Mitsubishi 3000GT Service Manual page 258

INSPECTION
Using Scan Tool
Item No.
Function
Data 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.
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MULTIPORT On-Vehicle Inspection of MFI
FUEL INJECTION - Components
Data display Check condition
Stepper mo- Engine coolant temper-
l
tor steps ature: 80 to 95°C
(176 to 203°F)
Lights, electric cooling
l
fan, accessory units:
All OFF
Transaxle: Neutral
l
(P range for vehicle
with AlT>
Steering wheel: Neutral
l
Idle position switch: ON
l
(compressor clutch to
be ON if airconditioning
switch is ON)
Engine: Idling
l
Using Oscilloscope
(1) Connect the probe to each oscilloscope pick-up point
as shown in the circuit diagram.
(2) Start the engine.
(3) When the air conditioning switch is turned on, the idling
speed increases to operate the idle speed control. Check
the instantaneous waveform.
NOTE
Keep
when idle speed control is in operation.
TSB Revision
Load state
Air conditioning switch:
OFF
Air conditioning switch:
ON
in mind that the waveform can be observed only
Standard value
Increase by
1 O-70 step