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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System Specifications

CONTROLLED IDLE SPEED

Transmission Gear Idle Speed IAC Counts [1] OPEN/CLOSED Loop [2]

Man. N 750 +/- 25 5-30 CL

Auto D 675 +/- 25 5-30 CL

[1] On manual transmission vehicles the TECH 1 will display RDL in Neutral. Add 2 counts for engines with less than 500 miles. Add 2 counts for every 1000 ft. above sea level.

[2] Let engine idle until proper fuel control status is reached (OPEN/CLOSED loop).


MINIMUM IDLE AIR RATE

Transmission Gear Engine Speed [1] OPEN/CLOSED Loop [2]

Man. N 625 +/- 25 CL

Auto. D 625 +/- 25 CL

[1] If the engine has less than 500 miles or is checked at altitudes above 1500 feet, the idle RPM with a seated IAC valve should be lower than above values.

[2] Let engine idle until proper fuel control status (OPEN/CLOSED loop) is reached.