heater NISSAN 350Z 2007 Z33 Automatic Air Conditioner Workshop Manual

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Revision: 2006 November2007 350Z SUNLOAD SENSOR .............................................. 106
Removal and Installation ...................................... 106
REMOVAL ......................................................... 106
INSTALLATION ................................................. 106
INTAKE SENSOR ................................................... 107
Removal and Installation ...................................... 107
REMOVAL ......................................................... 107
INSTALLATION ................................................. 107
BLOWER UNIT ....................................................... 108
Removal and Installation ...................................... 108
REMOVAL ......................................................... 108
INSTALLATION ................................................. 108
Disassembly and Assembly ................................. 109
BLOWER MOTOR ...................................................110
Removal and Installation ....................................... 110
REMOVAL .......................................................... 110
INSTALLATION .................................................. 110
INTAKE DOOR MOTOR .......................................... 111
Removal and Installation ...................................... . 111
REMOVAL ......................................................... . 111
INSTALLATION ................................................. . 111
HEATER & COOLING UNIT ASSEMBLY ...............112
Removal and Installation ....................................... 112
REMOVAL .......................................................... 112
INSTALLATION .................................................. 113
Disassembly and Assembly .................................. 114
MODE DOOR MOTOR ............................................116
Removal and Installation ....................................... 116
REMOVAL .......................................................... 116
INSTALLATION .................................................. 116
AIR MIX DOOR MOTOR ..........................................117
Removal and Installation ....................................... 117
REMOVAL .......................................................... 117
INSTALLATION .................................................. 117
HEATER CORE .......................................................118
Removal and Installation ....................................... 118
REMOVAL .......................................................... 118
INSTALLATION .................................................. 118
DUCTS AND GRILLES ...........................................119
Removal and Installation ....................................... 119
COMPONENT LAYOUT ..................................... 119
REMOVAL .......................................................... 119
INSTALLATION ................................................. 122
REFRIGERANT LINES ........................................... 123
HFC-134a (R-134a) Service Procedure ............... 123
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ................................................................ 123
Components ......................................................... 125
Removal and Installation of Compressor ............. 125REMOVAL .........................................................125
INSTALLATION .................................................126
Check Disc to Pulley Clearance ...........................126
Removal and Installation of Low-pressure Flexible
Hose and Pipe 2 ...................................................127
REMOVAL .........................................................127
INSTALLATION .................................................128
Removal and Installation of High-pressure Flexible
Hose .....................................................................128
REMOVAL .........................................................128
INSTALLATION .................................................129
Removal and Installation of High-pressure Pipe 1
(Engine Compartment) .........................................130
REMOVAL .........................................................130
INSTALLATION .................................................130
Removal and Installation of Low-pressure Pipe 1
and High-pressure Pipe 2 .....................................131
REMOVAL .........................................................131
INSTALLATION .................................................132
Removal and Installation of Liquid Tank ...............132
REMOVAL .........................................................132
INSTALLATION .................................................133
Removal and Installation of Condenser ................133
REMOVAL .........................................................133
INSTALLATION .................................................134
Removal and Installation of Refrigerant Pressure
Sensor ..................................................................135
REMOVAL .........................................................135
INSTALLATION .................................................135
Removal and Installation of Evaporator ................135
REMOVAL .........................................................135
INSTALLATION .................................................135
Removal and Installation of Expansion Valve .......137
REMOVAL .........................................................137
INSTALLATION .................................................137
Checking for Refrigerant Leaks ............................138
Checking System for Leaks Using the Fluorescent
Leak Detector .......................................................138
Dye Injection .........................................................138
Electrical Leak Detector ........................................139
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................139
CHECKING PROCEDURE ...............................140
SERVICE DATA AND SPECIFICATIONS (SDS) ....142
Compressor ..........................................................142
Lubricant ...............................................................142
Refrigerant ............................................................142
Engine Idling Speed .............................................142
Belt Tension ..........................................................142

TROUBLE DIAGNOSIS
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Revision: 2006 November2007 350Z
TROUBLE DIAGNOSISPFP:00004
CONSULT-III Function (BCM)NJS0000Q
CONSULT-III can display each diagnosis item using the diagnosis test modes shown following.
DATA MONITOR
Display Item List
System part Check item, diagnosis mode Description
BCM Data monitor Displays BCM input data in real time.
Monitor Item Condition Value/Status
IGNITION SW Ignition switch OFF → ON OFF → ON
HEATER FAN SW Ignition switch ONBlower fan motor switch ON ON
Blower fan motor switch OFF OFF
AIR COND SIG Ignition switch ONCompressor ON ON
Compressor ON OFF
AC PRESS SEN

Engine is running

Warm-up condition

Both A/C switch and blower fan motor switch: ON (Compressor
operates)1.0 - 4.0 V

ATC-62
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit assem-
bly. It rotates so that air is discharged from the outlet set by the uni-
fied meter and A/C amp. Motor rotation is conveyed to a link which
activates the mode door.
DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnosis procedure. Refer to AT C - 5 6 , "
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" .
RJIA0890E

TROUBLE DIAGNOSIS
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COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motor is attached to the heater & cooling unit
assembly. It rotates so that the air mix door is opened or closed to a
position set by the unified meter and A/C amp. Motor rotation is then
sent conveyed through a shaft and the air mix door position feed-
back is then sent to the unified meter and A/C amp. by PBR built-in
air mix door motor.
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
SYMPTOM: Discharge air temperature does not change.
Perform diagnosis procedure. Refer to AT C - 5 6 , "
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" .
Air Mix Door Motor PBR CircuitNJS00012
SYMPTOM

Discharge air temperature does not change.

PBR circuit is open or shorted.
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR
Perform diagnosis procedure. Refer to AT C - 5 6 , "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT" .
RJIA1383E

ATC-78
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
8. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-III
1. Start the engine.
2. Check voltage of refrigerant pressure sensor. Refer to EC-127, "
CONSULT-III Reference Value in Data
Monitor" .
WITHOUT CONSULT-III
1. Start the engine.
2. Check voltage between ECM harness connector M71 terminal 105 and ground.
OK or NG
OK >>
WITH CONSULT-III: GO TO 9.

WITHOUT CONSULT-III: GO TO 10.
NG >> Refer to EC-710, "
REFRIGERANT PRESSURE SENSOR" .
9. CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to AT C - 3 3 , "
CONSULT-III Function (BCM)" .
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect BCM connector and unified meter and A/C amp.
connector.
3. Check continuity between BCM harness connector M90 terminal
28 and unified meter and A/C amp. harness connector M50 ter-
minal 57.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
Terminals
Condition Voltage (+)
(−)
ECM con-
nectorTerminal No.
M71 105 GroundA/C switch: ON
(Blower motor
operates.)Approx. 1.0 - 4.0 V
FAN SW ON : HEATER FAN SW ON
FAN SW OFF : HEATER FAN SW OFF
28 – 57 : Continuity should exist.
RJIA2009E

ATC-94
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
COMPONENT INSPECTION
Ambient Sensor
After disconnecting ambient sensor connector E34, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to the table
below.
If NG, replace ambient sensor.
In-vehicle Sensor CircuitNJS0001B
COMPONENT DESCRIPTION
In-vehicle Sensor
The in-vehicle sensor is located on instrument driver panel lower. It
converts variations in temperature of compartment air drawn from
the aspirator into a resistance value. It is then input into the unified
meter and A/C amp.
Aspirator
The aspirator is located on driver’s side of heater & cooling unit
assembly. It produces vacuum pressure due to air discharged from
the heater & cooling unit assembly, continuously taking compartment
air in the aspirator.
Temperature °C (°F) Resistance kΩ
−15 (5) 12.73
−10 (14) 9.92
−5 (23) 7.80
0 (32) 6.19
5 (41) 4.95
10 (50) 3.99
15 (59) 3.24
20 (68) 2.65
25 (77) 2.19
30 (86) 1.81
35 (95) 1.51
40 (104) 1.27
45 (113) 1.07
RJIA2139E
PJIA0168E
RJIA1401E

ATC-100
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
Intake Sensor CircuitNJS0001D
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after it passes through the evaporator
into a resistance value which is then input to the unified meter and A/
C amp.
DIAGNOSIS PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (LED of A/C
switch does not illuminate as a result of performing self-diagnosis
STEP-2.)
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 M255
terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector
M255 terminal 1 and unified meter and A/C amp. harness con-
nector M50 terminal 49.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
RJIA1406E
RJIA1458E
2 – Ground : Approx. 5 V
RJIA2031E
1 – 49 : Continuity should exist.
RJIA2032E

ATC-112
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 November2007 350Z
HEATER & COOLING UNIT ASSEMBLYPFP:27110
Removal and InstallationNJS0001O
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Drain coolant from cooling system. Refer to CO-10, "
Changing Engine Coolant" .
3. Remove cowl top cover. Refer to EI-20, "
COWL TOP" .
4. Disconnect one-touch joint between low-pressure pipe 1 (1) and
low-pressure pipe 2 (2) with disconnector (SST: 9253089916)
(A).
CAUTION:
Cap or wrap the joint of low-pressure pipe 1 and low-pres-
sure pipe 2 with suitable material such as vinyl tape to
avoid the entry of air.
5. Disconnect one-touch-joint between high-pressure pipe 1 (3)
and high-pressure pipe 2 (4) with disconnector (SST:
9253089908) (A).
CAUTION:
Cap or wrap the joint of high-pressure pipe 1 and high-pres-
sure pipe 2 with suitable material such as vinyl tape to avoid the entry of air.
6. Remove clamps (A), and then disconnect two heater hoses (1) from heater core.
7. Remove instrument panel. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove blower unit. Refer to ATC-108, "
BLOWER UNIT" .
9. Remove clips of vehicle harness from steering member.
10. Remove mounting nuts and bolts, and then remove instrument stays (left and right).
11. Remove defroster nozzle and ventilator ducts. Refer to ATC-121, "
Removal of Defroster Nozzle, Ducts
and Ventilator Ducts" .
PJIA0176E
PJIA0177E
RJIA1418E

HEATER & COOLING UNIT ASSEMBLY
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12. Remove mounting bolts from heater & cooling unit assembly.
13. Remove steering column assembly mounting nuts and bolt.
14. Remove steering member mounting bolts, and then remove steering member.
15. Remove heater & cooling unit assembly.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of low-pressure pipe 2 and high-pressure pipe 1 with new ones, and then apply
compressor oil to it when installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight 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 that connection
does not come loose.

When recharging refrigerant, check for leaks.
NOTE:

When filling radiator with coolant, refer to CO-10, "Changing Engine Coolant" .

Recharge the refrigerant.
SJIA1221E
SJIA1222E
Heater & cooling unit assembly mounting bolts
: 6.9 N·m (0.7 kg-m, 61 in-lb)
Steering member and steering column assembly mounting nuts and bolt
: 12 N·m (1.2 kg-m, 9 ft-lb)

ATC-114
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 November2007 350Z
Disassembly and AssemblyNJS0001P
1. Heater pipe grommet 2. Heater core 3. Heater pipe cover
4. Aspirator 5. Aspirator duct 6. Rear foot cover
7. Max. cool door link 8. Max. cool door lever 9. Ventilator door lever
10. Ventilator door link 11. Air mix door motor 12. Intake sensor
13. Foot duct (right) 14. Evaporator cover 15. Evaporator cover adapter
16. Heater pipe bracket 17. Insulator 18. Heater case (right)
SJIA1897E