Nissan Primera User Manual
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
A
B
SECTION
AUT OMATIC AIR CONDIT IO NE R
CONTENTS
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint Sys tem
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Working with HFC-134a (R-134a)..... 4
General Refrigerant Precautions .............................. 4
Lubricant P re ca utio ns .............................................. 5
Precautions for Refrigerant Connection ................... 5
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 5
O-RING AND REFRIGERANT CONNECTION ..... 6
Precautions for Servicing Compressor ..................... 7
Precautions for Service Equipment .......................... 8
RECOVERY/RECYCLING EQUIPMENT .............. 8
ELECTRONIC LEAK DETECTOR ........................8
VACUUM PUMP ................................................... 8
MANIFOLD GAUGE SET ...................................... 8
SERVICE HOSES ................................................. 8
SERVICE COUPLERS .......................................... 9
REFRIGERANT WEIGHT SCALE ........................ 9
CALIBRATING ACR4 WEIGHT SCALE ................ 9
CHARGING CYLINDER ........................................ 9
Precautions for Leak Detection Dye ......................... 9
IDENTIFICATION ................................................ 10
IDENTIFICATION LABEL FOR VEHICLE ........... 10
Wiring Diagrams and Trouble Diagnosis ................ 10
PREPARATION ..........................................................11
Special ServiceTools ..............................................11
HFC-134a(R-134a)ServiceTools andEquipment....11
REFRIGERATION SYSTEM ..................................... 15
Refrigerant Cycle ................................................... 15
REFRIGERANT FLOW ....................................... 15
FREEZE PROTECTION ..................................... 15
Refrigerant System Protection ............................... 15
REFRIGERANT PRESSURE SENSOR (WITH
GASOLINE ENGINE) .......................................... 15
DUAL-PRESSURE SWITCH (WITH DIESEL
ENGINE) ............................................................. 15
PRESSURE RELIEF VALVE ............................... 15
V-6 Variable Displacement Compress or ................. 16
GENERAL INFORMATION .................................16
DESCRIPTION ....................................................16
Component Layout .................................................20
LUBRICANT ..............................................................21
Maintenance of Lubricant Quantity inCompres sor...21
LUBRICANT ........................................................2 1
LUBRICANT RETURN OPERATION ..................21
LUBRICANT ADJUSTING PROCEDURE FOR
COMPONENTS REPLACEMENT EXCEPT
COMPRESSOR ..................................................22
LUBRICANT ADJUSTING PROCEDURE FOR
COMPRESSOR REPLACEMENT .......................22
AIR CONDITIONER CONTROL ...............................23
Overview Air Conditioner LAN Control System ......2 3
System Construction ..............................................2 3
OPERATION ........................................................23
TRANSMISSIO N DATAAND T RANSMISSION
ORDER ...............................................................24
AIR MIXDOOR CONTROL (AUTOMAT IC TEM-
PERATURE CONTROL) .....................................24
FANSPEED CO NTROL ......................................25
INTAKE DOOR CONTROL .................................25
OUTLET DOOR CONTROL ................................25
MAGNET CLUTCH CO NTROL ...........................25
SELF-DIAGNOSTIC SYSTEM ............................25
Overview of Control system ....................................25
Control Operation ...................................................26
DISPLAY SCREEN ..............................................26
AUTO SWITCH ...................................................2 6
TEMPERATURE DIAL (POTENTIO TEMPERA-
TURE CONTROL) ...............................................26
A/C SWITCH .......................................................26
DEFROSTER (DEF) SWITCH .............................26
MODE SWITCH ..................................................26
FANSWITCH ......................................................26
OFF SWITCH ......................................................26
FRESH (FRE) SWITCH ......................................26
RECIRCULATION (REC) SWITCH .....................27
REAR WINDOW DEFOGGER SWITCH .............2 7
Fail-safe Function ...................................................27
C
D
E
F
G
H
I
ATC
K
L
M
ATC-1
Discharge Air Flow .................................................28
System Description .................................................29
SWITCHESANDTHEIRCONTROLFUNCTION...29
TROUBLE DIAGNOSIS ............................................30
How to Perform Trouble Diagnos es for Quick and
AccurateRepair ......................................................30
WORK FLOW ......................................................30
SYMPTOM TABLE ..............................................30
ComponentPartsandHarnessConnectorLocation...31
ENGINE COMPARTMENT ..................................31
PASSENGER COMPARTMENT ..........................32
Circuit Diagram .......................................................33
Wiring Diagram ....................................................... 34
Auto Amp. Terminals and Re ference Value ............39
PIN CONNECTOR TERMINAL LAYOUT ............39
AUTO AMP. INSPECTION TABLE ......................39
Self-diagnosis Function ..........................................41
DESCRIPTION ....................................................41
FUNCTION CONFIRMATION PROCEDURE ......42
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 47
Operational Check ..................................................48
CHECKING MEMORY FUNCTION .....................49
CHECKING BLOWER .........................................49
CHECKING DISCHARGE AIR ............................49
CHECKING RECIRCULATION ............................50
CHECKING FRESH SWITCH .............................50
CHECKING TEMPERATURE DECREASE .........51
CHECKING TEMPERATURE INCREASE ..........51
CHECKING AUTO MODE ...................................51
Power Suppl y and Ground Circuit for Auto Amp. ...51
INSPECTION FLOW ...........................................52
COMPONENT DESCRIPTION ............................52
DIAGNOSTIC PRO CEDUREFORA/CSYSTEM...53
LAN System Circuit ................................................54
DIAGNOSTIC PROCEDURE FOR LAN SYS-
TEM CIRCUIT .....................................................54
Mode Door Motor Circuit ........................................56
INSPECTION FLOW ...........................................57
SYSTEM DESCRIPTION ....................................58
COMPONENT DESCRIPTION ............................59
DIAGNOSTIC PROCEDURE FOR MODE
DOOR ..................................................................59
Air Mix Door Motor Circuit ......................................59
INSPECTION FLOW ...........................................60
SYSTEM DESCRIPTION ....................................60
COMPONENT DESCRIPTION ............................62
DIAGNOSTIC PROCEDURE FOR AIR M IX
DOOR MOTOR ................................................... 62
Intake Door Motor Circuit ........................................62
INSPECTION FLOW ...........................................63
SYSTEM DESCRIPTION ....................................64
COMPONENT DESCRIPTION ............................64
DIAGNOSTIC PROCEDURE F OR INTAKE
DOOR MOTOR ................................................... 65
Blower M otor Circuit ...............................................65
INSPECTION FLOW ...........................................66
SYSTEM DESCRIPTION ....................................67
COMPONENT DESCRIPTION ............................68
DIAGNOSTICPROCEDURE FOR BLOWER
MOTOR ................................................................69
COMPONENT INSPECTION ...............................71
Magnet Clutch Circuit ..............................................72
INSPECTION FLOW ............................................ 72
SYSTEM DESCRIPTION .....................................72
DIAGNOSTICPROCEDURE FOR MAGNET
CLUTCH ..............................................................73
COMPONENT INSPECTION ...............................79
Insufficient Cooling ..................................................80
INSPECTION FLOW ............................................ 81
PERFORMANCE TEST DIAGNOSES ................82
PERFORMANCE CHART ....................................84
TROUBLE DIAGNOSES FOR ABNORMAL
PRESSURE .........................................................85
Insufficient Heating .................................................88
INSPECTION FLOW ............................................ 89
Noise .......................................................................90
INSPECTION FLOW ............................................ 91
Self-diagnosis .........................................................91
INSPECTION FLOW ............................................ 92
Memory Function ....................................................92
INSPECTION FLOW ............................................ 93
Ambient Sensor Circuit ...........................................93
COMPONENT DESCRIPTION ............................93
AMBIENT T EMPERATURE INPUT PROCESS ... 93
DIAGNOSTICPROCEDURE FOR AMBIENT
SENSOR ..............................................................94
COMPONENT INSPECTION ...............................95
In-vehicle Sensor Circuit .........................................95
COMPONENT DESCRIPTION ............................95
DIAGNOSTICPROCEDUREFORIN-VEHICLE
SENSOR ..............................................................96
COMPONENT INSPECTION ...............................97
Sunload Sensor Circuit ...........................................98
COMPONENT DESCRIPTION ............................98
SUNLOAD INPUT PROCESS .............................98
DIAGNOSTIC PROCEDURE FOR SUNLOA D
SENSOR ..............................................................98
COMPONENT INSPECTION .............................100
Intake Sensor Circuit .............................................101
COMPONENT DESCRIPTION ..........................101
DIAGNOSTICPROCEDUREFORINTAKE SEN-
SOR ...................................................................101
Multiplex Communication Circuit ...........................102
DIAGNOSTICPROCEDURE FORMULTIPLEX
COMMUNICATION CIRCUIT ............................102
CONTROLLER ........................................................107
Removal and Installation .......................................107
AUTO AMP ..............................................................108
REMOVAL AND INSTALLATION ..........................108
AMBIENT SENSOR ................................................109
Removal and Installation .......................................109
IN-VEHICLE SENSOR ............................................110
Removal and Installation .......................................110
SUNLOAD SENSOR ...............................................111
Removal and Installation ....................................... 111
ATC-2
INTA KE SENSOR CIRCUIT ....................................112
Removal and Installation .......................................112
BLOWER UNIT ........................................................113
Removal and Installation .......................................113
REMOVAL ..........................................................113
INSTALLATION ..................................................113
Disassembly a nd A ssembly ..................................113
BLOWER MOTOR ...................................................114
Removal and Installation .......................................114
INTA KE DOOR MOTOR ..........................................115
Removal and Installation .......................................115
HEATER & COOLING UNIT ASSEMBLY ...............116
Removal and Installation .......................................116
REMOVAL ..........................................................116
INSTALLATION ..................................................117
Disassembly a nd A ssembly ..................................117
MODE DOOR M O TOR ............................................119
Removal and Installation .......................................119
AIR MIX DOOR MOTOR ......................................... 120
Removal and Installation ...................................... 120
FAN CONTROL AMPLIFIER .................................. 121
Removal and Installation ...................................... 121
VENTILATION AIR FILTER .................................... 122
Removal and Installation ...................................... 122
FUNCTION ........................................................ 122
REPLACEMENT TIMING .................................. 122
REPLACEMENT AND PROCEDURES ............ 122
CLEANING ........................................................ 123
HEAT ER CORE ...................................................... 124
Removal and Installation ...................................... 124
DUCTS AND GRILLES .......................................... 125
Removal and Installation ...................................... 125
VENTILATO R DUCT, DEFROST ER NOZZLE
AND DEFROSTER DUCTS .............................. 125
CENTER VENTILATOR GRILLE ...................... 125
SIDE VENTILATOR GRILLE ............................. 125
FOOT DUCT ..................................................... 126
FLOOR DUCT ................................................... 126
REFRIGERANT LINES ........................................... 127
HFC-134a (R-134a) Service Procedure ............... 127
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ................................................................ 127
Components ......................................................... 129
Compressor ..........................................................132
REMOVAL .........................................................132
INSTALLATIO N .................................................134
Compressor Clutch ...............................................135
REMOVAL .........................................................135
INSTALLATIO N .................................................136
Low-pressure F lexible Hose .................................138
REMOVAL .........................................................138
INSTALLATIO N .................................................138
High-pressure Flexible Hose ................................138
REMOVAL .........................................................138
INSTALLATIO N .................................................139
High-pressure Pipe ...............................................139
REMOVAL .........................................................139
INSTALLATIO N .................................................139
RefrigerantPressure Sensor ................................139
REMOVAL AND INSTALLATION ......................139
Dual-pressure Switch ...........................................140
REMOVAL AND INSTALLATION ......................140
Condenser Assembly ...........................................140
REMOVAL .........................................................140
INSTALLATIO N .................................................140
Evaporator ............................................................141
REMOVAL .........................................................141
INSTALLATIO N .................................................141
Expansion Valve ...................................................141
REMOVAL .........................................................141
INSTALLATIO N .................................................142
Checking for RefrigerantLeaks ............................142
Checking Systemfor Leaks Using the Fluorescent
Leak Detector .......................................................142
Dye Injection .........................................................143
Electronic Refrigerant Leak Detector ....................143
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................143
CHECKING PROCEDURE ...............................144
Service D ata and Specifications (S DS ) . ...............145
COMPRESSOR ................................................145
LUBRICANT ......................................................146
REFRIGERANT .................................................146
ENGINE IDLING SPEED ..................................146
BELT TENSION .................................................146
A
B
C
D
E
F
G
H
I
ATC
K
L
M
ATC-3
PRECAUTIONS
PRECAUTIONS
PFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BEL T PRE-TENSIONER”
The Supplemental Restraint System such as "AIR BAG" an d "SEAT BELT PRE-TENSIONER" , us ed along
with a front seat belt, helps to reduce the risk or severity of injury to the driv er and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
● To avoid rendering the SRS inoperative, which could increase t he risk of personal injury or deat h
in the event of a collision which would result in air bag inflati on, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
● Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury cau sed by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
● Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS w iring harnesses can be identified by yellow and/or ora nge harness connectors.
Precautions for Working with HFC-134a (R-134a)
WARNING:
● Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. If lubricant other than that specified is used, compressor failure is likely to occur.
● The specified HFC-134a (R-134a) lubricant rapidly absorbs moistu re from the atmosphere. The fol-
lowing handling precautions must be observed:
– When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
– When installing refrigerant components to a vehicle, do not remove the caps (unseal) until jus t
before connecting the components. Connect all refrigerant loop components as quickly as possibletominimizetheentryofmoistureintosystem.
– Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri-
cant. Without proper sealing, lubricant will become m oisture saturated and should not be used.
– Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove R-134a from the A/C system, using certified service equipment meeting requirements of SA E J2210 (R-134a recycling equipment), or J2209 (R-134a recovery equipment). If accidental system discharge occurs, ventilate work area before resuming service. Additional health
and safety information may be obtained from refrigerant and lubricant manufacturers.
– Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts.
Damage may result.
EJS001PI
EJS001HH
General Refrigerant Precautions
EJS001HI
WARNING:
● Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
● Always wear e ye and hand protection (goggles and gloves) w hen working with any refrigerant or
air conditioning system.
● Do not store or heat refrigerant containers above 52°C(125°F).
● Do not heat a refrigerant container with an open flame; if container warming is required, place the
bottom of the container in a warm pail of water.
● Do not intentionally drop, puncture, or incinerate refrigerant containers.
● Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
● Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent
suffocation.
● Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condi-
tioning systems with compr essed air during repair. Some mixtures of air and R-134a have been
ATC-4
PRECAUTIONS
shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or
property damage. Additional health and safety information may be obtained from refrigerant manufacturers.
A
Lubricant Precautions
● Use only sp ecified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.
EJS001HJ
If lubricant other than that speci fied is us ed, compressor failure is likely to occur.
● The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture from the atm osphere. The following
handling precautions must be observed:
– When removing refrigerant components from a vehicle, immediatel y cap (seal) the component to minimize
the entry of moisture from the atm osphere.
– When installing refrigerant components to a vehic le, do not remove the caps (unseal) until just before con-
necting the components. Connect all refrigerant loop components as quickly as possible to minimize the
entry of moisture into system.
– Only use the sp ecified lubricant from a sealed container. Immediately reseal containers of lubricant. With-
out proper sealing, lubricant will become moisture saturated and should not be used.
● Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat.
Remove R-134a from the A/C system, using certified service equipment meeting requirements of SAE
J2210 (R-134a recycling e quipment), or J2209 (R-134a recovery equipment). If accidental system discharge occurs, v entilate work area before resuming service. Additional health and safety information ma y
be obtained from refrigerant and lubricant manufacturers.
● Do not allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrofoam parts. Damage
may result.
Precautions for Refrigerant Connection
EJS001HK
A new type refrigerant connection has been introduced to all refrigerant line s except the following location.
● Expansion valve to coolin g un it
● Refrige rant pressure sensor to liquid tank
B
C
D
E
F
G
H
I
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
● The O-ring has been relocated. It has also been provided with a groove for proper installation. This e limi-
nates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direction of
the O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing
characterist ics.
● The reaction force of t he O-ring will not occur in the direction that causes the joint to pull out, thereby facil-
itating piping connections.
ATC
K
L
M
ATC-5
SHA815E
PRECAUTIONS
O-RING AND REFRIGERANT CONNECTION
RJIA0685E
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse Orings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or
around, the connection.
O-Ring Part Numbers and Specifications
Connection type
New
Former 92470 N8200 6.07 (0.2390) 1.78 (0.0701)
Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701)
New
Former 92475 71L00 11.0 (0.433) 2.4 (0.094)
New
Former 92475 72L00 14.3 (0.563) 2.3 (0.091)
SHA814E
New
Former 92477 N8200 17.12(0.6740) 1.78 (0.0701)
WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pre ssure in the system is
less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.
CAUTION:
When replacing or cleaning refrigerant cycle components, observe the following.
O-ring
size
8
12
16
19
Part number D mm (in) W mm (in)
92471 N8210 6.8 (0.268) 1.85 (0.0728)
92472 N8210 10.9 (0.429) 2.43 (0.0957)
92473 N8210 13.6 (0.535) 2.43 (0.0957)
92474 N8210 16.5 (0.650) 2.43 (0.0957)
ATC-6
PRECAUTIONS
● When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause lubricant to enter the low pressure chamber.
● When connecting tubes, always use a torque wrench and a back-up wrench.
● After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture .
● When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and other components until just before required for
connection.
● Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
● Thoroughly remove moisture from the refrigeration system before chargingthe refrigerant.
● Always repl ace used O -rings.
● When conn ecting tube, apply lubricant to circle of the O-rings show n in illust ration. Be careful not
to apply lubricant to threaded portion.
Lubricant name: Nissan A/C System Oil Type S
Part number: KLH00-PAGS0
● O-ring must be closely attached to dented portion of tub e.
● When replacing the O-ring, be careful not to dam age O-ring and tube.
● Conn ect tu be until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to t ube correctly.
● After con necting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is found , disconnect that line and replace the O-ring. Then tighten connections of seal seat to the specified torque.
A
B
C
D
E
F
G
H
RHA861F
Precautions for Servicing Compressor
● Plug all openings to prevent moisture and foreign m atter from entering.
● When the compressor is removed, store it in the same position as it is when mounted on the car.
● When replacing or repairing compressor, follow “Maintenance o f Lubricant Quantity in Compres-
sor” exactly. Refer t o ATC-21, "
● Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with lubri-
Maintenance of Lubricant Quantity in Compressor" .
EJS001HL
cant, wipe it off by using a clean waste cloth moistened with thinner.
● After compressor service operation, turn the compressor shaft by hand more than five turns in
both directions. This will equally distribute lubricant inside the compressor. After the compressor
is installed, let the engine idle and operate the compressor for one hour.
● After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation.
I
ATC
K
L
M
ATC-7
PRECAUTIONS
Precautions for Service Equipment
EJS001HM
RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufact urers instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
ELECTRO NIC LEAK DETEC TOR
Be certain to follow the manufacturer's instructions for tester operation and tester maintenance.
VACUUM PUMP
The lubricant containe d inside the vacuum pump is not compatible
with the specified lub ricant for HFC-134a (R-134a) A/C system s.
The vent side of the vacuum pump is exposed to atmospheric pres sure. So the vacuum pump lubricant may migrate out of the pump
into the service hose. This is possible when the pump is switched off
after evacuation (vac uuming) and hose is connected to it.
To prevent this migration, use a manual valve placed near the hoseto-pump connec tion, as follows.
● Usually vacuum pumps have a manual isolator valve as part of
the pump. Close this valve to isolate the service hose from the
pump.
● For pumps without an isolator, use a hose equipped with a man-
ual shut-off valve near the pump end. Close the valve to isolate
the hose from the pump.
● If the hose has a n automatic shut off valve, disconnect the hose
from the pump. As long as the hose is connected, the valve is
open and lubricating oil may migr ate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump's
ability to pull a deep vacuum and are not recommended.
MANIFOLD GAUGE SET
Be certain that the gauge face indicates R-134a or 134a. Be sure the
gauge set has 1/2″-16 ACME threaded connections for service
hoses. Confirm the set has been used only with refrigerant HFC134a (R-134a) and specified lubricants.
SERVICE HOSES
Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive shut
off devices (either manual or automatic) near the end of the hoses
opposite the manifold gauge.
RHA270DA
SHA533D
ATC-8
RHA272D
PRECAUTIONS
SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to an
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
A
B
C
RHA273D
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC-134a (R-134a) and specified lubricants have been used with the scale. If the scale controls
refrigerant flow electronically, the hose fitting must be 1/2″-16
ACME.
RHA274D
CALIBRATING ACR4 WEIGHT SCALE
Calibrate the scale every three months.
To calibrate the weight scale on the ACR4:
1. PressShift/Re set and Enter at the sametime.
2. Press8787 .“A1 ” will be displayed.
3. R emove all weight from the scale.
4. Press0 ,thenpressEnte r .“0.00 ” will be displayed and change to “A2 ”.
5. Plac e a known weight (dumbbell or similar weight), between 4.5 and 8.6 kg (10 and 19 lb) on the center of
the weight scale.
6. Enter the known weight using four digits. (Example 10 lb = 10.00, 10.5 lb = 10.50)
7. PressEnter — the display re turns to the vacuum mode.
8. PressShift/Re set and Enter at the sametime.
9. Press6 — the known weight on the scale is displayed.
10. Remove the known weight from the scale. “0.00 ” will be d isplayed.
11. Press Shift/Reset to return the ACR4 to the program mode.
D
E
F
G
H
I
ATC
K
L
M
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 tha n that of an
electronic scale or of quality recycle/recharge equipment.
Precautions for Leak Detection Dye
● The A/C system contains a fluorescent leak detection dye used for locating refrigerantleaks. A n ultraviolet
EJS001HN
(UV) lamp is required to illuminate the dye when inspecting for leaks.
● Always wear fluorescence enhancing UV safety glasses to protect your eyes and enhance the visibility of
the fluorescent dye.
● The fluorescent dye leak detector is n ot a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector shoul d be used in conjunction with an electronic refrigerant leak detector to (J-
41995) pin-point refrigerant leaks.
ATC-9
PRECAUTIONS
● For your safety and your Customer's satisfaction, read and follow al l manufacture's operating instructions
and precautions prior to performing the work.
● A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal
should only be repaired after confirming the l eak with an electronic refrigerant leak detector (J-41995).
● Always remove any remaining dye from the leak area after repairs are complete to avoid a misdiagnosis
during a future service.
● Do not allow dye to come i nto contact with painted body panels or interi or components. If dye is spilled,
clean immediately wi th the approved dye clea ner. Fluorescent dye left on a surface for an extended period
of time cannot be removed.
● Do not s pray the fluorescent dye cle aning agent on hot surfaces (engine exhaust manifold, etc.).
● Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.
● Leak detection dyes for R-134a and R12 A/C systems are different. Do not use R-134a leak detection dye
in R-12 A/C system or R-12 leak de tector dye in R-134a A/C systems or A/C system damage may result.
● The fluorescent pr operties of the dye will rem ain for over three (3) years unless a compressor f ailure
occurs.
IDENTIFICATION
NOTE:
Vehicles with factory installed fluorescent dye have a green label.
Vehicles without factory installed fluorescent dye h ave a blue label.
IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have this identification
label on the front side of hood.
Wiring Diagrams and Trouble Diagnosis
When you read wiring diagrams, refer to the followings:
● GI-14, "How to Read Wiring Diagrams" in GI section.
● PG-4, "Wir ing Diagram — POWER —"in PG section.
When you perform troubl e diagnosis, refer to the followings:
● GI-10, "How to Follow Trouble Diagnoses" in GI section.
● GI-24, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.
SHA436FA
EJS001HO
ATC-10
PREPARATION
PREPARATION PFP:00002
Special Service Tools
EJS001OJ
A
T ool number
Tool name
KV99106100
Clutch disc wrench
KV99232340
or
KV992T0001
Clutch disc puller
Description
S-NT232
RJIA0194E
S-NT376
Removingshaft nut and clutch disc
Removingclutch disc
B
C
D
E
F
G
H
I
KV99106200
Pulley installer
S-NT235
HFC-134a (R-134a) Service Tools and Equipment
Installing pulley
EJS001HQ
Never mix HFC-134a refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/or its lubricant.
Separate and non-interchangeable service equi pment must be used for handling each type of refrigerant/lubricant.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.
Adapters that convert one s ize fitting to another must never be used: refrigerant/lubricant contamination will
occur and compressor failure will result.
ATC
K
L
M
ATC-11
PREPARATION
Tool number
Tool name
HFC-134a(R-134a)refrigerant
KLH00-PAGS 0
Nissan A/C System Oil Type S
Recovery/Recycling/
Recharging equipment (ACR4)
Description
S-NT196
S-NT197
Container color: Lightblue
Container marking: HFC-134a (R134a)
Fitting size: Thread size
● large container 1/2
2
-16 A CME
Type : Poly alkylene glycol oil (PAG),
type S
Application: HFC-134a (R-134a)
swash plate compressors (Nissan
only)
Lubricity: 40 ml [Litre] (1.4 Imp fl oz)
Function: Refrigerant Recovery and
Recycling and Recharging
Electrical leak detector
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220) UV lamp and UVsafety
glasses
(J-41459) Refrigerant dye injector
(J-41447) qty. 24
HFC-134a(R-134a)refrigerant
dye
(J-43872) Refrigerant dye cleaner
RJIA0195E
Powersupply:
DC 12V (Cigarette lighter)
SHA705EB
Powersupply:
DC 12V (Battery terminal)
ZHA200H
ATC-12
PREPARATION
T ool number
Tool name
(J-42220)
Fluorescent dye leak detector
(J-41447)
HFC-134a (R-134a) Fluorescent
leak detection dye
(Box of 24, 1/4 ounce bottles)
(J-41459)
HFC-134a (R-134a)Dye injector
Use withJ-41447, 1/4 ounce
bottle
Description
SHA438F
SHA439F
SHA440F
Power supply: DC 12V (Battery
terminal)
For checking refrigerant leak when
fluorescent dye is installed in A/C
system.
Includes: UV lamp and UV safety
glasses
Application: For HFC-134a (R-134a)
PAG oil
Container: 1/4 ounce (7.4 cc) bottle
(Includes self-adhesive dye
identification labels for affixing to
vehicle after charging system with
dye.)
For injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.
A
B
C
D
E
F
G
H
(J-43872)
Dye cleaner
Manifoldgauge set (with hoses
and couplers)
Service hoses
● High side hose
● Low side hose
● U t ility hose
SHA441F
S-NT201
RJIA0196E
For cleaning dye spills.
Identification:
● The gauge face indicates R-134a.
Fitting size: Thread size
2
● 1/2
-16 ACME
Hose color:
● Low hose: Blue with black stripe
● High hose: Red with black stripe
● U tility hose:Yellow with b lack stripe
or green with black stripe
Hose fitting to gauge:
2
● 1/2
-16 ACME
I
ATC
K
L
M
ATC-13
PREPARATION
Tool number
Tool name
Service couplers
● Highside coupler
● Low side coupler
Refrigerant weight scale
Vacuum pump
(Including the isolatorvalve)
Description
S-NT202
S-NT200
S-NT203
Hose fitting to service hose:
● M14 x 1.5 fitting is optional or
permanently attached.
For measuring of refrigerant
Fitting size: Thread size
2
● 1/2
-16 ACME
Capacity:
● Air displacement:4 CFM
● Micron rating:20 microns
● Oil capacity:482 g (17 oz)
Fitting size: Thread size
2
● 1/2
-16 ACME
ATC-14
REFRIGERATION SYSTEM
REFRIGERATION SYSTEM PFP:KA990
Refrigerant Cycle
REFRIGERA NT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser with liquid tank,
through the evaporator, and back to the compressor. The refrigerant evaporation through the evaporator coil is
controlled by an externally equalized expansion valve, located inside the evaporator case.
EJS001HR
A
B
FREEZE PROTECT ION
Under normal operating condi tions, when the A/C is switched on, the compressor runs continuously, and the
evaporator pressure, and therefore, temperature is controlled by the V-6 variable displacement compressor to
prevent freeze up.
Refrigerant System Protection
EJS001HS
REFRIGERANT PRESSURE SENSO R (WITH GASOLINE ENGINE)
The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sensor, located on the liquid tank. If the system pressure rises above, or falls below the specifications, the refrigerant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
ECM makes the A/C relay go OFF and stops the compressor when pressure on the high pressure side
2
detected by refrigerant pressure sensor is over about 2,746 kPa (27.5 bar, 28 kg/cm
2
about 134 kPa (1.37 bar, 1. 4 kg/c m
,20psi).
, 398 psi), or below
DUAL-PRESSURE SWITCH (WITH DIESEL ENGINE)
The refrigerant system is protected against excessively high or low pressures by the dual-pressure switch,
located on the liquid tank. If the system pressure rises above or falls below the specifications, the dual-pressure switch opens to interrupt the compressor operation.
PRESSURE RELIEF VALVE
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pres sure of refrige rant in the system increases to an abnormal level [more than 3,727 kPa (37.3 bar,
2
38 kg/cm
ant into theatmosphere.
, 540 psi)], the release port on the pressure relief valve automatically opens and releases refriger-
C
D
E
F
G
H
I
ATC
RHA682H
K
L
M
ATC-15
REFRIGERATION SYSTEM
V-6 Variable Displacement Compressor
EJS001HT
GENERAL INFORMATION
1. The V-6 variable compressor differs from previous units. The vent temperatures of the V-6 variable compressor do not drop too far below 5°C(41°F) wh en:
Evaporator intake air tempera ture is less than 20°C(68°F).
Engine is running at speeds less than 1,500 rpm.
This is because the V-6 compressor provides a means of "capacity" control.
2. The V-6 variable compressor provides refrig erant control under varying conditions. During cold winters, it
may not produce high r efrigerant pr essure discharge (compared to previous units) when used with air
conditioning systems.
3. A "clanking" sound may occasionally be heard during refrigerant charg e. The sound indicates that the tilt
angle of the swash pla te has changed and is not a problem.
4. For air conditioning systems with the V-6 compressor, the clutch remains engaged unless: the system
main switch, fan switch or ignition switch is turned OFF. W hen ambient (outside) temperatures are low or
when the amount of refrigerant is insufficient, the clutch is disengaged to protect the compressor.
5. A constant range of suction pressure is maintained when engine speed is greater than a c ertain value. It
2
normally ranges fr om 147 to 177 kPa (1.47 to 1.77 bar, 1.5 to 1.8 kg/cm
ditions.
In previous compressors, however, suction pr essure was reduced with inc reases in engine speed.
, 21 to 26 psi) under varying con-
DESCRIPTION
General
For QR EngineModels (CWV615 Compressor):
The var iable compressor is basically a s wash plate type that changes p iston stroke in response to the required
cooling capacity.
ATC-16
REFRIGERATION SYSTEM
The tilt of the swash plate allows the piston's stroke to change so that refrigerant discharge can be continuously changed from 14.5 to 146 cm
3
(0.885 to 8.91 cu in).
A
B
C
D
E
F
G
RHA037DD
Except for QR Engine Models (CSV613 Compressor):
The variable compressor is basically a s wash plate type that changes piston str oke in response to the required
cooling capacity.
H
I
ATC
K
L
M
ATC-17
REFRIGERATION SYSTEM
The tilt of the sw ash plate allows the piston's stroke to change so that refrigerant discharge can be continuously changed from 6.0 to 125 cm
3
(0.366 to 7.628 cu in).
RHA854HA
Operation
1. Operation Control Valve
Operation control valve is located in the suctio n port (low-pressure) side, and opens or closes in response
to changes in refrigerant suction pressure.
Operation of the valve controls the inter nal pressure of the crankcase.
The angle of the swash plate is controlled between the crankcase's internal pressur e and the piston cyl inder pressure.
2. Maximum Co oling
Refrigerant pressure on the low-pressure side increases with an increase in heat loads.
When this occurs, the control v alve's bellows compress to open the low-pressure side valve and close the
high-pressure side valve.
This causes the following pressure changes:
ATC-18
REFRIGERATION SYSTEM
● The crankcase's internal pressure to equal the pressure on the low-pressure side;
● The cyl inder's internal pressure to be greater than the crankcase's inte rnal pressure.
Under this condition, the swash plate is set to the maximum str oke position.
A
B
C
D
E
F
RHA473C
3. CapacityControl
● Refrigerant pressure on suction side is l ow during high speed driving or when ambient or interior temperature is low.
● The bellows expands when refrig erant pressure on the suctio n pressure side drops below app roxi-
2
mately 177 kPa (1.77 bar, 1.8 kg/c m
,26psi).
Since suction pressure is low, it makes the suction port close and the discharge port open. Thus, crankcase pressure becomes high as high pressure e nters the crankcase.
● The force acts around the journal pin near the swash plate, and is generated by the pressure difference
before and behind the piston.
The drive lug and journal pin are located where the piston generates the highest pressure. Piston pr essure is between suction pressure Ps a nd discharge pressure Pd, which is near suction pressure Ps. If
crankcase pressure Pc rises due to capacity control, the force around the journal pin makes the swash
plate angle decrease and also the piston stroke decrease. In other words, crankcase pressure increase
triggers pr essure difference between the piston and the crankcase. The pressure difference changes the
angle of the swash plate.
G
H
I
ATC
K
L
M
ATC-19
RHA474C
REFRIGERATION SYSTEM
Component Layout
EJS001HU
ATC-20
RJIA0686E
LUBRICANT
LUBRICANT PFP:KLG00
Maintenance of Lubricant Quantity in Compressor
The lubricant in the compressor circul ates through the system with the refrigerant. Add lubricant to compressor when replacing any component or after a large gas leakage occurred. It is important to maintain the specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
● Lack of lubricant: May lead to a seized compress or
● Excessive lubricant: Inadequa te cool ing (thermal exchange interference)
LUBRICANT
Name Nissan A/C System Oil Type S
Part number KLH00-PAGS0
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
EJS001HV
1. CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?
● A/C system works properly.
● There is no evidence of a larg e amount of lubricant leakage.
Yes or No
Yes >>GOTO2.
No >> GO TO 3.
A
B
C
D
E
F
G
H
2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS:
1. Start engine, and set the following conditions:
– Test condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperatur e is 25 to 30°C (77 to 86°F).]
Intake position: Recirculation(REC)
2. Perform lubricant return operation for about 10 minutes.
3. Stop engine.
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant return operation.
>> GO TO 3.
3. CH ECK COM PRESSOR
Should the compressor be replaced?
Yes or No
Yes >> Go to ATC-22, "LUBR ICANT ADJUSTING PROCEDUR E FOR COMPRESSOR REPLACE-
MENT" .
No >> GO TO 4.
I
ATC
K
L
M
ATC-21
LUBRICANT
4. CHECK ANY PART
Is there any part to be replaced? (Evaporator, condenser, liquid tank or in case there is evidence of a large
amount of lubricant leakage.)
Yes or No
Yes >> Go to ATC-22, "LUBRICANT ADJUSTING PRO CEDURE FOR COMPONENTS RE PLACEMENT
EXCEPT C O MPR ESSO R" .
No >> Carry out the A/C performance test.
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACEMENT EXCEPT COMPRESSOR
After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of lubricant to be added
Lubricant to be added to system
Part replaced
Evaporator 75 (2.6) Condenser 35 (1.2) Liquid tank 10 (0.4) -
In case of refrigerant leak
*1:If refrigerantleak is small, no addition of lubricantis needed.
Amount of lubricant
ml [Litre] (Imp fl oz)
30 (1.1) Large leak
- Small leak *1
Remarks
LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REP LACEMENT
1. Before connecting ACR4 to vehicle, check ACR4 gauges. No refrigerant pressure should be displa yed. If
NG, recover refrigerant from equipment lines.
2. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.
3. Drain the lubricant from the old (removed) compressor into a graduated container and recover the amount
of lubricant drained.
4. Drain the lubricant from the new compressor into a separate, clean container.
5. Measure an amount of n ew lubricant installed equal to amount drained from old compressor. Add this
lubricant to new compressor through the suction port opening.
6. Measure an amount of new lubricant equal to the amount recovered d uring dis charging. Add this lubricant
to new compressor through the suction port opening.
7. If the liquid tank also needs to be replaced, add an additional 5 ml [Litre] (0.2 Imp fl oz ) of lubr icant at this
time.
Do not add this 5 ml (0.2 Imp fl oz) of lubricant if only replacing the compressor.
ATC-22
AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL PFP:27500
Overview Air Conditioner LAN Control System
The LAN system consists of auto amp., m ode door motor, air mix door motor and intake door motor.
A configuration of these c omponents is shown in the diagram belo w.
EJS001HW
RJIA0480E
A
B
C
D
E
System Construction
EJS001HX
A small network is constructed between the auto amplifier, air mix door motor and mode door motor. The auto
amplifier and motors are connected by data transmission lines and moto r power supply lines. The LAN network is built through the groun d ci rcuits o f the two motors.
Addresses, motor opening angle signals, motor stop signals and error checking messages are al l transmitted
through the data transmissi on lines connecting the auto amplifier and two motors.
The following functions are contained in LCUs built into the air mix door motor and the mode door motor.
● Address
● Motor open ing angle signals
● Data transmission
● Motor stop and dri ve dec ision
● Openin g angle sensor (PBR function)
● Comparison
● Decision (Auto amplifier indicated value and motor opening angle comparison)
F
G
H
I
ATC
K
L
M
RHA350H
OPERATION
The auto amplifier receives data from each of the sensors. The amplifier sends mode door, air mix door and
intake door opening ang le data to the mo de door motor LCU, a ir mix door motor LC U and intake door motor
LCU.
The mode door motor, air mix door motor and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the auto amplifier and each of the motor position sensors are compare d by the LCUs in each motor with the existing decision and opening angles. Subsequently, HOT/COLD, DE FROST/VENT or FRESH/RECIRCULATION operation is selected. T he n ew selection
data is returnedto the auto amplifier.
ATC-23
AIR CONDITIONER CONTROL
RHA351H
TRANSMISSION DATA AND TRANSMISSION ORDER
Amplifier data is transmitted consecutively to each of the door motors follow ing the form shown in figure below.
Start: Initial compulsory signal sent to each of the door motors.
Address: Data sent from the auto amplifier is selected according to data-based decisions made by the air mix
door motor, mode do or motor and intake door motor.
If the addresses are identical, the opening angle data and error check signals are received by the door motor
LCUs. The LCUs then make the appropriate error decision. If the opening angle data is normal, door control
begins.
If an error exists, the received data is rejected and corrected data re ceived. Finally, door control is based upon
the corrected opening angle data.
Opening angle:
Data that shows the indicated door opening angle of each door motor.
Error check:
Procedure by which sent and received data is checked for er rors. Error data is then compiled. The error check
prevents corrupted data from being used by the air mix door motor, mode door motor and intake door motor.
Error data can be related to the following problems.
● Abnormal electrical fre quency
● Poor electrical connections
● Signal leakage from transmission li nes
● Signal level fluctuation
Stop signal:
At the end of each transmission, a stop operation, in-operation, or internal problem message is del ivered to
the auto amplifier. This completes one data transmission and control cycle.
RHA352H
AIR MIX DOOR CONTROL (AUTOMATIC TEMPERATURE CONTROL)
The air mix door is automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by: The temperature setting, ambient temperature, in-vehicle temperature and amount of sunload.
ATC-24
AIR CONDITIONER CONTROL
FAN SPEED CONTROL
Blower speed is automatically controlled based on tempera ture setting, ambient temperature, in-vehicle temperature, intake temperature, amount of sunload and air mix door position.
With FAN switch set to AUTO, the blower motor starts to gradually increase air flow volume.
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flowing.
INTAKE DOOR CONTROL
The intake doors are automatically controlled by: The temperature setting, ambient temperature, in-vehic le
temperature, intake temperature, amount of sunload and ON-OFF operation of the co mpressor.
A
B
C
OUTLET DOOR CONTROL
The outlet door is automatically controlled by: The temperature setting, ambient temperature, in-vehicle temperature, intake temperature and amount of sunload.
MAGNET CLUTCH CONTROL
The ECM controls c ompressor operation using i nput signals from the refrigerant pressure sensor, throttle position sensor and auto amp lifi er.
SELF-DIAGNOSTIC SYSTEM
The self-diagnostic system is built into the auto amplifier (LCU) to quickly locate the cause of problems .
Overview of Control system
The control syste m consists of input sensors, switches, the automatic amplifier (microcomputer) and outputs.
The relationship of thes e components is shown in the diagram below:
EJS001HY
D
E
F
G
H
I
ATC
K
ATC-25
L
M
RJIA0687E
AIR CONDITIONER CONTROL
Control Operation
EJS001HZ
RJIA0688E
DISPLAY SCREEN
Displays the operational status of the system.
AUTO SWITCH
The compressor, intake doors, air mix doors, outlet doors and blow er speed are automatically controlled so
that the in-vehicle temperature will reach, and be maintained at the set temper ature selected by the operator.
TEMPERATURE DIAL (POTENTIO TEMPERATURE CONTROL)
Increase or decrease the set temperature.
A/C SWITCH
The compresso r is ON or OFF.
(Pressing the A/C switch when the AUTO switch is ON will turn off the A/C switch and compressor.)
DEFROSTER (DEF) SWITCH
Positions the air outlet doors to the defros t position. Also positions the intake doors to the outside air position.
MODE SWITCH
Control the air discharge outlets.
FAN SWITCH
Manually controls the blower speed. Five speeds are available for manual control (as shown on the display
screen).
OFF SWITCH
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot position.
FRESH (F RE) SWITCH
OFF position: Interior air is recirculated inside the vehicle.
ON position: Outside air is drawn into the passenger compartment.
ATC-26
AIR CONDITIONER CONTROL
(When RECIRCULATION switch is ON, the FRESH switch turns OFF automatically.)
RECIRCULATION (REC) SWITCH
OFF position: Outside air is drawn into the passenger compartment.
ON position: Interior a ir is drawn into the passenger compartment.
(When the FRESH switch is ON or the compr essor is turned from ON to OFF, the RECIRCULATION switch
turns OFF automatically.)
A
B
REAR WINDOW DEFOGGER SWITCH
When illumination is ON, rear window is defogged.
Fail-safe Function
If fail-safe r equest signal is sen t from AV control unit, or if communication error exists between auto amp.lifier
and AV control unit for at least 30 seconds, air conditioner is controlled under following conditions.
Compressor : ON
Air inlet : Fresh
Air outlet : AUTO
Blower fan speed : AUTO
Set temperature : Setting before communicationerror occurs
EJS001OK
C
D
E
F
G
H
I
ATC
K
M
L
ATC-27
AIR CONDITIONER CONTROL
Discharge Air Flow
EJS001I0
ATC-28
RJIA0689E
AIR CONDITIONER CONTROL
System Description
SWITCHES AND THEIR CONTROL FUNCTION
EJS001I1
RHA592H
A
B
C
D
E
F
G
H
RJIA0846E
I
ATC
K
L
M
ATC-29
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
PFP:00004
How to Perform Trouble Diagnoses for Quick and Accurate Repair
WORK FLOW
SHA900E
*1 ATC-48, "Operational Check"
SYMPTOM TABLE
Symptom Reference Page
ATC-51, "
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C system.
Air outlet does not change.
Mode door motor does not operate normally.
Discharge air temperature does not change.
Air mix door motor does not operate normally.
Intakedoor does not change.
Intakedoor motor doesnot operate normally.
Blowermotor operation is malfunctioning.
Blowermotor operation is malfunctioning
under out of starting fan speed control.
Magnetclutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch.
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling.
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.
Noise Go to TroubleDiagnosis Procedure for Noise. ATC-90, "Noise"
Self-diagnosis can not be performed. Go to Trouble Diagnosis Procedure for Self-diagnosis.
Memory function does not operate. Go to Trouble Diagnosis Procedure for Memory Function.
A/C system cannot be controlled.
Go to TroubleDiagnosis Procedure for Mode Door Motor. (LAN)
Go to Trouble DiagnosisProcedurefor Air Mix Door Motor. (LAN)
Go to Trouble Diagnosis Procedure for Intake Door Motor.(LAN)
Go to Trouble Diagnosis Procedure for Blower Motor.
Go to Trouble Diagnosis Procedurefor Multiplex Communication
Circuit.
GroundCircuitfor
ATC-56, "Mode
DoorMotorCir-
ATC-59, "
DoorMotorCir-
ATC-62, "
DoorMotorCir-
ATC-65, "
Motor Circuit"
ATC-72, "
Clutch Circuit"
ATC-80, "
cient Cooling"
ATC-88, "
cient Heating"
ATC-91, "
ATC-92, "
ATC-102,"
plex Communica-
Power
Supply and
Auto Amp."
cuit"
Air Mix
cuit"
Intake
cuit"
Blower
Magnet
Insuffi-
Insuffi-
Self-
diagnosis"
Memory
Function"
Multi-
tion Circuit"
EJS001OL
ATC-30
Loading...