Mitsubishi Stealth 1994 Import Service Manual page 523

MULTIPORT FUEL INJECTION -
INTAKE AIR TEMPERATURE SENSOR
Volume air flow sensor
(with built in intake air
- t e m p e r a t u r e sensor and
temperature sensor
OPERATION
The intake air temperature sensor converts the engine intake air temperature into a voltage and inputs it to
l
the engine control module, which then corrects the fuel injection rate, etc. based on the input signal.
The 5 V power in the engine control module is supplied via a resistor in the module to the intake air
l
temperature sensor. Via the sensor which is a kind of resistor, it is grounded in the engine control module.
The intake air temperature sensor resistor has the characteristic of decreasing its resistance decreases as
the intake air temperature rises.
The intake.air temperature sensor terminal voltage increases or decreases as the sensor resistance
l
increases or decreases. Therefore, the intake air temperature sensor terminal voltage changes with the
intake air temperature, decreasing as the temperature rises.
TROUBLESHOOTING HINTS
The intake air temperature sensor senses the intake air temperature in the air cleaner so that it may indicate a
temperature different from outside temperature depending on engine operating state.
On-Vehicle Inspection of MFI Components
Temperature
1 6 2 4 5 5
connector
Volume air flow
sensor connector
connector
Temperature
Intake air
temperature
sensor
" 6
5
Engine control
52 module
162100