Mitsubishi 1989-1993 GALANT Service Manual page 192

FUEL SYSTEM <SOHC-8 VALVE>
INSPECTION
Using Scan Tool
Item No.
12
NOTE
The volume air flow sensor output frequency may be about 10% higher than indicated above when the vehicle is new
[driven approximately 500 km (300 miles) or less].
Regular waveform
HARNESS INSPECTION
Harness side
connector
Harness side
connector
Inspection conditions
Data display
. Engine coolant
Sensor de-
temperature: 85-95°C
tection air
volume (fre-
. Lights, cooling fan, elec-
quency)
trical accessories: OFF
. Transaxle: neutral (iVT
models: "P" range)
Using Oscilloscope
( 2 ) C o n n e c t t h e p r o b e t o t h e osilloscope p i c k - u p p o i n t a s
shown in the circuit diagram, and check the wave form.
Measure the power supply voltage.
. Connector: Disconnected
. Ignition switch: ON
0
Measure the terminal voltage.
. Connector: Disconnected
. Ignition switch: ON
TSB Revision
Frequency in-
Racing
creases as racing
I
OK
h a r n e s s .
Repair the
Repair the