Flowchart A-5. 05 Or 20 Fault Code - Wayne Vista Series Service

05 or 20
fault code.
Pulse jitter error.
Check pulser disc for
cracks or blocked
openings.
Repair/replace
as necessary.
Is there dust on
the photocoupler?
NO
Is there tension
on the pulser disc?
YES
Check all connections
from the photocoupler
to the computer and
the solenoid drive
board.
Is the wiring OK?
NO
Repair/replace
the wiring.
Is the problem
corrected?
NO
2
November 1992
YES
Shim pulser
NO
3
pulser shaft and
YES the meter drive
gear aligned?
Align pulser shaft
and meter drive
YES
Replace photocoupler.
Is the problem
YES
NO
3
corrected?
END

FLOWCHART A-5. 05 OR 20 FAULT CODE

Clean dust from
photocoupler.
If problem
reoccurs replace
photocoupler.
shaft.
Are the
NO
gear.
YES
2
Replace the solenoid
drive board.
Is the problem
YES
corrected?
NO
Replace the
computer.
Part No. 917543 Rev. A
77