check engine INFINITI M35 2006 Factory Service Manual

TRANSMISSION ASSEMBLY
AT-275
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Revision: 2006 January2006 M35/M45
Install crankshaft position sensor (POS). Refer to EM-29, "Removal and Installation (2WD Models)" (for
VQ35DE engine), EM-187, "
Removal and Installation" (for VK45DE engine).
After completing installation, check A/T fluid leakage, A/T fluid level and A/T position. Refer to AT- 1 3 ,
"Checking A/T Fluid" , AT-228, "Checking of A/T Position" .
Removal and Installation (AWD Models) NCS001QZ
COMPONENTS
REMOVAL
CAUTION:
When removing the A/T assembly from engine, first remove the crankshaft position sensor (POS)
from the A/T assembly.
Be careful not to damage sensor edge.
1. Disconnect the battery cable from the negative terminal.
2. Remove engine under cover with power tool.
3. Remove A/T fluid level gauge.
4. Remove exhaust front tube and center muffler and with power tool. Refer to EX-5, "
Removal and Installa-
tion" .
1. A/T assembly 2. A/T fluid level gauge 3. A/T fluid charging pipe
4. O-ring 5. Copper washer 6. Fluid cooler tube
7. Bracket 8. Heat insulator 9. Rear engine mounting member
10. Engine mounting insulator (rear)
Refer to GI section to make sure icons (symbol marks) in the figure. Refer to GI-11, "
Components" .
However, refer to the following symbols for others.
:For tightening torque, refer to AT-277, "
INSTALLATION" .
SCIA6753E

TRANSMISSION ASSEMBLY
AT-277
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Revision: 2006 January2006 M35/M45
INSPECTION
Installation and Inspection of Torque Converter
After inserting a torque converter to a A/T, be sure to check dis-
tance “A” to ensure it is within the reference value limit.
INSTALLATION
Install the removed parts in the reverse order of the removal, while paying attention to the following work.
When installing A/T assembly to the engine assembly, attach the
fixing bolts in accordance with the following standard.
Align the positions of tightening bolts for drive plate with those of
the torque converter, and temporarily tighten the bolts. Then,
tighten the bolts with the specified torque. Refer to AT- 2 7 5 ,
"COMPONENTS" .
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
When tightening the tightening bolts for the torque con-
verter after fixing the crankshaft pulley bolts, be sure to
confirm the tightening torque of the crankshaft pulley
mounting bolts. Refer to EM-72, "
INSTALLATION" .
After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that A/T rotates freely without binding.
Install crankshaft position sensor (POS). Refer to EM-36, "Removal and Installation (AWD Models)" .
After completing installation, check A/T fluid leakage, A/T fluid level and A/T position. Refer to AT- 1 3 ,
"Checking A/T Fluid" , AT-228, "Checking of A/T Position" . Distance “A”: 25.0 mm (0.98 in) or more
SCIA5694E
Bolt No. 1 2 3 4
Number of bolts 1 5 2 1
Bolt length
“ ”mm (in)55 (2.17) 65 (2.56) 35 (1.38) 40 (1.57)
Tightening torque
Nꞏm (kg-m, ft-lb)75
(7.7, 55)47
(4.8, 35)34
(3.5, 25)
SCIA4600E
SCIA2288E

ATC-2Revision: 2006 January2006 M35/M45 AUTO SWITCH ................................................... 34
DEFROSTER (DEF) SWITCH ............................. 34
UPPER VENT SWITCH ...................................... 34
A/C SWITCH ....................................................... 35
FAN SWITCHES .................................................. 35
OFF SWITCH ...................................................... 35
REAR WINDOW DEFOGGER SWITCH ............. 35
INTAKE SWITCH ................................................. 35
DUAL SWITCH .................................................... 35
Control Operation (Rear Control Switch) ................ 35
AUTO SWITCH ................................................... 35
FAN SWITCH ...................................................... 35
REAR TEMPERATURE CONTROL SWITCH ..... 35
Fail-Safe Function .................................................. 36
Discharge Air Flow ................................................. 37
System Description ................................................. 38
SWITCHES AND THEIR CONTROL FUNCTION ... 38
CAN Communication System Description .............. 39
TROUBLE DIAGNOSIS ............................................ 40
CONSULT-II Function (ECM) .................................. 40
CONSULT-II BASIC OPERATION ....................... 40
DATA MONITOR .................................................. 40
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 40
WORK FLOW ...................................................... 40
SYMPTOM TABLE .............................................. 41
Component Parts and Harness Connector Location ... 42
ENGINE COMPARTMENT .................................. 42
PASSENGER COMPARTMENT .......................... 43
Schematic ............................................................... 44
Wiring Diagram —A/C— ......................................... 46
Auto Amp. Terminals and Reference Value ............ 53
PIN CONNECTOR TERMINAL LAYOUT ............ 53
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ........................ 53
Self-diagnosis Function .......................................... 55
DESCRIPTION .................................................... 55
FUNCTION CONFIRMATION PROCEDURE ...... 56
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 62
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................... 63
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION ................................................. 63
Operational Check .................................................. 64
CHECKING MEMORY FUNCTION ..................... 64
CHECKING BLOWER ......................................... 64
CHECKING DISCHARGE AIR (MODE SWITCH
AND DEF SWITCH) ............................................ 64
CHECKING DISCHARGE AIR (UPPER VENT
SWITCH) ............................................................. 65
CHECKING INTAKE AIR ..................................... 65
CHECKING TEMPERATURE DECREASE ......... 65
CHECKING TEMPERATURE INCREASE .......... 65
CHECKING A/C SWITCH ................................... 65
CHECKING AUTO MODE ................................... 65
Power Supply and Ground Circuit for Auto Amp. ... 66
INSPECTION FLOW ........................................... 66
COMPONENT DESCRIPTION ............................ 67DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 67
Rear Control Switch Circuit ..................................... 69
DIAGNOSIS PROCEDURE FOR REAR CON-
TROL SWITCH .................................................... 69
LAN System Circuit ................................................. 70
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 70
Mode Door Motor Circuit ......................................... 75
INSPECTION FLOW ............................................ 76
SYSTEM DESCRIPTION ..................................... 78
COMPONENT DESCRIPTION ............................ 79
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ................................................................ 79
Upper Ventilator Door Motor Circuit ........................ 80
INSPECTION FLOW ............................................ 80
SYSTEM DESCRIPTION ..................................... 81
COMPONENT DESCRIPTION ............................ 82
DIAGNOSIS PROCEDURE FOR UPPER VEN-
TILATOR DOOR MOTOR .................................... 82
Air Mix Door Motor Circuit ....................................... 83
INSPECTION FLOW ............................................ 83
SYSTEM DESCRIPTION ..................................... 84
COMPONENT DESCRIPTION ............................ 85
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR ................................................................ 85
Air Mix Door Motor PBR Circuit .............................. 85
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR ....................................................... 85
Intake Door Motor Circuit ........................................ 86
INSPECTION FLOW ............................................ 86
SYSTEM DESCRIPTION ..................................... 87
COMPONENT DESCRIPTION ............................ 88
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ................................................................ 88
Blower Motor Circuit ................................................ 89
INSPECTION FLOW ............................................ 89
SYSTEM DESCRIPTION ..................................... 90
COMPONENT DESCRIPTION ............................ 91
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ................................................................ 91
COMPONENT INSPECTION ............................... 93
Magnet Clutch Circuit .............................................. 94
INSPECTION FLOW ............................................ 94
SYSTEM DESCRIPTION ..................................... 95
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH .............................................................. 95
COMPONENT INSPECTION ............................... 98
Insufficient Cooling .................................................. 99
INSPECTION FLOW ............................................ 99
PERFORMANCE TEST DIAGNOSIS ................101
PERFORMANCE CHART ..................................103
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE .................................................................105
DIAGNOSIS PROCEDURE FOR INSUFFI-
CIENT COOLING ...............................................107
Insufficient Heating ...............................................109
INSPECTION FLOW ..........................................109
Noise .....................................................................110
INSPECTION FLOW ..........................................110
Self-Diagnosis ....................................................... 111

ATC-3
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Revision: 2006 January2006 M35/M45 INSPECTION FLOW ......................................... . 111
Memory Function .................................................. 112
INSPECTION FLOW .......................................... 112
Ambient Sensor Circuit ......................................... 113
COMPONENT DESCRIPTION .......................... 113
AMBIENT TEMPERATURE INPUT PROCESS .. 113
DIAGNOSIS PROCEDURE FOR AMBIENT
SENSOR ............................................................ 113
COMPONENT INSPECTION ............................. 115
In-Vehicle Sensor Circuit ....................................... 116
COMPONENT DESCRIPTION .......................... 116
DIAGNOSIS PROCEDURE FOR IN-VEHICLE
SENSOR ............................................................ 117
COMPONENT INSPECTION ............................. 118
Sunload Sensor Circuit ......................................... 119
COMPONENT DESCRIPTION .......................... 119
SUNLOAD INPUT PROCESS ........................... 119
DIAGNOSIS PROCEDURE FOR SUNLOAD
SENSOR ............................................................ 119
COMPONENT INSPECTION ............................121
Intake Sensor Circuit ............................................122
COMPONENT DESCRIPTION .........................122
DIAGNOSIS PROCEDURE FOR INTAKE SEN-
SOR ..................................................................122
COMPONENT INSPECTION ............................123
CONTROLLER .......................................................124
Removal and Installation of Multifunction Switch . 124
REMOVAL ........................................................
.124
INSTALLATION .................................................124
AUTO AMP .............................................................125
Removal and Installation of Unified Meter and A/C
Auto Amp. ............................................................125
REMOVAL ........................................................
.125
INSTALLATION .................................................125
AMBIENT SENSOR ................................................126
Removal and Installation ......................................126
REMOVAL ........................................................
.126
INSTALLATION .................................................126
IN-VEHICLE SENSOR ............................................127
Removal and Installation ......................................127
REMOVAL ........................................................
.127
INSTALLATION .................................................127
SUNLOAD SENSOR ..............................................128
Removal and Installation ......................................128
REMOVAL ........................................................
.128
INSTALLATION .................................................128
INTAKE SENSOR .................................................. .129
Removal and Installation ......................................129
REMOVAL ........................................................
.129
INSTALLATION .................................................129
BLOWER UNIT .......................................................130
Removal and Installation ......................................130
REMOVAL ........................................................
.130
INSTALLATION .................................................130
Disassembly and Assembly .................................131
BLOWER MOTOR ..................................................132
Removal and Installation ......................................132
REMOVAL ........................................................
.132
INSTALLATION .................................................132INTAKE DOOR MOTOR .........................................133
Removal and Installation ......................................133
REMOVAL ........................................................
.133
INSTALLATION .................................................133
IN-CABIN MICROFILTER .......................................134
Removal and Installation ......................................134
FUNCTION .......................................................
.134
REPLACEMENT TIMING ..................................134
REPLACEMENT PROCEDURES .....................134
HEATER & COOLING UNIT ASSEMBLY ...............135
Removal and Installation ......................................135
REMOVAL ........................................................
.135
INSTALLATION .................................................136
Disassembly and Assembly ..................................138
MODE DOOR MOTOR ............................................140
Removal and Installation ......................................140
REMOVAL ........................................................
.140
INSTALLATION .................................................140
AIR MIX DOOR MOTOR .........................................141
Removal and Installation ......................................141
REMOVAL ........................................................
.141
INSTALLATION .................................................141
UPPER VENTILATOR DOOR MOTOR ..................142
Removal and Installation ......................................142
REMOVAL ........................................................
.142
INSTALLATION .................................................142
HEATER CORE .......................................................143
Removal and Installation ......................................143
REMOVAL ........................................................
.143
INSTALLATION .................................................143
DUCTS AND GRILLES ...........................................144
Removal and Installation ......................................144
COMPONENT LAYOUT ....................................144
REMOVAL ........................................................
.146
INSTALLATION .................................................150
REFRIGERANT LINES ...........................................151
HFC-134a (R-134a) Service Procedure ...............151
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ................................................................151
Components ....................................................
.....153
VQ35DE ............................................................153
VK45DE .............................................................154
Removal and Installation of Compressor ..............155
REMOVAL ........................................................
.155
INSTALLATION .................................................157
Check Disc to Pulley Clearance ...........................157
Removal and Installation of Low-Pressure Flexible
Hose and Pipe ......................................................158
REMOVAL ........................................................
.158
INSTALLATION .................................................158
Removal and Installation of High-Pressure Flexible
Hose .....................................................................159
REMOVAL ........................................................
.159
INSTALLATION .................................................160
Removal and Installation of High-Pressure Pipe 1
(Engine Compartment) .........................................160
REMOVAL ........................................................
.160
INSTALLATION .................................................161
Removal and Installation of Low-Pressure Pipe 1

ATC-4Revision: 2006 January2006 M35/M45 and High-Pressure Pipe 2 ....................................162
REMOVAL ........................................................
.162
INSTALLATION ..................................................163
Removal and Installation of Liquid Tank ...............164
DISASSEMBLY AND ASSEMBLY ....................164
REMOVAL ........................................................
.164
INSTALLATION ..................................................165
Removal and Installation of Condenser ................165
REMOVAL ........................................................
.165
INSTALLATION ..................................................167
Removal and Installation of Refrigerant Pressure
Sensor ..................................................................167
REMOVAL ........................................................
.167
INSTALLATION ..................................................167
Removal and Installation of Evaporator ................168
REMOVAL ........................................................
.168
INSTALLATION ..................................................168Removal and Installation of Expansion Valve .......169
REMOVAL ..........................................................169
INSTALLATION ..................................................169
Checking for Refrigerant Leaks ............................170
Checking System for Leaks Using the Fluorescent
Leak Detector ........................................................170
Dye Injection .........................................................170
Electrical Refrigerant Leak Detector .....................171
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................171
CHECKING PROCEDURE ................................172
SERVICE DATA AND SPECIFICATIONS (SDS) ....174
Compressor ..........................................................174
Lubricant ...............................................................174
Refrigerant ............................................................174
Engine Idling Speed ..............................................174
Belt Tension ..........................................................174

PRECAUTIONS
ATC-13
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Revision: 2006 January2006 M35/M45
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 EquipmentNJS000FU
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

ATC-26
LUBRICANT
Revision: 2006 January2006 M35/M45
LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorNJS000G3
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 30C (77 to 86F).]
–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 7 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT" .
NO >> GO TO AT C - 2 7 , "
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-
MENT EXCEPT COMPRESSOR" . Name : Nissan A/C System Oil Type S

ATC-40
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
TROUBLE DIAGNOSISPFP:00004
CONSULT-II Function (ECM)NJS000GD
CONSULT-II can display each diagnosis item using the diagnosis test modes shown following.
CONSULT-II BASIC OPERATION
Refer to GI-39, "CONSULT-II Start Procedure" .
DATA MONITOR
Operation Procedure
1. Touch “ENGINE” on “SELECT SYSTEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch either “ALL SIGNALS” or “SELECTION FROM MENU” on “DATA MONITOR” screen.
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 monitored item can be recorded. To stop
recording, touch “STOP”.
Display Item List
How to Perform Trouble Diagnosis for Quick and Accurate RepairNJS000GE
WORK FLOW
System part Check item, diagnosis mode Description
ECM Data monitor Displays ECM input data in real time.
All signals Monitors all the items.
Selection from menu Selects and monitors the individual item selected.
Monitor item name
“operation or unit”Contents
IGN ON SW “ON/OFF” Displays “IGN position (ON)/OFF, ACC position (OFF)” status as judged from ignition switch signal.
FAN ON SIG “ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal.
AIR COND SW “ON/OFF” Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.
REFRIGERANT
PRESSURE SEN-
SOR “V”Displays “Refrigerant pressure sensor for voltage” status as inputted from refrigerant pressure sen-
sor.
*1ATC-64, "Operational Check"
SHA900E

ATC-56
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSIS MODE
1. Turn ignition switch ON.
2. Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
CAUTION:
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.
Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis func-
tion.
>> GO TO 2.
2. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
Does code No. 20 appear on the display?
YES >> GO TO 3.
NO >> GO TO 13.
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3
Press temperature control (UP) switch (driver side).
Advance to self
-diagnosis STEP-3?
YES >> GO TO 4.
NO >> Replace Multifunction switch. (Temperature control switch is malfunctioning.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2
Press temperature control (DOWN) switch (driver side).
Return to self
-diagnosis STEP-2?
YES >> GO TO 5.
NO >> Malfunctioning multifunction switch or unified meter and A/C amp. Refer to AT C - 111 , "
Self-Diag-
nosis" .
5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Press temperature control (UP) switch (driver side).
Does code No. 30 appear on the display?
YES >> GO TO 6.
NO >> GO TO 14.
RJIA0219E
RJIA0220E

ATC-64
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Operational CheckNJS000GK
The purpose of the operational check is to check if the individual system operates properly.
CHECKING MEMORY FUNCTION
1. Press the temperature control (UP) switch (driver side) until 32C (90F) is displayed.
2. Press OFF switch.
3. Turn ignition switch OFF.
4. Turn ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous temperature.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for ATC-112, "
Memory Function" .
If OK, continue the check.
CHECKING BLOWER
1. Press fan (UP:+) switch. Blower should operate on low speed. The fan symbol should have one blade lit.
2. Press fan (UP:+) switch again, and continue checking blower speed and fan symbol until all speeds are
checked.
3. Leave blower on max. speed.
If NG, go to trouble diagnosis procedure for ATC-89, "
Blower Motor Circuit" .
If OK, continue the check.
CHECKING DISCHARGE AIR (MODE SWITCH AND DEF SWITCH)
1. Press MODE switch and DEF switch.
2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distribution table. Refer to AT C - 3 7 , "
Discharge
Air Flow" .
If NG, go to trouble diagnosis procedure for ATC-75, "
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 or DEF is selected.Conditions : Engine running at normal operating temperature
RJIA4035E