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

LAN System: Bus Check

LAN System: Bus Check

SDT and bus check (on-board diagnosis function) are used for detecting root cause.

MONITOR ITEM (SDT)

Example: Bus check indication






MONITOR ITEM (ON-BOARD DIAGNOSIS)

NOTE: For some models, CAN communication diagnosis result is received from the vehicle monitor. (SDT is not available.)

Example: Vehicle Display