Mitsubishi 3000GT Service Manual page 253

INSPECTION
Tool
Using Scan
item No.
Data 41
reading (Rear bank)
47
(Front bank)
Item
No.
Function
Data
41
reading (Rear bank)
47
(Front bank)
NOTE
rpm.
'3: When the vehicle is new [within initial operation of
about 10% longer.
Function Item No.
01
02
03
04
05
06
Normal waveform
MULTIPORT On-Vehicle Inspection of MFI
Data display Check condition
Drive time" Engine: Cranking
Data display Check condition
Drive time*"
Engine coolant temper- 700 rpm (Idle)
l
ature: 80 to 95°C
to 203°F)
(176
fan, accessory units: All
OFF
Transaxle: Neutral
l
Steering wheel: Neutral
l
about
Drive content
No.1 injector shut off
injector shut off
No.2
No.3 injector shut off
No.4 injector shut off
No.5 injector shut off
injector shut off
No.6
Using Oscilloscope
(1) Run the engine at idle speed.
(2) Connect the probe to the oscilloscope pick-up point as
shown in the circuit diagram, and check the waveform
at the drive side of each injector.
Coolant temperature
0°C (32"F)**
20°C (68°F)
80°C (176°F)
Engine state
When stiarp racing is To increase
made
500 km (300 miles)], the injector drive time may be
Check condition
Engine: Idling after
warm-up
(Shut off the injectors in
sequence during idling
after engine warm-up,
check the idling condi-
tion)
Standard value
m s
26.1-31.9
m s
6.3-7.7
1.6-2.8 ms
1.4-2.6 ms
Normal state
Idle state to change fur-
ther (becoming less
stable or stalling)