2005 INFINITI QX4 Factory Service Manual

towing capacity wiring diagram maintenance schedule clock reset refuelling towing

Page 521 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-126
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
High-pressure Side is Too Low and Low-pressure Side is Too High
Both High- and Low-pressure Sides are Too Low
Gauge indication Refrigerant cyc

ATC-126
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
High-pressure Side is Too Low and Low-pressure Side is Too High
Both High- and Low-pressure Sides are Too Low
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too low and
low-pressure side is too high.High- and low-pressure sides
become equal soon after com-
pressor operation stops.Compressor pressure opera-
tion is improper.
↓
Damaged inside compressor
packings.Replace compressor.
No temperature difference
between high- and low-pres-
sure sides.Compressor pressure opera-
tion is improper.
↓
Damaged inside compressor
packings.Replace compressor.
AC356A
Gauge indication Refrigerant cycle Probable cause Corrective action
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.
Temperature of expansion
valve inlet is extremely low
as compared with areas
near liquid tank.
Expansion valve inlet may
be frosted.
Temperature difference
occurs somewhere in high-
pressure side.High-pressure pipe located
between liquit 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 only cool
when touched.Low refrigerant charge.
↓
Leaking fittings or compo-
nents.Check refrigerant system for
leaks. Refer to ATC-189,
"Checking for Refrigerant
Leaks" .
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.
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 too low. Evaporator is frozen.
Check intake sensor circuit.
Refer to ATC-145, "
Intake
Sensor Circuit" .
Repair evaporator fins.
Replace evaporator.
Refer to AT C - 9 3 , "Front
Blower Motor Circuit" .
AC353A

Page 522 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
ATC-127
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
Low-pressure Side Sometimes Becomes Negative
Low-pressure Side Becomes Negative
Gauge indication Refrigerant cycle

Page 523 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-128
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Insufficient HeatingEJS003XX
SYMPTOM: Insufficient heating
INSPECTION FLOW
*1ATC-57, "Operational Check (Front)"
or ATC-60, "
Operational Che

Page 524 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
ATC-129
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
NoiseEJS003XY
SYMPTOM: Noise

Page 525 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-130
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
INSPECTION FLOW
WJIA0473E

Page 526 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
ATC-131
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
*1ATC-179, "REMOVAL"*2ATC-180, "INSTALLATION"*3AT C - 2 2 , "Maintenance of Lubricant
Quantity in Compressor"
*4

Page 527 of 3419

INFINITI QX4 2005 Factory Service Manual ATC-132
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
Self-diagnosisEJS003XZ
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
*1AT C - 6 1 , "Power Supply and Ground
Circuit for Fron

Page 528 of 3419

INFINITI QX4 2005 Factory Service Manual TROUBLE DIAGNOSIS
ATC-133
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
Memory FunctionEJS003Y0
SYMPTOM: Memory function does not operate.
INSPECTION FLOW
Water Valve CircuitEJS003Y1
COM

Load next 8 pages

Page: < prev 1-10 ... 489-496 497-504 505-512 513-520 521-528 529-536 537-544 545-552 553-560 ... 3424 next >

navigation check engine brake pads dashboard parking sensors length