Mitsubishi 3000GT 1991 Service Manual page 217

FUEL SYSTEM
INSPECTION
Using Multi-use Tester
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.
Check condition
Stepper Engine coolant tem-
l
motor steps perature: 80 to 95°C
(176 to 205°F)
fan, accessory units:
All OFF
Transaxle: Neutral
l
with AA>
Steering wheel: Neutral
l
Idle position switch: ON
l
(compressor clutch
to be ON if air condi-
tioner 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 conditioner switch is turned on, the idling
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.
Load state
2 - 12 stp
25 - 65 stp
&conditioner switch:
15 - 63 stp
l
Shift to D range
Standard value