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HA-8
< PRECAUTION >
PRECAUTIONS
Do not attempt to connect HFC-134a (R-134a) service couplers to
the CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers
do not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied oils have been used with the scale. The hose fitting must be 1/
2 ″-16 ACME if the scale controls refrigerant flow electronically.
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder’s top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Shut-off valve rotati on A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D
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PREPARATIONHA-9
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000012431989
The actual shape of the tools may di ffer from those illustrated here.
Commercial Service ToolINFOID:0000000012431990
(TechMate No.)
Tool name Description
(J-41425-NIS)
AL Tubing Repair Kit Repairing leaks in A/C tubes
(J-38873-A)
Drive plate installer Installing pulley
(J-46534)
Trim Tool Set Removing trim components
ALIIA0390ZZ
WJIA0367E
AWJIA0483ZZ
(TechMate No.)
Tool nameDescription
(J-41810-NI)
Refrigerant identifier equipment (R-
134a) For checking refrigerant purity and
system contamination
(—)
Power tool Loosening nuts, screws and bolts
RJIA0197E
PIIB1407E
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HA-10
< PREPARATION >
PREPARATION
(J-48710)
NISSAN ACR2009 RRR UnitRefrigerant recovery
, recycling and re-
charging
(J-41995)
Electronic refrigerant leak detector Power supply:
• DC 12V (battery terminal)
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
Fluorescent leak detection dye
(box of 24, 1/4 ounce bottles)
(J-43872)
Refrigerant dye cleaner Power supply:
• DC 12V (battery terminal)
(J-39183-C)
Manifold gauge set (with hoses and
couplers) Identification:
• The gauge face indicates R-134a.
Fitting size-Thread size
• 1/2”-16 ACME
Service hoses:
• High side hose (J-39500-72B)
• Low side hose (J-39500-72R)
• Utility hose (J-39500-72Y) Hose color:
• Low side hose: Blue with black stripe
• High side hose: Red with black
stripe
• Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
• 1/2”-16 ACME
(TechMate No.)
Tool name
Description
WJIA0293E
AHA281A
ZHA200H
RJIA0196E
S-NT201
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PREPARATIONHA-11
< PREPARATION >
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Sealant and/or OilINFOID:0000000012431991
Service couplers
• High side coupler (J-39500-20A)
• Low side coupler
(J-39500-24A) Hose fitting to service hose:
• M14 x 1.5 fitting is optional or per-
manently attached.
(J-39699)
Refrigerant weight scale For measuring of refrigerant
Fitting size-Thread size
• 1/2”-16 ACME
(J-39649)
Vacuum pump
(Including the isolator valve) Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz)
Fitting size-Thread size
• 1/2”-16 ACME
(TechMate No.)
Tool name
Description
S-NT202
S-NT200
S-NT203
Tool name
Description
HFC-134a (R-134a) Refrigerant Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size
• large container 1/2”-16 ACME
NISSAN A/C System Oil Type DH-
PR Type: Poly alkylene glycol (PAG), type
DH-PR
Application: HFC-134a (R-134a) Vane-
rotary compressors
Capacity: 110 - 130 m (3.7 - 4.4 US fl
oz, 3.9 - 4.6 Imp fl oz)
S-NT196
JMIIA1759ZZ
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HA-12
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000012431992
AWIIA1694ZZ
ComponentFunction
1. Compressor Intakes, compresses, discharges and circulates refrigerant.
2. Condenser Cools the high-temperature high-pressure refrigerant discharged from the compressor to
change it into a liquid.
3. Liquid tank Filters and stores a reserve of liquid refrigerant.
4. Pressure sensor Senses refrigerant pressure for proper A/C cycle operation.
5. Evaporator Evaporates refrigerant which removes heat from the air lowering its temperature.
6. Expansion valve Transforms high-pressure liquid refrigerant to low-pressure liquid refrigerant.
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DIAGNOSIS AND REPAIR WORKFLOWHA-13
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
WorkflowINFOID:0000000012431993
OVERALL SEQUENCE
DETAILED FLOW
1.INTERVIEW CUSTOMER
Interview the customer to obtain as much informa tion as possible about the conditions and environment under
which the malfunction occurred.
ALIIA0440GB
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HA-14
< 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 “BCM”.
3. Check DTC.
Is any DTC detected?
YES >> GO TO 4.
NO >> GO TO 5.
4.PERFORM DTC DIAGNOSTIC PROCEDURE
Perform the diagnostic procedure fo r the detected DTC. Refer to BCS-49, "
DTCInspectionPriorityChart"
(with Intelligent Key system) or BCS-115, "DTCInspectionPriorityChart" (without Intelligent Key system).
>> GO TO 7.
5.OPERATION CHECK
Perform the operation check. Refer to HAC-30, "
Work Procedure".
>> GO TO 6.
6.SYMPTOM DIAGNOSIS
Check the symptom diagnosis table. Refer to HA-15, "
Symptom Table".
>> GO TO 8.
7.VERIFY REPAIR.
With CONSULT
1. Turn ignition switch ON.
2. Select “Self Diagnostic Result” of “BCM”.
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 HAC-30, "
Work Procedure".
Does it operate normally?
YES >> Inspection End.
NO >> GO TO 2.
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REFRIGERATION SYSTEM SYMPTOMSHA-15
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
REFRIGERATION SYSTEM SYMPTOMS
Trouble Diagnosis For Unusual PressureINFOID:0000000012431994
Diagnose using a manifold gauge set whenever refrigerant pressures are unusual. The marker above the
gauge scale in the following table indicates the standard (usual) pressure range. Refer to HA-24, "
Inspection".
Symptom TableINFOID:0000000012431995
Gauge indicationRefrigerant cycleProbable causeCorrective action
Both high and low-pressure sides
are too high. The pressure returns to nor-
mal soon after sprinkling wa-
ter on condenser.
Overfilled refrigerant. Recover refrigerant, evacuate
system, and recharge with the
specified amount of refrigerant.
Refer to HA-20, "
Recycle Re-
frigerant".
Air flow to condenser is insuf-
ficient. Insufficient condenser cooling
performance.
• Poor cooling fan rotation.
• Missing and/or improper in-
stallation of air guides.
• Clogged or dirty condenser fins. • Repair or replace malfunc-
tioning parts.
• Clean and/or repair condens- er fins.
When compressor stops,
high-pressure gauge quickly
drops by approximately 196
kPa (2 kg/cm
2, 28 psi), then
gradually decreases. Air mixed with refrigerant.
Recover refrigerant, evacuate
system, and recharge with the
specified amount of refrigerant.
Refer to HA-20, "Recycle Re-
frigerant".
• Low-pressure pipe is cooler than the outlet of evapora-
tor.
• Low-pressure pipe is frost- ed. Expansion valve opened too
much (excessive flow of refrig-
erant).
Replace expansion valve. Refer
to
HA-36, "
EXPANSION VALVE
: Removal and Installation".
High-pressure side is excessively
high and low-pressure side is too
low. High-pressure pipe and upper
side of condenser become
hot, however, liquid tank does
not become so hot.Clogged or crushed high-pres-
sure pipe located between
compressor and condenser.
Repair or replace the malfunc-
tioning parts.
High-pressure side is too low and
low-pressure side is too high. • The readings of both sides
become equal soon after
compressor stops.
• There is no temperature dif-
ference between high and
low-pressure sides. Malfunctioning compressor (in-
sufficient compressor pressure
operation).
• Damaged or broken of inter-
nal components.
• Malfunctioning gaskets. Replace compressor. Refer to
HA-26, "
Removal and Installa-
tion".
AC359A
AC360A
AC356A
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