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
Brake Signal: Description and Operation
LOCATION Sensor mounted on brake pedal support bracket.
PURPOSE Powertrain Control Module (PCM) uses switch input to control
idle speed and speed control.
OPERATION PCM vents speed control system vacuum and turns speed control system OFF when appraised of a brake switch actuation.
PCM prevents engine stall during rapid decel, by actuating
Idle Air Control (IAC) motor.