Mitsubishi Stealth 1994 Import Service Manual page 635

MULTIPORT FUEL INJECTION -
INSPECTION
Using Scan Tool
Item No. Data display
Function
Data reading 22
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.
tern No. Data display
Function
22
Data reading
5v
Normal waveform
Check condition
Cranking
speed
(check on and off of
primary current of
ignition coil by
tachometer)
Check condition
Idle speed
idle
position switch: ON
Using Oscilloscope
(2) Connect the probe to the oscilloscope pick-up point as
On-Vehicle Inspection of MFI Components
Check content
Compare cranking speed
Coolant temperature
At -20°C (-4°F)
At 0°C (32°F)
At 20°C (68°F)
At 40°C (104°F)
At 80°C (176°F)
shown in the circuit diagram, and check the waveform.
Normal state
Indicated speed
to agree
Standard value
1,275 - 1,475 rpm
1,225 - 1,425 rpm
1,100 - 1,300 rpm
950 - I,1 50 rpm
600 - 800 rpm