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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Tune-up and Engine Performance Checks: Testing and Inspection

Engine Tune-up Preparation
1. Verify the following:
^ AT: Selector lever is in P or N position.
^ MT: Shift lever is in neutral position.
2. Turn off all electrical loads (A/C).
3. Warm up the engine.
(1) Increase the engine speed to 2,500-3,000 rpm until cooling fans start running.
(2) When the cooling fans start running, release the accelerator pedal and wait until the cooling fans stop running.





4. Connect the M-MDS to the DLC-2.
5. Verify that the idling speed (M-MDS: RPM PID) is within the specification using the M-MDS function.

Standard (no load)
AT: 760-860 rpm
MT: 750-850 rpm