TRANSAXLE ASSEMBLY
MT-29
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36. Remove pinion gear (1) and pinion shaft (2) from clutch housing.
ASSEMBLY
1. Install pinion gear (1) and pinion shaft (2) into clutch housing.
2. Install two way connector (1) into clutch housing.
3. Install bushings (1) until they are flush with end face of clutch
housing using suitable tool (A).
PCIB1719E
PCIB1719E
PCIB1720E
PCIB1725E
MTC-1
AIR CONDITIONER
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SECTION MTC
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CONTENTS
MANUAL AIR CONDITIONER
SERVICE INFORMATION ............................3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for Procedure without Cowl Top Cover ......3
Precaution for Working with HFC-134a (R-134a) ......3
General Refrigerant Precaution ................................4
Oil Precaution ............................................................4
Precaution for Refrigerant Connection ......................4
Precaution for Service of Compressor ......................7
Precaution for Service Equipment .............................7
Precaution for Leak Detection Dye ...........................9
PREPARATION ..................................................10
Special Service Tool ...............................................10
HFC-134a (R-134a) Service Tool and Equipment ....10
Commercial Service Tool ........................................13
REFRIGERATION SYSTEM ..............................14
Refrigerant Cycle ....................................................14
Refrigerant System Protection ................................14
Component Part Location .......................................15
OIL ......................................................................16
Maintenance of Oil Quantity in Compressor ...........16
AIR CONDITIONER CONTROL .........................19
Control Operation ....................................................19
Discharge Air Flow ..................................................20
System Description .................................................20
CAN Communication System Description ...............21
TROUBLE DIAGNOSIS .....................................22
CONSULT-III Function (BCM) .................................22
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ......................................................
22
Component Parts and Harness Connector Loca-
tion ..........................................................................
23
Schematic ...............................................................25
Wiring Diagram - Heater - .......................................26
Wiring Diagram - A/C,M - ........................................27
Operational Check ...................................................30
Mode Door ...............................................................31
Air Mix Door .............................................................32
Intake Door ..............................................................33
Front Blower Motor Circuit .......................................33
Magnet Clutch Circuit (If Equipped) .........................37
Insufficient Cooling ..................................................45
Insufficient Heating ..................................................52
Noise .......................................................................53
CONTROLLER ..................................................55
Removal and Installation .........................................55
Disassembly and Assembly .....................................56
THERMO CONTROL AMPLIFIER ....................57
Removal and Installation .........................................57
A/C UNIT ASSEMBLY ......................................58
Removal and Installation .........................................58
Disassembly and Assembly .....................................60
BLOWER MOTOR ............................................62
Removal and Installation .........................................62
INTAKE DOOR ..................................................63
Intake Door Cable Adjustment .................................63
AIR MIX DOOR .................................................64
Air Mix Door Cable Adjustment ...............................64
MODE DOOR ....................................................65
Mode Door Cable Adjustment .................................65
BLOWER FAN RESISTOR ...............................66
Removal and Installation .........................................66
HEATER CORE .................................................67
Removal and Installation .........................................67
AIR CONDITIONER FILTER .............................68
Removal and Installation .........................................68
PRECAUTIONS
MTC-3
< SERVICE INFORMATION >
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SERVICE INFORMATION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001704274
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. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
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 performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
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 har-
ness connectors.
Precaution for Procedure without Cowl Top CoverINFOID:0000000001704275
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precaution for Working with HFC-134a (R-134a)INFOID:0000000001704276
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 a compressor mal-
function is likely to occur.
• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If
oil other than that specified is used, compressor malfunction is likely to occur.
• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
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 possible
to minimize the entry of moisture into system.
- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Use only approved recovery/recycling equipment to discharge HFC-134a (R-134a) refrigerant. If acci-
dental system discharge occurs, ventilate work area before resuming service. Additional health and
safety information may be obtained from refrigerant and oil manufacturers.
PIIB3706J
TROUBLE DIAGNOSIS
MTC-23
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Component Parts and Harness Connector LocationINFOID:0000000001704296
ENGINE COMPARTMENT
PASSENGER COMPARTMENT
Magnet clutch does not engage in A/C, de-
frost/foot, or defrost mode.Go to Trouble Diagnosis Procedure for Magnet Clutch.MTC-37
Insufficient cooling Go to Trouble Diagnosis Procedure for Insufficient Cooling.MTC-45
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.MTC-52
Noise Go to Trouble Diagnosis Procedure for Noise.MTC-53
Symptom Reference Page
1. Refrigerant pressure sensor E17 2. A/C compressor F3
WJIA2235E
MTC-34
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
NO >> GO TO 3.
2.PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to MTC-30, "
Operational Check".
Can a symptom be duplicated?
YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK FRONT BLOWER MOTOR CIRCUIT
Check front blower motor circuit. Refer to "DIAGNOSTIC PROCEDURE FOR FRONT BLOWER MOTOR" .
OK or NG?
OK >> If the symptom still exists, perform a complete operational check. Refer to MTC-30, "Operational
Check". If other symptoms exist, refer to MTC-22, "How to Perform Trouble Diagnosis for Quick
and Accurate Repair".
NG >> Repair as necessary.
DIAGNOSTIC PROCEDURE FOR FRONT BLOWER MOTOR
SYMPTOM: Blower motor operation is malfunctioning.
1.CHECK FRONT BLOWER MOTOR OPERATION
1. Turn ignition switch ON.
2. Check front blower motor operation at each fan speed.
OK or NG
OK >> Inspection End.
NG >> • Front blower motor does not operate at any speed, GO TO 2.
• Front blower motor does not operate at one or more of the four speeds, GO TO 10.
2.CHECK POWER SUPPLY FOR FRONT BLOWER MOTOR
1. Turn ignition switch OFF.
2. Disconnect front blower motor connector.
3. Turn ignition switch ON.
4. Check voltage between front blower motor harness connector
M62 terminal 1 and ground.
OK or NG
OK >> GO TO 6.
WJIA2259E
Te r m i n a l s
Vo l ta g e
(Approx.) (+) (−)
Connector Terminal
Ground
Front blower
motor: M621 Battery voltage
WJIA2228E
TROUBLE DIAGNOSIS
MTC-35
< SERVICE INFORMATION >
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NG >> Check power supply circuit and 15A fuses [Nos. 15 and 17, located in the fuse block (J/B)].
Refer to PG-3, "
Schematic".
• If fuses are OK, reinstall fuses and GO TO 3.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
3.CHECK BLOWER MOTOR RELAY POWER SUPPLY CIRCUITS
1. Turn ignition switch OFF.
2. Disconnect blower motor relay connector.
3. Turn ignition switch ON.
4. Check voltage between blower motor relay harness connector J-
1 terminal 1, 5 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK BLOWER MOTOR RELAY (SWITCH SIDE) CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Check continuity between blower motor relay harness connector
J-1 (A) terminal 3 and front blower motor harness connector
M62 (B) terminal 1.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5.CHECK BLOWER MOTOR RELAY GROUND CIRCUIT
Check continuity between blower motor relay harness connector J-1
terminal 2 and ground.
OK or NG
OK >> Replace blower motor relay.
NG >> Repair harness or connector.
6.CHECK FRONT BLOWER MOTOR
Check continuity between front blower motor terminals 1 and 2.
NOTE:
Ensure that there are no foreign particles inside the A/C unit assem-
bly for a smooth rotation of the front blower motor.
OK or NG
OK >> GO TO 7.
NG >> Replace front blower motor. Refer to MTC-62, "
Removal
and Installation".
7.CHECK CIRCUIT CONTINUITY BETWEEN FRONT BLOWER MOTOR AND FRONT AIR CONTROL 1 - Ground Battery voltage should exist.
5 - Ground Battery voltage should exist.
WJIA1783E
Continuity should exist.
WJIA2263E
Continuity should exist.
WJIA2264E
1 - 2 : Continuity should exist.
WJIA2230E
MTC-36
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
1. Disconnect front air control connector.
2. Check continuity between front blower motor harness connector
M62 (A) terminal 2 and front air control harness connector M33
(B) terminal 13.
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8.CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK >> GO TO 9.
NG >> Replace front air control. Refer to MTC-58, "
Removal and Installation".
9.CHECK FAN SWITCH GROUND CIRCUIT
Check continuity between front air control harness connector M33
terminal 9 and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
10.CHECK CIRCUIT CONTINUITY BETWEEN FRONT AIR CONTROL AND FRONT BLOWER MOTOR
RESISTOR
1. Turn ignition switch OFF.
2. Disconnect front blower motor resistor and front air control con-
nectors.
3. Check continuity between front air control harness connector
M33 (A) terminals and front blower motor resistor harness con-
nector M6 (B) terminals.
OK or NG
2 - 13 : Continuity should exist.
AWIIA0339ZZ
Terminals Condition Continuity
914 Blower control dial: OFF
Ye s 10 Blower control dial: 1-speed
11 Blower control dial: 2-speed
12 Blower control dial: 3-speed
13 Blower control dial: 4-speed
SJIA0732E
Continuity should exist.
SJIA0734E
AB
Continuity
Connector Terminal Connector Terminal
Front air control:
M3310
Front blower
motor resistor:
M61
Ye s 11 2
12 3
13 4
SJIA0733E
TROUBLE DIAGNOSIS
MTC-37
< SERVICE INFORMATION >
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OK >> GO TO 11.
NG >> Repair harness or connector.
11 .CHECK FAN SWITCH
Check continuity between front air control terminal 9 and 10, 11, 12,
13, 14.
OK or NG
OK >> Replace the front blower motor resistor. Refer to MTC-66, "Removal and Installation".
NG >> Replace front air control. Refer to MTC-58, "
Removal and Installation".
Magnet Clutch Circuit (If Equipped)INFOID:0000000001704305
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
1.CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - MAGNET CLUTCH
1. Turn ignition switch ON.
2. Turn blower control dial to the desired (1 to 4 speed) position.
3. Press the A/C switch. A/C indicator will turn on.
4. Confirm that the compressor clutch engages (sound or visual inspection).
Can the symptom be duplicated?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK FOR ANY SYMPTOMS
Perform a complete operational check for any symptoms. Refer to MTC-30, "
Operational Check".
Does another symptom exist?
YES >> Refer to MTC-22, "How to Perform Trouble Diagnosis for Quick and Accurate Repair".
NO >> System OK.
3.CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 4.
4.CHECK COMPRESSOR BELT TENSION
Check compressor belt tension. Refer to EM-13, "
Checking Drive Belts".
OK or NG
OK >> GO TO 5.
NG >> Adjust or replace A/C compressor belt.
5.CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. Refer to MTC-45, "
Insufficient Cooling".
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnosis for unusual pressure. Refer to MTC-45, "
Insufficient Cooling".
6.CHECK MAGNET CLUTCH CIRCUIT
Terminals Condition Continuity
914 Fan control dial: OFF
Ye s 10 Fan control dial: 1-speed
11 Fan control dial: 2-speed
12 Fan control dial: 3-speed
13 Fan control dial: 4-speed
SJIA0732E