Mitsubishi 3000GT Service Manual page 212

INSPECTION
Using Scan Tool
NOTE
(1) The tachometer indicates a third of the actual engine speed. Therefore, 3 times the tachometer indication
is the actual engine speed.
(2) When the tachometer is set to the 2-cylinder range, it indicates actual engine speed.
Item
Function
No.
Data reading 22
Normal waveform
On-Vehicle Inspection of MFI
FUEL INJECTION - Components
current of ignition
Data display Check condition
Idle speed
Closed throttle posi- At 0°C (32°F)
l
tion switch: ON
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.
TSB Revision
Check content
Coolant temperature
At 20°C (68°F)
At 40°C (104°F)
At 80°C (176°F) 600-800 rpm
Standard value