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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Load Management Control Mode

When the HVAC controller has a request for rear window defog at idle, the HVAC controller sends a message via UART Serial Data to the PCM to increase the desired idle speed. The changes to desired idle speed are as follows. At idle in park/neutral desired idle speed will be at least 1040 RPM. When a gear other than park or neutral is selected, the desired idle speed will be at least 704 RPM.