FUEL SYSTEM
VALVE>
Inspection of
Components
INSPECTION
Using Scan Tool
Item No.
Data display
Inspection conditions
12
Sensor de-
tection air
volume (fre-
quency)
. Engine coolant
temperature:
. Lights, cooling fan, elec-
trical accessories: OFF
. Transaxle: neutral
models: “P” range)
Racing
Frequency in-
creases as racing
increases.
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
0
Using Oscilloscope
Run the engine at idle speed.
( 2 ) C o n n e c t t h e p r o b e t o t h e
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
I
Repair the
Harness side
connector
Measure the terminal voltage.
. Connector: Disconnected
. Ignition switch: ON
OK
Repair the
h a r n e s s .
TSB Revision
Summary of Contents for 1989 Galant
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