Mitsubishi Stealth 1994 Import Service Manual page 620

MULTIPORT FUEL INJECTION -
INSPECTION
Using Scan Tool
<Volume Air Flow Sensor>
Function
Item No.
Data reading
12
NOTE
When the vehicle is new [within initial operation of about 500 km (300 miles)], the volume air flow sensor output
frequency may be about 10% higher.
<Volume Air Flow Sensor Reset Signal>
Function
Item No. Data display
Data list
34
<Volumetric Efficiency>
37
Regular waveform
Data display Check condition
Sensor air Engine coolant tem-
l
perature: 80 to 95°C'
[frequency) (176 to 205°F)
Lights and accessories:
l
OFF
Transaxle: Neutral
l
(P range for vehicle
with A/T)
Steering wheel: Neutral
l
Check conditions
Reset signal Engine warm up
l
condition
Check condition
Volumetric Engine coolant tem-
l
efficiency
perature: 80 to 95°C
(176 to 205°F)
Lights, electric cooling
l
fan and accessory opera-
tion: OFF
Transaxle: Neutral
l
(P range for vehicle
with A/T)
Steering wheel: Neutral
l
Using Oscilloscope
(2) Connect the probe to the oscilloscope pick-up point as
On-Vehicle Inspection of MFI Components
Engine state
700 rpm (Idle)
2,000 rpm
Racing
Engine conditions
700 rpm (Idle)
2,000 rpm
Engine state
700 rpm (Idle)
2,000 rpm
Racing
shown in the circuit diagram, and check the waveform.
Standard value
H z
22-48
50 - 90 <Non turbo>
68 - 108 <Turbo>
Frequency increases
with racing
Standard value
ON
OFF
Standard value
1 5 - 3 5 %
1 5 - 3 5 %
Frequency increases
with racing