check engine NISSAN 350Z 2007 Z33 Automatic Air Conditioner Workshop Manual
[x] Cancel search | Manufacturer: NISSAN, Model Year: 2007, Model line: 350Z, Model: NISSAN 350Z 2007 Z33Pages: 142, PDF Size: 5.44 MB
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ATC-2Revision: 2006 November2007 350Z WORK FLOW ...................................................... 34
SYMPTOM TABLE .............................................. 34
Component Parts and Harness Connector Location ... 35
ENGINE COMPARTMENT .................................. 35
PASSENGER COMPARTMENT .......................... 36
Schematic ............................................................... 37
Wiring Diagram — A/C — ....................................... 38
Auto Amp. Terminals and Reference Value ............ 43
PIN CONNECTOR TERMINAL LAYOUT ............ 43
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ........................ 43
Self-diagnosis Function .......................................... 45
DESCRIPTION .................................................... 45
FUNCTION CONFIRMATION PROCEDURE ...... 46
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 50
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................... 51
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION ................................................. 51
Operational Check .................................................. 53
CHECKING BLOWER ......................................... 53
CHECKING DISCHARGE AIR ............................ 53
CHECKING INTAKE DOOR ................................ 53
CHECKING TEMPERATURE DECREASE ......... 53
CHECKING TEMPERATURE INCREASE .......... 53
CHECKING A/C SWITCH ................................... 53
Power Supply and Ground Circuit for Auto Amp. ... 54
INSPECTION FLOW ........................................... 54
COMPONENT DESCRIPTION ............................ 54
DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 55
LAN System Circuit ................................................ 56
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 56
Mode Door Motor Circuit ........................................ 60
INSPECTION FLOW ........................................... 60
SYSTEM DESCRIPTION .................................... 61
COMPONENT DESCRIPTION ............................ 62
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ............................................................... 62
Air Mix Door Motor Circuit ...................................... 63
INSPECTION FLOW ........................................... 63
SYSTEM DESCRIPTION .................................... 64
COMPONENT DESCRIPTION ............................ 65
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR ... 65
Air Mix Door Motor PBR Circuit .............................. 65
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR ....................................................... 65
Intake Door Motor Circuit ........................................ 66
INSPECTION FLOW ........................................... 66
SYSTEM DESCRIPTION .................................... 67
COMPONENT DESCRIPTION ............................ 68
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ............................................................... 68
Blower Motor Circuit ............................................... 69
INSPECTION FLOW ........................................... 69
SYSTEM DESCRIPTION .................................... 70
COMPONENT DESCRIPTION ............................ 71
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ............................................................... 71COMPONENT INSPECTION ............................... 73
Magnet Clutch Circuit .............................................. 74
INSPECTION FLOW ............................................ 74
SYSTEM DESCRIPTION ..................................... 75
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH .............................................................. 75
COMPONENT INSPECTION ............................... 80
Insufficient Cooling .................................................. 81
INSPECTION FLOW ............................................ 81
PERFORMANCE TEST DIAGNOSIS .................. 83
PERFORMANCE CHART .................................... 85
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE ................................................................... 86
Insufficient Heating ................................................. 89
INSPECTION FLOW ............................................ 89
Noise ....................................................................... 90
INSPECTION FLOW ............................................ 90
Self-diagnosis ......................................................... 91
INSPECTION FLOW ............................................ 91
Ambient Sensor Circuit ........................................... 92
COMPONENT DESCRIPTION ............................ 92
AMBIENT TEMPERATURE INPUT PROCESS ... 92
DIAGNOSIS PROCEDURE FOR AMBIENT
SENSOR .............................................................. 92
COMPONENT INSPECTION ............................... 94
In-vehicle Sensor Circuit ......................................... 94
COMPONENT DESCRIPTION ............................ 94
DIAGNOSIS PROCEDURE FOR IN-VEHICLE
SENSOR .............................................................. 95
COMPONENT INSPECTION ............................... 96
Sunload Sensor Circuit ........................................... 97
COMPONENT DESCRIPTION ............................ 97
SUNLOAD INPUT PROCESS ............................. 97
DIAGNOSIS PROCEDURE FOR SUNLOAD
SENSOR .............................................................. 97
COMPONENT INSPECTION ............................... 99
Intake Sensor Circuit .............................................100
COMPONENT DESCRIPTION ..........................100
DIAGNOSIS PROCEDURE FOR INTAKE SEN-
SOR ...................................................................100
COMPONENT INSPECTION .............................101
A/C CONTROLLER .................................................102
Removal and Installation .......................................102
REMOVAL ..........................................................102
INSTALLATION ..................................................102
Disassembly and Assembly ..................................102
AUTO AMP ..............................................................103
Removal and Installation of Unified Meter and A/C
Amp. ......................................................................103
REMOVAL ..........................................................103
INSTALLATION ..................................................103
AMBIENT SENSOR ................................................104
Removal and Installation .......................................104
REMOVAL ..........................................................104
INSTALLATION ..................................................104
IN-VEHICLE SENSOR ............................................105
Removal and Installation .......................................105
REMOVAL ..........................................................105
INSTALLATION ..................................................105
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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
Page 12 of 142
ATC-12
PRECAUTIONS
Revision: 2006 November2007 350Z
Precautions for Servicing CompressorNJS00007
Plug all openings to prevent moisture and foreign matter from entering.
When the compressor is removed, store it in the same way at it is when mounted on the car.
When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to AT C - 2 1 , "
Maintenance of Lubricant Quantity in Compressor" .
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 normal
operation.
Precautions for Service EquipmentNJS00008
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.
ELECTRICAL LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
VACUUM PUMP
The lubricant contained inside the vacuum pump is not compatible
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
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.
Usually vacuum pumps have a manual isolator valve as part of
the pump. Close this valve to isolate the service hose from the
pump.
For pumps without an isolator, use a hose equipped with a man-
ual shut-off valve near the pump end. Close the valve to isolate
the hose from the pump.
If the hose has 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.
Some one-way valves open when vacuum is applied and close
under no vacuum condition. Such valves may restrict the pump’s
ability to pull a deep vacuum and are not recommended.
MANIFOLD GAUGE SET
Be certain that the gauge face indicates 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
HFC-134a (R-134a) and specified lubricants.
RHA270DA
SHA533D
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LUBRICANT
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LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorNJS0000I
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 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
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
1. CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?
A/C system works properly.
There is no evidence of a large amount of lubricant leakage.
CAUTION:
If excessive lubricant leakage is noted, never perform the lubricant return operation.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS
1. Start the engine, and set to the following conditions:
–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 (REC)
2. Perform lubricant return operation for about 10 minutes.
3. Stop the engine.
>> GO TO 3.
3. CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO AT C - 2 3 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT" .
NO >> GO TO AT C - 2 2 , "
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-
MENT EXCEPT COMPRESSOR" . Name : Nissan A/C System Oil Type S
Page 33 of 142
TROUBLE DIAGNOSIS
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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
Page 46 of 142
ATC-46
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSIS MODE (STEP-1 TO 4)
1. Set the fan control dial to OFF position.
2. Turn ignition switch ON.
3. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press A/C switch for at least 5 seconds.
NOTE:
If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. To avoid this, start engine before
performing this diagnosis.
>> GO TO 2.
2. STEP-1: LEDS ARE CHECKED
Check intake and A/C switch LEDs illumination.
OK >> GO TO 3.
NG >> Refer to AT C - 9 1 , "
Self-diagnosis" .
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
1. Turn fan control dial to AUTO position.
NOTE:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
2. Check A/C switch LED illumination.
Advance to self
-diagnosis STEP-2?
YES >> GO TO 4.
NO >> Replace A/C controller. (Fan control dial is malfunction-
ing.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn fan control dial to OFF position.
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace A/C controller. (Fan control dial is malfunctioning.)
S J I A 1111 E
S J I A 111 2 E
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TROUBLE DIAGNOSIS
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Operational CheckNJS0000X
The purpose of the operational check is to check if the individual system operates properly.
CHECKING BLOWER
1. Turn fan control dial to 1st speed. Blower should operate on low speed.
2. Turn fan control dial to 2nd speed, and continue checking blower speed until all speeds are checked.
3. Leave blower on max. speed.
If NG, go to trouble diagnosis procedure for AT C - 6 9 , "
Blower Motor Circuit" .
If OK, continue the check.
CHECKING DISCHARGE AIR
1. Turn mode control dial to each position.
2. Confirm that discharge air comes out according to the air distri-
bution table. Refer to AT C - 3 0 , "
Discharge Air Flow" .
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for AT C - 6 0 , "
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 D/F, D/F2
or DEF position are selected.
CHECKING INTAKE DOOR
1. Press intake switch. Recirculation LED should illuminate.
2. Press intake switch again. Fresh LED should illuminate.
3. Listen for intake door position change. (Slight change of blower sound can be heard.)
If NG, go to trouble diagnosis procedure for AT C - 6 6 , "
Intake Door Motor Circuit" .
If OK, continue the check.
CHECKING TEMPERATURE DECREASE
1. Turn temperature control dial until 18°C (60°F).
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for AT C - 8 1 , "
Insufficient Cooling" .
If OK, continue the check.
CHECKING TEMPERATURE INCREASE
1. Turn temperature control dial until 32°C (90°F).
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for AT C - 8 9 , "
Insufficient Heating" .
If OK, continue the check.
CHECKING A/C SWITCH
Turn fan control dial to AUTO position. (Compressor is turned ON automatically.)
Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower
speed will depend on ambient, in-vehicle, and set temperatures.)
If NG, go to trouble diagnosis procedure for AT C - 5 4 , "
Power Supply and Ground Circuit for Auto Amp." , then
if necessary, trouble diagnosis procedure for AT C - 7 4 , "
Magnet Clutch Circuit" .
If all operational checks are OK (symptom cannot be duplicated), go to Incident Simulation Tests in GI-27,
"How to Perform Efficient Diagnosis for an Electrical Incident" and perform tests as outlined to simulate driv-
ing conditions environment. If symptom appears, refer to AT C - 3 4 , "
SYMPTOM TABLE" and perform applica-
ble trouble diagnosis procedures.Conditions : Engine running at normal operating temperature
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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.
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ATC-86
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE
Whenever system’s high and/or low side pressure(s) is/are unusual, diagnose using a manifold gauge. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Since the
standard (usual) pressure, however, differs from vehicle to vehicle, refer to above table (Ambient air tempera-
ture-to-operating pressure table).
Both High- and Low-pressure Sides are Too High
High-pressure Side is Too High and Low-pressure Side is Too Low
Gauge indication Refrigerant cycle Probable cause Corrective action
Both high- and low-pressure sides
are too high.The pressure returns to normal
soon after water is splashed on
condenser.Excessive refrigerant charge
in refrigeration cycle.Reduce refrigerant until speci-
fied pressure is obtained.
Air suction by cooling fan is
insufficient.Insufficient condenser cooling
performance.
↓
1. Condenser fins are clogged.
2. Improper fan rotation of
cooling fan.
Clean condenser.
Check and repair cooling
fan as necessary.
Low-pressure pipe is not
cold.
When compressor is
stopped high-pressure value
quickly drops by approxi-
mately 196 kPa (2 kg/cm
2 ,
28 psi). It then decreases
gradually thereafter.Poor heat exchange in con-
denser
(After compressor operation
stops, high-pressure
decreases too slowly.).
↓
Air in refrigeration cycle.Evacuate repeatedly and
recharge system.
Engine tends to overheat.Engine cooling systems mal-
function.Check and repair each engine
cooling system.
An area of the low-pressure
pipe is colder than areas
near the evaporator outlet.
Low-pressure pipe is some-
times covered with frost.
Excessive liquid refrigerant
on low-pressure side.
Excessive refrigerant dis-
charge flow.
Expansion valve is open a
little compared with the
specification.
↓
Improper expansion valve
adjustment.Replace expansion valve.
AC359A
Gauge indication Refrigerant cycle Probable cause Corrective action
High-pressure side is too high and
low-pressure side is too low.
Upper side of condenser and
high-pressure side are hot,
however, liquid tank is not so
hot.High-pressure tube or parts
located between compressor
and condenser are clogged or
crushed.
Check and repair or replace
malfunctioning parts.
Check lubricant for contami-
nation.
AC360A
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TROUBLE DIAGNOSIS
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Revision: 2006 November2007 350Z
Insufficient HeatingNJS00017
SYMPTOM: Insufficient heating
INSPECTION FLOW
*1AT C - 5 3 , "Operational Check"*2ATC-46, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 1.*3ATC-46, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 5 to 7.
*4AT C - 6 3 , "
Air Mix Door Motor Cir-
cuit"
*5ATC-46, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 9.*6ATC-56, "
LAN System Circuit"
*7AT C - 6 9 , "Blower Motor Circuit"*8ATC-63, "Air Mix Door Motor Circuit"*9EC-223, "DTC P0117, P0118 ECT
SENSOR"
*10CO-10, "Changing Engine Coolant"*11CO-15, "Checking Radiator Cap"
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