Mitsubishi Stealth 1994 Import Service Manual page 578

MULTIPORT FUEL INJECTION -
INSPECTION
Using Scan Tool
Function
Item No. Data display
Data reading 45
NOTE
When the vehicle is new [within initial operation of about 500 km (300 miles)], the stepper motor steps may be about 30
steps more than standard.
Caution
When the selector lever is shifted to the "D" range, the brakes must be used to prevent the vehicle from moving
forward.
I I I I I I
Check condition
Stepper
Engine coolant tem-
l
motor steps
perature: 80 to 95°C
to
205°F)
. Lights, electric cooling
fan, accessory units:
All OFF
Transaxle: Neutral
l
with A/T>
Steering wheel: Neutral
l
Idle position switch: ON
l
(compressor clutch
to be ON if air condi-
tioning switch is ON)
Using Oscilloscope
(1) Connect the probe to each oscilloscope pick-up point as
(2) Start the engine.
(3) When the air conditioning switch is turned on, the idling
On-Vehicle Inspection of MFI Components
Load state
l
Shift to D range
shown in the circuit diagram.
speed increases to operate the idle speed control. Check
the instantaneous waveform.
NOTE
Keep in mind that the waveform can be observed only
when idle speed control is in operation.
Standard value
2 - 25 step
Increase by 10 -
70 step
50 step