window INFINITI QX56 2004 Factory Service Manual

-1QUICK REFERENCE INDEX AGENERAL INFORMATIONGIGeneral InformationBENGINEEMEngine MechanicalLUEngine Lubrication SystemCOEngine Cooling SystemECEngine Control SystemFLFuel SystemEXExhaust SystemACCAccelerator Control SystemCTRANSMISSION/
TRANSAXLEATAutomatic TransmissionDDRIVELINE/AXLETFTransferPRPropeller ShaftFFDFront Final DriveRFDRear Final DriveFAXFront AxleRAXRear AxleESUSPENSIONFSUFront SuspensionRSURear SuspensionWTRoad Wheels & TiresFBRAKESBRBrake SystemPBParking Brake SystemBRCBrake Control SystemGSTEERINGPSPower Steering SystemHRESTRAINTSSBSeat BeltsSRSSupplemental Restraint System (SRS)IBODYBLBody, Lock & Security SystemGWGlasses, Window System & MirrorsRFRoofEIExterior & InteriorIPInstrument PanelSESeatAPAdjustable PedalsJAIR CONDITIONERATCAutomatic Air ConditionerKELECTRICALSCStarting & Charging SystemLTLighting SystemDIDriver Information SystemWWWiper, Washer & HornBCSBody Control SystemLANLAN SystemAVAudio Visual, Navigation & Telephone SystemACSAuto Cruise Control SystemPGPower Supply, Ground & Circuit ElementsLMAINTENANCEMAMaintenanceMINDEXIDXAlphabetical IndexEdition: February 2004
Revision: August 2007BDACEFGHIJKLM

ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: August 20072004 QX56
Self-Diagnostic FunctionEKS007PI
WITH CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop vehicle, turn ignition switch OFF, then connect CONSULT-II and CONSULT-II CONVERTER to data
link connector.
3. With engine started, touch “START”, “ICC”, “SELF-DIAG RESULTS” on CONSULT-II screen in this order.
CAUTION:
If “ICC” cannot be shown after several attempts, the ICC unit may be malfunctioning and should
be replaced. Refer to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Self-diagnostic result appears on screen. If “NO DTC ···” is shown, check ICC warning lamp. If any mal-
function is indicated, GO TO step 5.
5. Refer to ACS-36, "
Diagnostic Trouble Code (DTC) Chart" , perform appropriate check, and repair or
replace malfunctioning part as necessary.
6. Turn ignition switch OFF.
7. Start engine and touch “START”, “ICC”, “SELF-DIAG RESULT”, and “ERASE” on CONSULT-II.
CAUTION:
DTC of an existing malfunction will not erase. If the memory does not erase, go to step 5.
8. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC warning
lamp does not illuminate.
WITHOUT CONSULT-II
1. Go to operation check after asking the customer for symptom information. Refer to ACS-9, "ACTION
TEST" .
2. Stop the vehicle to start the self-diagnosis.
3. Turn ignition switch OFF.
4. Turn ignition switch ON, and wait 5 seconds. Press ACCEL/RES
switch 5 times, and then press COAST/SET switch 5 times all
within 5 seconds to start self-diagnosis.
CAUTION:

Do not start the engine.

Do not press the ICC ON/OFF switch ON.

When operation above is not completed within the 5 to 10
second window, DTC will not be displayed.

If self-diagnosis mode cannot be started after several
attempts, the ICC unit may be malfunctioning and should be
replaced. Refer to ACS-34, "
SELF-DIAGNOSIS BY ICC SYS-
TEM DISPLAY WILL NOT RUN" .
5. When self-diagnosis mode is started, DTCs are shown on set vehicle speed indicator.
PKIA0363J
WKIA1921E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-37
[ICC]
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ACS
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DTC 11 CONTROL UNITEKS007X3
1. DIAGNOSTIC CHECK
1. Are any items other than “DTC 11 CONTROL UNIT” indicated on self-diagnosis display?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then perform
self-diagnosis of ICC system again.
NO >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform ICC system running
test. Then perform self-diagnosis of ICC system again.
DTC 12 VDC CONTROL UNITEKS008DH
1. DIAGNOSIS CHECK
With CONSULT-II

Perform self-diagnosis of ABS actuator and electric unit (control unit). Is malfunction indicated?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform ICC system running test. Then per-
form self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK CONNECTOR ICC UNIT AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
1. Turn ignition switch OFF.
2. Disconnect connectors of ICC unit and ABS actuator and electric unit (control unit), and connect them
securely again. Then erase DTC. Then, perform self-diagnosis of ICC system again.
OK or NG
OK >> Poor connector connection. Check connector housing for disconnected, loose, bent and col-
lapsed terminals. If any malfunction is detected, repair applicable part. After repair, erase DTC
and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> GO TO 3.
98 GEAR POSITION××

TCM malfunction

AT turbine revolution sensor mal-
function

AT vehicle speed sensor mal-
functionACS-49
102 LASER STAIN×× ×
ICC sensor body window has
contaminationACS-49
103 LASER SENSOR FAIL×× ×
ICC sensor internal malfunctionACS-50
104 LASER AIMING INCMP×× ×
Laser beam aiming of ICC sensor
is not adjustedACS-50
107 LASER COMM FAIL×× ×

CAN data received by ICC sen-
sor is strange (from ICC unit,
combination meter or ECM)ACS-51
109 LASER HIGH TEMP×× ×
Temperature around ICC sensor
is excessively highACS-51
DTC
No.CONSULT-II screen termsICC sys-
tem
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-vehi-
cle dis-
tance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with pre-
view
function)

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-49
[ICC]
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DTC 98 GEAR POSITIONEKS007XJ
1. DIAGNOSTIC CHECK
With CONSULT-II

Is “DTC 43 VDC/TCS/ABS CIRC” or “DTC 41 VHCL SPEED SE CIRC” indicated in self-diagnosis display
item?
YES or NO
YES >> Repair or replace applicable item. Erase DTC and perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK VEHICLE SPEED SIGNAL
With CONSULT-II

With data monitor, check that “VHCL SPEED SE” is normal.
OK or NG
OK >> GO TO 3.
NG >> Replace ICC unit. Refer to ACS-59, "
ICC Unit" . Erase DTC and perform self-diagnosis of ICC
system again.
3. CHECK SHIFT GEAR POSITION

Check that gear positions are correct in A/T.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. CHECK TCM GEAR POSITION SIGNAL
With CONSULT-II

With TCM data monitor with CONSULT-II, check that gear positions are correct.
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase DTC and perform self-diagnosis of ICC
system again.
NG >>

Perform TCM diagnosis.

After repair, erase DTC and perform self-diagnosis of ICC system again.
5. CHECK TCM TURBINE ROTATION
With CONSULT-II

With TCM diagnosis, check that turbine rpm is normal. Refer to AT-134, "DTC P1716 TURBINE REVOLU-
TION SENSOR" .
OK or NG
OK >> Replace ICC unit. Refer to ACS-59, "ICC Unit" . Erase DTC and perform self-diagnosis of ICC
system again.
NG >>

Perform TCM diagnosis.

After repair, erase DTC and perform self-diagnosis of ICC system again.
DTC 102 LASER STAINEKS007XK
1. VISUAL INSPECTION (1)

Check that there is no contamination and foreign material on ICC sensor body window.
OK or NG
OK >> GO TO 2.
NG >>

Clean ICC sensor.

Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system
again.

ACS-50
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: August 20072004 QX56
2. VISUAL INSPECTION (2)

Check ICC sensor body window for cracks.
OK or NG
OK >> GO TO 3.
NG >>

Replace ICC sensor and adjust laser beam. Refer to ACS-12, "LASER BEAM AIMING
ADJUSTMENT" .

After that, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC
system again.
3. ASK CUSTOMER FOR DRIVING CONDITIONS
1. Is there any trace of contamination or foreign material on ICC sensor?
2. Is there any possibility that vehicle was driven in snow or ICC sensor was frosted?
3. Is there any possibility that ICC sensor was fogged temporarily? (Front window glass may have also been
fogged.)
Ye s o r N o
Yes >> Explain system operation and parameters to customer. System may be operating normally.
No >>

Replace ICC sensor and adjust laser beam aiming. Refer to ACS-59, "ICC Sensor" .

After that, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC
system again.
DTC 103 LASER SENSOR FAILEKS007XL
1. DIAGNOSTIC CHECK

Are “DTC 11 CONTROL UNIT” or “DTC 20 CAN COMM CIRCUIT” item indicated in self-diagnosis display
item?
YES or NO
YES >> GO TO APPLICABLE ITEM INSPECTION. Refer to ACS-37, "DTC 11 CONTROL UNIT" , and
ACS-38, "
DTC 20 CAN COMM CIRCUIT" .
NO >>

Replace ICC sensor and adjust laser beam aiming. Refer to ACS-59, "ICC Sensor" .

After that, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC
system again.
DTC 104 LASER AIMING INCMPEKS007XM
1. DIAGNOSTIC CHECK
1. Adjust laser beam aiming. Refer to ACS-12, "
LASER BEAM AIMING ADJUSTMENT" . Erase DTC and
perform ICC system running test.
2. After that, perform self-diagnosis of ICC system. Is “DTC 104 LASER AIMING INCMP” indicated?
CAUTION:
Ensure that laser beam aiming apparatus is set up accurately.
YES or NO
YES >>
Replace ICC sensor and adjust laser beam aiming. Refer to ACS-59, "ICC Sensor" .

After that, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC
system again.
NO >> Inspection end.

ACS-56
[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: August 20072004 QX56
2. CAN COMMUNICATION INSPECTION
With CONSULT-II
1. With CONSULT-II self-diagnosis, check “CAN COMM CIRCUIT”.
OK or NG
OK >> Refer to ACS-38, "DTC 20 CAN COMM CIRCUIT" .
NG >> Replace combination meter and erase DTC. Refer to DI-25, "
Removal and Installation of Combi-
nation Meter" . Perform ICC system running test, and then perform self-diagnosis of ICC system
again.
Symptom 6: Driving Force Is HuntingEKS007XX
1. CHECK ECM
1. Perform self-diagnosis of ECM.
OK or NG
OK >> Refer to ACS-56, "Symptom 7: The ICC System Frequently Cannot Detect the Vehicle Ahead/The
Detection Zone is Short" .
NG >> After repairing applicable parts, erase DTC. Perform ICC system running test, and then perform
self-diagnosis of ICC system again.
Symptom 7: The ICC System Frequently Cannot Detect the Vehicle Ahead/The
Detection Zone is Short
EKS007XY
The detection function may become unstable in the following cases:

When the reflector of the vehicle ahead is small or not clean enough to reflect the laser.

When driving a road with extremely sharp corners.

When the laser cannot detect the reflector of the vehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
1. VISUAL CHECK
1. Check ICC sensor body window for contamination and foreign materials.
OK or NG
OK >> If any contamination or foreign materials are found, remove them. Then perform ICC system run-
ning test.
NG >> GO TO 2.
2. CHECK FUNCTION
1. After performing laser beam aiming adjustment, perform ICC system running test. Check that preceding
vehicle detection performance has been improved.
OK or NG
OK >> Inspection End.
NG >>

Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-59, "ICC Sen-
sor" .

After performing above, perform ICC system running test, and then perform self-diagnosis of
ICC system again.
Symptom 8: The System Does Not Detect the Vehicle Ahead at AllEKS007XZ
1. VISUAL CHECK
1. With ignition switch turned ON (engine not started), check that all indicator lamps in ICC system display
are continuously lit. (Check for a missing segment in preceding vehicle detection display.)
OK or NG
OK >> GO TO 2.
NG >> Check combination meter. Refer to DI-17, "
How to Proceed With Trouble Diagnosis" .

TROUBLE DIAGNOSIS FOR SYMPTOMS
ACS-57
[ICC]
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2. VISUAL CHECK

Check ICC sensor body window for contamination and foreign materials.
OK or NG
OK >> If any contamination or foreign materials are found, remove them. Perform ICC system running
test. Refer to ACS-9, "
ICC System Running Test" .
NG >> GO TO 3.
3. VISUAL CHECK

Check ICC sensor body window for cracks and scratches.
OK or NG
OK >> GO TO 4.
NG >>

Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-59, "ICC Sen-
sor" .

After performing above, perform ICC system running test, and then perform self-diagnosis of
ICC system again.
4. ADJUST ICC SENSOR

After performing laser beam aiming adjustment, perform ICC system running test. Check that preceding
vehicle detection performance has been improved.
OK or NG
OK >> Inspection End.
NG >>

Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-59, "ICC Sen-
sor" .

After performing above, perform ICC system running test, and then perform self-diagnosis of
ICC system again.

ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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AT C
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 5
Precautions for Working with HFC-134a (R-134a) ..... 5
Contaminated Refrigerant ........................................ 5
General Refrigerant Precautions .............................. 6
Precautions for Leak Detection Dye ......................... 6
A/C Identification Label ............................................ 7
Precautions for Refrigerant Connection ................... 7
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ...................................................... 7
O-RING AND REFRIGERANT CONNECTION ..... 8
Precautions for Servicing Compressor ....................11
Precautions for Service Equipment .........................11
RECOVERY/RECYCLING EQUIPMENT .............11
ELECTRONIC LEAK DETECTOR .......................11
VACUUM PUMP ................................................. 12
MANIFOLD GAUGE SET .................................... 12
SERVICE HOSES ............................................... 12
SERVICE COUPLERS ........................................ 13
REFRIGERANT WEIGHT SCALE ...................... 13
CHARGING CYLINDER ...................................... 13
Wiring Diagrams and Trouble Diagnosis ................ 13
PREPARATION ......................................................... 14
Special Service Tools ............................................. 14
HFC-134a (R-134a) Service Tools and Equipment ... 14
Commercial Service Tools ...................................... 17
REFRIGERATION SYSTEM ..................................... 18
Refrigerant Cycle ................................................... 18
REFRIGERANT FLOW ....................................... 18
Refrigerant System Protection ............................... 18
REFRIGERANT PRESSURE SENSOR ............. 18
PRESSURE RELIEF VALVE .............................. 19
Component Layout ................................................. 20
FRONT REFRIGERATION SYSTEM .................. 20
REAR REFRIGERATION SYSTEM .................... 21LUBRICANT .............................................................. 22
Maintenance of Lubricant Quantity in Compressor ... 22
LUBRICANT ........................................................ 22
CHECKING AND ADJUSTING ............................ 22
AIR CONDITIONER CONTROL ............................... 24
Description .............................................................. 24
Operation ................................................................ 24
AIR MIX DOORS CONTROL .............................. 24
FAN SPEED CONTROL ...................................... 24
INTAKE DOOR CONTROL ................................. 24
MODE DOOR CONTROL ................................... 24
DEFROSTER DOOR CONTROL ........................ 24
MAGNET CLUTCH CONTROL ........................... 25
SELF-DIAGNOSTIC SYSTEM ............................ 25
Description of Control System ................................ 26
Control Operation ................................................... 26
DISPLAY SCREEN .............................................. 27
AUTO SWITCH ................................................... 27
TEMPERATURE DIAL (DRIVER) ........................ 27
TEMPERATURE DIAL (PASSENGER) ............... 27
RECIRCULATION SWITCH () ............................. 27
DEFROSTER () SWITCH .................................... 27
REAR WINDOW DEFOGGER SWITCH ............. 27
OFF SWITCH (HOLD FAN DOWN SWITCH
UNTIL SYSTEM SHUTS OFF) ............................ 27
A/C SWITCH ....................................................... 27
MODE SWITCH .................................................. 27
FRONT FAN SWITCH ......................................... 27
REAR FAN SWITCH (FRONT) ............................ 27
REAR TEMPERATURE/MODE DIAL (FRONT) ... 27
REAR TEMPERATURE/MODE DIAL (REAR) .... 28
REAR FAN CONTROL SWITCH (REAR) ........... 28
Discharge Air Flow ................................................. 29
FRONT ................................................................ 29
REAR .................................................................. 29
System Description (Front) ..................................... 30
CONTROLS AND THEIR FUNCTIONS .............. 30
System Description (Rear) ..................................... 31
CONTROLS AND THEIR FUNCTIONS .............. 31
CAN Communication System Description .............. 32

AIR CONDITIONER CONTROL
ATC-27
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Revision: August 20072004 QX56
DISPLAY SCREEN
Displays the operational status of the system.
AUTO SWITCH

The compressor, intake door, air mix doors, outlet doors and blower speed are automatically controlled so
that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the oper-
ator.
TEMPERATURE DIAL (DRIVER)
Increases or decreases the driver zone temperature.
TEMPERATURE DIAL (PASSENGER)
Increases or decreases the passenger zone temperature.
RECIRCULATION SWITCH ()

When pressed an indicator turns ON in the display, and air inlet is set to recirculation mode.

Recirculation mode is cancelled by pressing the switch again, turning ON the front defroster, pressing the
OFF switch, or pressing the A/C switch to turn off the A/C system and compressor.
DEFROSTER () SWITCH
Positions the air outlet doors to the defrost position. Also positions the intake door to the outside air position.
REAR WINDOW DEFOGGER SWITCH
When switch is ON, rear window is defogged.
OFF SWITCH (HOLD FAN DOWN SWITCH UNTIL SYSTEM SHUTS OFF)
The compressor and blower are OFF, the intake door is set to the outside air position, and the air outlet doors
are set to the foot (75% foot and 25% defrost) position.
A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch when the AUTO switch is ON will turn off the A/C switch and compressor.)
MODE SWITCH
Controls the air discharge outlets.
FRONT FAN SWITCH
Manually controls the blower speed. Seven speeds are available for manual control (as shown on the display
screen).
REAR FAN SWITCH (FRONT)
Manually controls the rear blower speed. Four speeds are available for manual control. When the rear fan
switch (front) is in the off (0) position, the rear blower motor cannot operate. Position (R) allows control of rear
blower speed and rear temperature/mode operation to be transferred to rear air control.
REAR TEMPERATURE/MODE DIAL (FRONT)
Increases or decreases the rear zone temperature and adjusts the mode simultaneously. FLOOR is full hot
setting, FLOOR/PANEL is warm setting, and PANEL is full cold setting.

TROUBLE DIAGNOSIS
ATC-55
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Revision: August 20072004 QX56
SELF-DIAGNOSIS CODE CHART
Code No. Reference page
02 EE changed by calibrationATC-135, "
FRONT AIR CONTROL"
03 Battery voltage out of rangeSC-4, "BATTERY"
04 Mode switch circuit open or shortATC-135, "FRONT AIR CONTROL"
05 Blower motor malfunctionAT C - 8 3 , "Front Blower Motor Circuit"
12 Air mix door motor (Passenger) circuit malfunctionAT C - 7 1 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
20 BCM not responding to A/C requestATC-104, "Magnet Clutch Circuit"
21 BCM not responding to rear defroster requestGW-78, "REAR WINDOW DEFOGGER"
22 Air mix door motor (Driver) circuit malfunctionAT C - 6 9 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
30 In-vehicle sensor circuit out of range (low)
ATC-128, "In-vehicle Sensor Circuit"31 In-vehicle sensor circuit out of range (high)
34 Air mix door motor (Driver) PBR circuit malfunctionAT C - 6 9 , "
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
36Air mix door motor (Passenger) PBR circuit malfunc-
tionAT C - 7 1 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
38 Air mix door motor (rear) circuit malfunctionAT C - 7 3 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (REAR)"
40 Ambient sensor circuit short
ATC-125, "Ambient Sensor Circuit"41 Ambient sensor circuit open
44 In-vehicle sensor motor circuit open
ATC-128, "
In-vehicle Sensor Circuit"46 In-vehicle sensor motor circuit short
50 Optical sensor (Driver) circuit open or short
ATC-131, "
Optical Sensor Circuit"52 Optical sensor (Passenger) circuit open or short
56 Intake sensor circuit short
ATC-133, "
Intake Sensor Circuit"57 Intake sensor circuit open
62 Defroster door motor circuit malfunctionAT C - 7 9 , "
Defroster Door Motor Circuit"
72 Intake door motor circuit malfunctionAT C - 7 6 , "Intake Door Motor Circuit"
80 CAN bus malfunction
LAN-5, "CAN COMMUNICATION"81 CAN BCM message missing
82 Intake door motor circuit malfunctionAT C - 7 6 , "
Intake Door Motor Circuit"
90 Stuck buttonATC-135, "FRONT AIR CONTROL"
92 Mode door motor circuit malfunctionAT C - 6 3 , "Mode Door Motor Circuit"