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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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With Dual Automatic Temperature Control (Datc)

COOLANT CONTROL VALVE

The coolant control valve is actuated by the coolant control valve vacuum circuit. When the coolant control valve is closed (at full vacuum), coolant flow through the heater core is shut off and A/C cooling efficiency is increased.