Knock Sensor; Brake Switch; Battery Voltage - Mitsubishi Eclipse Technical Information Manual

KNOCK SENSOR

The knock sensor threads into the side of the cylinder
sensor detects a knock in one of the cylinders, it
sends an input signal to the PCM. In response,
the PCM retards ignition timing for all cylinders by
a scheduled amount.

BRAKE SWITCH

When the brake switch is activated, the power-train
control module (PCM) receives an input indicating
that the brakes are being applied. After receiving
this input the PCM maintains idle speed to scheduled

BATTERY VOLTAGE

The power-train control module (PCM) monitors the
battery voltage input to determine fuel injector pulse
width and generator field control. If battery voltage
ENGINE <NON-TURBO> - Control System
Knock sensors contain a piezoelectric material
which constantly detects engine knock vibration and
sends an input voltage (signal) to the PCM while
the engine operates. As the intensity of the engine
knock increases, the knock sensor output voltage
also increases.
Knock
RPM through control of the idle air control motor.
The brake switch is mounted on the brake pedal
support bracket.
is low the PCM will increase injector pulse width
(period of time that the injector is energized).