Mitsubishi 1992 3000GT, Service Manual

Page: 202 / 1308

MULTIPORT On-Vehicle Inspection of MFI
FUEL INJECTION Components
POSITION SENSOR
A Equipment side
connector
Throttle position sensor
A Harness side
connector
Engine control module ,
,
I -
7
61
Terminal voltage (V)
Minimum Maximum
Engine control module connector
Throttle shaft turning angle
162461
OPERATION
l
The throttle position sensor converts the throttle position opening into a voltage and inputs it to the
control module, which then controls the fuel injection based on the input signal.
l
The 5 V power in the engine control module is supplied to the throttle position sensor. Through
the resistor in the sensor, it is grounded in the engine control module.
l
As the throttle valve shaft rotates from the idle position to wide open position, the resistance between
the 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 fixed SAS setting, adjust the fixed
SAS.
TSB Revision