2005 INFINITI FX35 check engine

TRANSMISSION ASSEMBLY AT-277
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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 3 ,
"COMPONENTS (FOR VQ35DE)" or AT- 2 7 4 , "COMPONENTS
(FOR VK45DE)" .
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.

After converter is installed to drive plate, rotate crankshaft several turns and check to be sure that
transmission rotates freely without binding.

Install crankshaft position sensor (POS). Refer to EM-30, "Removal and Installation (2WD Model)" , EM-
185, "Removal and Installation" .

After completing installation, check A/T fluid leakage, A/T fluid level, and the positions of A/T. Refer to AT-
12, "Changing A/T Fluid" , AT- 2 3 5 , "Adjustment of A/T Position" , AT- 2 3 5 , "Checking of A/T Position" .
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ATC-2Revision: 2005 July 2005 FX
MODE SWITCH ................................................
... 35
FAN SWITCH ................................................... ... 35
DUAL SWITCH (WITH LEFT AND RIGHT VEN-
TILATION TEMPERATURE SEPARATELY
CONTROL SYSTEM) ....................................... ... 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 (BCM) ............................... ... 40
CONSULT-II BASIC OPERATION .................... ... 40
DATA MONITOR ............................................... ... 41
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 42
WORK FLOW ................................................... ... 42
SYMPTOM TABLE ........................................... ... 42
Component Parts and Harness Connector Location ... 43
ENGINE COMPARTMENT ............................... ... 43
PASSENGER COMPARTMENT ....................... ... 44
Schematic ............................................................ ... 45
Wiring Diagram —A/C— ...................................... ... 46
Auto Amp. Terminals and Reference Value ......... ... 51
PIN CONNECTOR TERMINAL LAYOUT ......... ... 51
TERMINALS AND REFERENCE VALUE FOR
UNIFIED METER AND A/C AMP. ..................... ... 51
Self-diagnosis Function ....................................... ... 53
DESCRIPTION ................................................. ... 53
FUNCTION CONFIRMATION PROCEDURE ... ... 54
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................ ... 59
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................ ... 60
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION .............................................. ... 60
Operational Check ............................................... ... 61
CHECKING MEMORY FUNCTION .................. ... 61
CHECKING BLOWER ...................................... ... 61
CHECKING DISCHARGE AIR ......................... ... 61
CHECKING INTAKE AIR .................................. ... 62
CHECKING TEMPERATURE DECREASE ...... ... 62
CHECKING TEMPERATURE INCREASE ....... ... 62
CHECK A/C SWITCH ....................................... ... 62
CHECKING AUTO MODE ................................ ... 63
Power Supply and Ground Circuit for Auto Amp. ... 63 INSPECTION FLOW ........................................ ... 63
COMPONENT DESCRIPTION ......................... ... 64
DIAGNOSIS PROCEDURE FOR A/C SYSTEM ... 64
LAN System Circuit ............................................. ... 66
DIAGNOSIS PROCEDURE FOR LAN CIRCUIT ... 66
Mode Door Motor Circuit ..................................... ... 70
INSPECTION FLOW ........................................ ... 70
SYSTEM DESCRIPTION ................................. ... 71
COMPONENT DESCRIPTION ......................... ... 72
DIAGNOSIS PROCEDURE FOR MODE DOOR
MOTOR ............................................................ ... 72
Air Mix Door Motor Circuit ................................... ... 73
INSPECTION FLOW ........................................ ... 73 SYSTEM DESCRIPTION ..................................
... 74
COMPONENT DESCRIPTION ......................... ... 75
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR ............................................................. ... 75
Air Mix Door Motor PBR Circuit ........................... ... 75
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR
MOTOR PBR .................................................... ... 75
Intake Door Motor Circuit ..................................... ... 76
INSPECTION FLOW ......................................... ... 76
SYSTEM DESCRIPTION .................................. ... 77
COMPONENT DESCRIPTION ......................... ... 78
DIAGNOSIS PROCEDURE FOR INTAKE DOOR
MOTOR ............................................................. ... 78
Blower Motor Circuit ............................................. ... 79
INSPECTION FLOW ......................................... ... 79
SYSTEM DESCRIPTION .................................. ... 80
COMPONENT DESCRIPTION ......................... ... 81
DIAGNOSIS PROCEDURE FOR BLOWER
MOTOR ............................................................. ... 81
COMPONENT INSPECTION ............................ ... 83
Magnet Clutch Circuit ........................................... ... 84
INSPECTION FLOW ......................................... ... 84
SYSTEM DESCRIPTION .................................. ... 85
DIAGNOSIS PROCEDURE FOR MAGNET
CLUTCH ........................................................... ... 85
COMPONENT INSPECTION ............................ ... 90
Insufficient Cooling ............................................... ... 91
INSPECTION FLOW ......................................... ... 91
PERFORMANCE TEST DIAGNOSIS ............... ... 93
PERFORMANCE CHART ................................. ... 95
TROUBLE DIAGNOSIS FOR UNUSUAL PRES-
SURE ................................................................ ... 96
DIAGNOSIS PROCEDURE FOR INSUFFI-
CIENT COOLING .............................................. ... 98
Insufficient Heating .............................................. .100
INSPECTION FLOW ......................................... .100
Noise .................................................................... .101
INSPECTION FLOW ......................................... .101
Self-diagnosis ...................................................... .102
INSPECTION FLOW ......................................... .102
Memory Function ................................................. .103
INSPECTION FLOW ......................................... .103
Ambient Sensor Circuit ........................................ .104
COMPONENT DESCRIPTION ......................... .104
AMBIENT TEMPERATURE INPUT PROCESS .104
DIAGNOSIS PROCEDURE FOR AMBIENT
SENSOR ........................................................... .104
COMPONENT INSPECTION ............................ .106
In-vehicle Sensor Circuit ...................................... .107
COMPONENT DESCRIPTION ......................... .107
DIAGNOSIS PROCEDURE FOR IN-VEHICLE
SENSOR ........................................................... .108
COMPONENT INSPECTION ............................ .109
Sunload Sensor Circuit ........................................ .110
COMPONENT DESCRIPTION ......................... .110
SUNLOAD INPUT PROCESS .......................... .110
DIAGNOSIS PROCEDURE FOR SUNLOAD
SENSOR ........................................................... .110

ATC-4Revision: 2005 July 2005 FX
REMOVAL ........................................................
.157
INSTALLATION ................................................. .157
Checking for Refrigerant Leaks ........................... .158
Checking System for Leaks Using the Fluorescent
Leak Detector ...................................................... .158
Dye Injection ........................................................ .158
Electronic Refrigerant Leak Detector ................... .159
PRECAUTIONS FOR HANDLING LEAK DETECTOR ......................................................
.159
CHECKING PROCEDURE ............................... .160
SERVICE DATA AND SPECIFICATIONS (SDS) ... .162
Compressor ......................................................... .162
Lubricant .............................................................. .162
Refrigerant ........................................................... .162
Engine Idling Speed ............................................. .162
Belt Tension ......................................................... .162

PRECAUTIONS ATC-13
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Revision: 2005 July 2005 FX

After connecting line, perform leak test and make sure that there is no leakage from connections.
When the refrigerant leaking point is found, disconnect that line and replace the O-ring. Then
tighten connections of seal seat to the specified torque.
Precautions for Servicing CompressorAJS001XM

Plug all openings to prevent moisture and foreign matter from entering.

When the compressor is removed, store it in the same way as 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 7 , "
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 EquipmentAJS001XN
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.
RHA861F

LUBRICANT ATC-27
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Revision: 2005 July 2005 FX
LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorAJS00149
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 engine, and set 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 engine.
>> GO TO 3.
3. CHECK REPLACEMENT PART
Should the compressor be replaced?
YES >> GO TO AT C - 2 9 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT" .
NO >> GO TO AT C - 2 8 , "
LUBRICANT ADJUSTING PROCEDURE FOR COMPONENTS REPLACE-
MENT EXCEPT COMPRESSOR" .
Name : NISSAN A/C System Oil Type S
Part number : KLH00-PAGS0

ATC-54
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
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 (UP) switch (driver side).
Advance to self
-diagnosis STEP-3?
YES >> GO TO 4.
NO >> Replace A/C and AV switch. (Temperature dial malfunctions.)
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-2
Press temperature (DOWN) switch (driver side).
Return to self
-diagnosis STEP-2?
YES >> GO TO 5.
NO >> Malfunctioning OFF switch or unified meter and A/C amp. Refer to ATC-102, "
Self-diagnosis" .
5. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
Press temperature (UP) switch (driver side).
Does code No. 30 appear on the display?
YES >> GO TO 6.
NO >> GO TO 14.
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TROUBLE DIAGNOSIS ATC-61
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Operational CheckAJS0014Q
The purpose of the operational check is to check if the individual system operates properly.
CHECKING MEMORY FUNCTION
1. Set the temperature to 32°C (90 °F).
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 tempera- ture.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for ATC-103, "
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 AT C - 7 9 , "
Blower Motor
Circuit" .
If OK, continue the check.
CHECKING DISCHARGE AIR
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 distri- bution table. Refer to AT C - 3 7 , "
Discharge Air Flow" .
If NG, go to trouble diagnosis procedure for AT C - 7 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 or
DEF is selected. Conditions : Engine running at normal operating temperature
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ATC-88
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
8. CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start the engine.
2. Check voltage of refrigerant pressure sensor. Refer to EC-147, "
CONSULT-II Reference Value in Data
Monitor" (VQ35DE) or EC-838, "CONSULT-II Reference Value in Data Monitor" (VK45DE).
WITHOUT CONSULT-II
1. Start the engine.
2. Check voltage between ECM harness connector F101 terminal 70 (L/R) and ground.
OK or NG
OK >>
WITH CONSULT-II
GO TO 9.

WITHOUT CONSULT-II
GO TO 10.
NG >> Refer to EC-674, "
REFRIGERANT PRESSURE SENSOR" (VQ35DE) or EC-1364, "REFRIGER-
ANT PRESSURE SENSOR" (VK45DE).
9. CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer to AT C - 4 0 , "
CONSULT-II 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 M3 terminal 28 (BR/Y) and unified meter and A/C amp. harness connector
M57 terminal 57 (BR/Y).
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
Te r m i n a l s
Condition Voltage
(+)
( − )
ECM
connector Terminal No.
(wire color)
F101 70 (L/R) Ground A/C switch: ON
(Blower motor operates.) Approx. 1 - 4 V
PBIB1188E
FAN SW ON : FAN ON SIG ON
FAN SW OFF : FAN ON SIG OFF
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28 – 57 : Continuity should exist.
RJIA2009E