AUTOMATIC AIR CONDITIONER

J AIR CONDITIONER

SECTION
AUTOMATIC AIR CONDITIONER
ATC B

E
CONTENTS
PRECAUTIONS .......................................................... 4 LUBRICANT .............................................................. 24 F
Precautions for Supplemental Restraint System Maintenance of Lubricant Quantity in Compressor... 24
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN- LUBRICANT ........................................................ 24
SIONER” .................................................................. 4 CHECKING AND ADJUSTING ............................ 24 G
Precautions for Working with HFC-134a (R-134a)..... 4 AIR CONDITIONER CONTROL ............................... 26
Contaminated Refrigerant ........................................ 4 Description .............................................................. 26
General Refrigerant Precautions .............................. 5 Operation ................................................................ 26
H
Precautions for Refrigerant Connection ................... 5 AIR MIX DOORS CONTROL .............................. 26
ABOUT ONE-TOUCH JOINT ................................ 5 BLOWER SPEED CONTROL ............................. 26
FEATURES OF NEW TYPE REFRIGERANT INTAKE DOOR CONTROL ................................. 26
CONNECTION ...................................................... 7 MODE DOOR CONTROL ................................... 26 I
O-RING AND REFRIGERANT CONNECTION..... 9 DEFROSTER DOOR CONTROL ........................ 26
Precautions for Servicing Compressor ................... 12 MAGNET CLUTCH CONTROL ........................... 27
Precautions for Service Equipment ........................ 12 SELF-DIAGNOSTIC SYSTEM ............................ 27 ATC
RECOVERY/RECYCLING EQUIPMENT ............ 12 Description of Control System ................................ 28
ELECTRONIC LEAK DETECTOR ...................... 12 Control Operation ................................................... 28
VACUUM PUMP ................................................. 13 DISPLAY SCREEN .............................................. 29
K
MANIFOLD GAUGE SET .................................... 13 AUTO SWITCH ................................................... 29
SERVICE HOSES ............................................... 13 TEMPERATURE CONTROL DIAL (TEMPERA-
SERVICE COUPLERS ........................................ 14 TURE CONTROL) (DRIVER SIDE) ..................... 29
REFRIGERANT WEIGHT SCALE ...................... 14 TEMPERATURE CONTROL DIAL (TEMPERA- L
CALIBRATING ACR4 WEIGHT SCALE .............. 14 TURE CONTROL) (PASSENGER SIDE) ............ 29
CHARGING CYLINDER ...................................... 14 TEMPERATURE CONTROL DIAL (TEMPERA-
Precautions for Leak Detection Dye ....................... 14 TURE AND MODE CONTROL) (REAR) ............. 29 M
IDENTIFICATION ................................................ 15 RECIRCULATION (REC) SWITCH ..................... 29
IDENTIFICATION LABEL FOR VEHICLE ........... 15 DEFROSTER (DEF) SWITCH ............................. 29
Wiring Diagrams and Trouble Diagnosis ................ 15 REAR WINDOW DEFOGGER SWITCH ............. 29
PREPARATION ......................................................... 16 OFF SWITCH ...................................................... 29
Special Service Tools ............................................. 16 A/C SWITCH ....................................................... 29
HFC-134a (R-134a) Service Tools and Equipment... 16 MODE SWITCH (FRONT) ................................... 29
Commercial Service Tools ...................................... 19 FRONT BLOWER CONTROL DIAL .................... 29
REFRIGERATION SYSTEM ..................................... 20 MODE SWITCH (REAR) ..................................... 29
Refrigerant Cycle ................................................... 20 Discharge Air Flow ................................................. 30
REFRIGERANT FLOW ....................................... 20 FRONT ................................................................ 30
FREEZE PROTECTION ..................................... 20 System Description ................................................. 31
Refrigerant System Protection ............................... 20 SWITCHES AND THEIR CONTROL FUNCTION... 31
REFRIGERANT PRESSURE SENSOR ............. 20 CAN Communication System Description .............. 32
PRESSURE RELIEF VALVE ............................... 21 TROUBLE DIAGNOSIS ............................................ 33
Components ........................................................... 22 CONSULT-II Function (BCM) ................................. 33
REFRIGERATION SYSTEM ............................... 22 CONSULT-II BASIC OPERATION ....................... 33

ATC-1
 DATA MONITOR .................................................. 34 Magnet Clutch Circuit ..............................................87
How to Perform Trouble Diagnosis for Quick and INSPECTION FLOW ............................................87
Accurate Repair ...................................................... 35 SYSTEM DESCRIPTION .....................................88
WORK FLOW ...................................................... 35 DIAGNOSTIC PROCEDURE FOR MAGNET
SYMPTOM TABLE .............................................. 35 CLUTCH ..............................................................88
ComponentParts and Harness Connector Location... 36 COMPONENT INSPECTION ...............................92
ENGINE COMPARTMENT .................................. 36 Insufficient Cooling ..................................................93
FRONT PASSENGER COMPARTMENT ............ 37 INSPECTION FLOW ............................................93
Schematic —LHD MODELS— ............................... 38 PERFORMANCE TEST DIAGNOSES ................94
Wiring Diagram —A/C— —LHD MODELS— ......... 39 PERFORMANCE CHART ....................................96
Schematic —RHD MODELS— ............................... 46 TROUBLE DIAGNOSES FOR UNUSUAL PRES-
Wiring Diadram —A/C— —RHD MODELS— ......... 47 SURE ...................................................................97
Front Air Control Terminals and Reference Value... 53 Insufficient Heating ............................................... 100
PIN CONNECTOR TERMINAL LAYOUT ............ 53 INSPECTION FLOW .......................................... 100
TERMINALS AND REFERENCE VALUE FOR Noise ..................................................................... 101
FRONT AIR CONTROL ....................................... 53 INSPECTION FLOW .......................................... 101
A/C System Self-diagnosis Function ...................... 55 Self-diagnosis ....................................................... 103
DESCRIPTION .................................................... 55 INSPECTION FLOW .......................................... 103
Operational Check .................................................. 57 Memory Function .................................................. 104
CHECKING MEMORY FUNCTION ..................... 57 INSPECTION FLOW .......................................... 104
CHECKING BLOWER ......................................... 57 Ambient Sensor Circuit ......................................... 105
CHECKING DISCHARGE AIR ............................ 58 COMPONENT DESCRIPTION .......................... 105
CHECKING RECIRCULATION ............................ 58 AMBIENT TEMPERATURE INPUT PROCESS.105
CHECKING TEMPERATURE DECREASE ......... 58 DIAGNOSTIC PROCEDURE FOR AMBIENT
CHECKING TEMPERATURE INCREASE .......... 59 SENSOR ............................................................ 105
CHECK A/C SWITCH .......................................... 59 COMPONENT INSPECTION ............................. 107
CHECKING AUTO MODE ................................... 59 In-vehicle Sensor Circuit ....................................... 108
Power Supply and Ground Circuit for Front Air Con- COMPONENT DESCRIPTION .......................... 108
trol ........................................................................... 60 DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
INSPECTION FLOW ........................................... 60 SENSOR ............................................................ 109
COMPONENT DESCRIPTION ............................ 61 COMPONENT INSPECTION ............................. 111
DIAGNOSTIC PROCEDURE FORA/C SYSTEM... 61 Optical Sensor Circuit ........................................... 112
Mode Door Motor Circuit ........................................ 63 COMPONENT DESCRIPTION .......................... 112
INSPECTION FLOW ........................................... 63 OPTICAL INPUT PROCESS ............................. 112
SYSTEM DESCRIPTION .................................... 64 DIAGNOSTIC PROCEDURE FOR SUNLOAD
COMPONENT DESCRIPTION ............................ 65 SENSOR ............................................................ 112
DIAGNOSTIC PROCEDURE FOR MODE Intake Sensor Circuit ............................................. 114
DOOR MOTOR ................................................... 65 COMPONENT DESCRIPTION .......................... 114
Air Mix Door Motor Circuit ...................................... 68 DIAGNOSTICPROCEDUREFORINTAKESEN-
INSPECTION FLOW ........................................... 68 SOR ................................................................... 114
SYSTEM DESCRIPTION .................................... 69 COMPONENT INSPECTION ............................. 115
COMPONENT DESCRIPTION ............................ 70 CONTROL UNIT ...................................................... 116
DIAGNOSTIC PROCEDURE FOR AIR MIX Removal and Installation ....................................... 116
DOOR MOTOR (DRIVER) ................................... 71 REMOVAL .......................................................... 116
DIAGNOSTIC PROCEDURE FOR AIR MIX INSTALLATION .................................................. 116
DOOR MOTOR (PASSENGER) .......................... 73 AMBIENT SENSOR ................................................ 117
Intake Door Motor Circuit ........................................ 77 Removal and Installation ....................................... 117
INSPECTION FLOW ........................................... 77 REMOVAL .......................................................... 117
SYSTEM DESCRIPTION .................................... 78 INSTALLATION .................................................. 117
COMPONENT DESCRIPTION ............................ 79 IN-VEHICLE SENSOR ............................................ 118
DIAGNOSTIC PROCEDURE FOR INTAKE Removal and Installation ....................................... 118
DOOR MOTOR ................................................... 79 REMOVAL .......................................................... 118
Blower Motor Circuit ............................................... 80 INSTALLATION .................................................. 118
INSPECTION FLOW ........................................... 80 OPTICAL SENSOR ................................................. 119
SYSTEM DESCRIPTION .................................... 81 Removal and Installation ....................................... 119
COMPONENT DESCRIPTION ............................ 82 INTAKE SENSOR .................................................... 120
DIAGNOSTIC PROCEDURE FOR BLOWER Removal and Installation ....................................... 120
MOTOR ............................................................... 82 REMOVAL .......................................................... 120
COMPONENT INSPECTION .............................. 86 INSTALLATION .................................................. 120

ATC-2
BLOWER MOTOR .................................................. 121 REFRIGERANT LINES ........................................... 138
Components ......................................................... 121 HFC-134a (R-134a) Service Procedure ............... 138 A
Removal and Installation ...................................... 121 SETTING OF SERVICE TOOLS AND EQUIP-
REMOVAL ......................................................... 121 MENT ................................................................ 138
INSTALLATION ................................................. 121 Components ......................................................... 140 B
AIR CONDITIONER FILTER ................................... 122 Removal and Installation for Compressor ............ 142
Removal and Installation ...................................... 122 REMOVAL ......................................................... 142
FUNCTION ........................................................ 122 INSTALLATION ................................................. 142
REPLACEMENT TIMING .................................. 122 Removal and Installation for Compressor Clutch . 143 C
REPLACEMENT PROCEDURE ....................... 122 REMOVAL ......................................................... 143
HEATER & COOLING UNIT ASSEMBLY .............. 124 INSPECTION .................................................... 144
Components ......................................................... 124 INSTALLATION ................................................. 144 D
Removal and Installation ...................................... 126 BREAK-IN OPERATION .................................... 146
REMOVAL ......................................................... 126 Removal andInstallation for High-pressure Flexible
INSTALLATION ................................................. 126 A/C Hose .............................................................. 146 E
HEATER CORE ...................................................... 127 REMOVAL ......................................................... 146
Components ......................................................... 127 INSTALLATION ................................................. 146
Removal and Installation ...................................... 127 Removal and Installation for High-pressure A/C
REMOVAL ......................................................... 127 Pipe ...................................................................... 146 F
INSTALLATION ................................................. 127 REMOVAL ......................................................... 146
HEATER PUMP ...................................................... 128 INSTALLATION ................................................. 146
Components ......................................................... 128 Removal and Installation for Low-pressure Flexible G
Removal and Installation ...................................... 128 A/C Hose .............................................................. 146
REMOVAL ......................................................... 128 REMOVAL ......................................................... 146
INSTALLATION ................................................. 128 INSTALLATION ................................................. 146 H
INTAKE DOOR MOTOR ......................................... 129 RemovalandInstallationforLow-pressureA/CPipe. 147
Components ......................................................... 129 REMOVAL ......................................................... 147
Removal and Installation ...................................... 129 INSTALLATION ................................................. 147
I
REMOVAL ......................................................... 129 Removal and Installation for Refrigerant Pressure
INSTALLATION ................................................. 129 Sensor .................................................................. 147
MODE DOOR MOTOR ........................................... 130 REMOVAL ......................................................... 147
Components ......................................................... 130 INSTALLATION ................................................. 147 ATC
Removal and Installation ...................................... 130 Removal and Installation for Condenser .............. 147
REMOVAL ......................................................... 130 REMOVAL ......................................................... 147
INSTALLATION ................................................. 130 INSTALLATION ................................................. 148 K
AIR MIX DOOR MOTOR ......................................... 131 Removal and Installation for Evaporator .............. 149
Components ......................................................... 131 REMOVAL ......................................................... 149
Removal and Installation ...................................... 131 INSTALLATION ................................................. 149 L
AIR MIX DOOR MOTOR (DRIVER) .................. 131 Removal and Installation for Expansion Valve ...... 150
AIR MIX DOOR MOTOR (PASSENGER) ......... 131 REMOVAL ......................................................... 150
VARIABLE BLOWER CONTROL .......................... 133 INSTALLATION ................................................. 150
Components ......................................................... 133 Checking for Refrigerant Leaks ............................ 150 M
Removal and Installation ...................................... 133 Checking System for Leaks Using the Fluorescent
REMOVAL ......................................................... 133 Leak Detector ....................................................... 150
INSTALLATION ................................................. 133 Dye Injection ......................................................... 151
DUCTS AND GRILLES .......................................... 134 Electronic Refrigerant Leak Detector .................... 151
Components ......................................................... 134 PRECAUTIONS FOR HANDLING LEAK
Removal and Installation ...................................... 136 DETECTOR ....................................................... 151
CONSOLE DUCTS AND CONSOLE GRILLE . 136 CHECKING PROCEDURE ............................... 152
DEFROSTER NOZZLE ..................................... 136 SERVICE DATA AND SPECIFICATIONS (SDS) .... 154
RH AND LH SIDE DEMISTER DUCT ............... 136 Service Data and Specifications (SDS) ................ 154
RH AND LH VENTILATOR DUCT ..................... 136 COMPRESSOR ................................................ 154
CENTER VENTILATOR DUCT ......................... 136 LUBRICANT ...................................................... 154
FLOOR CONNECTOR DUCT ........................... 136 REFRIGERANT ................................................. 154
FRONT AND REAR FLOOR DUCTS ............... 137 ENGINE IDLING SPEED .................................. 154
REAR OVERHEAD DUCTS .............................. 137 BELT TENSION ................................................. 154
SIDE REAR FLOOR DUCT .............................. 137
GRILLES ........................................................... 137

ATC-3
 PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER” EJS006AK

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver 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 the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
● Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused 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 wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Working with HFC-134a (R-134a) EJS006AL

WARNING:
● CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. These refrigerants
must never be mixed, even in the smallest amounts. If the refrigerants are mixed and compressor
malfunction is likely occur.
● 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 malfunction is likely to occur.
● The specified HFC-134a (R-134a) lubricant rapidly absorbs moisture 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 just
before connecting the components. Connect all refrigerant loop components as quickly as possi-
ble to minimize the entry of moisture into system.
– Only use the specified lubricant from a sealed container. Immediately reseal containers of lubri-
cant. Without 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. Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refriger-
ant. If accidental system discharge occurs, ventilate work area before resuming service. Addi-
tional 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.
Contaminated Refrigerant EJS006AM

If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:
● Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant
into the atmosphere.
● Explain that recovery of the contaminated refrigerant could damage your service equipment and refriger-
ant supply.
● Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.
● If you choose to perform the repair, recover the refrigerant using only dedicated equipment and contain-
ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility
does not have dedicated recovery equipment, you may contact a local refrigerant product retailer for avail-
able service. This refrigerant must be disposed of in accordance with all federal and local regulations. In
addition, replacement of all refrigerant system components on the vehicle is recommended.

ATC-4
 PRECAUTIONS

● If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN
Customer Affairs for further assistance. A
General Refrigerant Precautions EJS006AN

WARNING: B
● 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 eye and hand protection (goggles and gloves) when working with any refrigerant or
C
air conditioning system.
● Do not store or heat refrigerant containers above 52°C.
● Do not heat a refrigerant container with an open flame; if container warming is required, place the
D
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. E
● 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- F
tioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a)
have been 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 refriger-
ant manufacturers. G

Precautions for Refrigerant Connection EJS006AO

A new type refrigerant connection has been introduced to all refrigerant lines except the following locations. H
● Expansion valve to cooling unit
● Evaporator pipes to evaporator (inside cooling unit)
● Refrigerant pressure sensor I

ABOUT ONE-TOUCH JOINT

Description ATC
● One-touch joints are pipe joints which do not require tools during piping connection.
● Unlike conventional connection methods using union nuts and flanges, controlling tightening torque at
connection point is not necessary. K
● When removing a pipe joint, use a disconnector.
COMPONENT PARTS
L

RJIA0970E

ATC-5
 PRECAUTIONS

FUNCTIONS OF COMPONENT PARTS

● Retains O-rings.
Pipe (Male side)
● Retains garter spring in cage.
Garter spring Anchors female side piping.
When connection is made properly, this is ejected from male-side piping. (This part is no longer neces-
Indicator ring
sary after connection.)
O-ring Seals connection point. (Not reusable)
● Seals connection by compressing O-rings.
Pipe (Female side)
● Anchors piping connection using flare and garter spring.

NOTE:
● Garter spring cannot be removed from cage of male-side piping.
● Indicator ring remains near piping connection point, however, this is not a malfunction. (This is to check
piping connection during factory assembly.)
REMOVAL

SJIA0106E

1. Clean piping connection point, and set a disconnector.

2. Slide disconnector in axial direction of piping, and stretch garter spring with tapered point of disconnector.
3. Slide disconnector farther so that inside diameter of garter spring becomes larger than outside diameter of
female-side piping flare. Then male-side piping can be disconnected.

ATC-6
 PRECAUTIONS

INSTALLATION
A

SJIA0107E

1. Clean piping connection points, and insert male-side piping into female-side piping. G
2. Push inserted male-side piping harder so that female-side piping flare stretches garter spring.
3. If inside diameter of garter spring becomes larger than outside diameter of female-side piping flare, garter
spring seats on flare. Then, it fits in between male-side piping cage and female-side piping flare to anchor H
piping connection point.
NOTICE:
When garter spring seats on flare, and fits in between male-side piping cage and female-side piping flare, I
it clicks.
CAUTION:
● Female-side piping connection point is thin. So, when inserting male-side piping, take care not
ATC
to deform female-side piping. Slowly insert it in axial direction.
● Insert piping securely until a click is heard.

● After piping connection is completed, pull male-side piping by hand to make sure connection
K
does not come loose.
NOTE:
One-touch joint connection is used in points below.
L
● Low-pressure flexible hose to evaporator (O-ring size: 16)

● High-pressure flexible hose to condenser (O-ring size: 12)

● High-pressure pipe 1 to high-pressure pipe 2 (O-ring size: 8) M

● High-pressure pipe 1 to condenser (O-ring size: 8)

FEATURES OF NEW TYPE REFRIGERANT CONNECTION

● The O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi-
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
characteristics.

ATC-7
 PRECAUTIONS

● The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facil-
itating piping connections.

SHA815E

ATC-8
 PRECAUTIONS

O-RING AND REFRIGERANT CONNECTION

A
A/C Compressor and Condenser —LHD Models—

ATC

MJIB0276E

1. High-pressure service valve 2. Clip 3. High-pressure A/C pipe

4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible A/C hose 8. Low-pressure flexible A/C hose 9. Low-pressure service valve
10. Low-pressure A/C pipe 11. Expansion valve 12. A/C drain hose

ATC-9
 PRECAUTIONS

A/C Compressor and Condenser —RHD Models—

MJIB0277E

1. High-pressure service valve 2. Clip 3. High-pressure A/C pipe

4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible A/C hose 8. Low-pressure flexible A/C hose 9. Low-pressure service valve
10. Low-pressure A/C pipe 11. Expansion valve 12. A/C drain hose

CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse O-
rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at or
around the connection.

ATC-10
 PRECAUTIONS

O-Ring Part Numbers and Specifications

Connec- O-ring
A
Part number* D mm (in) W mm (in)
tion type size
New 8 92471 N8210 6.8 (0.268) 1.85 (0.0728)
B
Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701)
New 92472 N8210 10.9 (0.429) 2.43 (0.0957)
12
Former 92475 71L00 11.0 (0.433) 2.4 (0.094) C
New 92473 N8210 13.6 (0.535) 2.43 (0.0957)
16
Former 92475 72L00 14.3 (0.563) 2.3 (0.091)
New 92474 N8210 16.5 (0.650) 2.43 (0.0957)
D
19
SHA814E Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701)
New 24 92195 AH300 21.8 (0.858) 2.4 (0.094) E
*: Always check with the Parts Department for the latest parts information.
WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is F
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. G
● 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. H
● 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 I
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. ATC
● Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
● Always replace used O-rings.
● When connecting tube, apply lubricant to circle of the O-rings shown in illustration. Be careful not K
to apply lubricant to threaded portion.
Lubricant name: Genuine NISSAN A/C System Lubricant Type S (DH-PS) or equivalent
Part number: KLH00-PAGS0
L
● O-ring must be closely attached to dented portion of tube.
● When replacing the O-ring, be careful not to damage O-ring and tube.
● Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that M
the O-ring is installed to tube correctly.

ATC-11
 PRECAUTIONS

● After connecting 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 con-
nections of seal seat to the specified torque.

RHA861F

Precautions for Servicing Compressor EJS006AP

● Plug all openings to prevent moisture and foreign matter 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 of Lubricant Quantity in Compres-
sor” exactly. Refer to ATC-154, "Service Data and Specifications (SDS)" .
● Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with lubri-
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 usual
operation.
Precautions for Service Equipment EJS006AQ

RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.

ATC-12
 PRECAUTIONS

VACUUM PUMP
The lubricant contained inside the vacuum pump is not compatible A
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric pres-
sure. So the vacuum pump lubricant may migrate out of the pump B
into the service hose. This is possible when the pump is switched off
after evacuation (vacuuming) and hose is connected to it.
To prevent this migration, use a manual valve placed near the hose-
to-pump connection, as follows. C
● Usually vacuum pumps have a manual isolator valve as part of
the pump. Close this valve to isolate the service hose from the
pump. D
● 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. E
● If the hose has an 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 migrate. F
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.
G

RHA270DA

MANIFOLD GAUGE SET H

Be certain that the gauge face indicates HFC-134a or R-134a. Be
sure the gauge set has 1/2″-16 ACME threaded connections for ser-
vice hoses. Confirm the set has been used only with refrigerant I
HFC-134a (R-134a) and specified lubricants.

ATC

K
SHA533D

SERVICE HOSES L
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. M

RHA272D

ATC-13
 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

RHA273D

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFC-134a (R-134a) and speci-
fied 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. Press “Shift/Reset ” and “Enter” at the same time.
2. Press “8787” . “A1 ” will be displayed.
3. Remove all weight from the scale.
4. Press “0” , then press “Enter” . “0.00 ” will be displayed and change to “A2 ”.
5. Place 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. Press “Enter” — the display returns to the vacuum mode.
8. Press “Shift/Reset ” and “Enter” at the same time.
9. Press “6 ” — the known weight on the scale is displayed.
10. Remove the known weight from the scale. “0.00 ” will be displayed.
11. Press “Shift/Reset ” to return the ACR4 to the program mode.
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.
Precautions for Leak Detection Dye EJS006AR

● The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet
(UV) lamp is required to illuminate the dye when inspecting for leaks.
● Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of
the fluorescent dye.
● The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (J-
41995) to pin-point refrigerant leaks.
● For your safety and your customer’s satisfaction, read and follow all manufacture’s operating instructions
and precautions prior to performing the work.
ATC-14
 PRECAUTIONS

● A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal
should only be repaired after confirming the leak with an electronic refrigerant leak detector (J-41995). A
● 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 into contact with painted body panels or interior components. If dye is spilled, B
clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period
of time cannot be removed.
● Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.). C
● Do not use more than one refrigerant dye bottle (1/4 ounce /7.4 cc) per A/C system.
● Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use
HFC-134a (R-134a) leak detection dye in CFC-12 (R-12) A/C system or CFC-12 (R-12) leak detector dye D
in HFC-134a (R-134a) A/C systems or A/C system damage may result.
● The fluorescent properties of the dye will remain for over three (3) years unless a compressor malfunction
occurs. E
IDENTIFICATION
NOTE:
Vehicles with factory installed fluorescent dye have a green label. F
Vehicles without factory installed fluorescent dye have a blue label.
IDENTIFICATION LABEL FOR VEHICLE
Vehicles with factory installed fluorescent dye have this identification G
label on the front side of hood.

ATC
SHA749F

Wiring Diagrams and Trouble Diagnosis EJS006AS

When you read wiring diagrams, refer to the following: K

● GI-15, "How to Read Wiring Diagrams"
● PG-4, "POWER SUPPLY ROUTING CIRCUIT"
L
When you perform trouble diagnosis, refer to the following:
● GI-11, "How to Follow Trouble Diagnoses"
● GI-24, "How to Perform Efficient Diagnosis for an Electrical Incident" M

ATC-15
 PREPARATION

PREPARATION PFP:00002

Special Service Tools EJS006AT

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
Description
Tool name

KV99106200 Installing pulley

Pulley installer

S-NT235

KV99233130 Removing pulley

Pulley puller

LHA172

HFC-134a (R-134a) Service Tools and Equipment EJS006AU

Never mix HFC-134a (R-134a) refrigerant and/or its specified lubricant with CFC-12 (R-12) refrigerant and/or
its lubricant.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/lubri-
cant.
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 size fitting to another must never be used: refrigerant/lubricant contamination will
occur and compressor malfunction will result.
Tool number
Description
Tool name

Container color: Light blue

Container marking: HFC-134a (R-
HFC-134a (R-134a) refrigerant 134a)
Fitting size: Thread size
● Large container 1/2″-16 ACME
S-NT196

Type: Polyalkylene glycol oil (PAG),

type S (DH-PS)
KLH00-PAGS0
Application: HFC-134a (R-134a)
Nissan A/C System Oil Type S
wobble (swash) plate compressors
(DH-PS)
(Nissan only)
Lubricity: 40 m (1.4 Imp fl oz.)
S-NT197

ATC-16
 PREPARATION

Tool number
Description A
Tool name

Recovery/Recycling/ Function: Refrigerant recovery and C

Recharging equipment (ACR4) recycling and recharging

RJIA0195E

F
Power supply:
Electrical leak detector
DC 12V (Cigarette lighter)
G

SHA705EB H
(J-43926)
Refrigerant dye leak detection kit
Kit includes: I
(J-42220)
UV lamp and UV safety goggles
(J-41459)
HFC-134a (R-134a) dye injector ATC
Power supply:
Use with J-41447, 1/4 ounce
DC 12V (Battery terminal)
bottle
(J-41447)
HFC-134a (R-134a) fluorescent K
leak detection dye
(Box of 24, 1/4 ounce bottles)
(J-43872) ZHA200H
L
Refrigerant dye cleaner

Power supply:
DC 12V (Battery terminal) M
For checking refrigerant leak when
(J-42220)
fluorescent dye is installed in A/C
UV lamp and UV safety goggles
system
Includes:
UV lamp and UV safety goggles
SHA438F

Application: For HFC-134a (R-134a)

PAG oil
(J-41447)
Container: 1/4 ounce (7.4 cc) bottle
HFC-134a (R-134a) fluorescent
(Includes self-adhesive dye
leak detection dye
identification labels for affixing to
(Box of 24, 1/4 ounce bottles)
vehicle after charging system with
dye.)
SHA439F

ATC-17
 PREPARATION

Tool number
Description
Tool name

(J-41459)
HFC-134a (R-134a) dye injector For injecting 1/4 ounce of fluorescent
Use with J-41447, 1/4 ounce leak detection dye into A/C system.
bottle

SHA440F

(J-43872)
For cleaning dye spills.
Refrigerant dye cleaner

SHA441F

Identification:
● The gauge face indicates HFC-134a
Manifold gauge set (with hoses (R-134a).
and couplers)
Fitting size: Thread size
● 1/2″-16 ACME

RJIA0196E

Hose color:
● Low hose: Blue with black stripe
Service hoses
● High hose: Red with black stripe
● High-pressure side hose
● Utility hose: Yellow with black stripe
● Low-pressure side hose
or green with black stripe
● Utility hose
Hose fitting to gauge:
S-NT201
● 1/2″-16 ACME

Service couplers Hose fitting to service hose:

● High-pressure side coupler M14 x 1.5 fitting is optional or
● Low-pressure side coupler permanently attached.

S-NT202

For measuring of refrigerant

Refrigerant weight scale Fitting size: Thread size
1/2″-16 ACME

S-NT200

Capacity:
● Air displacement: 4 CFM
Vacuum pump ● Micron rating: 20 microns
(Including the isolator valve) ● Oil capacity: 482 g (17 oz.)
Fitting size: Thread size

S-NT203
● 1/2″-16 ACME

ATC-18
 PREPARATION

Commercial Service Tools EJS006AV

A
Tool number
Description
Tool name

(J-44614)
Clutch disk holding tool
Clutch disk holding tool C

WHA230
D

ATC

ATC-19
 REFRIGERATION SYSTEM

REFRIGERATION SYSTEM PFP:KA990

Refrigerant Cycle EJS006AW

REFRIGERANT 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 is
controlled by an externally equalized expansion valve, located inside the evaporator case.
FREEZE PROTECTION
Under usual operating conditions, 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 EJS006AX

REFRIGERANT PRESSURE SENSOR

The refrigerant system is protected against excessively high or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above or falls below the specifications, the refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM.
The ECM de-energizes the A/C relay to disengage the magnetic compressor clutch when pressure on the high
pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm2 , 398 psi), or below
about 120 kPa (1.22 kg/cm2 , 17.4 psi).

ATC-20
 REFRIGERATION SYSTEM

PRESSURE RELIEF VALVE

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor. A
When the pressure of refrigerant in the system increases to an abnormal level [more than 2,990 kPa (30.5 kg/
cm2 , 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant
into the atmosphere. B

ATC

MJIB0323E

ATC-21
 REFRIGERATION SYSTEM

Components EJS006AY

REFRIGERATION SYSTEM

MJIB0209E

ATC-22
 REFRIGERATION SYSTEM

1. Defroster nozzle 2. LH side demister duct 3. LH ventilator duct

4. RH side demister duct 5. RH ventilator duct 6. Center ventilation duct
A
7. Heater and cooling unit assembly 8. Floor connector duct grilles 9. Floor connector duct
10. Front floor duct 11. Rear floor duct
B

ATC

ATC-23
 LUBRICANT

LUBRICANT PFP:KLG00

Maintenance of Lubricant Quantity in Compressor EJS006AZ

The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large refrigerant leakage has 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 compressor
● Excessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
Name: NISSAN A/C System Lubricant Type S (DH-PS) or equivalent
Part number: KLH00-PAGS0
CHECKING AND ADJUSTING
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant return operation.
Start the engine and set the following conditions:
Test Condition
● Engine speed: Idling to 1,200 rpm
● A/C switch: On
● Blower speed: Max. position
● Temp. control: Optional [Set so that intake air temperature is 25° to 30° C (77° to 86°F)]
● Intake position: Recirculation ( )
● Perform lubricant return operation for about ten minutes
Adjust the lubricant quantity according to the following table.
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 Amount of lubricant Remarks
m (Imp fl oz)
Evaporator 75 (2.6) —
Condenser 75 (2.6) —
Liquid tank 5 (0.2) Add if compressor is not replaced.
30 (1.1) Large leak
In case of refrigerant leak
— Small leak *1

● *1: If refrigerant leak is small, no addition of lubricant is needed.

Lubricant Adjustment Procedure for Compressor Replacement

1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges.
No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
2. Connect recovery/recycling equipment to vehicle. Confirm refrigerant purity in supply tank using recovery/
recycling equipment and refrigerant identifier. If NG, refer to ATC-4, "Contaminated Refrigerant" .
3. Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identi-
fier. If NG, refer to ATC-4, "Contaminated Refrigerant" .
4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into
the recovery/recycling equipment.
5. Drain the lubricant from the “old” (removed) compressor into a graduated container and recover the
amount of lubricant drained.
6. Drain the lubricant from the “new” compressor into a separate, clean container.
7. Measure an amount of new lubricant installed equal to amount drained from “old” compressor. Add this
lubricant to “new” compressor through the suction port opening.

ATC-24
 LUBRICANT

8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to “new” compressor through the suction port opening. A
9. If the liquid tank also needs to be replaced, add an additional 5 m (0.2 Imp fl oz) of lubricant at this time.
Do not add this 5 m (0.2 Imp fl oz) of lubricant if only replacing the compressor.
B

ATC
RHA065DI

ATC-25
 AIR CONDITIONER CONTROL

AIR CONDITIONER CONTROL PFP:27500

Description EJS006B0

The front air control provides automatic regulation of the vehicle's interior temperature. The system is based
on the driver's and passenger's selected “set temperature”, regardless of the outside temperature changes.
This is done by utilizing a microcomputer, also referred to as the front air control, which receives input signals
from the following six sensors:
● Ambient sensor
● In-vehicle sensor
● Intake sensor
● Optical sensor (one sensor for driver and passenger side)
● PBR (Position Balanced Resistor).
● Vehicle speed sensor
The front air control uses these signals (including the set temperature) to automatically control:
● Outlet air volume
● Air temperature
● Air distribution
The front air control is used to select:
● Outlet air volume
● Air temperature/distribution
Operation EJS006B1

AIR MIX DOORS CONTROL

The air mix doors are 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.
BLOWER SPEED CONTROL
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
When AUTO switch is pressed, the blower motor starts to gradually increase air flow volume (if required).
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
INTAKE DOOR CONTROL
The intake door is automatically controlled by the temperature setting, ambient temperature, in-vehicle tem-
perature, intake temperature, amount of sunload and the ON-OFF operation of the compressor.
MODE DOOR CONTROL
The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload.
DEFROSTER DOOR CONTROL
The defroster door is controlled by: Turning the defroster dial to front defroster.

ATC-26
 AIR CONDITIONER CONTROL

MAGNET CLUTCH CONTROL

A

WJIA1163E

G
When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sen-
sor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON sig- H
nal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor. I
SELF-DIAGNOSTIC SYSTEM
The self-diagnostic system is built into the front air control to quickly locate the cause of symptoms. Refer to
ATC-55, "A/C System Self-diagnosis Function" . ATC

ATC-27
 AIR CONDITIONER CONTROL

Description of Control System EJS006B2

The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:

WJIA1279E

Control Operation EJS006B3

Front air control

MJIB0333E

ATC-28
 AIR CONDITIONER CONTROL

DISPLAY SCREEN
Displays the operational status of the system. A

AUTO SWITCH
● The compressor, intake door, air mix doors, outlet doors and blower speed are automatically controlled so B
that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the oper-
ator.
● When pressing AUTO switch, air inlet, air outlet, blower speed, and discharge air temperature are auto-
matically controlled. C

TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL) (DRIVER SIDE)

Increases or decreases the set temperature. D
TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL) (PASSENGER SIDE)
Increases or decreases the set temperature.
E
TEMPERATURE CONTROL DIAL (TEMPERATURE AND MODE CONTROL) (REAR)
Increases or decreases the set temperature. The mode also changes from foot at full hot setting, to foot/vent
mid-range (warm) setting, and then to vent on full cold setting. F
RECIRCULATION (REC) SWITCH
● When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
● When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automati- G
cally turned OFF. REC mode can be re-entered by pressing REC switch again.
● REC switch is not operated when DEF switch is turned ON, or at the D/F position.
H
DEFROSTER (DEF) SWITCH
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.
REAR WINDOW DEFOGGER SWITCH I
When switch is ON, rear window is defogged.
OFF SWITCH
ATC
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 (75% foot and 25% defrost) position.
A/C SWITCH K
The compressor is ON or OFF.
(Pressing the A/C switch when the AUTO switch is ON will turn off the A/C switch and compressor.)
MODE SWITCH (FRONT) L
Controls the air discharge outlets.
FRONT BLOWER CONTROL DIAL M
Manually control the blower speed. Seven speeds are available for manual control (as shown on the display
screen).
MODE SWITCH (REAR)
Controls the air/temperature at discharge outlets.

ATC-29
 AIR CONDITIONER CONTROL

Discharge Air Flow EJS006B4

FRONT

LJIA0172E

MJIB0284E

ATC-30
 AIR CONDITIONER CONTROL

System Description EJS006B5

SWITCHES AND THEIR CONTROL FUNCTION A

I
MJIB0220E

ATC

WJIA1237E

ATC-31
 AIR CONDITIONER CONTROL

CAN Communication System Description EJS006B7

Refer to LAN-23, "CAN COMMUNICATION" .

ATC-32
 TROUBLE DIAGNOSIS

TROUBLE DIAGNOSIS PFP:00004

A
CONSULT-II Function (BCM) EJS006B8

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
BCM diagnostic B
Diagnostic mode Description
test item
Supports inspections and adjustments. Commands are transmitted to the BCM
WORK SUPPORT for setting the status suitable for required operation, input/output signals are C
received from the BCM and received data is displayed.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them. D
Inspection by part
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
E
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.

F
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be G
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II converter to the data link connector, and turn the ignition
switch ON. H

ATC

WJIA1078E

2. Touch “START (NISSAN BASED VHCL)”. K

BCIA0029E

3. Touch “BCM” on “SELECT SYSTEM” screen.

If “BCM” is not indicated, go to GI-50, "CONSULT-II Data Link
Connector (DLC) Circuit" .

BCIA0030E

ATC-33
 TROUBLE DIAGNOSIS

DATA MONITOR
Operation Procedure
1. Touch “AIR CONDITIONER” on “SELECT TEST ITEM” screen.

WJIA0468E

2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.

BCIA0031E

3. Touch either “ALL SIGNALS” or “SELECTION FROM MENU” on

“DATA MONITOR” screen.
All signals Monitors all the items.
Selection from menu Selects and monitors the individual item selected.

4. When “SELECTION FROM MENU” is selected, touch items to

be monitored. When “ALL SIGNALS” is selected, all the items
will be monitored.
5. Touch “START”.
6. Touch “RECORD” while monitoring, then the status of the moni- WJIA0469E
tored item can be recorded. To stop recording, touch “STOP”.
Display Item List
Monitor item name
Contents
“OPERATION OR UNIT”
IGN ON SW “ON/OFF” Displays “IGN Position (ON)/OFF, ACC Position (OFF)” status as judged from ignition switch signal.
COMP ON SIG “ON/OFF” Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
FAN ON SIG “ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower motor switch signal.

ATC-34
 TROUBLE DIAGNOSIS

How to Perform Trouble Diagnosis for Quick and Accurate Repair EJS006B9

WORK FLOW A

D
SHA900E

*1 ATC-57, "Operational Check".

E
SYMPTOM TABLE
Symptom Reference Page
ATC-60, "Power F
Supply and
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C System.
Ground Circuit for
Front Air Control"
G
AV-61, "Navigation
A/C system display is malfunctioning. Go to "Navigation System".
System"
ATC-55, "A/C Sys-
H
A/C system cannot be controlled. Go to Self-diagnosis Function. tem Self-diagno-
sis Function"
Air outlet does not change. ATC-63, "Mode
Go to Trouble Diagnosis Procedure for Mode Door Motor. Door Motor Cir- I
Mode door motor is malfunctioning. cuit"
Discharge air temperature does not change. ATC-68, "Air Mix
Go to Trouble Diagnosis Procedure for Air Mix Door Motor. Door Motor Cir- ATC
Air mix door motor is malfunctioning. cuit"
Intake door does not change. ATC-77, "Intake
Go to Trouble Diagnosis Procedure for Intake Door Motor. Door Motor Cir-
Intake door motor is malfunctioning. K
cuit"
Defroster door motor is malfunctioning. Go to Trouble Diagnosis Procedure for Defroster Door Motor.
ATC-80, "Blower L
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor.
Motor Circuit"
ATC-87, "Magnet
Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch.
Clutch Circuit"
M
ATC-93, "Insuffi-
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling.
cient Cooling"
ATC-100, "Insuffi-
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.
cient Heating"
Noise Go to Trouble Diagnosis Procedure for Noise. ATC-101, "Noise"
ATC-103, "Self-
Self-diagnosis cannot be performed. Go to Trouble Diagnosis Procedure for Self-diagnosis.
diagnosis"
ATC-104, "Mem-
Memory function does not operate. Go to Trouble Diagnosis Procedure for Memory Function.
ory Function"

ATC-35
 TROUBLE DIAGNOSIS

Component Parts and Harness Connector Location EJS006BA

ENGINE COMPARTMENT

MJIB0155E

ATC-36
 TROUBLE DIAGNOSIS

FRONT PASSENGER COMPARTMENT

A

ATC

MJIB0326E

ATC-37
 TROUBLE DIAGNOSIS

Schematic —LHD MODELS— EJS006BB

MJWA0176E

ATC-38
 TROUBLE DIAGNOSIS

Wiring Diagram —A/C— —LHD MODELS— EJS006BC

ATC

MJWA0177E

ATC-39
TROUBLE DIAGNOSIS

MJWA0178E

ATC-40
TROUBLE DIAGNOSIS

ATC

MJWA0179E

ATC-41
TROUBLE DIAGNOSIS

MJWA0180E

ATC-42
TROUBLE DIAGNOSIS

ATC

MJWA0181E

ATC-43
TROUBLE DIAGNOSIS

MJWA0182E

ATC-44
TROUBLE DIAGNOSIS

ATC

MJWA0183E

ATC-45
 TROUBLE DIAGNOSIS

Schematic —RHD MODELS— EJS006BD

MJWA0184E

ATC-46
 TROUBLE DIAGNOSIS

Wiring Diadram —A/C— —RHD MODELS— EJS006BE

ATC

MJWA0185E

ATC-47
TROUBLE DIAGNOSIS

MJWA0186E

ATC-48
TROUBLE DIAGNOSIS

ATC

MJWA0187E

ATC-49
TROUBLE DIAGNOSIS

MJWA0188E

ATC-50
TROUBLE DIAGNOSIS

ATC

MJWA0189E

ATC-51
TROUBLE DIAGNOSIS

MJWA0190E

ATC-52
 TROUBLE DIAGNOSIS

Front Air Control Terminals and Reference Value EJS006BF

A
Measure voltage between each terminal and ground by following
Terminals and Reference Value for front air control.

D
MJIB0327E

PIN CONNECTOR TERMINAL LAYOUT

E

MJIB0159E H
TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL
Termi- Wire Ignition Voltage (V)
Item Condition I
nal No. color switch (Approx.)
1 BR Mode door motor CW ON Clockwise rotation Battery voltage
2 W Air mix door motor (Driver) CW ON Clockwise rotation Battery voltage
ATC
3 G Air mix door motor (Driver) CCW ON Counterclockwise rotation Battery voltage
4 Y Intake door motor CW ON Counterclockwise rotation Battery voltage
5 O Intake door motor CCW ON Clockwise rotation Battery voltage K
6 P Power supply for IGN ON - Battery voltage
Seat heater ON Battery voltage
7 Y Seat heater (LHD models) ON L
Seat heater OFF 0V
8 G Illumination + ON Park lamps ON Battery voltage
M

9 B Illumination - - Park lamps ON

PIIA2344E

ON A/C switch OFF 5V

10 W Compressor ON signal
ON A/C switch ON 0V
11 Y Rear defrost request ON - Battery voltage
12 L Intake sensor ON - 0 - 5V
13 V Sensor ground ON - 0 - 5V
14 R Mode door motor CCW ON Counterclockwise rotation Battery voltage
15 P Air mix door motor (Passenger) CW ON Clockwise rotation Battery voltage
Air mix door motor (Passenger)
16 LG ON Counter clockwise rotation Battery voltage
CCW

ATC-53
 TROUBLE DIAGNOSIS

Termi- Wire Ignition Voltage (V)

Item Condition
nal No. color switch (Approx.)
19 GR Power supply for BAT - - Battery voltage
20 B Ground - - 0V
21 V Mode door motor feedback ON - 0 - 5V
22 SB Air mix door motor (Driver) feedback ON - 0 - 5V
23 G Sensor power ON - 5V
26 P Sensor return ON - 0V
27 R In-vehicle sensor signal ON - 0 - 5V
28 W Ambient sensor ON - 0 - 5V
29 G Optical sensor (Driver) ON - 0 - 5V

PTC heater relay 1 Relay ON Battery voltage

31 P ON
(LHD models) Relay OFF 0V
32 V Variable blower control ON - 0 - 5V
33 BR In-vehicle sensor motor (+) ON - Battery voltage
34 O In-vehicle sensor motor (-) ON - 0V
ON Blower switch OFF 5V
35 LG Fan ON signal
ON Blower switch ON 0V
Air mix door motor (Passenger)
36 SB ON - 0 - 5V
feedback
37 GR Optical sensor (Passenger) ON - 0 - 5V
Blower motor OFF Battery voltage
38 B Blower request ON
Blower motor ON 0V

PTC heater relay 2 Relay ON Battery voltage

40 LG ON
(LHD models) Relay OFF 0V
41 L CAN-H ON - 0 - 5V
42 P CAN-L ON - 0 - 5V

PTC heater relay 3 Relay ON Battery voltage

43 BR ON
(LHD models) Relay OFF 0V
Heater OFF 0V
44 R Mirror heater (LHD models) ON
Heater ON Battery voltage

ATC-54
 TROUBLE DIAGNOSIS

A/C System Self-diagnosis Function EJS006BG

DESCRIPTION A
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. Refer to applicable sections
(items) for details. Shifting from usual control to the self-diagnostic system is accomplished by turning the igni-
tion switch ON and pressing the down blower arrow switch while turning the passenger temperature dial in B
either direction (hold momentarily). Within 3 seconds of doing this, press the AUTO switch. The blower bars
will flash and the ambient temperature display will indicate 0° during the self-diagnosis. Fault codes (if any are
present) will be displayed in the ambient temperature display area. Refer to ATC-56, "SELF-DIAGNOSIS
C
CODE CHART" .

MJIB0334E
I

ATC

ATC-55
 TROUBLE DIAGNOSIS

SELF-DIAGNOSIS CODE CHART

Code No. Reference page
02 EE changed by calibration ATC-116, "REMOVAL"
ATC-73, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
12 Air mix door motor (Driver) circuit malfunction
MOTOR (PASSENGER)"
ATC-88, "DIAGNOSTIC PROCEDURE FOR MAGNET
20 BCM not responding to A/C request
CLUTCH"
21 BCM not responding to rear defroster request GW-47, "REAR WINDOW DEFOGGER"
ATC-71, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
22 Air mix door motor (Passenger) circuit malfunction
MOTOR (DRIVER)"
30 In-vehicle sensor circuit out of range (low)
ATC-108, "In-vehicle Sensor Circuit"
31 In-vehicle sensor circuit out of range (high)
40 Ambient sensor 1 circuit short
ATC-105, "Ambient Sensor Circuit"
41 Ambient sensor 1 circuit open
50 Optical sensor (Driver) circuit open or short
ATC-112, "Optical Sensor Circuit"
52 Optical sensor (Passenger) circuit open or short
56 Intake sensor circuit short
ATC-114, "Intake Sensor Circuit"
57 Intake sensor circuit open
62 Defroster door motor circuit malfunction
80 CAN bus fault
LAN-3, "Precautions When Using CONSULT-II"
81 BCM CAN message missing
ATC-79, "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
82 Intake door motor (driver) circuit malfunction
MOTOR"
90 Stuck button ATC-116, "REMOVAL"
92 Mode door motor circuit malfunction ATC-63, "Mode Door Motor Circuit"

ATC-56
 TROUBLE DIAGNOSIS

Operational Check EJS006BH

A
The purpose of the operational check is to confirm that the system operates properly.
Conditions : Engine running and at normal operating temperature
CHECKING MEMORY FUNCTION B
1. Set the temperature to 32°C (90°F).
2. Turn blower control dial counterclockwise until system shuts
OFF. C
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
D

MJIB0335E
F
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous tempera-
ture. G

I
MJIB0336E

7. Turn blower control dial counterclockwise until system shuts ATC

OFF.
If NG, go to trouble diagnosis procedure for ATC-104, "Memory
Function" .
If OK, continue with next check. K

MJIB0335E M
CHECKING BLOWER
1. Press the AUTO switch. Blower should operate on low speed.
The blower symbol should have one blade lit (on display).
2. Turn the blower control dial again, and continue checking blower
speed and blower symbol until all speeds are checked.
3. Leave blower on MAX speed.
If NG, go to trouble diagnosis procedure for ATC-82, "DIAGNOSTIC
PROCEDURE FOR BLOWER MOTOR" .
If OK, continue with next check.

MJIB0337E

ATC-57
 TROUBLE DIAGNOSIS

CHECKING DISCHARGE AIR

1. Press MODE switch four times and the DEF switch.
2. Each position indicator should change shape (on display).

MJIB0338E

3. Confirm that discharge air comes out according to the air distri-
bution table. Refer to ATC-30, "Discharge Air Flow" .
Mode door position is checked in the next step.
If NG, go to trouble diagnosis procedure for ATC-63, "Mode Door
Motor Circuit" .
If OK, continue the check.
NOTE:
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at fresh when the DEF or D/F
is selected.
MJIB0284E

CHECKING RECIRCULATION
1. Press recirculation ( ) switch one time. Recirculation indica-
tor should illuminate.
2. Press recirculation ( ) switch one more time. Recirculation
indicator should go off.
3. Listen for intake door position change (blower sound should
change slightly).
If NG, go to trouble diagnosis procedure for ATC-77, "Intake Door
Motor Circuit" .
If OK, continue next check.
NOTE: MJIB0339E
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at fresh when the DEF or D/F is selected.
CHECKING TEMPERATURE DECREASE
1. Rotate temperature control dial (driver side) counterclockwise
until 18°C (60°F) is displayed.
2. Check for cold air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to
trouble diagnosis procedure for ATC-93, "Insufficient Cooling" . If air
mix door motor appears to be malfunctioning, go to ATC-71, "DIAG-
NOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (DRIVER)"
or ATC-73, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)" .
If OK, continue the check.
MJIB0340E

ATC-58
 TROUBLE DIAGNOSIS

CHECKING TEMPERATURE INCREASE

1. Rotate temperature control dial clockwise (driver side) until 32°C A
(90°F) is displayed.
2. Check for hot air at appropriate discharge air outlets.
If NG, listen for sound of air mix door motor operation. If OK, go to B
trouble diagnosis procedure for ATC-100, "Insufficient Heating" . If
air mix door motor appears to be malfunctioning, go to ATC-71,
"DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR C
(DRIVER)" .
If OK, continue with next check.

MJIB0341E
D

CHECK A/C SWITCH

1. Press A/C switch when AUTO switch is ON, or in manual mode.
E
2. A/C switch indicator will turn ON.
● Confirm that the compressor clutch engages (sound or visual
inspection).
F
If NG, go to trouble diagnosis procedure for ATC-87, "Magnet Clutch
Circuit" .
If OK, continue with next check.
G

MJIB0342E
H
CHECKING AUTO MODE
1. Press AUTO switch.
2. Display should indicate AUTO. I
● If ambient temperature is warm, and selected temperature is
cool, confirm that the compressor clutch engages (sound or
visual inspection). (Discharge air and blower speed will ATC
depend on ambient, in-vehicle, and set temperatures.)
If NG, go to trouble diagnosis procedure for ATC-60, "Power Supply
and Ground Circuit for Front Air Control" , then if necessary, trouble K
diagnosis procedure for ATC-87, "Magnet Clutch Circuit" .
If all operational checks are OK (symptom cannot be duplicated), go
to malfunction simulation tests in ATC-35, "How to Perform Trouble MJIB0336E

Diagnosis for Quick and Accurate Repair" and perform tests as out- L
lined to simulate driving conditions environment. If symptom appears, refer to ATC-35, "How to Perform Trou-
ble Diagnosis for Quick and Accurate Repair" , ATC-35, "SYMPTOM TABLE" and perform applicable trouble
diagnosis procedures. M

ATC-59
 TROUBLE DIAGNOSIS

Power Supply and Ground Circuit for Front Air Control EJS006BJ

SYMPTOM: A/C system does not come on.

INSPECTION FLOW

MJIB0343E

*1 ATC-60, "Power Supply and Ground *2 ATC-57, "Operational Check".

Circuit for Front Air Control".

ATC-60
 TROUBLE DIAGNOSIS

COMPONENT DESCRIPTION
Front Air Control A
The front air control has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motors, mode door motor, intake door B
motor, defroster door motor, blower motor and compressor are then
controlled.
The front air control is unitized with control mechanisms. When the C
various switches and temperature dials are operated, data is input to
the front air control.
Self-diagnostic functions are also built into the front air control to pro-
vide quick check of malfunctions in the auto air conditioner system. D
MJIB0327E

Potentio Temperature Control (PTC) E

There are two PTCs (passenger and driver) built into the front air
control. They can be set at an interval of 0.5°C (1.0°F) in the 18°C
(60°F) to 32°C (90°F) temperature range by rotating the temperature
F
dial. The set temperature is displayed.

H
MJIB0344E

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM

SYMPTOM: A/C system does not come on. I

ATC

L
MJIB0180E

ATC-61
 TROUBLE DIAGNOSIS

1. CHECK POWER SUPPLY CIRCUITS FOR FRONT AIR CONTROL

1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Turn ignition switch ON.
4. Check voltage between front air control harness connector M60
terminals 6 and 19, and ground.

Terminals Ignition switch position

(+)
Front air (-) OFF ACC ON
control Terminal No.
connector
WJIA1082E

Battery
M60 6 Approx. 0V Approx. 0V
voltage
Ground
Battery Battery Battery
M60 19
voltage voltage voltage

OK or NG
OK >> GO TO 2.
NG >> Check 10A fuses [Nos. 8 and 19, located in the fuse block (J/B)]. Refer to PG-83 .
● If fuses are OK, check harness for open circuit. Repair or replace as necessary.

● If fuses are NG, replace fuse and check harness for short circuit. Repair or replace as neces-
sary.

2. CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL

1. Turn ignition switch OFF.
2. Check continuity between front air control harness connector
M60 terminal 20 and ground.
20 - Ground : Continuity should exist.
OK or NG
OK >> Replace front air control. Refer to ATC-116, "REMOVAL"
.
NG >> Repair harness or connector.
WJIA1239E

ATC-62
 TROUBLE DIAGNOSIS

Mode Door Motor Circuit EJS006BK

A
SYMPTOM:
● Air outlet does not change.
● Mode door motor does not operate normally. B
INSPECTION FLOW

ATC

MJIB0345E

*1 ATC-30, "Discharge Air Flow". *2 ATC-57, "Operational Check". *3 ATC-55, "A/C System Self-diagnosis
Function".
*4 ATC-56, "SELF-DIAGNOSIS CODE *5 ATC-65, "DIAGNOSTIC PROCE-
CHART". DURE FOR MODE DOOR
MOTOR".

ATC-63
 TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
● Front air control
● Mode door motor
● PBR (built into mode door motor)
● In-vehicle sensor
● Ambient sensor
● Optical sensor
● Intake sensor
System Operation
The mode door position (vent, B/L, foot, and defrost) is set by the front air control by means of the mode door
motor. When a mode door position is selected on the front air control, voltage is applied to one circuit of the
mode door motor while ground is applied to the other circuit, causing the mode door motor to rotate. The direc-
tion of rotation is determined by which circuit has voltage applied to it, and which one has ground applied to it.
The front air control monitors the mode door position by measuring the voltage signal on the PBR circuit.
In AUTO mode the mode door position is set by the front air control which determines the proper position
based on inputs from the in-vehicle sensor, ambient sensor, optical sensor, intake sensor, and the temperature
selected by the driver or passenger.

WJIA1240E

Mode Door Control Specification

WJIA0434E

ATC-64
 TROUBLE DIAGNOSIS

COMPONENT DESCRIPTION
Mode Door Motor A
The mode door motor is attached to the heater & cooling unit. It
rotates so that air is discharged from the outlet as indicated by the
front air control. Motor rotation is conveyed to a link which activates B
the mode door.
NOTE:
This illustration is for LHD models. The layout for RHD models is C
symmetrically opposite.

D
MJIB0161E

DIAGNOSTIC PROCEDURE FOR MODE DOOR MOTOR E

1. CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS
Self-diagnosis code 92 is present. Refer to ATC-55, "A/C System Self-diagnosis Function" . F
YES or NO
YES >> GO TO 2.
NO >> GO TO 3. G

2. CHECK POWER SUPPLY AND GROUND CIRCUITS FOR MODE DOOR MOTOR
1. Turn ignition switch OFF. H
2. Disconnect front air control connector and mode door motor
connector.
3. Check continuity between front air control harness connector I
M60 terminal 1 and mode door motor harness connector M46
terminal 1 and between front air control harness connector M60
terminal 14 and mode door motor harness connector M46 termi- ATC
nal 6.
1-1 : Continuity should exist.
K
14 - 6 : Continuity should exist.
OK or NG
OK >> Replace mode door motor. L
NG >> Repair or replace harness as necessary.

MJIB0204E

ATC-65
 TROUBLE DIAGNOSIS

3. CHECK PBR REFERENCE SIGNAL VOLTAGE

1. Turn ignition switch OFF.
2. Disconnect the mode door motor connector.
3. Turn ignition switch ON.
4. Check voltage between mode door motor harness connector
M46 terminal 3 and ground.
3 - Ground : Approx. 5V
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.

MJIB0205E

4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN MODE DOOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between mode door motor harness connector
M46 terminal 3 and front air control harness connector M60 ter-
minal 23.
3 - 23 : Continuity should exist.
OK or NG
OK >> Replace front air control. Refer to ATC-116, "REMOVAL"
.
NG >> Repair or replace harness as necessary.

MJIB0206E

ATC-66
 TROUBLE DIAGNOSIS

5. CHECK PBR GROUND REFERENCE CIRCUIT A

1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between mode door motor harness connector B
M46 terminal 2 and front air control harness connector M60 ter-
minal 26.
C
2 - 26 : Continuity should exist.
OK or NG
OK >> GO TO 6. D
NG >> Repair or replace harness as necessary.

MJIB0207E
H
6. CHECK PBR FEEDBACK SIGNAL
1. Reconnect the front air control connector and mode door motor I
connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M60 ATC
terminal 21 and ground.
4. Press mode switch through all modes.
K
21 - Ground : Approx. 0 - 5V
OK or NG
OK >> Replace front air control. Refer to ATC-116, "REMOVAL" WJIA1088E L
.
NG >> GO TO 7.

7. CHECK PBR FEEDBACK CIRCUIT M

1. Turn ignition switch OFF.

2. Disconnect the mode door motor connector and front air control
harness connector.
3. Check continuity between mode door motor harness connector
M46 terminal 4 and front air control harness connector M60 ter-
minal 21.
4 - 21 : Continuity should exist.
OK or NG
OK >> Replace mode door motor. Refer to ATC-130, "MODE
WJIA1089E
DOOR MOTOR" .
NG >> Repair or replace harness as necessary.

ATC-67
 TROUBLE DIAGNOSIS

Air Mix Door Motor Circuit EJS006BL

SYMPTOM:
● Discharge air temperature does not change.
● Air mix door motor does not operate.
INSPECTION FLOW

MJIB0346E

*1 ATC-57, "Operational Check". *2 ATC-55, "A/C System Self-diagno- *3 ATC-56, "SELF-DIAGNOSIS CODE
sis Function". CHART".
*4 ATC-71, "DIAGNOSTIC PROCE- *5 ATC-73, "DIAGNOSTIC PROCE-
DURE FOR AIR MIX DOOR DURE FOR AIR MIX DOOR
MOTOR (DRIVER)". MOTOR (PASSENGER)".

ATC-68
 TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts A
Air mix door control system components are:
● Front air control.
B
● Air mix door motors (driver and passenger)
● PBR (built into air mix door motors)
● In-vehicle sensor C
● Ambient sensor
● Optical sensor
● Intake sensor D
System Operation
The front air control receives data from the temperature selected by the driver side and passenger side. The
front air control then applies a voltage to one circuit of the appropriate air mix door motor, while ground is E
applied to the other circuit, causing the appropriate air mix door motor to rotate. The direction of rotation is
determined by which circuit has voltage applied to it, and which one has ground applied to it. The front air con-
trol monitors the air mix door positions by measuring the voltage signal on the PBR circuits of each door. F
In AUTO mode the air mix, intake, mode door, and defrost door positions are set by the front air control which
determines the proper position based on inputs from the in-vehicle sensor, ambient sensor, optical sensor,
intake sensor, and the temperature selected by the driver and front passengers.
Subsequently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new G
door position data is returned to the front air control.

ATC

M
MJIB0330E

Air Mix Door Control Specification

WJIA0435E

ATC-69
 TROUBLE DIAGNOSIS

COMPONENT DESCRIPTION
Air Mix Door Motors
The driver and passenger air mix door motors are attached to the
heater & cooling unit. These motors rotate so that the air mix door is
opened or closed to a position set by the front air control. Motor rota-
tion is then conveyed through a shaft and the air mix door position is
then fed back to the front air control by the PBR built into the air mix
door motors.
NOTE:
The illustrations for air mix door motors (driver and passenger) are
for LHD models. The layout for RHD models is symmetrically oppo-
site.
MJIB0162E

MJIB0163E

ATC-70
 TROUBLE DIAGNOSIS

DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (DRIVER)

A
1. CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS
Self-diagnosis code 22 is present. Refer to ATC-55, "A/C System Self-diagnosis Function" .
YES or NO B
YES >> GO TO 2.
NO >> GO TO 3.
C
2. CHECK POWER SUPPLY CIRCUITS FOR AIR MIX DOOR MOTOR (DRIVER)
1. Turn ignition switch OFF. D
2. Disconnect front air control connector and air mix door motor
(driver) connector.
3. Check continuity between front air control harness connector E
M60 terminal 2 and 3 and air mix door motor (driver) harness
connector M97 terminal 5 and 6.
2-5 : Continuity should exist. F
3-6 : Continuity should exist.
OK or NG
G
OK >> Replace air mix door motor (driver). Refer to ATC-131,
"AIR MIX DOOR MOTOR (DRIVER)" .
NG >> Repair or replace harness as necessary.
H

ATC
MJIB0101E

3. CHECK PBR REFERENCE SIGNAL VOLTAGE K

1. Turn ignition switch OFF.

2. Disconnect the air mix door motor (driver) connector. L
3. Turn ignition switch ON.
4. Check voltage between air mix door motor (driver) harness con-
nector M97 terminal 3 and ground. M
3 - Ground : Approx. 5V
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.

MJIB0102E

ATC-71
 TROUBLE DIAGNOSIS

4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR MOTOR (DRIVER) AND
FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between air mix door motor (driver) harness
connector M97 terminal 3 and front air control harness connec-
tor M60 terminal 23.
3 - 23 : Continuity should exist.
OK or NG
OK >> Replace front air control. Refer to ATC-116, "REMOVAL"
.
NG >> Repair or replace harness as necessary.

MJIB0103E

5. CHECK PBR GROUND REFERENCE CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between air mix door motor (driver) harness
connector M97 terminal 1 and front air control harness connec-
tor M60 terminal 26.
1 - 26 : Continuity should exist.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness as necessary.

MJIB0104E

ATC-72
 TROUBLE DIAGNOSIS

6. CHECK PBR FEEDBACK SIGNAL A

1. Reconnect the front air control connector and air mix door motor
(driver) connector.
2. Turn ignition switch ON. B
3. Check voltage between front air control harness connector M60
terminal 22 and ground.
4. Rotate driver temperature control dial through complete range. C

22 - Ground : Approx. 0V - 5V
OK or NG D
OK >> Replace front air control. Refer to ATC-116, "REMOVAL" WJIA1096E
.
NG >> GO TO 7. E
7. CHECK PBR FEEDBACK CIRCUIT
1. Turn ignition switch OFF. F
2. Disconnect the air mix door motor (driver) connector and front
air control connector.
3. Check continuity between air mix door motor (driver) harness G
connector M97 terminal 2 and front air control harness connec-
tor M60 terminal 22.
H
2 - 22 Continuity should exist.
OK or NG
OK >> Replace air mix door motor (driver). Refer to ATC-131, I
WJIA1248E
"AIR MIX DOOR MOTOR (DRIVER)" .
NG >> Repair or replace harness as necessary.
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (PASSENGER) ATC
1. CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS
Self-diagnosis code 12 is present. Refer to ATC-55, "A/C System Self-diagnosis Function" . K
YES or NO
YES >> GO TO 2.
NO >> GO TO 3. L

ATC-73
 TROUBLE DIAGNOSIS

2. CHECK POWER SUPPLY CIRCUIT FOR AIR MIX DOOR MOTOR (PASSENGER)
1. Turn ignition switch OFF.
2. Disconnect front air control connector and air mix door motor
(passenger) connector.
3. Check continuity between front air control harness connector
M60 terminal 15 and 16 and air mix door motor (passenger) har-
ness connector M100 terminal 6 and 5.
15 - 6 Continuity should exist.
16 - 5 Continuity should exist.
OK or NG
OK >> Replace air mix door motor (passenger). Refer to ATC-
131, "AIR MIX DOOR MOTOR (PASSENGER)" .
NG >> Repair or replace harness as necessary.

MJIB0059E

3. CHECK PBR REFERENCE SIGNAL VOLTAGE

1. Turn ignition switch OFF.
2. Disconnect the air mix door motor (passenger) connector.
3. Turn ignition switch ON.
4. Check voltage between air mix door motor (passenger) harness
connector M100 terminal 1 and ground.
1 - Ground : Approx. 5V
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.

MJIB0060E

ATC-74
 TROUBLE DIAGNOSIS

4. CHECK PBR REFERENCE VOLTAGE CIRCUIT BETWEEN AIR MIX DOOR (PASSENGER) AND A
FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect the front air control connector. B
3. Check continuity between air mix door motor (passenger) har-
ness connector M100 terminal 1 and front air control harness
connector M60 terminal 23. C
1 - 23 Continuity should exist.
OK or NG D
OK >> Replace front air control. Refer toATC-116, "REMOVAL"
.
NG >> Repair or replace harness as necessary.
E

H
MJIB0061E

5. CHECK PBR GROUND REFERENCE CIRCUIT

I
1. Turn ignition switch OFF.
2. Disconnect the front air control connector.
3. Check continuity between air mix door motor (passenger) har- ATC
ness connector M100 terminal 3 and front air control harness
connector M60 terminal 26.
3 - 26 Continuity should exist. K

OK or NG
OK >> GO TO 6. L
NG >> Repair or replace harness as necessary.

MJIB0062E

ATC-75
 TROUBLE DIAGNOSIS

6. CHECK PBR FEEDBACK SIGNAL

1. Reconnect the front air control connector and air mix door motor
(passenger) connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M61
terminal 36 and ground.
4. Rotate passenger temperature control dial through complete
range.
36 - Ground : Approx. 0 - 5V
OK or NG
WJIA1249E
OK >> Replace front air control. Refer toATC-116, "REMOVAL"
.
NG >> GO TO 7.

7. CHECK PBR FEEDBACK CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect the air mix door motor (passenger) connector and
front air control connector.
3. Check continuity between air mix door motor (passenger) har-
ness connector M100 terminal 2 and front air control harness
connector M61 terminal 36.
2 - 36 : Continuity should exist.
OK or NG
OK >> Replace air mix door motor (passenger). Refer to ATC-
MJIB0063E
131, "AIR MIX DOOR MOTOR (PASSENGER)" .
NG >> Repair or replace harness as necessary.

ATC-76
 TROUBLE DIAGNOSIS

Intake Door Motor Circuit EJS006BM

A
SYMPTOM:
● Intake door does not change.
● Intake door motor does not operate normally. B
INSPECTION FLOW

ATC

MJIB0347E

*1 ATC-57, "Operational Check". *2 ATC-55, "A/C System Self-diagno- *3 ATC-56, "SELF-DIAGNOSIS CODE
sis Function". CHART".

ATC-77
 TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
● Front air control
● Intake door motor
● In-vehicle sensor
● Ambient sensor
● Optical sensor
● Intake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and
recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the
opposite direction, again allowing fresh air into the cabin.
In the AUTO mode, the front air control determines the intake door position based on the ambient tempera-
ture, the intake air temperature and the in-vehicle temperature. When the DEFROST, or OFF switches are
pushed or A/C switch is OFF, the front air control sets the intake door at the fresh position.

WJIA0551E

Intake Door Control Specification

WJIA0436E

ATC-78
 TROUBLE DIAGNOSIS

COMPONENT DESCRIPTION
Intake door motor A
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the front air control. Motor rotation is
conveyed to a lever which activates the intake door. B
NOTE:
This illustration is for LHD models. The layout for RHD models is
symmetrically opposite. C

D
MJIB0165E

DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR E

1. CHECK RESULT FROM FRONT AIR CONTROL SELF-DIAGNOSIS
Self-diagnosis code 82 is present. Refer to ATC-55, "A/C System Self-diagnosis Function" . F
YES or NO
YES >> GO TO 2.
NO >> Replace front air control. Refer to ATC-116, "REMOVAL" . G

2. CHECK POWER SUPPLY CIRCUIT FOR INTAKE DOOR MOTOR

1. Turn ignition switch OFF. H
2. Disconnect front air control connector and intake door motor
connector.
3. Check continuity between front air control harness connector I
M60 terminal 5 and intake door motor harness connector M86
terminal 6 and between front air control harness connector M60
terminal 4 and intake door motor harness connector M86 termi- ATC
nal 1.
5-6 Continuity should exist.
K
4-1 Continuity should exist.
OK or NG
OK >> Replace intake door motor. Refer to ATC-129, "INTAKE L
DOOR MOTOR" .
NG >> Repair or replace harness as necessary.
M

MJIB0208E

ATC-79
 TROUBLE DIAGNOSIS

Blower Motor Circuit EJS006BN

SYMPTOM:
● Blower motor operation is malfunctioning.
● Blower motor operation is malfunctioning under cold starting conditions.
INSPECTION FLOW

MJIB0331E

*1 ATC-57, "Operational Check". *2 ATC-55, "A/C System Self-diagnosis *3 ATC-56, "SELF-DIAGNOSIS CODE
Function". CHART".
*4 ATC-82, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR".

ATC-80
 TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts A
Blower speed control system components are:
● Front air control
B
● In-vehicle sensor
● Ambient sensor
● Optical sensor C
● Intake sensor
System Operation
D

WJIA1252E

Automatic Mode ATC

In the automatic mode, the blower motor speed is calculated by the front air control and variable blower control
based on input from the in-vehicle sensor, optical sensor, intake sensor and ambient sensor, and potentio tem-
perature control (PTC). K
When the air flow is increased, the blower motor speed is adjusted gradually. to prevent a sudden increase in
air flow.
In addition to manual air flow control and the usual automatic air flow control, starting air flow control, low
L
water temperature starting control and high passenger compartment temperature starting control are avail-
able.
Starting Blower Speed Control M
Start up from cold soak condition (Automatic mode).
In a cold start up condition where the engine coolant temperature is below 50°C (122°F), the blower will not
operate at blower speed 1 for a short period of time (up to 210 seconds). The exact start delay time varies
depending on the ambient and engine coolant temperatures.
In the most extreme case (very low ambient temperature) the blower starting delay will be 210 seconds as
described above. After the coolant temperature reaches 50°C (122°F), or the 210 seconds has elapsed, the
blower speed will increase to the objective blower speed.

Start up from usual operating or hot soak condition (Automatic mode).

The blower will begin operation momentarily after the AUTO switch is pushed. The blower speed will gradually
rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).

ATC-81
 TROUBLE DIAGNOSIS

Blower Speed Compensation - Sunload

When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low
speed. The speed will vary depending on the sunload. During conditions of low or no sunload, the blower
operates at low speed. During high sunload conditions, the front air control causes the blower speed to
increase.
Blower Speed Control Specification

WJIA0441E

COMPONENT DESCRIPTION
Variable Blower Control
The variable blower control is located on the cooling unit. The vari-
able blower control receives a gate voltage from the front air control
to steplessly maintain the blower motor voltage in the 0 to 5 volt
range (approx.).
NOTE:
This illustration is for LHD models. The layout for RHD models is
symmetrically opposite.

MJIB0166E

DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR

SYMPTOM: Blower motor operation is malfunctioning under starting
blower speed control.

MJIB0064E

ATC-82
 TROUBLE DIAGNOSIS

1. CHECK FUSES A
Check 15A fuses [No. 24 and 27, (located in the fuse and fusible link box)]. For fuse layout, refer to PG-84,
"FUSE AND FUSIBLE LINK BOX" .
Fuses are good. B

OK or NG
OK >> GO TO 2.
C
NG >> GO TO 10.

2. CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT

D
1. Turn ignition switch OFF.
2. Disconnect blower motor connector.
3. Turn ignition switch ON. E
4. Turn the blower control dial to select any mode except off.
5. Check voltage between blower motor harness connector M94
terminal 2 and ground. F

2 - Ground : Battery voltage.

OK or NG G
OK >> GO TO 12. MJIB0065E

NG >> GO TO 3.
H
3. CHECK BLOWER MOTOR RELAY (SWITCH SIDE) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect blower motor relay. I
3. Check voltage between blower motor relay harness connector
E28 terminals 3 and 6 and ground.
ATC
3, 6 - Ground : Battery voltage.
OK or NG
OK >> GO TO 4. K
NG >> Repair harness or connector.
MJIB0066E
L
4. CHECK BLOWER MOTOR RELAY
Refer to ATC-86, "Blower Motor Relay" . M
OK or NG
OK >> GO TO 5.
NG >> Replace blower motor relay.

5. CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN

1. Turn ignition switch OFF.
2. Disconnect blower motor relay connector and blower motor con-
nector.
3. Check continuity between blower motor relay harness connector
E28 terminals 5 and 7 and blower motor harness connector M94
terminal 2.
5, 7 - 2 : Continuity should exist.
OK or NG
OK >> GO TO 6.
MJIB0067E
NG >> Repair harness or connector.

ATC-83
 TROUBLE DIAGNOSIS

6. CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN

1. Disconnect variable blower control harness connector.
2. Check continuity between blower motor relay harness connector
E28 terminals 5 and 7 and variable blower control harness con-
nector M96 terminal 1.
5, 7 - 1 : Continuity should exist.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
MJIB0068E

7. CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT

1. Disconnect front air control connector.
2. Check continuity between front air control harness connector
M61 terminal 32 and variable blower control harness connector
M96 terminal 2.
32 - 2 : Continuity should exist.
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
WJIA1263E

8. CHECK BLOWER MOTOR RELAY (COIL SIDE) POWER SUPPLY

1. Turn ignition switch ON.
2. Check voltage between blower motor relay connector E28 termi-
nal 1 and ground.
1 - Ground : Battery voltage.
OK or NG
OK >> GO TO 9.
NG >> Repair harness or connector.

LJIA0080E

9. CHECK BLOWER MOTOR RELAY (COIL SIDE) GROUND CIRCUIT

1. Turn ignition switch OFF.
2. Check continuity between blower motor relay connector E28 ter-
minal 2 and air control harness connector M61 terminal 38.
2 - 38 : Continuity should exist.
OK or NG
OK >> Replace front air control. Refer to ATC-116, "REMOVAL"
.
NG >> Repair harness or connector.
WJIA1115E

ATC-84
 TROUBLE DIAGNOSIS

10. REPLACE FUSES A

1. Replace fuses.
2. Activate the blower motor.
3. Do fuses blow? B
YES or NO
YES >> GO TO 11.
NO >> Inspection End. C

11. CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT FOR SHORT

D
1. Turn ignition switch OFF.
2. Disconnect blower motor connector and variable blower control
connector. E
3. Check continuity between variable blower control harness con-
nector M96 terminal 1 and ground.
1 - Ground : Continuity should not exist. F
OK or NG
OK >> GO TO 12.
NG >> Repair harness or connector. G
WJIA1264E

12. CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT H

1. Disconnect front air control connector.
2. Check continuity between front air control harness connector
M61 terminal 32 and variable blower control harness connector I
M96 terminal 2.
32 - 2 : Continuity should exist.
ATC
OK or NG
OK >> Check blower motor. If OK, replace variable blower con-
trol. Refer to ATC-121, "REMOVAL" . K
NG >> Repair harness or connector.
WJIA1263E

ATC-85
 TROUBLE DIAGNOSIS

COMPONENT INSPECTION
Blower Motor Relay
Check continuity between terminals by supplying 12 volts and
ground to coil side terminals of relay.

LJIA0068E

Blower Motor
Confirm smooth rotation of the blower motor.
● Ensure that there are no foreign particles inside the blower unit.
● Apply 12 volts to terminal + and ground to terminal - and verify
that the motor operates freely and quietly.

WJIA1265E

ATC-86
 TROUBLE DIAGNOSIS

Magnet Clutch Circuit EJS006BQ

A
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
B

ATC

MJIB0348E

*1 ATC-57, "Operational Check". *2 ATC-55, "A/C System Self-diagnosis *3 ATC-56, "SELF-DIAGNOSIS CODE
Function". CHART".
*4 ATC-105, "Ambient Sensor Circuit". *5 ATC-114, "Intake Sensor Circuit".

ATC-87
 TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
The front air control controls compressor operation based on ambient and intake temperature and a signal
from ECM.
Low Temperature Protection Control
The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor and the ambient sensor.
When intake air temperature is higher than the preset value, the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than the preset value. That preset value is dependent on the ambi-
ent temperature, refer to the following table.
Compressor ON Compressor OFF
Ambient temperature °C (°F)
intake temperature °C (°F) intake temperature °C (°F)
0 (32) 5.5 (42) 5.0 (41)
10 (50) 4.5 (40) 4.5 (40)
20 (68) 2.5 (37) 2.0 (36)
30 (86) 2.0 (36) 1.5 (35)
40 (104) 2.0 (36) 1.5 (35)
50 (122) 2.0 (36) 1.5 (35)

DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH

SYMPTOM: Magnet clutch does not engage when A/C switch is ON.

MJIB0328E

1. CHECK INTAKE AND AMBIENT SENSOR CIRCUITS

Check intake and ambient sensors. Refer to ATC-55, "A/C System Self-diagnosis Function" .
OK or NG
OK >> GO TO 2.
NG >> ● Malfunctioning intake sensor. Refer to ATC-114, "Intake Sensor Circuit" .
● Malfunctioning ambient sensor. Refer to ATC-105, "Ambient Sensor Circuit" .

ATC-88
 TROUBLE DIAGNOSIS

2. PERFORM AUTO ACTIVE TEST A

Refer to PG-19, "Auto Active Test" .
Does magnet clutch operate?
YES or NO B
YES >> ● WITH CONSULT-II
GO TO 5.
● WITHOUT CONSULT-II C
GO TO 6.
NO >> Check 10A fuse (No. 42, located in IPDM E/R), and GO TO 3.
D
3. CHECK CIRCUIT CONTINUITY BETWEEN IPDM E/R AND COMPRESSOR
1. Turn ignition switch OFF.
E
2. Disconnect IPDM E/R connector and compressor (magnet
clutch) connector.
3. Check continuity between IPDM E/R harness connector E12 ter-
F
minal 11 and compressor harness connector F20 terminal 1.
11 – 1 : Continuity should exist.
OK or NG G
OK >> GO TO 4.
NG >> Repair harness or connector.
WJIA0560E
H
4. CHECK MAGNET CLUTCH CIRCUIT
Check for operation sound when applying battery voltage direct cur- I
rent to terminal.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-26, "Removal and ATC
Installation of IPDM E/R" .
NG >> Replace magnet clutch. Refer to BCS-17, "Removal and
Installation of BCM" . K

SJIA0197E L

5. CHECK BCM INPUT (COMPRESSOR ON) SIGNAL

Check compressor ON/OFF signal. Refer to ATC-33, "CONSULT-II M
Function (BCM)" .
A/C SW ON : COMP ON SIG ON
A/C SW OFF : COMP ON SIG OFF
OK or NG
OK >> GO TO 8.
NG >> GO TO 6.

WJIA0469E

ATC-89
 TROUBLE DIAGNOSIS

6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL

1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M42 terminal
27 and front air control harness connector M60 terminal 10.
27 - 10 Continuity should exist.
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
MJIB0070E

7. CHECK VOLTAGE FOR FRONT AIR CONTROL (COMPRESSOR ON SIGNAL)

1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M60
terminal 10 and ground.

Terminals
(+)
Voltage
Condition
Front air (-) (Approx.)
control con- Terminal No.
nector
WJIA1137E

A/C switch: ON 0V
M60 10 Ground
A/C switch: OFF 5V

OK or NG
OK >> GO TO 8.
NG-1 >> If the voltage is approx. 5V when A/C switch is ON, replace front air control. Refer to ATC-116,
"REMOVAL" .
NG-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to BCS-17, "Removal
and Installation of BCM" .

ATC-90
 TROUBLE DIAGNOSIS

8. CHECK REFRIGERANT PRESSURE SENSOR A

WITH CONSULT-II
1. Start engine.
B
2. Check voltage of refrigerant pressure sensor. Refer to ATC-33, "CONSULT-II Function (BCM)" .
WITHOUT CONSULT-II
1. Start engine. C
2. Check voltage between ECM harness connector F1 terminal 53
and ground.
Terminals D
(+) Voltage
Condition
(-) (Approx.)
ECM con-
nector
Terminal No. E

F1 53 Ground A/C switch: ON 0.36 - 3.88V

OK or NG F
OK >> ● WITH CONSULT-II MJIB0071E

GO TO 9.
● WITHOUT CONSULT-II G
GO TO 10.
NG >> Refer to EC-325, "REFRIGERANT PRESSURE SENSOR" .
H
9. CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to ATC-33, "CONSULT-II Function
(BCM)" . I
FRONT BLOWER CONTROL : FAN ON SIG ON
DIAL ON
ATC
FRONT BLOWER CONTROL : FAN ON SIG OFF
DIAL OFF
OK or NG K
OK >> GO TO 12.
NG >> GO TO 10.
WJIA0469E
L
10. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF. M
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M42 terminal
26 and front air control harness connector M61 terminal 35.
26 - 35 Continuity should exist.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
MJIB0072E

ATC-91
 TROUBLE DIAGNOSIS

11. CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)

1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M61
terminal 35 and ground.

Terminals
(+) Voltage
Condition
(-) (Approx.)
Front air con-
Terminal No.
trol connector
A/C switch: ON WJIA1139E

Blower motor 0V
M61 35 Ground operates
A/C switch: OFF 5V

OK or NG
OK >> GO TO 12.
NG-1 >> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer to ATC-116,
"REMOVAL" .
NG-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer to BCS-17, "Removal
and Installation of BCM" .

12. CHECK SELF-DIAGNOSTIC RESULT

Perform self-diagnosis. Refer to ATC-55, "A/C System Self-diagnosis Function"
OK or NG
OK >> Inspection End.
NG >> Refer to ATC-56, "SELF-DIAGNOSIS CODE CHART" .
COMPONENT INSPECTION
Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the condenser.

MJIB0167E

ATC-92
 TROUBLE DIAGNOSIS

Insufficient Cooling EJS006BR

A
SYMPTOM: Insufficient cooling
INSPECTION FLOW
B

ATC

MJIB0349E

*1 ATC-57, "Operational Check". *2 ATC-55, "A/C System Self-diagno- *3 ATC-56, "SELF-DIAGNOSIS CODE
sis Function". CHART".
*4 EC-18, "SYSTEM DESCRIPTION" . *5 ATC-4, "Contaminated Refrigerant". *6 ATC-94, "PERFORMANCE TEST
DIAGNOSES".
*7 ATC-96, "Test Reading". *8 EM-12, "Checking Drive Belts".

ATC-93
 TROUBLE DIAGNOSIS

PERFORMANCE TEST DIAGNOSES

RJIA1601E

*1 ATC-96, "PERFORMANCE *2 ATC-96, "PERFORMANCE *3 ATC-97, "Trouble Diagnoses for

CHART". CHART". Unusual Pressure".
*4 ATC-68, "Air Mix Door Motor Circuit".

ATC-94
 TROUBLE DIAGNOSIS

ATC

RJIA3107E

*1 ATC-143, "Removal and Installation *2 ATC-80, "Blower Motor Circuit". *3 EM-12, "Checking Drive Belts".
for Compressor Clutch".

ATC-95
 TROUBLE DIAGNOSIS

PERFORMANCE CHART
Test Condition
Testing must be performed as follows:
Vehicle location Indoors or in the shade (in a well-ventilated place)
Doors Closed
Door window Open
Hood Open
TEMP. Max. COLD
Mode switch (Ventilation) set
Recirculation (REC) switch (Recirculation) set

Blower speed Max. speed set

Engine speed Idle speed
Operate the air conditioning system for 10 minutes before taking measurements.

Test Reading
Recirculating-to-discharge Air Temperature Table
Inside air (Recirculating air) at blower assembly inlet
Discharge air temperature at center ventilator
Relative humidity Air temperature °C (°F)
% °C (°F)
20 (68) 9.6 - 12.0 (49 - 54)
25 (77) 13.6 - 16.5 (56 - 62)
40 - 60
30 (86) 18.0 - 21.4 (64 - 71)
35 (95) 22.8 - 26.7 (73 - 80)
20 (68) 12.0 - 14.3 (54 - 58)
25 (77) 16.5 - 19.3 (62 - 67)
60 - 80
30 (86) 21.4 - 24.8 (71 - 77)
35 (95) 26.7 - 30.5 (80 - 87)

Ambient Air Temperature-to-operating Pressure Table

Ambient air
High-pressure (Discharge side) Low-pressure (Suction side)
Relative humidity Air temperature kPa (kg/cm2 , psi) kPa (kg/cm2 , psi)
% °C (°F)
1,090 - 1,210 220 - 240
20 (68)
(11.11 - 12.33, 158.0 - 175.4) (2.24 - 2.45, 31.9 - 34.8)
1,370 - 1,520 280 - 310
25 (77)
(13.97 - 15.49, 198.6 - 220.3) (2.85 - 3.16, 40.6 - 44.9)
40 - 60
1,610 - 1,790 330 - 370
30 (86)
(16.41 - 18.25, 233.4 - 259.5) (3.36 - 3.77, 47.8 - 53.6)
1,940 - 2,150 390 - 430
35 (95)
(19.78 - 21.92, 281.2 - 311.7) (3.98 - 4.38, 56.5 - 62.3)
1,210 - 1,330 240 - 260
20 (68)
(12.33 - 13.56, 175.4 - 192.8) (2.45 - 2.65, 34.8 - 37.7)
1,520 - 1,670 310 - 340
25 (77)
(15.49 - 17.02, 220.3 - 242.1) (3.16 - 3.47, 44.9 - 49.3)
60 - 80
1,790 - 1,970 370 - 410
30 (86)
(18.25 - 20.08, 259.5 - 285.6) (3.77 - 4.18, 53.6 - 59.4)
2,150 - 2,370 430 - 470
35 (95)
(21.92 - 24.16, 311.7 - 343.5) (4.38 - 4.79, 62.3 - 68.1)

ATC-96
 TROUBLE DIAGNOSIS

TROUBLE DIAGNOSES FOR UNUSUAL PRESSURE

Whenever system′s high and/or low side pressure is unusual, diagnose using a manifold gauge. The marker A
above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the stan-
dard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air temperature-
to-operating pressure table). B
Both High- and Low-pressure Sides are Too High
Gauge indication Refrigerant cycle Probable cause Corrective action
C
Pressure is reduced soon
Excessive refrigerant charge Reduce refrigerant until speci-
after water is splashed on
in refrigeration cycle fied pressure is obtained.
condenser.
Insufficient condenser cooling
D
performance
↓ ● Clean condenser.
Air suction by cooling fan is
insufficient. 1. Condenser fins are clogged. ● Check and repair cooling fan E
if necessary.
2. Improper fan rotation of
cooling fan
● Low-pressure pipe is not F
Both high- and low-pressure sides cold. Poor heat exchange in con-
are too high. ● When compressor is denser
stopped high-pressure (After compressor operation
Evacuate repeatedly and G
value quickly drops by stops, high-pressure
recharge system.
approximately 196 kPa (2 decreases too slowly.)
kg/cm2 , 28 psi). It then ↓
decreases gradually there- Air in refrigeration cycle H
after.
AC359A
Engine cooling systems mal- Check and repair engine cool-
Engine tends to overheat.
function. ing system. I
● Excessive liquid refrigerant
on low-pressure side
● An area of the low-pres- ● Excessive refrigerant dis- ATC
sure pipe is colder than charge flow
areas near the evaporator ● Expansion valve is open a
outlet. Replace expansion valve.
little compared with the
K
● Plates are sometimes cov- specification.
ered with frost. ↓
Improper expansion valve
adjustment L

High-pressure Side is Too High and Low-pressure Side is Too Low

Gauge indication Refrigerant cycle Probable cause Corrective action M
High-pressure side is too high and
low-pressure side is too low.

Upper side of condenser and High-pressure tube or parts ● Check and repair or replace
high-pressure side are hot, located between compressor malfunctioning parts.
however, liquid tank is not so and condenser are clogged or ● Check lubricant for contami-
hot. crushed. nation.

AC360A

ATC-97
 TROUBLE DIAGNOSIS

High-pressure Side is Too Low and Low-pressure Side is Too High

Gauge indication Refrigerant cycle Probable cause Corrective action
Compressor pressure opera-
High-pressure side is too low and
High- and low-pressure sides tion is improper.
low-pressure side is too high.
become equal soon after com- ↓ Replace compressor.
pressor operation stops. Damaged inside compressor
packings.
Compressor pressure opera-
No temperature difference tion is improper.
between high- and low-pres- ↓ Replace compressor.
sure sides. Damaged inside compressor
AC356A
packings.

Both High- and Low-pressure Sides are Too Low

Gauge indication Refrigerant cycle Probable cause Corrective action
● There is a big temperature
difference between liquit
tand outlet and inlet. Outlet ● Replace liquid tank.
temperature is extremely Liquid tank inside is slightly
clogged. ● Check lubricant for contami-
low. nation.
● Liquid tank inlet and expan-
sion valve are frosted.
● Temperature of expansion
valve inlet is extremely low
as compared with areas
near liquid tank. ● Check and repair malfunc-
High-pressure pipe located tioning parts.
● Expansion valve inlet may between liquit tank and expan-
be frosted. sion valve is clogged. ● Check lubricant for contami-
nation.
● Temperature difference
occurs somewhere in high-
pressure side.
Low refrigerant charge. Check refrigerant system for
Expansion valve and liquid
Both high- and low-pressure sides ↓ leaks. Refer to ATC-150,
tank are warm or only cool
are too low. Leaking fittings or compo- "Checking for Refrigerant
when touched.
nents. Leaks" .
Expansion valve closes a little
compared with the specifica-
tion.
↓ ● Remove foreign particles by
There is a big temperature dif-
ference between expansion 1. Improper expansion valve using compressed air.
AC353A
valve inlet and outlet while the adjustment. ● Check lubricant for contami-
valve itself is frosted. 2. Malfunctioning expansion nation.
valve.
3. Outlet and inlet may be
clogged.
● Check and repair malfunc-
An area of the low-pressure tioning parts.
Low-pressure pipe is clogged
pipe is colder than areas near
or crushed. ● Check lubricant for contami-
the evaporator outlet.
nation.
● Check intake sensor circuit.
Refer to ATC-114, "Intake
Sensor Circuit" .
● Replace compressor.
Air flow volume is too low. Evaporator is frozen.
● Repair evaporator fins.
● Replace evaporator.
● Refer to ATC-80, "Blower
Motor Circuit" .

ATC-98
 TROUBLE DIAGNOSIS

Low-pressure Side Sometimes Becomes Negative

Gauge indication Refrigerant cycle Probable cause Corrective action
A

Low-pressure side sometimes

● Air conditioning system Refrigerant does not dis-
becomes negative.
does not function and does charge cyclically. B
not cyclically cool the com- ↓ ● Drain water from refrigerant
partment air. Moisture is frozen at expan- or replace refrigerant.
● The system constantly func- sion valve outlet and inlet.
↓ ● Replace liquid tank. C
tions for a certain period of
time after compressor is Water is mixed with refriger-
stopped and restarted. ant.
AC354A
D
Low-pressure Side Becomes Negative
Gauge indication Refrigerant cycle Probable cause Corrective action
Leave the system at rest until E
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.
F
● If water is the cause, initially
cooling is okay. Then the
water freezes causing a G
Low-pressure side becomes nega-
blockage. Drain water from
tive.
refrigerant or replace refrig-
High-pressure side is closed
erant.
Liquid tank or front/rear side of and refrigerant does not flow. H
expansion valve′s pipe is ↓ ● If due to foreign particles,
frosted or dewed. Expansion valve or liquid tank remove expansion valve
is frosted. and remove the particles
with dry and compressed air I
AC362A
(not shop air).
● If either of the above meth-
ods cannot correct the mal- ATC
function, replace expansion
valve.
● Replace liquid tank.
K
● Check lubricant for contami-
nation.

ATC-99
 TROUBLE DIAGNOSIS

Insufficient Heating EJS006BS

SYMPTOM: Insufficient heating

INSPECTION FLOW

MJIB0350E

*1 ATC-57, "Operational Check". *2 ATC-68, "Air Mix Door Motor Circuit". *3 ATC-55, "A/C System Self-diagno-
sis Function".
*4 ATC-55, "A/C System Self-diagnosis *5 ATC-80, "Blower Motor Circuit". *6 EC-103, "DTC P0117, P0118 ECT
Function". SENSOR".
*7 CO-7, "Changing Engine Coolant". *8 CO-13, "Checking Reservoir Tank
Cap".

ATC-100
 TROUBLE DIAGNOSIS

Noise EJS006BT

A
SYMPTOM: Noise
INSPECTION FLOW
B

ATC

WJIA0473E

ATC-101
 TROUBLE DIAGNOSIS

*1 ATC-143, "REMOVAL". *2 ATC-144, "INSTALLATION". *3 ATC-24, "Maintenance of Lubricant

Quantity in Compressor".
*4 ATC-57, "Operational Check". *5 EM-12, "Checking Drive Belts".

ATC-102
 TROUBLE DIAGNOSIS

Self-diagnosis EJS006BU

A
SYMPTOM: Self-diagnosis cannot be performed.
INSPECTION FLOW
B

ATC

K
MJIB0351E

*1 ATC-60, "Power Supply and Ground *2 ATC-105, "Ambient Sensor Circuit". *3 ATC-108, "In-vehicle Sensor Circuit".
Circuit for Front Air Control".
L
*4 ATC-112, "Optical Sensor Circuit". *5 ATC-114, "Intake Sensor Circuit". *6 ATC-68, "Air Mix Door Motor Circuit".
*7 ATC-57, "Operational Check". *8 ATC-35, "SYMPTOM TABLE".

ATC-103
 TROUBLE DIAGNOSIS

Memory Function EJS006BV

SYMPTOM: Memory function does not operate.

INSPECTION FLOW

MJIB0332E

*1 ATC-60, "Power Supply and Ground *2 ATC-57, "Operational Check". *3 ATC-55, "A/C System Self-diagnosis
Circuit for Front Air Control". Function".

ATC-104
 TROUBLE DIAGNOSIS

Ambient Sensor Circuit EJS006BW

COMPONENT DESCRIPTION A
Ambient Sensor
Ambient sensor is attached to the radiator core support (left side). It
detects ambient temperature and converts it into a resistance value B
which is then input into the front air control.

MJIB0168E
E
AMBIENT TEMPERATURE INPUT PROCESS
The front air control includes a processing circuit for ambient sensor input. However, when the temperature
detected by ambient sensor increases quickly, the processing circuit retards the front air control function. It F
only allows the front air control to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 sec-
onds.
This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving.
Although the actual ambient temperature has not changed, the temperature detected by ambient sensor will G
increase. This is because the heat from the engine compartment can radiate to the front grille area, location of
ambient sensor .
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR H
SYMPTOM: Ambient sensor circuit is open or shorted. (40 or 41 is
indicated on front air control as a result of conducting the front air
control self-diagnosis) I

ATC

K
MJIB0090E

L
1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
1. Disconnect ambient sensor connector.
M
2. Turn ignition switch ON.
3. Check voltage between ambient sensor harness connector E48
terminal 4 and ground.
4 - Ground : Approx. 5V
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
MJIB0091E

ATC-105
 TROUBLE DIAGNOSIS

2. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E48 terminal 3 and front air control harness connector M60 ter-
minal 13.
3 - 13 : Continuity should exist.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
MJIB0092E

3. CHECK AMBIENT SENSOR

Refer to ATC-107, "Ambient Sensor" .
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.
NG >> 1. Replace ambient sensor.
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.

4. CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E48 terminal 4 and front air control harness connector M61 ter-
minal 28.
4 - 28 : Continuity should exist.
4. Check continuity between ambient sensor harness connector
E48 terminal 4 and ground.
4 - Ground : Continuity should not exist. MJIB0093E

OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.
NG >> Repair harness or connector.

ATC-106
 TROUBLE DIAGNOSIS

COMPONENT INSPECTION
Ambient Sensor A
After disconnecting ambient sensor connector, measure resistance
between terminals 1 and 2 at sensor component side, using the table
below. B

Temperature °C (°F) Resistance kΩ

0 (32) 9.39 C
20 (68) 3.51
35 (95) 1.80
40 (104) 1.46 D

If NG, replace ambient sensor .

E

MJIB0169E H

ATC

ATC-107
 TROUBLE DIAGNOSIS

In-vehicle Sensor Circuit EJS006BX

COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor is located on instrument lower driver panel. It
converts variations in temperature of passenger compartment air
(drawn in through the integrated fan) into a resistance value. It is
then input into the front air control.

MJIB0352E

WJIA0606E

ATC-108
 TROUBLE DIAGNOSIS

DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR

SYMPTOM: In-vehicle sensor circuit is open or shorted. (44 or 46 is A
indicated on front air control as a result of conducting self-diagnosis.)

WJIA1146E
D

1. CHECK IN-VEHICLE SENSOR CIRCUIT

Are diagnostic codes 44 or 46 present? E
YES or NO
YES >> GO TO 6.
NO >> GO TO 2. F

2. CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND

G
1. Turn ignition switch OFF.
2. Disconnect in-vehicle sensor connector.
3. Turn ignition switch ON. H
4. Check voltage between in-vehicle sensor harness connector
M50 terminal 4 and ground.
4 - Ground : Approx. 5V. I

OK or NG
OK >> GO TO 3. ATC
NG >> GO TO 5.
LJIA0089E

3. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL K

1. Turn ignition switch OFF.

2. Disconnect front air control connector M60. L
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 1 and front air control harness connector M60 ter-
minal 13. M
1 - 13 : Continuity should exist.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
WJIA1147E

4. CHECK IN-VEHICLE SENSOR

Refer to ATC-111, "In-vehicle Sensor" .
OK or NG
OK >> 1. Replace front air control.
2. Go to ATC-55, "A/C System Self-diagnosis Function" and perform self-diagnosis.
NG >> 1. Replace in-vehicle sensor.
2. Go to ATC-55, "A/C System Self-diagnosis Function" and perform self-diagnosis.

ATC-109
 TROUBLE DIAGNOSIS

5. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 4 and front air control harness connector M61 ter-
minal 27.
4 - 27 : Continuity should exist.
4. Check continuity between in-vehicle sensor harness connector
M50 terminal 4 and ground.
4 - Ground : Continuity should not exist. WJIA1148E

OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.
NG >> Repair harness or connector.

6. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR MOTOR AND FRONT AIR CON-
TROL (SELF-DIAGNOSIS CODES 44 OR 46)
1. Turn ignition switch OFF.
2. Disconnect front air control connector and in-vehicle sensor con-
nector.
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 2 and 3 and front air control harness connector
M61 terminal 34 and 33.
2 - 34 : Continuity should exist.
3 - 33 : Continuity should exist.
4. Check continuity between in-vehicle sensor harness connector WJIA1149E
M50 terminal 2 and 3 and ground.
2, 3 - Ground : Continuity should not exist.
OK or NG
OK >> 1. Replace front air control.
2. Go to ATC-55, "A/C System Self-diagnosis Function" and perform self-diagnosis.
NG >> Repair harness or connector.

ATC-110
 TROUBLE DIAGNOSIS

COMPONENT INSPECTION
In-vehicle Sensor A
After disconnecting in-vehicle sensor connector, measure resistance
between terminals 1 and 4 at sensor component side, using the table
below. B

Temperature °C (°F) Resistance kΩ

−15 (5) 21.40 C
−10 (14) 16.15
−5 (23) 12.29
0 (32) 9.41 D
5 (41) 7.27
10 (50) 5.66
E
15 (59) 4.45
20 (68) 3.51
25 (77) 2.79 F
30 (86) 2.24
35 (95) 1.80
G
40 (104) 1.45
45 (113) 1.18

If NG, replace in-vehicle sensor. MJIB0353E H

ATC

ATC-111
 TROUBLE DIAGNOSIS

Optical Sensor Circuit EJS006BY

COMPONENT DESCRIPTION
The optical sensor is located in the center of the defroster grille. It
detects sunload entering through windshield by means of a photo
diode. The sensor converts the sunload into a current value which is
then input into the front air control.

MJIB0172E

OPTICAL INPUT PROCESS

The front air control includes a processing circuit which averages the variations in detected sunload over a
period of time. This prevents adjustments in the ATC system operation due to small or quick variations in
detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the optical sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (44 or 46 is
indicated on front air control as a result of conducting self-diagnosis).

MJIB0181E

1. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector and sunload sensor con-
nector.
3. Check continuity between sunload sensor harness connector
M63 terminal 1 and 2 and front air control harness connector
M61 terminal 29 and 37.
1 - 29 : Continuity should exist.
2 - 37 : Continuity should exist.
4. Check continuity between sunload sensor harness connector MJIB0086E
M63 terminal 1 and 2 and ground.
1, 2 - Ground. : Continuity should not exist.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.

ATC-112
 TROUBLE DIAGNOSIS

2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL A
1. Turn ignition switch OFF.
2. Disconnect front air control connector and sunload sensor con-
nector. B
3. Check continuity between sunload sensor harness connector
M63 terminal 3 and front air control harness connector M60 ter-
minal 13. C
3 - 13 : Continuity should exist.
4. Check continuity between sunload sensor harness connector D
M63 terminal 3 and ground.
MJIB0087E

3 - Ground : Continuity should not exist.

OK or NG E
OK >> Replace sunload sensor.
NG >> Repair harness or connector.
F

ATC

ATC-113
 TROUBLE DIAGNOSIS

Intake Sensor Circuit EJS006BZ

COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit. It converts
temperature of air after it passes through the evaporator into a resis-
tance value which is then input to the front air control.

MJIB0173E

DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR

SYMPTOM: Intake sensor circuit is open or shorted. (56 or 57 is indi-
cated on front air control as a result of conducting Self-diagnosis.)

WJIA1156E

1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M82
terminal 2 and ground.
2 - Ground : Approx. 5V
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
WJIA1278E

2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M82
terminal 1 and front air control harness connector M60 terminal
13.
1 - 13 : Continuity should exist.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
WJIA1157E

ATC-114
 TROUBLE DIAGNOSIS

3. CHECK INTAKE SENSOR A

Refer to ATC-115, "Intake Sensor" .
OK or NG
OK >> 1. Replace front air control. B
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.
NG >> 1. Replace intake sensor. C
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno-
sis.
D
4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF. E
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M82
terminal 2 and front air control harness connector M60 terminal F
12.
2 - 12 : Continuity should exist.
4. Check continuity between intake sensor harness connector M82 G
terminal 2 and ground.
2 - Ground : Continuity should not exist. WJIA1158E
H
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosis ATC-55, "A/C System Self-diagnosis Function" and perform self-diagno- I
sis.
NG >> Repair harness or connector.
ATC
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector, measure resistance K
between sensor terminals 1 and 2, using the table below.
Temperature °C (°F) Resistance kΩ
L
−15 (5) 209.8
−10 (14) 160.3
−5 (23) 123.4 M
0 (32) 95.8
5 (41) 74.9
10 (50) 59.0
15 (59) 46.8
20 (68) 37.4
25 (77) 30.0
30 (86) 24.2
35 (95) 19.7
40 (104) 16.1
45 (113) 13.2

If NG, replace intake sensor.

MJIB0174E

ATC-115
 CONTROL UNIT

CONTROL UNIT PFP:27500

Removal and Installation EJS006C0

REMOVAL
1. Remove cluster lid C. Refer to IP-11, "CLUSTER LID C" .
2. Remove the four screws securing the front air control to cluster
lid C.
3. Remove the front air control.

LBIA0416E

INSTALLATION
Installation is in the reverse order of removal.

ATC-116
 AMBIENT SENSOR

AMBIENT SENSOR PFP:27722

A
Removal and Installation EJS006C1

REMOVAL
1. Remove the front grille. Refer to EI-19, "FRONT GRILLE" .
B
2. Disconnect the ambient sensor electrical connector.
NOTE:
The ambient sensor is located behind the front bumper, in front
C
of the condenser.
3. Release the ambient sensor clip and then remove the ambient
sensor.
D

E
MJIB0175E

INSTALLATION
Installation is in the reverse order of removal. F

ATC

ATC-117
 IN-VEHICLE SENSOR

IN-VEHICLE SENSOR PFP:27720

Removal and Installation EJS006C2

REMOVAL
1. Remove the cluster lid D. Refer toIP-12, "CLUSTER LID D" .
2. Remove the two screws and remove the in-vehicle sensor.

WJIA1073E

INSTALLATION
Installation is in the reverse order of removal.

ATC-118
 OPTICAL SENSOR

OPTICAL SENSOR PFP:28576

A
Removal and Installation EJS006C3

The optical sensor is located in the top center of the instrument

panel. B

WJIA1072E

ATC

ATC-119
 INTAKE SENSOR

INTAKE SENSOR PFP:27723

Removal and Installation EJS006C4

REMOVAL
1. Remove the front kick plate.
2. Remove the instrument panel side finisher.
3. Remove the glove box.
4. Remove the front pillar finisher.
5. Remove the upper glove box (cluster lid E).
6. Disconnect the intake sensor electrical connector.
NOTE:
The intake sensor is located on the top of the heater and cooling
unit assembly next to the A/C evaporator cover.
7. Twist the intake sensor to remove the intake sensor from the
heater and cooling unit assembly.

MJIB0325E

INSTALLATION
Installation is in the reverse order of removal.

ATC-120
 BLOWER MOTOR

BLOWER MOTOR PFP:27226

A
Components EJS006C5

G
MJIB0210E

1. Heater and cooling unit assembly 2. Blower motor 3. Variable blower control

Removal and Installation EJS006C6

H
REMOVAL
1. Remove the lower glove box assembly. Refer toIP-10, "Removal and Installation" .
2. Disconnect the blower motor electrical connector. I
3. Remove the three screws and remove the blower motor.
INSTALLATION ATC
Installation is in the reverse order of removal.

ATC-121
 AIR CONDITIONER FILTER

AIR CONDITIONER FILTER PFP:27277

Removal and Installation EJS006C7

FUNCTION
The air inside the passenger compartment is filtered by the air condi-
tioner filters when the heater or A/C controls are set on either the
recirculation or fresh mode. The two air conditioner filters are located
in the heater and cooling unit assembly.

MJIB0215E

REPLACEMENT TIMING
Replacement of the two air conditioner filters is recommended on a regular interval depending on the driving
conditions. Refer to MA-8, "PERIODIC MAINTENANCE" . It may also be necessary to replace the two air con-
ditioner filters as part of a component replacement if the air conditioner filters are damaged.
REPLACEMENT PROCEDURE
1. Remove the RH lower dash side finisher. Refer to EI-33, "BODY SIDE TRIM" .
2. Remove the front pillar lower finisher. Refer to EI-33, "BODY SIDE TRIM" .
3. Remove the lower glove box.
a. Remove the two lower glove box lower screws.
b. Open the lower glove box, then remove the two lower glove box
upper screws.
c. Disconnect the two upper clips and remove the lower glove box
from the instrument panel to access the air conditioner filter
cover.

WLIA0023E

4. Remove the screw and remove the air conditioner filter cover.
5. Remove the air conditioner filters from the heater and cooling
unit housing.

MJIB0216E

ATC-122
 AIR CONDITIONER FILTER

6. Insert the first new air conditioner filter into the heater and cool-
ing unit housing and slide it over to the right. Insert the second A
new air conditioner filter into the heater and cooling unit housing.
NOTE:
The air conditioner filters are marked with air flow arrows. The B
end of the microfilter with the arrow should face the rear of the
vehicle. The arrows should point downward.
C

LJIA0148E

D
7. Install the air conditioner filter cover.

G
MJIB0216E

8. Install the lower glove box in reverse order of removal. H

Lower glove box lower screws : 3.3 N·m (0.34 kg-m, 29 in-lb)
Lower glove box upper screws : 3.3 N·m (0.34 kg-m, 29 in-lb)
NOTE: I
● Use the two tabs at the bottom of the lower glove box to align the lower glove box for installation.

● The clips at the top of the lower glove box must be fully seated before installing the lower glove box
upper and lower screws. ATC

ATC-123
 HEATER & COOLING UNIT ASSEMBLY

HEATER & COOLING UNIT ASSEMBLY PFP:27110

Components EJS006C8

Heater and Cooling Unit Assembly —LHD Models—

MJIB0278E

1. High-pressure A/C pipe 2. Low-pressure A/C pipe 3. Expansion valve

4. Heater core and evaporator pipes 5. A/C drain hose grommet 6. A/C drain hose
grommet
7. Heater core pipes 8. Coolant reservoir hose 9. Heater and cooling unit assembly

ATC-124
 HEATER & COOLING UNIT ASSEMBLY

Heater and Cooling Unit Assembly —RHD Models—

A

ATC

MJIB0279E

1. High-pressure A/C pipe A 2. High-pressure A/C pipe B 3. Low-pressure A/C pipe

4. Expansion valve 5. Heater core and evaporator pipes 6. A/C drain hose grommet
grommet
7. A/C drain hose 8. Heater core pipe mounts 9. Heater core pipes
10. Heater and cooling unit assembly

ATC-125
 HEATER & COOLING UNIT ASSEMBLY

Removal and Installation EJS006C9

REMOVAL
1. Discharge the refrigerant from the A/C system. Refer toATC-138, "Discharging Refrigerant" .
2. Drain the coolant from the engine cooling system. Refer to CO-8, "DRAINING ENGINE COOLANT" .
3. Remove the heater core pipes RH nut.
4. Disconnect the heater core hoses from the heater core.
5. Disconnect the high- and low-pressure A/C pipes from the
expansion valve.
6. Move the two front seats to the rearmost position on the seat
track.
7. Remove the instrument panel and console panel. Refer to IP-10,
"Removal and Installation" .
8. Remove the two front floor ducts.
9. Remove the steering column. Refer to PS-10, "Removal and LJIA0165E

Installation" .
10. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse
block (SMJ) electrical connectors. Refer to PG-38, "Harness Layout" .
11. Remove the covers then remove the three steering member bolts from each side to disconnect the steer-
ing member from the vehicle body.
12. Remove the heater and cooling unit assembly with it attached to the steering member, from the vehicle.
CAUTION:
● Use care not to damage the seats and interior trim panels when removing the heater and cooling
unit assembly with it attached to the steering member.
● Use suitable plugs on the heater core pipes to prevent coolant leakage.

13. Remove the heater and cooling unit assembly from the steering member.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
● Replace the O-ring of the low-pressure A/C pipe and high-pressure A/C pipe with a new one, and
apply compressor oil to the O-ring for installation.
● After charging the refrigerant, check for leaks. Refer to ATC-150, "Checking for Refrigerant Leaks"
.
NOTE:
● Fill the engine cooling system with the specified coolant mixture. Refer to CO-8, "REFILLING ENGINE
COOLANT" .
● Recharge the A/C system. Refer toATC-138, "Evacuating System and Charging Refrigerant" .

ATC-126
 HEATER CORE

HEATER CORE PFP:27140

A
Components EJS006CA

MJIB0211E

1. Heater core and evaporator pipe bracket 2. Heater core 3. Heater and cooling unit assembly ATC
4. Heater core cover

Removal and Installation EJS006CB

K
REMOVAL
1. Remove the heater and cooling unit assembly. Refer to ATC-126, "REMOVAL" .
2. Remove the three screws and remove the heater core cover. L
3. Remove the heater core and evaporator pipe bracket.
4. Remove the heater core.
NOTE: M
If the air conditioner filters are contaminated from coolant leak-
ing from the heater core, replace the air conditioner filters with
new ones before installing the new heater core.

MJIB0216E

INSTALLATION
Installation is in the reverse order of removal.

ATC-127
 HEATER PUMP

HEATER PUMP PFP:92264

Components EJS006CC

Heater Pump

LBIA0414E

1. Cowl top 2. Heater pump electrical connector 3. Heater pump

4. Heater hose 5. Heater hose

Removal and Installation EJS006DC

REMOVAL
1. Partially drain the engine cooling system. Refer to CO-8, "DRAINING ENGINE COOLANT" .
2. Disconnect the heater pump electrical connector.
3. Disconnect the two heater hoses.
4. Remove the heater pump from the bracket securing the heater pump to the cowl top.
CAUTION:
Do not disassemble the heater pump, replace the heater pump as an assembly.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
● The heater pump rubber mount must be fully seated on the bracket.
● Do not disassemble the heater pump, replace the heater pump as an assembly.

ATC-128
 INTAKE DOOR MOTOR

INTAKE DOOR MOTOR PFP:27730

A
Components EJS006CD

Intake Door Motor - Heater and Cooling Unit Assembly

NOTE: B
This illustration is for LHD models. The layout for RHD models is symmetrically opposite.

ATC

LBIA0415E

1. Heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (driver) K
4. Variable blower control 5. Air mix door motor (passenger) 6. Mode door motor

Removal and Installation EJS006DD

L
REMOVAL
1. Remove the heater and cooling unit assembly. Refer to ATC-124, "HEATER & COOLING UNIT ASSEM-
BLY" .
2. Remove the steering member from the heater and cooling unit assembly. M
3. Disconnect the intake door motor electrical connector.
4. Remove the three screws and remove the intake door motor.
INSTALLATION
Installation is in the reverse order of removal.

ATC-129
 MODE DOOR MOTOR

MODE DOOR MOTOR PFP:27731

Components EJS006CE

Mode Door Motor - Heater and Cooling Unit Assembly

NOTE:
This illustration is for LHD models. The layout for RHD models is symmetrically opposite.

LBIA0415E

1. Heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (driver)
4. Variable blower control 5. Air mix door motor (passenger) 6. Mode door motor

Removal and Installation EJS006DE

REMOVAL
1. Remove the instrument panel side finisher. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove the lower instrument cover. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
3. Disconnect the mode door motor electrical connector.
4. Remove the three screws and remove the mode door motor.
INSTALLATION
Installation is in the reverse order of removal.

ATC-130
 AIR MIX DOOR MOTOR

AIR MIX DOOR MOTOR PFP:27732

A
Components EJS006CF

Air Mix Door Motors - Heater and Cooling Unit Assembly

NOTE: B
This illustration is for LHD models. The layout for RHD models is symmetrically opposite.

ATC

LBIA0415E

1. Heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (driver) K
4. Variable blower control 5. Air mix door motor (passenger) 6. Mode door motor

Removal and Installation EJS006CG

L
AIR MIX DOOR MOTOR (DRIVER)
Removal
1. Remove the heater and cooling unit assembly. Refer to ATC-124, "HEATER & COOLING UNIT ASSEM-
BLY" . M
2. Remove the steering member from the heater and cooling unit assembly.
3. Disconnect the air mix door motor electrical connector.
4. Remove the three screws and remove the air mix door motor.
Installation
Installation is in the reverse order of removal.
AIR MIX DOOR MOTOR (PASSENGER)
Removal
1. Remove the instrument panel side finisher. Refer to EI-33, "Components" .
2. Remove the lower instrument panel RH. Refer to IP-15, "LOWER INSTRUMENT PANEL RH AND
GLOVE BOX" .
3. Remove the steering member from the heater and cooling unit assembly.
4. Disconnect the air mix door motor electrical connector.
5. Remove the three screws and remove the air mix door motor.

ATC-131
 AIR MIX DOOR MOTOR

Installation
Installation is in the reverse order of removal.

ATC-132
 VARIABLE BLOWER CONTROL

VARIABLE BLOWER CONTROL PFP:27200

A
Components EJS006CH

Variable Blower Control - Heater and Cooling Unit Assembly

NOTE: B
This illustration is for LHD models. The layout for RHD models is symmetrically opposite.

ATC

LBIA0415E

1. Heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (driver) K
4. Variable blower control 5. Air mix door motor (passenger) 6. Mode door motor

Removal and Installation EJS006DF

L
REMOVAL
1. Disconnect the variable blower control electrical connector.
2. Remove the two screws and remove the variable blower control.
M
INSTALLATION
Installation is in the reverse order of removal.

ATC-133
 DUCTS AND GRILLES

DUCTS AND GRILLES PFP:27860

Components EJS006CJ

Ducts - Heater and Cooling Unit Assembly

MJIB0212E

1. Defroster nozzle 2. LH side demister duct 3. LH ventilator duct

4. RH side demister duct 5. RH ventilator duct 6. Center ventilator duct
7. Heater and cooling unit assembly 8. Floor connector duct grilles 9. Floor connector duct

ATC-134
 DUCTS AND GRILLES

10. Front floor ducts 11. Rear floor ducts 12. Rear console duct
13. Center console duct 14. Front console duct A

Grilles
B

ATC

M
MJIB0329E

1. Headliner 2. Overhead grilles 3. Instrument panel

4. LH side ventilator grille 5. LH ventilator grille 6. RH ventilator grille
7. RH side ventilator grille 8. RH side demister grille

ATC-135
 DUCTS AND GRILLES

Removal and Installation EJS006CK

CONSOLE DUCTS AND CONSOLE GRILLE

Removal
The center console must be removed and disassembled to remove the console ducts and the console grille.
Refer toIP-16, "CENTER CONSOLE" .
Installation
Installation is in the reverse order of removal.
DEFROSTER NOZZLE
Removal
1. Remove the instrument panel trim. Refer to IP-10, "Removal and Installation" .
2. Remove the defroster nozzle.
Installation
Installation is in the reverse order of removal.
RH AND LH SIDE DEMISTER DUCT
Removal
1. Remove the instrument panel trim. Refer to IP-10, "Removal and Installation" .
2. Remove the center console. Refer to IP-16, "CENTER CONSOLE" .
3. Remove the RH or LH side demister duct.
Installation
Installation is in the reverse order of removal.
RH AND LH VENTILATOR DUCT
Removal
1. Remove the instrument panel trim. Refer to IP-10, "Removal and Installation" .
2. Remove the center console. Refer toIP-16, "CENTER CONSOLE" .
3. Remove the RH or LH ventilator duct.
Installation
Installation is in the reverse order of removal.
CENTER VENTILATOR DUCT
Removal
1. Remove the heater and cooling unit assembly. Refer to ATC-126, "REMOVAL" .
2. Remove the center console. Refer to IP-16, "CENTER CONSOLE" .
3. Remove the defroster nozzle.
4. Remove the RH and LH ventilator ducts.
5. Remove the RH and LH side demister ducts.
6. Remove the center ventilator duct.
Installation
Installation is in the reverse order of removal.
FLOOR CONNECTOR DUCT
Removal
1. Remove the heater and cooling unit assembly. Refer to ATC-126, "REMOVAL" .
2. Remove the center console. Refer to IP-16, "CENTER CONSOLE" .
3. Remove the floor connector duct.
Installation
Installation is in the reverse order of removal.

ATC-136
 DUCTS AND GRILLES

FRONT AND REAR FLOOR DUCTS

Removal A
1. Remove the center console. Refer toIP-16, "CENTER CONSOLE" .
2. Remove the floor carpet. Refer toEI-38, "Removal and Installation" .
B
3. Remove the clips and remove the front and rear floor ducts.
Installation
Installation is in the reverse order of removal. C
REAR OVERHEAD DUCTS
Removal
1. Remove the rear RH interior trim panel. Refer to EI-33, "BODY SIDE TRIM" . D
2. Remove the headliner. Refer to EI-40, "HEADLINING" .
NOTE:
E
The rear headliner duct (connected to the rear upper overhead duct) is part of the headliner and is
replaced as an assembly.
3. Remove the clips and remove the rear upper and lower overhead ducts.
F
Installation
Installation is in the reverse order of removal.
SIDE REAR FLOOR DUCT G
Removal
1. Remove the rear RH interior trim panel. Refer to EI-33, "BODY SIDE TRIM" .
H
2. Reposition the floor carpet out of the way.
3. Remove the clips and remove the side rear floor duct.
Installation I
Installation is in the reverse order of removal.
GRILLES
ATC
Removal
1. Remove the necessary interior trim panel(s) to access the grille. Refer toIP-10, "Removal and Installation"
.
K
NOTE:
The overhead grilles are part of the headliner. To replace the overhead grilles the headliner must be
replaced. Refer to EI-40, "HEADLINING" .
2. Remove the grille from the interior trim panel. L

Installation
Installation is in the reverse order of removal. M

ATC-137
 REFRIGERANT LINES

REFRIGERANT LINES PFP:92600

HFC-134a (R-134a) Service Procedure EJS006CL

SETTING OF SERVICE TOOLS AND EQUIPMENT

Discharging Refrigerant

WJIA1160E

1. Shut-off valve 2. A/C service valve 3. Recovery/Recycling equipment ACR 2000

(J-43600) with refrigerant identifier

WARNING:
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) refrigerant from the A/C system using certified service equipment
meeting requirements of SAE J2210 HFC-134a (R-134a) recycling equipment or SAE J2201 HFC-134a
(R-134a) recovery equipment. If an accidental system discharge occurs, ventilate the work area before
resuming service. Additional health and safety information may be obtained from the refrigerant and
lubricant manufacturers.
Evacuating System and Charging Refrigerant

WJIA1161E

1. Shut-off valve 2. A/C service valve 3. Recovery/Recycling equipment ACR

2000 (J-43600) with refrigerant identifier

ATC-138
 REFRIGERANT LINES

4. Refrigerant container (HFC-134a) 5. Refrigerant weight scale (J-39699) 6. Vacuum pump (J-39649)
7. Manifold gauge set with hoses and A
couplers (J-39183-C)

ATC

WJIA0530E

*1 ATC-24, "CHECKING AND *3 ATC-150, "Checking for Refrigerant *5 ATC-4, "Contaminated Refrigerant".
ADJUSTING". Leaks".
*2 ATC-150, "Checking for Refrigerant *4 ATC-94, "PERFORMANCE TEST
Leaks". DIAGNOSES".

ATC-139
 REFRIGERANT LINES

Components EJS006CM

A/C Compressor and Condenser —LHD Models—

MJIB0276E

1. High-pressure service valve 2. Clip 3. High-pressure A/C pipe

4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible A/C hose 8. Low-pressure flexible A/C hose 9. Low-pressure service valve
10. Low-pressure A/C pipe 11. Expansion valve 12. A/C drain hose

ATC-140
 REFRIGERANT LINES

A/C Compressor and Condenser —RHD Models—

A

ATC

MJIB0277E

1. High-pressure service valve 2. Clip 3. High-pressure A/C pipe

4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible A/C hose 8. Low-pressure flexible A/C hose 9. Low-pressure service valve
10. Low-pressure A/C pipe 11. Expansion valve 12. A/C drain hose

NOTE:
Refer to ATC-5, "Precautions for Refrigerant Connection" .

ATC-141
 REFRIGERANT LINES

Removal and Installation for Compressor EJS006CN

A/C Compressor Mounting

MJIB0179E

1. Compressor 2. Alternator and A/C compressor 3. Timing chain case

bracket
4. Cylinder block

REMOVAL
1. Discharge the A/C refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
2. Remove the front left wheel and tire assembly. Refer to WT-5, "Rotation" .
3. Remove the engine cover.
4. Remove the front left mud guard.
5. Remove the front left splash shield.
6. Remove the engine air cleaner and air ducts. Refer toEM-15, "AIR CLEANER AND AIR DUCT" .
7. Remove the drive belt. Refer to EM-12, "DRIVE BELTS" .
8. Disconnect the compressor harness connector.
9. Disconnect both the front high-pressure flexible A/C hose and front low-pressure flexible A/C hose from
the compressor.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
10. Remove the A/C compressor bolts using power tools.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
● Replace the O-ring of the front low-pressure flexible A/C hose and front high-pressure flexible A/C
hose with a new one, apply compressor oil to the O-rings before installation.
● After recharging the A/C system with refrigerant, check for leaks. Refer to ATC-150, "Checking for
Refrigerant Leaks" .

ATC-142
 REFRIGERANT LINES

Removal and Installation for Compressor Clutch EJS006CO

A
Magnet Clutch Assembly

WJIA1162E G
1. Magnet clutch assembly 2. Magnet coil 3. Pulley
4. Clutch disc 5. Snap ring 6. Thermal protector (built in)
7. Compressor H

REMOVAL
1. Remove the compressor. Refer toATC-142, "Removal and Installation for Compressor" . I
2. Remove the center bolt while holding the clutch disc stationary
using Tool as shown.
Tool number : J-44614 ATC
3. Remove the clutch disc.
K

L
WHA228

4. Remove the snap ring using external snap ring pliers or suitable
M
tool.

RHA072C

ATC-143
 REFRIGERANT LINES

5. Remove the pulley using Tool with a small adapter. Position the
small adapter on the end of the drive shaft and the center of the
puller on the small adapter.
Tool number : KV99233130
CAUTION:
To prevent deformation of the pulley groove, the puller
claws should be hooked under the pulley groove and not
into the pulley groove.

WJIA1017E

6. Remove the magnet coil harness clip using a screwdriver,

remove the three magnet coil fixing screws and remove the
magnet coil.

WHA212

INSPECTION
Clutch Disc
If the contact surface shows signs of damage due to excessive heat,
replace clutch disc and pulley.

WHA183

Pulley
Check the appearance of the pulley assembly. If contact surface of pulley shows signs of excessive grooving,
replace clutch disc and pulley. The contact surfaces of the pulley assembly should be cleaned with a suitable
solvent before reinstallation.
Coil
Check magnet coil for loose connections or any cracked insulation.
INSTALLATION
1. Install the magnet coil.
CAUTION:
Be sure to align the magnet coil pin with the hole in the
compressor front head.

WHA213

ATC-144
 REFRIGERANT LINES

2. Install the magnet coil harness clip using a screwdriver.

3. Install the pulley assembly using Tool and a wrench, then install A
the snap ring using snap ring pliers.
Tool number : KV99106200
B

MJIB0290E
D

4. Install the clutch disc on the compressor shaft, together with the
original shim(s). Press the clutch disc down by hand.
E

WHA184

H
5. Install the clutch pulley bolt using Tool, to prevent the clutch disc
from turning and tighten the bolt to specification. Refer to ATC-
140, "Components" .
I
Tool number : J-44614
CAUTION:
After tightening the clutch pulley bolt, check that the clutch ATC
pulley rotates smoothly.

K
WHA229

6. Check the pulley clearance all the way around the clutch disc as
shown. L

Clutch disc-to-pulley clearance : 0.3 - 0.6 mm

(0.012 - 0.024 in)
M
7. If the specified clearance is not obtained, replace the adjusting
spacer to readjust.
8. Connect the compressor electrical connector.
9. Install the drive belt. Refer to EM-12, "DRIVE BELTS" .
10. Install the engine under cover and the splash shield.

WHA194

ATC-145
 REFRIGERANT LINES

BREAK-IN OPERATION
When replacing compressor clutch assembly, always conduct the break-in operation. This is done by engag-
ing and disengaging the clutch about 30 times. Break-in operation raises the level of transmitted torque.
Removal and Installation for High-pressure Flexible A/C Hose EJS006CP

REMOVAL
1. Remove the front left wheel and tire assembly. Refer to WT-5, "Rotation" .
2. Remove the front left mud guard.
3. Remove the front left splash shield.
4. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
5. Remove the high-pressure flexible A/C hose. Refer toATC-140, "Components" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-140, "Components" .
CAUTION:
● Replace the O-ring of the high-pressure flexible A/C hose with a new one, then apply compressor
oil to it for installation.
● After charging refrigerant, check for leaks.
Removal and Installation for High-pressure A/C Pipe EJS006CQ

REMOVAL
1. Remove the front right wheel and tire assembly. Refer toWT-5, "Rotation" .
2. Remove the front right mud guard.
3. Remove the front right splash shield.
4. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
5. Remove the low pressure A/C pipe. Refer to ATC-147, "Removal and Installation for Low-pressure A/C
Pipe" .
6. Remove the high-pressure A/C pipe. Refer to ATC-146, "Removal and Installation for High-pressure A/C
Pipe" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-140, "Components" .
CAUTION:
● Replace the O-ring of the high-pressure A/C pipe with a new one, then apply compressor oil to it
for installation.
● After charging refrigerant, check for leaks.
Removal and Installation for Low-pressure Flexible A/C Hose EJS006CR

REMOVAL
1. Remove the front right wheel and tire assembly. Refer to WT-5, "Rotation" .
2. Remove the front right mud guard.
3. Remove the front right splash shield.
4. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
5. Remove the low-pressure flexible A/C hose. Refer toATC-140, "Components" .
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-140, "Components" .

ATC-146
 REFRIGERANT LINES

CAUTION:
● Replace the O-ring of the low-pressure flexible A/C hose with a new one, then apply compressor A
oil to it for installation.
● After charging refrigerant, check for leaks.
Removal and Installation for Low-pressure A/C Pipe EJS006CS
B
REMOVAL
1. Discharge the refrigerant. Refer toATC-138, "HFC-134a (R-134a) Service Procedure" .
2. Disconnect the heater pump connector. C
3. Remove the heater pump from the bracket and reposition out of the way. Do not disconnect the heater
hoses from the heater pump.
D
4. Remove the low-pressure A/C pipe. Refer to ATC-140, "Components" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
E
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-140, "Components" . F
CAUTION:
● Replace the O-ring of the low-pressure A/C pipe with a new one, then apply compressor oil to it for
installation.
G
● After charging refrigerant, check for leaks.
Removal and Installation for Refrigerant Pressure Sensor EJS006CV

REMOVAL H
1. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
2. Disconnect the refrigerant pressure sensor harness connector
and remove the refrigerant pressure sensor from the condenser. I
CAUTION:
Be careful not to damage the condenser fins.
ATC

LJIA0177E
L
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-140, "Components" .
M
CAUTION:
● Be careful not to damage the condenser fins.
● Apply compressor oil to the O-ring of the refrigerant pressure sensor for installation.
● After charging refrigerant, check for leaks.
Removal and Installation for Condenser EJS006CW

REMOVAL
1. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
2. Remove the radiator. Refer to CO-11, "RADIATOR" .
CAUTION:
Be careful not to damage the core surface of the condenser and the radiator.
3. Disconnect the high-pressure flexible A/C hose and the high-pressure A/C pipe from the condenser.
CAUTION:
Cap or wrap the joint of the pipes with suitable material such as vinyl tape to avoid the entry of air.

ATC-147
 REFRIGERANT LINES

4. Disconnect the refrigerant pressure sensor harness connector.

5. Remove the refrigerant pressure sensor from the condenser.
6. Lift the condenser out of the mounting grommets and remove
the condenser.

LJIA0177E

INSTALLATION
Installation is in the reverse order of removal.
Refer toATC-140, "Components" .
CAUTION:
● Replace the O-rings of the high-pressure A/C pipe and the high-pressure flexible A/C hose with
new ones, then apply compressor oil to them for installation.
● After charging refrigerant, check for leaks.
● Replace the mounting grommets as necessary.

ATC-148
 REFRIGERANT LINES

Removal and Installation for Evaporator EJS006CX

A
Heater and Cooling Unit Assembly

ATC

MJIB0214E

1. Center ventilator connector duct 2. Heater core cover 3. Intake air case
4. Heater core and evaporator pipes 5. Heater core and evaporator pipes 6. Heater core
bracket grommet
7. Upper heater and cooling unit case 8. Expansion valve 9. Evaporator
10. Lower heater and cooling unit case 11. Variable blower control 12. Blower motor

REMOVAL
1. Remove the heater core. Refer to ATC-127, "REMOVAL" .
2. Separate the heater and cooling unit case.
3. Remove the evaporator.
INSTALLATION
Installation is in the reverse order of removal.
ATC-149
 REFRIGERANT LINES

CAUTION:
Replace the O-rings on the A/C low-pressure flexible A/C hose and the high-pressure A/C pipe with
new ones. Apply compressor oil to the O-rings for installation.
Removal and Installation for Expansion Valve EJS006CZ

REMOVAL
1. Discharge the refrigerant. Refer to ATC-138, "HFC-134a (R-134a) Service Procedure" .
2. Remove the heater and cooling unit assembly. Refer to ATC-126, "REMOVAL" .
3. Remove the heater core and evaporator pipes grommet.
4. Remove the expansion valve.
INSTALLATION
Installation is in the reverse order of removal.
Expansion valve bolts : 4 N·m (0.41 kg-m, 35 in-lb)
A/C refrigerant pipe to expansion valve bolt : Refer to ATC-140, "Components"
.
CAUTION:
● Replace the O-rings on then expansion valve and the A/C refrigerant pipes with new ones, then
apply compressor oil to them for installation.
● After charging refrigerant, check for leaks.
Checking for Refrigerant Leaks EJS006D1

Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent
dye leak detector.
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
Checking System for Leaks Using the Fluorescent Leak Detector EJS006D2

1. Check A/C system for leaks using the UV lamp and safety goggles [SST: J-42220] in a low sunlight area
(area without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a
bright green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain open-
ing indicates an evaporator core assembly (tubes, core or expansion valve) leak.
2. If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth, with the UV lamp for dye residue.
3. After the leak is repaired, remove any residual dye using dye cleaner [SST: J-43872] to prevent future mis-
diagnosis.
4. Perform a system performance check and verify the leak repair with an approved electronic refrigerant
leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.

ATC-150
 REFRIGERANT LINES

Dye Injection EJS006D3

A
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1. Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.45 bar, 3.52 kg/cm2 , 50 B
psi).
2. Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool [SST: J-41459].
3. Connect the injector tool to the A/C Low-pressure side service fitting. C
4. Start engine and switch A/C ON.
5. When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye
through the low-pressure service valve using dye injector tool J-41459 (refer to the manufacture’s operat- D
ing instructions).
6. With the engine still running, disconnect the injector tool from the service fitting.
CAUTION: E
Be careful the A/C system or replacing a component, pour the dye directly into the open system
connection and proceed with the service procedures.
7. Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the F
leak size, operating conditions and location of the leak, it may take from minutes to days for the dye to
penetrate a leak and become visible.
Electronic Refrigerant Leak Detector EJS006D4 G
PRECAUTIONS FOR HANDLING LEAK DETECTOR
When performing a refrigerant leak check, use an A/C electrical leak
detector (SST) or equivalent. Ensure that the instrument is calibrated H
and set properly per the operating instructions.
The leak detector is a delicate device. In order to use the leak detec-
tor properly, read the operating instructions and perform any speci-
fied maintenance. I

ATC

SHA705EB

K
1. Position probe approximately 5 mm (3/16 in) away from point to
be checked.
L

SHA707EA

2. When testing, circle each fitting completely with probe.

SHA706E

ATC-151
 REFRIGERANT LINES

3. Move probe along component approximately 25 to 50 mm (1 to

2 in)/sec.

SHA708EA

CHECKING PROCEDURE
To prevent inaccurate or false readings, make sure there is no refrigerant vapor, shop chemicals, or cigarette
smoke in the vicinity of the vehicle. Perform the leak test in calm area (low air/wind movement) so that the
leaking refrigerant is not dispersed.
1. Turn engine OFF.
2. Connect a suitable A/C manifold gauge set (SST) to the A/C service valves.
3. Check if the A/C refrigerant pressure is at least 345 kPa (3.45 bar, 3.52 kg/cm2 , 50 psi) above 16°C. If
less than specification, recover/evacuate and recharge the system with the specified amount of refriger-
ant.
NOTE:
At temperatures below 16°C, leaks may not be detected since the system may not reach 345 kPa (3.45
bar, 3.52 kg/cm2 , 50 psi).
4. Perform the leak test from the high-pressure side (compressor discharge a to evaporator inlet g) to the
low-pressure side (evaporator drain hose h to shaft seal l). Refer to ATC-140, "Components" . Perform a
leak check for the following areas carefully. Clean the component to be checked and move the leak
detected probe completely around the connection/component.
Compressor
Check the fitting of high- and low-pressure flexible hoses, relief valve and shaft seal.
Liquid tank
Check the refrigerant pressure sensor.
Service valves
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leaks).
NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at least 15 seconds to dissipate any refrigerant trace in the
cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer’s recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.
6. Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.
7. Start engine.
8. Set the heater A/C control as follows;
a. A/C switch: ON
b. MODE control dial: VENT (Ventilation)
c. Intake door position: Recirculation
d. Max. cold temperature
e. Fan speed: High
9. Run engine at 1,500 rpm for at least 2 minutes.

ATC-152
 REFRIGERANT LINES

10. Turn engine off and perform leak check again following steps 4 through 6 above.
Refrigerant leaks should be checked immediately after stopping A
the engine. Begin with the leak detector at the compressor. The
pressure on the high-pressure side will gradually drop after
refrigerant circulation stops and pressure on the low-pressure
B
side will gradually rise, as shown in the graph. Some leaks are
more easily detected when pressure is high.

SHA839E D

11. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-
ponent as necessary.
E
12. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.
13. Perform A/C performance test to ensure system works properly.
F

ATC

ATC-153
 SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS) PFP:00030

Service Data and Specifications (SDS) EJS006D5

COMPRESSOR
Make ZEXEL VALEO CLIMATE CONTROL
Model DKS-17D
Type Swash plate
Displacement 175.5 cm3 (10.7 in3 ) / revolution
Cylinder bore × stroke 30.5 mm (1.20 in) x 24.0 mm (0.94 in)
Direction of rotation Clockwise (viewed from drive end)
Drive belt Poly V

LUBRICANT
Make ZEXEL VALEO CLIMATE CONTROL
Model DKS-17D
Name Genuine NISSAN A/C System Lubricant Type S (DH-PS)
Part number KLH00-PAGS0
Without rear A/C 180 m (6.3 Imp fl oz)
Capacity
With rear A/C 210 m (7.4 Imp fl oz)

REFRIGERANT
Type HFC 134a (R-134a)
Without rear A/C 0.70 ± 0.05 kg (1.54 ± 0.11 lb)
Capacity
With rear A/C 0.85 ± 0.05 kg (1.87 ± 0.11 lb)

ENGINE IDLING SPEED

Refer to EC-38, "Basic Inspection" .
BELT TENSION
Refer to EM-13, "Deflection Adjustment" .

ATC-154