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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Idle Speed Control



Idle Speed Control

Description

If all the entry conditions are satisfied, then the monitor will start execution.

If the actual engine speed more than 100 rpm lower than the target engine speed then a counter is started and once this exceeds the failure time limit a failure judgement is made for idle speed lower than expected.

If the actual engine speed is greater than 200 rpm higher than the target engine speed then a counter is started and once this exceeds the failure time limit a failure judgement is made for idle speed higher than expected.