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
Information Bus: Description and Operation
CIRCUIT OPERATION: The
data line Is the communication link between the technician and the various modules on the vehicle. Besides allowing modules to communicate with each other, It allows the technician to run system diagnostics via the data link connector
DLC. Using a hand-held bi-directional scan tool, the technician can read and erase codes.