Nissan Rogue. Manual — part 737
HA-16
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
>> GO TO 2.
2.
SYMPTOM CHECK
Verify symptoms.
>> GO TO 3.
3.
CHECK FOR DTCS
With CONSULT
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” of “HVAC”.
3. Check DTC.
Is any DTC detected?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
PERFORM DTC DIAGNOSTIC PROCEDURE
Perform the diagnostic procedure for the detected DTC. Refer to
HAC-32, "DTC Inspection Priority Chart"
(automatic A/C) or
HAC-135, "DTC Inspection Priority Chart"
(manual A/C).
>> GO TO 7.
5.
OPERATION CHECK
Perform the operation check. Refer to
(manual A/C).
>> GO TO 6.
6.
SYMPTOM DIAGNOSIS
Check the symptom diagnosis table. Refer to
HAC-96, "Diagnosis Chart By Symptom"
(automatic A/C) or
(manual A/C).
>> GO TO 8.
7.
VERIFY REPAIR.
With CONSULT
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” of “HVAC”.
3. Check DTC.
Is any DTC detected?
YES
>> GO TO 4.
NO
>> GO TO 8.
8.
PERFORM FINAL OPERATION CHECK
Perform the operation check. Refer to
(manual A/C).
Does it operate normally?
YES
>> Inspection End.
NO
>> GO TO 2.
REFRIGERATION SYSTEM SYMPTOMS
HA-17
< SYMPTOM DIAGNOSIS >
C
D
E
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K
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A
B
HA
N
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SYMPTOM DIAGNOSIS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual Pressure
INFOID:0000000011279478
Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to
above table (Ambient air temperature-to-operating pressure table) since the standard (usual) pressure, how-
ever, differs from vehicle to vehicle.
Symptom Table
INFOID:0000000011279479
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
Both high- and low-pressure sides
are too high.
The pressure returns to nor-
mal is reduced soon after wa-
ter is splashed on condenser.
Excessive refrigerant charge in
refrigeration cycle.
Reduce refrigerant until speci-
fied pressure is obtained.
Air suction by cooling fan is in-
sufficient.
Insufficient condenser cooling
performance.
↓
1.
Condenser fins are
clogged.
2.
Improper fan rotation of
cooling fan.
• Clean condenser.
• Check and repair cooling fan
if necessary.
• Low-pressure pipe is not
cold.
• When compressor is
stopped high-pressure
reading quickly drops by
approximately 196 kPa
(1.96 bar, 2 kg/cm
2
, 28 psi).
It then decreases gradually
thereafter.
Poor heat exchange in con-
denser
(After compressor operation
stops, high-pressure decreas-
es too slowly).
↓
Air in refrigeration cycle.
Evacuate repeatedly and re-
charge system.
Engine tends to overheat.
Engine cooling systems mal-
function.
Check and repair each engine
cooling system.
• An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
• Low-pressure pipe is some-
times covered with frost.
• Excessive liquid refrigerant
on low-pressure side.
• Excessive refrigerant dis-
charge flow.
• Expansion valve is open a lit-
tle compared with the speci-
fication.
↓
Improper expansion valve ad-
justment.
Replace expansion valve.
High-pressure side is too high and
low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.
High-pressure tube or parts lo-
cated between compressor
and condenser are clogged or
crushed.
• Check and repair or replace
malfunctioning parts.
• Check lubricant for contami-
nation.
AC359A
AC360A
HA-18
< SYMPTOM DIAGNOSIS >
REFRIGERATION SYSTEM SYMPTOMS
High-pressure side is too low and
low-pressure side is too high.
High- and low-pressure sides
become equal soon after
compressor operation stops.
Compressor pressure opera-
tion is improper.
↓
Damaged inside compressor
packings.
Replace compressor.
No temperature difference be-
tween high- and low-pressure
sides.
Compressor pressure opera-
tion is improper.
↓
Damaged inside compressor
packings.
Replace compressor.
Both high- and low-pressure sides
are too low.
• There is a big temperature
difference between liquid
tank outlet and inlet. Outlet
temperature is extremely
low.
• Liquid tank inlet and expan-
sion valve are frosted.
Liquid tank inside is slightly
clogged.
• Replace liquid tank.
• Check lubricant for contami-
nation.
• Expansion valve inlet tem-
perature is extremely low
as compared with areas
near liquid tank.
• Expansion valve inlet is
frosted.
• Temperature difference oc-
curs somewhere in high-
pressure side.
High-pressure pipe located be-
tween liquid tank and expan-
sion valve is clogged.
• Check and repair malfunc-
tioning parts.
• Check lubricant for contami-
nation.
Expansion valve and liquid
tank are warm or slightly cool
when touched.
Low refrigerant charge.
↓
Leaking fittings or components.
Check refrigerant for leaks. Re-
fer to
.
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.
↓
1.
Improper expansion
valve adjustment.
2.
Malfunctioning expansion
valve.
3.
Outlet and inlet may be
clogged.
• Remove foreign particles by
using compressed air.
• Replace expansion valve.
• Check lubricant for contami-
nation.
An area of the low-pressure
pipe is colder than areas near
the evaporator outlet.
Low-pressure pipe is clogged
or crushed.
• Check and repair malfunc-
tioning parts.
• Check lubricant for contami-
nation.
Air flow volume is not enough
or is too low.
Evaporator is frozen.
• Check intake sensor circuit.
Refer to
.
• Replace compressor.
• Repair evaporator fins.
• Replace evaporator.
• Check blower motor circuit.
Refer to
.
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
AC356A
AC353A
REFRIGERATION SYSTEM SYMPTOMS
HA-19
< SYMPTOM DIAGNOSIS >
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Low-pressure side sometimes be-
comes negative.
• Air conditioning system
does not function and does
not cyclically cool the com-
partment air.
• The system constantly
functions for a period of
time after compressor is
stopped and restarted.
Refrigerant does not discharge
cyclically.
↓
Moisture is frozen at expansion
valve outlet and inlet.
↓
Water is mixed with refrigerant.
• Drain water from refrigerant
or replace refrigerant.
• Replace liquid tank.
Low-pressure side becomes nega-
tive.
Liquid tank or front/rear side
of expansion valve’s pipe is
frosted or wet with dew.
High-pressure side is closed
and refrigerant does not flow.
↓
Expansion valve or liquid tank
is frosted.
Leave the system at rest until
no frost is present. Start it again
to check whether or not the mal-
function is caused by water or
foreign particles.
• Cooling is initially okay if wa-
ter is the cause. Then the wa-
ter freezes causing a
blockage. Drain water from
refrigerant or replace refriger-
ant.
• Remove expansion valve and
remove the particles with dry
and compressed air (not shop
air) if due to foreign particles.
• Replace expansion valve if
either of the above methods
cannot correct the malfunc-
tion.
• Replace liquid tank.
• Check lubricant for contami-
nation.
Gauge indication
Refrigerant cycle
Probable cause
Corrective action
AC354A
AC362A
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