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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Brake Signal: Description and Operation

The Brake On Off (BOO) signal is received by the Electronic Control Assembly (ECA) when the brakes are APPLIED. The ECA uses this signal to modify the operation of the torque converter clutch (if equipped), A/C compressor (if equipped), and idle speed during periods of decel and idle with the brakes APPLIED.