2011 INFINITI QX56 belt

CO-18
< REMOVAL AND INSTALLATION >
WATER PUMP
WATER PUMP
Exploded ViewINFOID:0000000006289669
Removal and InstallationINFOID:0000000006289670
CAUTION:
 When removing water pump assembly, be careful not to get engine coolant on drive belts.
 Water pump cannot be disassembled and should be replaced as a unit.
 After installing water pump, co nnect hose and clamp securely, then check for leakage using the radi-
ator cap tester (commercial service tool) and the radiator cap tester adapter (commercial service
tool).
REMOVAL
1. Drain engine coolant from drain plugs on radiator and cylinder block. Refer to CO-8, "Draining" and EM-
103, "Setting".
CAUTION:
 Perform this step when engine is cold.
 Never spill engine coolant on drive belt.
2. Remove front under cover with power tool. Refer to EXT-25, "
Exploded View".
3. Remove fan shroud (lower). Refer to CO-13, "
Exploded View".
4. Move reservoir tank to the position with out the hindrance for work. Refer to CO-13, "
Exploded View".
5. Remove radiator core support cover. Refer to DLK-220, "
Exploded View".
6. Remove fan shroud (upper). Refer to CO-13, "
Exploded View".
7. Remove drive belt. Refer to EM-20, "
Exploded View".
8. Remove cooling fan, fan coupling, cooling fan pulley and bracket. Refer to CO-16, "
Exploded View"
9. Remove radiator hose (upper). Refer to CO-13, "Exploded View".
10. Remove water pump pulley.
1. Water pump pulley 2. Water pump 3. Gasket
Refer to GI-4, "
Components" for symbols in the figure.
JPBIA2316GB
Revision: 2010 May2011 QX56

WATER INLET AND THERMOSTAT ASSEMBLYCO-21
< REMOVAL AND INSTALLATION >
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2. Remove front under cover with power tool. Refer to
EXT-25, "Exploded View".
3. Drain engine coolant from drain plugs on radiator and cylinder block. Refer to CO-8, "
Draining" and EM-
103, "Setting".
CAUTION:
 Perform this step when engine is cold.
 Never spill engine coolant on drive belts.
4. Disconnect radiator hose (upper and lower). Refer to CO-13, "
Exploded View".
5. Remove intake manifold. Refer to EM-30, "
Exploded View".
6. Remove fuel feed tube. Refer to EM-43, "
Exploded View".
7. Remove water hose, water connector, heater pipes and heater hoses.
8. Remove thermostat housing.
9. Remove water inlet and thermostat.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over en gine room. Use rag to absorb engine coolant.
Thermostat
 Install thermostat with the whole circumference of each flange part
(A) fit securely inside rubber ring (1).
 Install thermostat with jiggle valve (A) facing upwards. The position deviation may be within the range of 20 degrees (b).
Water Connector and Heater Pipe
 First apply a neutral detergent to O-rings, then quickly in sert the insertion parts of the water connector and
heater pipe into the installation holes.
InspectionINFOID:0000000006289674
INSPECTION AFTER REMOVAL
 Check that valve in thermostat is co mpletely closing at normal temperature.
PBIC3315J
JPBIA2314ZZ
Revision: 2010 May2011 QX56

DAS-1
CRUISE CONTROL & DRIVER ASSISTANCE
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SECTION DAS
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CONTENTS
DRIVER ASSISTANCE SYSTEM
ADAS CONTROL UNIT
PRECAUTION ................ ..............................
12
PRECAUTIONS .............................................. ....12
Precautions For Harness Repair ......................... ....12
SYSTEM DESCRIPTION .............................13
COMPONENT PARTS ................................... ....13
Component Parts Location .................................. ....13
Component Description ...........................................13
SYSTEM .............................................................14
System Description ............................................. ....14
Fail-safe ..................................................................18
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ..................................................................
20
On Board Diagnosis Function ............................. ....20
CONSULT-III Function (ICC/ADAS) ........................21
ECU DIAGNOSIS INFORMATION ..............31
ADAS CONTROL UNIT .................................. ....31
Reference Value ................................................. ....31
Fail-safe ..................................................................36
DTC Inspection Priority Chart .................................37
DTC Index ...............................................................38
WIRING DIAGRAM ......................................42
DRIVER ASSISTANCE SYSTEMS ................ ....42
Wiring Diagram ................................................... ....42
DTC/CIRCUIT DIAGNOSIS .........................57
C1A00 CONTROL UNIT ................................. ....57
DTC Logic ........................................................... ....57
Diagnosis Procedure ...............................................57
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ............................
58
DTC Logic ............................................................ ....58
Diagnosis Procedure ...............................................58
U1000 CAN COMM CIRCUIT ...........................59
Description ...............................................................59
DTC Logic ................................................................59
Diagnosis Procedure ...............................................59
U1010 CONTROL UNIT (CAN) .........................60
Description ...............................................................60
DTC Logic ................................................................60
Diagnosis Procedure ...............................................60
U150F AV CAN 3 ..............................................61
DTC Logic ................................................................61
Diagnosis Procedure ...............................................61
POWER SUPPLY AND GROUND CIRCUIT ....62
Diagnosis Procedure ...............................................62
REMOVAL AND INSTALLATION ...............63
ADAS CONTROL UNIT ....................................63
Removal and Installation ..................................... ....63
DCA
PRECAUTION ............... ...............................
64
PRECAUTIONS .................................................64
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
64
Precautions For Harness Repair .............................64
DCA System Service ...............................................65
SYSTEM DESCRIPTION .............................66
COMPONENT PARTS ......................................66
Component Parts Location .................................. ....66
Component Description ...........................................67
SYSTEM ............................................................68
System Description .............................................. ....68
Revision: 2010 May2011 QX56

DAS-5
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Description ..........................................................
..
208
Diagnosis Procedure .............................................208
NORMAL OPERATING CONDITION ...............210
Description .......................................................... ..210
REMOVAL AND INSTALLATION .............212
ICC SENSOR .................................................. ..212
Exploded View .................................................... ..212
Removal and Installation .......................................212
ACCELERATOR PEDAL ASSEMBLY ............213
Exploded View .................................................... ..213
DYNAMIC DRIVER ASSISTANCE SWITCH ...214
Exploded View .................................................... ..214
FCW
PRECAUTION ................ ............................
215
PRECAUTIONS .............................................. ..215
Precaution for FCW System Service ................... ..215
SYSTEM DESCRIPTION ...........................216
COMPONENT PARTS ................................... ..216
Component Parts Location .................................. ..216
Component Description .........................................216
SYSTEM ...........................................................218
System Description ............................................. ..218
Fail-safe (ADAS Control Unit) ...............................219
Fail-safe (ICC Sensor) ..........................................220
OPERATION .....................................................221
Switch Name and Function ................................. ..221
Menu Displayed by Pressing Each Switch ............221
HANDLING PRECAUTION ..............................223
Precautions for Forward Collision Warning ......... ..223
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ................................................................
224
On Board Diagnosis Function ............................. ..224
CONSULT-III Function (ICC/ADAS) ......................225
DIAGNOSIS SYSTEM (ICC SENSOR) ............235
CONSULT-III Function (LASER) ...........................235
ECU DIAGNOSIS INFO RMATION ............237
ADAS CONTROL UNIT .................................. ..237
Reference Value ................................................. ..237
Fail-safe ................................................................242
DTC Inspection Priority Chart ...............................243
DTC Index .............................................................244
ICC SENSOR ....................................................248
Reference Value ................................................. ..248
Fail-safe ................................................................249
DTC Inspection Priority Chart ...............................249
DTC Index ........................................................... ..249
WIRING DIAGRAM ....................................251
DRIVER ASSISTANCE SYSTEMS .................251
Wiring Diagram .................................................... ..251
BASIC INSPECTION .................................266
DIAGNOSIS AND REPAIR WORK FLOW .....266
Work Flow ............................................................ ..266
SYMPTOM DIAGNOSIS ............................268
FORWARD COLLISION WARNING SYSTEM
SYMPTOMS ....................................................
268
Symptom Table ................................................... ..268
FCW SYSTEM IS NOT ACTIVATED ..............269
Description .............................................................269
Diagnosis Procedure .............................................269
NORMAL OPERATING CONDITION .............270
Description .............................................................270
REMOVAL AND INSTALLATION .............271
WARNING SYSTEMS SWITCH ......................271
Removal and Installation ..................................... ..271
LDW & LDP
PRECAUTION ............... .............................
272
PRECAUTIONS ...............................................272
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
272
Precautions For Harness Repair ...........................272
Precaution for LDW/LDP System Service .............273
SYSTEM DESCRIPTION ...........................274
COMPONENT PARTS ....................................274
LANE DEPARTURE WARNING (LDW) SYSTEM ..274
LANE DEPARTURE WARNING (LDW) SYSTEM
: Component Parts Location ................................ ..
274
LANE DEPARTURE WARNING (LDW) SYSTEM
: Component Description .......................................
274
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
275
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Component Parts Location .........................
275
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Component Description ..............................
276
SYSTEM ..........................................................277
LANE DEPARTURE WARNING (LDW) SYSTEM ..277
LANE DEPARTURE WARNING (LDW) SYSTEM
: System Description ............................................ ..
277
Revision: 2010 May2011 QX56

DAS-8
U1516 CAM CAN 3 ..........................................385
DTC Logic ............................................................ ..385
Diagnosis Procedure .............................................385
U1520 4WD CAN 3 ..........................................386
DTC Logic ............................................................ ..386
Diagnosis Procedure .............................................386
POWER SUPPLY AND GROUND CIRCUIT ...387
ADAS CONTROL UNIT ......................................... ..387
ADAS CONTROL UNIT : Diagnosis Procedure .....387
LANE CAMERA UNIT ............................................ ..387
LANE CAMERA UNIT : Diagnosis Procedure .......387
WARNING SYSTEMS SWITCH CIRCUIT .......389
Component Function Check ................................ ..389
Diagnosis Procedure .............................................389
Component Inspection ...........................................390
WARNING SYSTEMS ON INDICATOR CIR-
CUIT .................................................................
391
Component Function Check ................................ ..391
Diagnosis Procedure .............................................391
Component Inspection ...........................................392
WARNING BUZZER CIRCUIT .........................393
Component Function Check ................................ ..393
Diagnosis Procedure .............................................393
SYMPTOM DIAGNOSIS ............................395
LDW & LDP SYSTEM SYMPTOMS ............... .395
Symptom Table ................................................... ..395
LANE DEPARTURE WARNING LAMP DOES
NOT TURNED ON ...........................................
397
Description ........................................................... ..397
Diagnosis Procedure .............................................397
LDP ON INDICATOR LAMP DOES NOT
TURNED ON ....................................................
398
Description ........................................................... ..398
Diagnosis Procedure .............................................398
THE SYSTEM OPERATES EVEN WHEN US-
ING TURN SIGNAL .........................................
399
Description ........................................................... ..399
Diagnosis Procedure .............................................399
LDP SYSTEM SETTINGS CANNOT BE
TURNED ON/OFF ON THE NAVIGATION
SCREEN ..........................................................
400
Description ........................................................... ..400
Diagnosis Procedure .............................................400
NORMAL OPERATING CONDITION ..............401
Description ........................................................... ..401
REMOVAL AND INSTALLATION ..............403
LANE CAMERA UNIT .................................... ..403
Removal and Installation ...................................... .403
WARNING SYSTEMS SWITCH .......................404
Removal and Installation ...................................... .404
DYNAMIC DRIVER ASSISTANCE SWITCH ...405
Exploded View ..................................................... .405
WARNING BUZZER .........................................406
Removal and Installation ...................................... .406
BSW
PRECAUTION ............... ............................
407
PRECAUTIONS .............................................. ..407
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
407
Precaution for BSW System Service ....................407
SYSTEM DESCRIPTION ..........................408
COMPONENT PARTS .................................... ..408
Component Parts Location .................................. .408
Component Description ........................................409
SYSTEM ...........................................................410
System Description .............................................. .410
Fail-safe (ADAS Control Unit) ...............................413
Fail-safe (Side Radar) ...........................................414
OPERATION .....................................................415
Switch Name and Function .................................. .415
System Display and Warning ................................415
HANDLING PRECAUTION ............................ ..417
Precautions for Blind Spot Warning ..................... .417
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) .................................................................
418
On Board Diagnosis Function .............................. .418
CONSULT-III Function (ICC/ADAS) .....................419
DIAGNOSIS SYSTEM (SIDE RADAR LH) .......429
CONSULT-III Function (SIDE RADAR LEFT) ...... .429
DIAGNOSIS SYSTEM (SIDE RADAR RH) ......431
CONSULT-III Function (SIDE RADAR RIGHT) ... .431
ECU DIAGNOSIS INFORMATION ............433
ADAS CONTROL UNIT .................................. ..433
Reference Value .................................................. .433
Fail-safe ................................................................438
DTC Inspection Priority Chart ...............................439
DTC Index .............................................................440
SIDE RADAR LH ............................................ ..444
Reference Value .................................................. .444
Fail-safe ................................................................444
DTC Inspection Priority Chart ...............................445
Revision: 2010 May2011 QX56

DAS-64
< PRECAUTION >[DCA]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223495
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006223496
ITS communication uses a twisted pair line. Be careful when repairing it.
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

DAS-272
< PRECAUTION >[LDW & LDP]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223697
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006223698
ITS communication uses a twisted pair line. Be careful when repairing it.
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

DAS
PRECAUTIONSDAS-407
< PRECAUTION > [BSW]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223847
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution for BSW System ServiceINFOID:0000000006223848
WARNING:
Be careful of traffic conditions and safety aro und the vehicle when performing road test.
CAUTION:
 Never perform the active test while driving.
 Never change BSW initial state ON ⇒ OFF without the consent of the customer.
TO KEEP THE BSW SYSTEM OPERATING PROPERLY, BE SURE TO OBSERVE THE FOLLOW-
ING ITEMS:
System Maintenance
The two side radar for the BSW system are located near the rear bumper.
 Always keep the area near the side radar clean.
 Do not attach stickers (including transparent material ), install accessories or apply additional paint near the
side radar.
 Do not strike or damage the area around the side radar.
Revision: 2010 May2011 QX56