Acura CSX. Manual - part 498
Test results
Related symptoms
Probable cause
Remedy
21-106
Climate Control
•
•
The discharge
pressure is low, the
suction pressure is
extremely low, and
the expansion valve
outlet is abnormally
warm
There is no frost on the
expansion valve outlet,
and the liquid line
temperature changes
significantly across the
expansion valve.
There is excessive
moisture in the A/C
system.
Recover refrigerant (see page 21-90),
then replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the suction line is
abnormally cold
There is frost on the line
from the evaporator to
the compressor.
The evaporator is
internally
contaminated or
plugged.
Recover refrigerant (see page 21-90),
then replace the evaporator. Evacuate
the system (see page 21-91), and
recharge the system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the refrigerant
temperature doesn’t
change going
through the
expansion valve
There is no frost on the
expansion valve, and
the low pressure liquid
line is not cold.
The liquid line
temperatures are
similar on both sides of
expansion valve.
The expansion valve
is faulty.
Replace the expansion valve (see page
21-80).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the expansion valve
is abnormally cold
There is frost on the
expansion valve.
Excessive moisture
in the system is
freezing the
expansion valve.
Recover refrigerant (see page 21-90),
the replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
The discharge
pressure is low, the
suction pressure is
extremely low, and
the high pressure
liquid line is
abnormally cold
There is frost on the line
from the receiver/dryer to
the expansion valve.
The receiver/dryer is
clogged.
Recover refrigerant (see page 21-90),
then replace the receiver/dryer
(see page 21-89). Evacuate the system
(see page 21-91), and recharge the
system (see page 21-92).
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