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
Typical Brake Pedal Position Switch:
PURPOSE The Brake On-Off
(BOO) switch detects braking action (deceleration). In response to the BOO signal, the ECA modifies idle speed, air/fuel ratio, torque converter clutch operation on A/T applications, and A/C compressor (if equipped).
OPERATION Switch contacts are closed when the brakes are APPLIED.