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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Emission Control Systems: Service and Repair

Engine Control Module (ECM) And Diagnostic Light Emitting Diode (LED) Locations:





ERASING DIAGNOSTIC TROUBLE CODES (DTC)'s
- Turn the ignition key on.
- Turn the diagnostic mode selector on the Engine Control Module (ECM) fully clockwise and wait more than two seconds then turn the selector fully counterclockwise. The Electronic Concentrated Engine Control System (ECCS) is now in mode 2.
- Turn the diagnostic mode selector on the ECM fully clockwise and wait more than two seconds then turn the selector fully counterclockwise. The ECCS system is now in mode 1 and the ECM memory is now erased.