2004 NISSAN TERRANO air conditioning

Set the recovery/recycling/rechargingequipment.
Recovered lubrication oilRefer to LUBRICATION
OIL Ð Checking and
Adjusting. Discharge refrigerant into recovery/
recycling/recharging equipment.
Repair or replace parts.
Evacuate the unwanted air in charging hoses.
Evacuating (over 25 minutes).
Check air tightness.ERepair.
G
ECharging [approx. 200 g (7.05 oz)].
*-1
Preliminary refrigerant leak check.
Complete charging
[specified amount Ð 200 g (7.05 oz)].
*-1
Check for refrigerant leaks.
*-2
Check for A/C operation and A/C cooling performance
Remove service couplers from A/C service valves.
Recover refrigerant in charging hoses.
Note: *-1 Before charging refrigerant, ensure engine is off.*-2 Before checking for leaks, start engine to activate air conditioning system then turn it off.
Service valve caps must be attached to valves (to prevent leak).
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SERVICE PROCEDURES
HFC-134a (R-134a) Service Procedure (Cont'd)
HA-17
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Gauge indicationRefrigerant cycleProbable causeCorrective action
Both high- and low-pressure
sides are too low.
AC353A
There is a big temperature dif-
ference between expansion
valve inlet and outlet while the
valve itself is frosted. Expansion valve closes a little
compared with the specifica-
tion.
"
q
1Improper expansion valve
adjustment
q
2Malfunctioning expansion
valve
q
3Outlet and inlet may be
clogged. I
Remove foreign particles by
using compressed air.
I Check compressor oil for
contamination.
I Replace expansion valve.
Areas near low-pressure pipe
connection and service valve
are extremely cold as com-
pared with areas near expan-
sion valve outlet and evapora-
tor. Low-pressure pipe is clogged
or crushed.
I
Check and repair malfunc-
tioning parts.
I Check compressor oil for
contamination.
Air flow volume is not enough
or is too low. Evaporator is frozen.
"
Compressor discharge capac-
ity does not change. (Com-
pressor stroke is set at maxi-
mum length.) Replace compressor.
Low-pressure side sometimes
becomes negative.
AC354A
I Air conditioning system does
not function and does not
cyclically cool the compart-
ment air.
I The system constantly func-
tions for a certain period of
time after compressor is
stopped and restarted. Refrigerant does not discharge
cyclically.
"
Moisture is frozen at expan-
sion valve outlet and inlet. "
Water is mixed with refrigerant. I
Drain water from refrigerant
or replace refrigerant.
I Replace liquid tank.
DIAGNOSES Ð Overall System
Performance Test Diagnoses (Cont'd)
HA-35
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Main Power Supply and Ground Circuit Check
POWER SUPPLY CIRCUIT CHECK FOR A/C SYSTEM
Check power supply circuit for air conditioning system.
Refer to ªPOWER SUPPLY ROUTINGº in EL section and ªWir-
ing Diagramº.
TROUBLE DIAGNOSES
HA-52
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