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

Engine Control Module: Tools and Equipment








Engine Signal Monitor
- Engine Signal Monitor (49 9200 162)
- Harness Adapter (49 FO18 902)
- Sheet Overlay-76 Pin Type (49 F018 903)

The Engine Signal Monitor (49 9200 162) was developed to check the powertrain control module engine (PCME) terminal voltages.