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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A/C Signal: Description and Operation

OPERATION
The air conditioning switch applies the battery voltage to the engine control module when the air conditioning is turned on.

When the air conditioning ON signal is input, the engine control module drives the idle air control motor and turns ON the power transistor. As a result, the air conditioning compressor clutch relay coil is energized to turn ON the relay switch, which activates the air compressor magnet clutch.