Subaru XT 1988 Service Manual page 807

4-1
82)
Test resu Its
as per Charts A2
and A5 revealed air
lea kage or clogged
line.
No
Turn ignition switch ON.
Check if
compressor stops
when 2·pole connector
of pressure switch is
disconnected.
Yes
Connect air pressu re gauge.
(See A2.)
Connect air charge solenoid
valve
ill
and compressor ~
to GND. Increase air pressure
to 10 atm. Then disconnect
solenoid valve and compressor
from GND.
Connect air discharge solenoid
valve
lID
to GND. Reduce air
pressure until pressure does not
change. Then disconnect
solenoid valve from GND.
Check if
air pressure
No
increases to at least
.-----...0(
9 atm. when air charge
solenoid valve
[l]
Faulty air charge
solenoid valve or
wiring (AB or A 13),
or clogged air pipe
between air charge
solenoid valve
and drier.
is connected
to GND.
Yes
Faulty pressure switch or
wiring (A 13) shorted.
SUSPENSION
Yes
No
Repair faulty parts.
Turn ignition switch OFF,
remove No. 18,19 (1800 cc
Canada model only) fuse and
turn ignition switch ON.
Check if
compressor
stops.
Yes
Check if
there is continuity
between terminal (A)
and GND.
No
Check if
there is continuity
between terminal (B)
and GND.
No
Replace control unit.
50
No
Yes
Yes
Seized compressor relay contacts
or shorted compressor ci rcu it
8.
Wiring between compressor relay
and control unit shorted.
A
Connector of compressor
relay (Female side)
Fig. 74
L4-1300
Wiring between pressure switch
and control unit shorted.
Connector of pressure
switch (Female side)
Fig.
75
L4-1373