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.