2007 INFINITI QX56 power steering

POWER STEERING GEAR AND LINKAGE
PS-19
< SERVICE INFORMATION >
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• Apply a load of 490 N (50 kg-f, 110 lb-f) to the ball stud axially. Use
a dial gauge to measure the amount of the movement that the stud
makes. If the value is outside the specification, replace the sock-
ets.
ASSEMBLY
1. Install the inner sockets.
2. Install the large-diameter side of the boots to the gear housing
assembly.
3. Install the small-diameter side of the boots to the groove of the
inner sockets.
4. Install the boot clamps to the boots, as shown.
CAUTION:
Do not reuse the large-diameter boot clamps.Outer socket : 0.5 mm (0.020 in) or less
Inner socket : 0.2 mm (0.008 in) or less
SGIA0057E
SGIA0550E
AST139

PS-20
< SERVICE INFORMATION >
POWER STEERING GEAR AND LINKAGE
5. Crimp the large-diameter boot clamps, using Tool.
6. Install the cylinder tubes to the gear housing assembly.
7. Install the lock nuts and outer sockets to the inner sockets.
8. Thread the outer sockets onto the inner sockets to the specified
length "L", then tighten the lock nuts to the specification. Refer to
PS-15, "
Removal and Installation". Reconfirm that the tie-rod
length "L" is within specification.Tool number : KV40107300 ( — )
RAC1133D
Maximum inner socket
length "L": 115.2 mm (4.54 in)
SGIA0167E

POWER STEERING OIL PUMP
PS-21
< SERVICE INFORMATION >
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POWER STEERING OIL PUMP
On-Vehicle Inspection and ServiceINFOID:0000000003532831
CHECKING RELIEF OIL PRESSURE
CAUTION:
Before starting work, confirm belt tension is proper.
1. Connect Tool between oil pump discharge connector and high
pressure hose and then bleed air from the hydraulic circuit.
2. Start engine. Allow engine to run until tank temperature reaches 50 – 80°C (122 – 176°F).
CAUTION:
• Warm up engine with shut-off valve fully opened. If engine is started with shut-off valve closed,
fluid pressure in power steering pump increases to maximum. This will raise fluid temperature
excessively.
• Be careful not to contact hose with belt when engine is started.
3. With engine at idle, close shut-off valve and read the relief oil pressure.
CAUTION:
Do not close shut-off valve of pressure gauge for more than 10 seconds.
4. After measurement, open shut-off valve slowly.
• If relief oil pressure is outside the specification, repair or replace oil pump. Refer to PS-22, "
Disassembly
and Assembly" .
5. After inspection, disconnect oil pressure gauge and oil pressure gauge adapter from hydraulic circuit, con-
nect oil pump discharge connector and high pressure hose. Add fluid and bleed air from hydraulic circuit
thoroughly. Refer to PS-6, "
Air Bleeding Hydraulic System" .
Removal and InstallationINFOID:0000000003532832
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove engine room cover. Refer to EM-12, "
Removal and Installation" .
3. Remove air duct assembly. Refer to EM-15, "
Removal and Installation" .
4. Remove power steering reservoir tank.
5. Remove serpentine drive belt belt from auto tensioner and power steering pump. Refer to EM-13,
"Removal and Installation" .
6. Disconnect pressure sensor electrical connector.
7. Remove high pressure and low pressure piping from power steering oil pump. Refer to PS-23
.
8. Remove mounting bolts, then remove power steering pump.
INSTALLATION
Installation is in the reverse order of removal. Refer to PS-23 for tightening torque.
Tool number:
Pressure gauge and shut-off valveKV48103500
(J26357 and J26357-10)
Oil pump sideConnector A and O-
ringKV48105300-4 and 5295262U10
(—)
Eye-bolt and O-ringKV48105300-3 and 5295262U00
(—)
High pressure
piping sideConnector B and O-
ringKV48105300-1 and 5295262U00
(—)
NutKV48105300-2
( — )
SGIA0570E
Relief oil pressure
: 9.0 – 9.8 mPa (91.77 – 99.93 kg/cm2 , 1305.34 – 1421.37 psi)

PS-22
< SERVICE INFORMATION >
POWER STEERING OIL PUMP
• After installation, bleed air. Refer to PS-6, "Air Bleeding Hydraulic System" .
NOTE:
Belt tension is automatic and requires no adjustment.
Disassembly and AssemblyINFOID:0000000003532833
INSPECTION BEFORE DISASSEMBLY
Disassemble the power steering oil pump only if the following items are found.
• Deformed or damaged pulley, bracket, connector or suction pipe.
• Oil leakage from the suction pipe or connector.
DISASSEMBLY
NOTE:
Mount the power steering oil pump in a vise as needed.
1. Remove the connector bolt, connector and copper washers.
CAUTION:
Do not reuse the copper washers.
2. Remove the suction pipe and O-ring.
CAUTION:
Do not reuse the O-ring.
3. Remove the pulley nut and pulley.
4. Remove the bracket bolts and bracket.
INSPECTION AFTER DISASSEMBLY
Body Assembly Inspection
Check the power steering oil pump body assembly for damage. If any damage is found, replace with a new
power steering oil pump assembly.
ASSEMBLY
Assembly is in the reverse order of disassembly.
CAUTION:
• Do not reuse the copper gaskets
• Do not reuse the O-ring. Apply a coat of Genuine Nissan PSF or equivalent to the O-ring.
1. Bracket 2. Spring washer 3. Pulley
4. Power steering pump 5. High pressure hose bracket 6. O-ring
7. Suction pipe⇐Front
LGIA0038E

PS-24
< SERVICE INFORMATION >
HYDRAULIC LINE
• Confirm mating marks are aligned with hose and clamp, then cor-
rect if needed.
• To install eye joint, align projection of eye joint with notch of power
steering pump, and attach eye joint to power steering pump prop-
erly. Tighten eye bolt by hand fully, then torque to specification.
SGIA0563E
WGIA0089E

SERVICE DATA AND SPECIFICATIONS (SDS)
PS-27
< SERVICE INFORMATION >
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Oil PumpINFOID:0000000003532839
Steering FluidINFOID:0000000003532840
Rack sliding forceAt the neutral point:
Range within ± 11.5 mm
(±0.453 in) from the neutral
position
(in power ON)Area average value 147 − 211 N (14.99 − 21.52 kg, 33.1 − 47.52 lb)
Allowable variation 98 N (10 kg, 22 lb) or less
Whole area (in power OFF)Peak value 294 N (30.0 kg, 66 lb) or less
Allowable variation 147 N (16 kg, 35 lb) or less Steering gear modelPR26AM
Relief oil pressure
9.0 − 9.8 mPa (91.77 − 99.93 kg/cm2, 1305.34 − 1421.37 psi)
Fluid capacity
Approx. 1.0 (1-1/8 US qt, 7/8 Imp qt)

RF-10
< SERVICE INFORMATION >
SUNROOF
SUNROOF
Component Parts and Harness Connector LocationINFOID:0000000003533095
System DescriptionINFOID:0000000003533096
OUTLINE
Electric sunroof system consists of
• Front door switches
• Sunroof switch
• Sunroof motor assembly
• BCM (body control module)
BCM supplies power to the sunroof motor. Sunroof operation depends on sunroof switch condition.
OPERATION
Power is supplied at all times
• through 50A fusible link (letter f, located in the fuse and fusible link box)
• to BCM terminal 70 and
• through BCM terminal 69
• to sunroof motor assembly terminal 5.
With ignition switch in ON or START position, power is supplied
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38.
Ground is supplied
• to BCM terminal 67 and
• to sunroof motor assembly terminal 7
• through grounds M57, M61 and M79.
TILT UP OPERATION
When the tilt switch is operated for tilt up, ground is supplied
• to sunroof motor assembly terminal 4
LIIA2398E
1. Sunroof switch R104 2. Steering column 3. BCM M18, M19, M20
4. Sunroof motor harness connector R4 5. Sunroof motor assembly 6. Front door switch
LH B8
RH 108

SE-1
BODY
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CONTENTS
SEAT
SERVICE INFORMATION ............................3
PRECAUTIONS ...................................................3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
3
Precaution for Work ..................................................3
PREPARATION ...................................................4
Special Service Tool .................................................4
Commercial Service Tool ..........................................4
SQUEAK AND RATTLE TROUBLE DIAGNO-
SIS .......................................................................
5
Work Flow .................................................................5
Generic Squeak and Rattle Troubleshooting ............7
Diagnostic Worksheet ...............................................9
AUTOMATIC DRIVE POSITIONER ...................11
Component Parts and Harness Connector Loca-
tion ..........................................................................
11
System Description .................................................11
CAN Communication System Description ...............13
Schematic ...............................................................13
Wiring Diagram - AUT/DP - .....................................15
Terminal and Reference Value for BCM .................24
Driver Seat Control Unit Harness Connector Ter-
minal Layout ............................................................
25
Terminal and Reference Value for Driver Seat
Control Unit .............................................................
25
Automatic Drive Positioner Control Unit Harness
Connector Terminal Layout .....................................
28
Terminal and Reference Value for Automatic
Drive Positioner Control Unit ...................................
28
Work Flow ...............................................................30
Preliminary Check ...................................................30
BCM Power Supply and Ground Circuit Inspection
....
31
Power Supply and Ground Circuit Inspection .........31
CONSULT-II Function (AUTO DRIVE POS.) ..........32
CAN Communication Inspection Using CON-
SULT-II (Self-Diagnosis) ..........................................
35
Symptom Chart ........................................................35
Sliding Motor Circuit Inspection ...............................37
Reclining Motor LH Circuit Inspection .....................38
Lifting Motor (Front) Circuit Inspection ....................39
Lifting Motor (Rear) Circuit Inspection .....................40
Pedal Adjusting Motor Circuit Inspection .................41
Mirror Motor LH Circuit Inspection ...........................42
Mirror Motor RH Circuit Inspection ..........................44
Steering Wheel Tilt Circuit Inspection ......................45
Sliding Sensor Circuit Inspection .............................46
Reclining Sensor Circuit Inspection .........................47
Lifting Sensor (Front) Circuit Inspection ..................48
Lifting Sensor (Rear) Circuit Inspection ...................49
Pedal Adjusting Sensor Circuit Inspection ...............50
Mirror Sensor LH Circuit Inspection .........................51
Mirror Sensor RH Circuit Inspection ........................53
Steering Wheel Tilt Sensor Circuit Inspection .........54
Sliding Switch Circuit Inspection ..............................55
Reclining Switch Inspection .....................................56
Lifting Switch (Front) Circuit Inspection ...................58
Lifting Switch (Rear) Circuit Inspection ....................59
Power Seat Switch Ground Inspection ....................60
Pedal Adjusting Switch Circuit Inspection ...............61
Door Mirror Remote Control Switch (Changeover
Switch) Circuit Inspection ........................................
62
Door Mirror Remote Control Switch (Mirror
Switch) Circuit Inspection ........................................
64
Door Mirror Remote Control Switch Ground Circuit
Inspection ................................................................
65
Seat Memory Switch Circuit Inspection ...................66
Seat Memory Indicator Lamp Circuit Inspection ......67
Door Mirror Sensor Power Supply and Ground
Circuit inspection .....................................................
69
A/T Device (Park Position Switch) Circuit Inspec-
tion ...........................................................................
69
Steering Wheel Tilt Switch Circuit Inspection ..........70
Front Door Switch LH Circuit Inspection ..................72
UART Communication Line Circuit Inspection ........73