Barometric Pressure Sensor (Dohc) - Mitsubishi 1989-1993 GALANT Service Manual

FUEL SYSTEM <DOHC>
BAROMETRIC PRESSURE SENSOR
pressure
sensor
Output Voltage
4
1
0 Lz
Barometric pressure mmHg 760
OPERATION
The barometric-pressure sensor functions to
l
convert the barometric pressure to voltage, and
to input that voltage (as signals) to the engine
control module.
The engine control module, based upon those
signals, then corrects the amount of fuel injec-
tion, etc.
TROUBLESHOOTING HINTS
Hini 1:
sensor, driveability of the vehicle will become worse
particularly at high altitude.
<Non-Turbo>
sensor connector
I
@Harness side
connector
control
module
Engine control module connector
l
l
Hint 2:
If. during high-speed driving, there is a noticeable
sharp drop of the displayed pressure of the
barometric-pressure sensor, check for clogging of
the air cleaner.
TSB Revision
<Turbo>
air flow
sensor connector
Barometric pressure sensor
I
The 5V power supply within the engine control
module is supplied to the barometric-pressure
sensor; it passes through the circuitry within the
sensor, and is grounded at the engine control
module.
The barometric-pressure sensor output voltage
is sent to the engine control module in propor-
tion to the barometric pressure (absolute pres-
sure).
I