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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Principles of Operation




Ford Work Solutions(TM)

Principles of Operation

Crew Chief

The telematics module uses the modem-antenna to exchange data with a remote computer. The telematics module monitors other vehicle modules on the High Speed Controller Area Network (HS-CAN) to gather vehicle data such as throttle position, idle time, and braking data. It does not communicate with a scan tool.