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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Signal Description, Brake Control Module (BCM)






Signal specification
All the values given below are between the relevant terminal stated in column 1 and terminal #A16 or #A47 (ground) unless otherwise stated in parenthesis after the table entry.

Note! It is important that the breakout box is connected and that the ground terminals have been checked before readings are taken.