on.