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)

Or, hide this message: temporarily or permanently

Malfunction Indicator Lamp: Service and Repair

CHECK ENGINE LIGHT RESET OPERATION

Disconnect ECU or battery to clear all codes.

NOTE: All idle control adaptations are lost when the battery or ECU is disconnected. The vehicle will need to be driven a minimum of 6 minutes and let idle at least 10 minutes, so the control unit can relearn idle speed, timing and mixture parameters. The engine must be at operating temperature, throttle switch for idle position closed or adaptation will not take place.