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

CAN Communication System





NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

The network gateway ECU (sub bus monitor ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Network Gateway ECU Output DTCs (Techstream Display/Gateway)