Automatic Transaxle - Mitsubishi 3000GT 1991 Service Manual

FUEL SYSTEM
THROTTLE POSITION SENSOR
Throttle shaft turning angle
OPERATION
The throttle position sensor converts the throttle position opening into a voltage and inputs it to the engine
l
control unit, which then controls the fuel injection based on the input signal.
The 5 V power in the engine control unit is supplied to the throttle position sensor. Through the resistor in
l
the sensor, it is grounded in the engine control unit.
As the throttle valve shaft rotates from the idle position to Wide open position, the resistance between the
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variable resistor terminal of the throttle position sensor and the ground terminal increases. As a result, the
voltage at the throttle position sensor variable resistance terminal also increases.
TROUBLESHOOTING HINTS
Hint 1: The throttle position sensor signal is more important in the control of automatic transaxle than in the
engine control. Shifting shock and other troubles will be caused if this sensor is faulty.
Hint 2: If the output voltage of the throttle position sensor is out of specification, adjust the sensor and
check the voltage again. If there is an evidence of disturbed idle position switch (fixed SAS) setting,
adjust the idle position switch (fixed SAS).
Equipment side
Throttle positron sensor
connector
I
connector
Engine control unit ,
Engine control unit connector
13-65