1999 NISSAN PRIMERA Electronic Repair Manual

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Page 1881 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual PRELIMINARY CHECK 3
Noise
Check where noise comes from.
Blower motorCompressorExpansion valveRefrigerant lineBelt
Check for noise in
all modes and tem-
perature settings.
Noise is
constant.Inspect the

Page 1882 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Performance Test Diagnoses
INSUFFICIENT COOLING
INSUFFICIENT COOLING
CHECK AIR FLOW.
OK
ENG
CHECK BLOWER MOTOR OPERA-
TION.
OK NG
CHECK COMPRESSOR OPERATION.
OK NGClogged blower inlet/
Clogged duct/Lo

Page 1883 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual pA
Malfunctioning blower motor fanMalfunctioning electrical circuitMalfunctioning blower motor inter-
nal circuit
Loose fan/Improper contact of fan
and case/Deformed fanDiscontinued wiring or componen

Page 1884 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual A/C Performance Chart
TEST CONDITION
Testing must be performed as follows:
Vehicle location: Indoors or in shade (in a well ventilated
place)
Doors: Closed
Door window: Open
Temp lever position: Max C

Page 1885 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Trouble Diagnoses for Abnormal Pressure
Whenever the systems high and/or low side pressure is abnormal, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indic

Trouble Diagnoses for Abnormal Pressure
Whenever the system's high and/or low side pressure is abnormal, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indicates the standard (normal) pressure range. Since
the standard (normal) pressure, differs from vehicle to vehicle, refer to HA-35 (ªAmbient air temperature-to-
operating pressure tableº).
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high and low-pressure
sides are too high.
AC359A
lPressure is reduced soon
after water is splashed on
condenser.Excessive refrigerant charge
in refrigeration cycle.Reduce refrigerant until
specified pressure is
obtained.
Air suction by cooling fan is
insufficient.Insufficient condenser cooling
performance
"
p1Condenser fins are
clogged.
p2Improper cooling fan
rotation.
lClean condenser.
lCheck and repair cooling
fan as necessary.
lLow-pressure pipe is not
cold.
lWhen compressor is
stopped high-pressure
value quickly drops by
approximately 196 kPa (2.0
bar, 2 kg/cm
2, 28 psi). It
then decreases gradually
thereafter.Poor heat exchange in con-
denser
(After compressor operation
stops, high pressure
decreases too slowly.)
"
Air in refrigeration cycle.Evacuate repeatedly and
recharge system.
Engine tends to overheat. Engine cooling systems mal-
function.Check and repair each
engine cooling system.
lAn area of the low-pres-
sure pipe is colder than
areas near the evaporator
outlet.
lPlates are sometimes cov-
ered with frost.
lExcessive liquid refrigerant
on low-pressure side
lExcessive refrigerant dis-
charge flow
lExpansion valve is open a
little compared with the
specification.
"
p1Improper thermal valve
installation.
p2Improper expansion
valve adjustment.Replace expansion valve.
High-pressure side is too high
and low-pressure side is too
low.
AC360A
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts
located between compressor
and condenser are clogged
or crushed.lCheck and repair or
replace malfunctioning
parts.
lCheck lubricant for con-
tamination.
TROUBLE DIAGNOSESAUTO
HA-36

Page 1886 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low
and low-pressure side is too
high.
AC356A
High and low-pressure sides
become equal soon after
compress

Page 1887 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Gauge indication Refrigerant cycle Probable cause Corrective action
Low-pressure side sometimes
becomes negative.
AC354A
lAir conditioning system
does not function and does
not cyclically cool the com

Page 1888 of 2267

NISSAN PRIMERA 1999 Electronic Repair Manual Component Location
NHA290
In-vehicle sensorA/C control
panel
Sunload sensorA/C relay
.Triple-pressure switch
(With dieselengine)
Dual-pressure switch (With GA engine)
Pressure sensor (SRand QG engine)

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