Subaru XT 1988 Service Manual page 1077

AIR CONDITIONING SYSTEM
4-7
Set A/C switch, Blower switch, High/Low
pressure switch to ON positions.
I
Does magnet clutch turn ON?
I
I
No
I
Yes
Turn A/C switch OFF and then ON to check if
l
Normal
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magnet clutch turns ON.
J
No
I
Yes
Is 12-volt power is applied to positive side (+)
of A/C relay exciting coil?
I
Normal
I
I
No
J
Yes
I
Check wiring.
Measure resistance between pulser's plot termi-
nals to see if it is in the 600 to
aoon
range.
I
Yes
I
No
Check gap between pawl (protrusion) of clutch
Replace pulser plot.
and pulser plot (on clutch side) to see if it is
below 4 mm (0.16 in).
I
No
I
Yes
Adjust gap to 2 to 4 mm
(o.oa
to 0.16 in).
Check to see if 12-volt power is appl ied to
power terminal (+) of amplifier (through wiring
from High/Low pressure switch).
I
Yes
I
No
I
Faulty amplifier
Faulty wiring or switches
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