Mitsubishi Stealth 1994 Import Service Manual page 581

MULTIPORT FUEL INJECTION -
On-Vehicle Inspection of MFI Components
(5) With the idle air control motor as shown in the illustration,
connect the negative 0 terminal of the power supply to
each clip as described in the following steps, and check
whether or not a vibrating feeling (a feeling of very slight
vibration of the stepper motor) is generated as a result of
the activation of the stepper motor.
the red and black clip.
the blue and black clip.
the blue and yellow clip.
the red and yellow clip.
the red and black clip.
(6) If, as a result of these tests, vibration is detected, the
stepper motor can be considered to be normal.