Mitsubishi 3000GT Service Manual page 190

INSPECTION
Using Scan Tool
<Volume Air Flow Sensor>
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
Function Item No.
34
Data list
<Volumetric Efficiency>
I
Regular waveform
MULTIPORT
On-Vehicle Inspection of MFI
FUEL INJECTION - Components
Data display Check condition
Sensor air Engine coolant
l
volume temperature: 80
to 95°C (176 to
(frequency)
203" F)
Lights and acces-
l
sories: OFF
Transaxle: Neu-
l
tral (P range for
vehicle with A/T)
Steering wheel:
l
Neutral
Data display Check conditions
Reset signal 0 Engine warm up
condition
ry operation: OFF
Transaxle: Neutral
l
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.
I
TSB Revision
Engine state
22-48 Hz
700 rpm (Idle)
2,000 rpm
Racing Frequency
with racing
Engine conditions
700 rpm (Idle)
2,000 rpm
Standard value
I
increases
Standard value
ON
OFF
creases with rac-