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 (ISC) System

1. Warm up the engine and let it idle.

2. Verify that the fast idle cam separates.
3. Turn all electrical loads OFF.

4. Connect a tachometer to the data link connector terminal IG-.
5. With the coolant fan off, verify that the idle speed is within specification.

Idle speed (Neutral or P range): 700-750 (720 +30-20) rpm

6. Verify that the idle speed is within specification under the conditions shown.
7. If not as specified, inspect the input signal.