power steering INFINITI QX56 2006 Factory Manual Online

PS-22
POWER STEERING OIL PUMP
Revision: November 20092006 QX56
Disassembly and AssemblyEGS00123
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
HYDRAULIC LINE
Revision: November 20092006 QX56
Installation is in the reverse order of removal.

Confirm mating marks are aligned with hose and clamp, then
correct 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 properly. Tighten eye bolt by hand fully, then torque to
specification.
SGIA0563E
WGIA0089E

SERVICE DATA AND SPECIFICATIONS (SDS)PS-27
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Revision: November 2009 2006 QX56
Steering GearEGS000UQ
Oil PumpEGS000UR
Steering FluidEGS000US
Steering gear modelPR26AM
Rack neutral position, dimension “L ” (rack stroke) 85.5 mm (3.36 in)
Rack sliding force At the neutral point:
Range within ±
11.5 mm
( ± 0.453 in) from the neutral
position
(in power ON) Area average value 250.1
− 308.9 N (25.5 − 31.5 kg, 56.2 − 69.5 lb)
Area minimum value 200 N (20.4 kg, 45 lb)
Allowable variation 98 N (10 kg, 22 lb) or less
STC0034D
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)

SE-1
SEAT
I BODY
CONTENTS
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for Work ........................................... ..... 3
PREPARATION ...................................................... ..... 4
Special Service Tool ............................................ ..... 4
Commercial Service Tool .................................... ..... 4
SQUEAK AND RATTLE TROUBLE DIAGNOSES ..... 5
Work Flow ................................................................ 5 CUSTOMER INTERVIEW ................................ ..... 5
DUPLICATE THE NOISE AND TEST DRIVE .. ..... 6
CHECK RELATED SERVICE BULLETINS ...... ..... 6
LOCATE THE NOISE AND IDENTIFY THE
ROOT CAUSE ................................................. ..... 6
REPAIR THE CAUSE ...................................... ..... 6
CONFIRM THE REPAIR .................................. ..... 7
Generic Squeak and Rattle Troubleshooting ...... ..... 7
INSTRUMENT PANEL ..................................... ..... 7
CENTER CONSOLE ........................................ ..... 7
DOORS ............................................................ ..... 7
TRUNK ............................................................. ..... 8
SUNROOF/HEADLINING ................................ ..... 8
OVERHEAD CONSOLE (FRONT AND REAR) ..... 8
SEATS .............................................................. ..... 8
UNDERHOOD .................................................. ..... 8
Diagnostic Worksheet ......................................... ..... 9
AUTOMATIC DRIVE POSITIONER ....................... ....11
Component Parts And Harness Connector Location .... 11
System Description ............................................. ... 12
FAIL-SAFE MODE ........................................... ... 12
CANCEL OF FAIL-SAFE MODE ...................... ... 13
CAN Communication System Description ........... ... 13
Schematic ........................................................... ... 14
Wiring Diagram — AUT/DP — ............................ ... 16
Terminals and Reference Values for BCM .......... ... 26
Terminals and Reference Values for Driver Seat
Control Unit ......................................................... ... 26
Terminals and Reference Values for Automatic Drive Positioner Control Unit ...............................
... 28
Work Flow ............................................................... 30
Preliminary Check ............................................... ... 31
SETTING CHANGE FUNCTION ...................... ... 31
POWER SUPPLY AND GROUND CIRCUIT
INSPECTION ................................................... ... 31
CONSULT-II Function (AUTO DRIVE POS.) ....... ... 34
CONSULT-II INSPECTION PROCEDURE ....... ... 34
SELF-DIAGNOSIS RESULTS .......................... ... 36
DATA MONITOR .............................................. ... 37
ACTIVE TEST ..................................................... 38
CAN Communication Inspection Using CONSULT-
II (Self-Diagnosis) ................................................ ... 38
Symptom Chart ....................................................... 38
Sliding Motor Circuit Inspection ........................... ... 40
Reclining Motor LH Circuit Inspection ................. ... 41
Lifting Motor (Front) Circuit Inspection ................ ... 42
Lifting Motor (Rear) Circuit Inspection ................. ... 44
Pedal Adjusting Motor Circuit Inspection ............. ... 45
Mirror Motor LH Circuit Check ................................ 46
Mirror Motor RH Circuit Check ............................ ... 48
Steering Wheel Tilt Circuit Inspection .................. ... 49
Sliding Sensor Circuit Inspection ......................... ... 51
Reclining Sensor Circuit Inspection ..................... ... 52
Lifting Sensor (Front) Circuit Inspection .............. ... 53
Lifting Sensor (Rear) Circuit Inspection ............... ... 54
Pedal Adjusting Sensor Circuit Inspection ........... ... 55
Mirror Sensor LH Circuit Check ........................... ... 56
Mirror Sensor RH Circuit Check ............................. 57
Steering Wheel Tilt Sensor Circuit Inspection ..... ... 59
Sliding Switch Circuit Inspection .......................... ... 61
Reclining Switch Inspection ................................. ... 62
Lifting Switch (Front) Circuit Inspection ............... ... 64
Lifting Switch (Rear) Circuit Inspection ................ ... 65
Power Seat Switch Ground Inspection ................ ... 66
Pedal Adjusting Switch Circuit Inspection ........... ... 67
Door Mirror Remote Control Switch (Changeover
Switch) Circuit Check ............................................. 69
Door Mirror Remote Control Switch (Mirror Switch)
Circuit Check ....................................................... ... 70

SE-2Revision: November 20092006 QX56
Door Mirror Remote Control Switch Ground Circuit
Inspection ............................................................
... 72
Seat Memory Switch Circuit Inspection ............... ... 72
Seat Memory Indicator Lamp Circuit Inspection .. ... 74
Door Mirror Sensor Power Supply and Ground Cir-
cuit inspection ...................................................... ... 75
A/T Device (Park Position Switch) Circuit Inspection ... 76
Steering Wheel Tilt Switch Circuit Inspection ...... ... 77
Front Door Switch LH Circuit Inspection .............. ... 79
UART Communication Line Circuit Inspection ..... ... 80
Removal and Installation ..................................... ... 82
POWER SEAT ........................................................ ... 83
Wiring Diagram — SEAT — for Passenger Seat . ... 83
HEATED SEAT ....................................................... ... 84
Description ........................................................... ... 84
Schematic ............................................................ ... 85
Wiring Diagram — HSEAT — .............................. ... 86
FRONT SEAT ......................................................... ... 91
Removal and Installation ..................................... ... 91
REMOVAL ........................................................ ... 94INSTALLATION .................................................
... 94
Disassembly and Assembly ................................. ... 94
SEATBACK TRIM AND PAD ............................ ... 94
REMOVAL OF SEATBACK ASSEMBLY .......... ... 96
INSTALLATION OF SEATBACK ASSEMBLY .. ... 96
SEAT CUSHION TRIM AND PAD (DRIVER) OR
SEAT CUSHION ASSEMBLY (PASSENGER) .. ... 96
SECOND SEAT ...................................................... ... 98
Removal and Installation ...................................... ... 98
SECOND ROW OUTBOARD ........................... ... 98
SECOND ROW CENTER ................................. ... 98
Disassembly and Assembly ................................. ... 99
THIRD SEAT ........................................................... .105
LH Side Seat ........................................................ .105
REMOVAL ......................................................... .105
INSTALLATION ................................................. .105
DISASSEMBLY AND ASSEMBLY .................... .106
RH Side Seat ....................................................... .107
REMOVAL ......................................................... .107
INSTALLATION ................................................. .108
DISASSEMBLY AND ASSEMBLY .................... .109

SE-12
AUTOMATIC DRIVE POSITIONER
Revision: November 20092006 QX56
System DescriptionEIS004XE

Refer to Owner's Manual for Automatic Drive Positioner system operating instructions.

The settings (ON/OFF) of the automatic sliding seat (Entry/Exiting operation) at entry/exit can be changed
as desired, using the display unit in the center of the instrument panel. The set content is transmitted by
CAN communication, from display control unit to driver seat control unit.

Using CONSULT-ll, the seat slide amount at entry/exit setting can be changed.
NOTE:

Disconnecting the battery erases the stored memory.

After connecting the battery, insert the key into the ignition cylinder and turn the front door switch LH ON (open) →OFF (close) →ON
(open), the Entry/Exiting function becomes possible.

After Exiting operation is carried out, return operation can be operated.
NOTE:
During automatic operation, if the ignition switch is turned ON →START, the automatic operation is suspended. When the ignition switch
returns to ON, it resumes.
FAIL-SAFE MODE
When any manual and automatic operations are not performed, if any motor operations of seats or pedals are
detected for T2 or more, status is judged “Output error ”.
7. Pedal adjusting switch M96 8. A. Door mirrror LH D4, RH D107
B. Front door switch LH B8
C. Front door lock assembly LH (key
cylinder switch) D149. A. A/T selector lever
B. A/T device (park position switch)
M203
10. A. Sliding motor LH P4 (driver seat view), reclining motor LH P5, lifting
motor (front) P6, lifting motor (rear)
P7
B. Driver seat control unit P2, P3
C. Power seat switch LH P8 11. A. ADP steering switch M16
B.Tilt motor M68, M69
Function Description
Memory operation The front seat LH, steering wheel, pedals (accelerator, brake) and door mirrors move
to the stored driving position by pushing seat memory switch (1 or 2).
Entry/Exit-
ing function Exiting operation
At exit, the seat moves backward and the steering wheel raises. (Exiting position)
Entry operation At entry, the seat and steering wheel return from Exiting position to the previous driv-
ing position before the Exiting operation.
Keyfob interlock operation Perform memory operation, turnout operation and return operation by pressing key-
fob unlock button.
Auto operation temporary stop
conditions. When ignition switch is turned to START during seat memory switch operation and return
operation, seat memory switch operation and return operation is stopped.
Auto operation stop conditions.

When the vehicle speed becomes 7 km/h (4 MPH) or higher (memory switch operation
and entry operation).

When the setting switch, seat memory switch 1, or 2 are pressed.

When A/T selector lever is in any position other than P.

When the door mirror remote control switch is operated (when ignition switch turned to
ON).

When power seat switch turned ON.

When pedal adjusting switch turned ON.

When front seat sliding Entry/Exiting setting is OFF (entry/exiting operation).
OPERATED PORTION T2
Seat sliding Approx. 0.1 sec.
Seat reclining Same as above
Seat lifting (Front) Same as above
Seat lifting (Rear) Same as above

SE-28
AUTOMATIC DRIVE POSITIONER
Revision: November 20092006 QX56
Terminals and Reference Values for Automatic Drive Positioner Control UnitEIS004XL
31 L/Y Sensor ground—0
32 B Ground —0
33 L/B Battery power supply —Battery voltage
35 V/W Sliding motor FORWARD out-
put signal Sliding switch FORWARD opera-
tion (Motor operated)
Battery voltage
Other than above 0
36 Y/G Reclining motor FORWARD out-
put signal Reclining switch FORWARD oper-
ation (Motor operated)
Battery voltage
Other than above 0
37 BR Front lifting motor DOWN output
signal Front lifting switch DOWN opera-
tion (Motor operated)
Battery voltage
Other than above 0
38 B/W Rear lifting motor UP output sig-
nal Rear end lifting switch UP opera-
tion (Motor operated)
Battery voltage
Other than above 0
39 Y Rear lifting motor DOWN output
signal Rear end lifting switch DOWN
operation (Motor operated)
Battery voltage
Other than above 0
40 Y/R Battery power supply —Battery voltage
42 O/B Sliding motor BACKWARD out-
put signal Sliding switch BACKWARD oper-
ation (Motor operated)
Battery voltage
Other than above 0
44 Y/R Reclining motor BACKWARD
output signal Reclining switch BACKWARD
operation (Motor operated)
Battery voltage
Other than above 0
45 GR Front lifting motor UP output sig-
nal Front lifting switch UP operation
(Motor operated)
Battery voltage
Other than above 0
48 B/W Ground — 0
Te r m i n a l
Wire
Color Item
Condition Voltage (V)
(Approx.)
Te r m i n a l Wire
Color Item
Condition Voltage (V)
(Approx.)
1 W/G ADP steering switch TILT UP ADP steering switch in UP position
0
Other than above 5
2 LG Changeover switch RH signal Changeover switch in RH position
0
Other than above 5
3 Y/B Mirror switch UP signal Mirror switch in UP position
0
Other than above 5
4 V/W Mirror switch LEFT signal Mirror switch in LEFT position
0
Other than above 5
5R/B Mirror sensor (RH vertical) sig-
nal Mirror motor RH is operated UP or
DOWN Changes between 3.4 (close to
peak) 0.6 (close to valley)
6L/Y Mirror sensor (LH vertical) sig-
nal Mirror motor LH is operated UP or
DOWN Changes between 3.4 (close to
peak) 0.6 (close to valley)
7 Y/BR Tilt sensor input Tilt position TOP
2
Tilt position BOTTOM 4

SE-30
AUTOMATIC DRIVE POSITIONER
Revision: November 20092006 QX56
Work Flow EIS004XM
1. Check the symptom and customer's requests.
2. Understand the system description. Refer to SE-12, "
System Description" .
3. Perform the preliminary check. Refer to SE-31, "
Preliminary Check" .
4. Check the self-diagnosis, results using CONSULT-II. Refer to SE-34, "
CONSULT-II Function (AUTO
DRIVE POS.)" .
5. Repair or replace depending on the self-diagnostic results.
6. Based on the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to SE-38,
"Symptom Chart" .
7. Does the automatic drive positioner system operate normally? If it is normal, GO TO 8.
If it is not normal, GO TO 3.
8. Inspection End.
30 Y Mirror motor RH DOWN signal
Mirror motor RH is operated DOWN 1.5 - Battery voltage
Other than above 0
Mirror motor RH RIGHT signal Mirror motor RH is operated RIGHT 1.5 - Battery voltage
Other than above
0
31 R Mirror motor LH UP signal Mirror motor LH is operated UP
1.5 - Battery voltage
Other than above 0
32 BR Mirror motor LH LEFT signal Mirror motor LH is operated LEFT
1.5 - Battery voltage
Other than above 0
33 W/L Sensor power supply —5
34 Y/R Battery power supply —Battery voltage
35 R Tilt motor UP signal ADP steering switch in UP position
Battery voltage
Other than above 0
37 G Pedal adjust motor FORWARD
signal Pedal adjust motor FORWARD
operation (Motor operated)
Battery voltage
Other than above 0
39 L/B Battery power supply —Battery voltage
40 B/W Ground —0
41 W/G Sensor ground —0
42 V Tilt motor DOWN signal ADP steering switch in DOWN posi-
tion
Battery voltage
Other than above 0
45 R Pedal adjust motor BACK-
WARD signal Pedal adjust motor BACKWARD
operation (Motor operated)
Battery voltage
Other than above 0
48 B Ground —0
Te r m i n a l
Wire
Color Item
Condition Voltage (V)
(Approx.)

AUTOMATIC DRIVE POSITIONERSE-31
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Preliminary CheckEIS004XN
SETTING CHANGE FUNCTION
The settings of the automatic driving positioner system can be changed, using CONSULT-II and the display in
the center of the instrument panel.
×: Applicable –: Not applicable
It is possible to set sliding front seat for entry/exit of vehicle by pressing set switch.
*: Setting of sliding front seat for entry/exit of vehicle is ON at factory-shipment. But if custom settings are reset, setting turns OFF.
NOTE:
After the setting is registered, the new setting is effective, even if the battery is disconnected.
POWER SUPPLY AND GROUND CIRCUIT INSPECTION
1. CHECK BCM FUSES AND FUSIBLE LINK
Check if any of the following fuses for the BCM are blown.
NOTE:
Refer to SE-11, "
Component Parts And Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
65, "ELECTRICAL UNITS LOCATION" .
Setting item ContentCONSULT
–II
(WORK SUPPORT) Display unitDefault
setting Factory
setting
SEAT SLIDE
VOLUME SET The distance at exiting opera-
tion can be selected from the
following 3 modes. 40mm
—××
80mm ——
150mm ——
Sliding Front Seat and
Steering Wheel Raise
When Entry/ Exiting
Vehicle The seat sliding and steering
wheel raise turnout and return
at entry/exit can be selected:
ON (operated)
–OFF (not
operated) ON
ON: Indicator lamp ON —×
OFF OFF: Indicator lamp OFF ×—
Reset custom settings* All settings to default. —Default: Setting button
ON ——
Content
Setting change operation Indicator LEDs
The seat sliding and steering
wheel raise turnout and return
at entry/exit can be operated. Press the set switch for more than 10 seconds Blinking twice
The seat sliding and steering
wheel raise turnout and return
at entry/exit can be not oper-
ated. Blinking once
Unit
Power source Fuse No.
BCM Battery power supply
f (50A)
ON or START power supply 59 (10A)
ACC or ON power supply 4 (10A)

TF-34
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
2. CHECK TIGHT CORNER BRAKING SYMPTOM (1)
1. Set 4WD shift switch to “AUTO” position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> GO TO TF-130, "Heavy Tight-corner Braking Symptom Occurs" .
NO >> GO TO 3.
3. CHECK TIGHT CORNER BRAKING SYMPTOM (2)
1. Set 4WD shift switch to “4HI” position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> Inspection End.
NO >> GO TO TF-131, "
4WD System Does Not Operate" .
Trouble Diagnosis Chart for SymptomsEDS002HI
If 4WD warning lamp turns ON, perform self-diagnosis. Refer to TF-50, "Self-diagnostic Procedure" .
Symptom ConditionCheck itemReference page
4WD shift indicator lamp and 4LO indicator
lamp do not turn ON
(4WD shift indicator lamp and 4LO indicator
lamp check) Ignition switch: ONPower supply and ground for transfer
control unit
TF-117
Transfer shut off relay
Combination meter
4WD warning lamp does not turn ON
(4WD warning lamp check) Ignition switch: ONPower supply and ground for transfer
control unit
TF-121
Transfer shut off relay
Combination meter
4WD shift indicator lamp or 4LO indicator
lamp does not change Engine running4WD shift switch
TF-123
Wait detection switch
Neutral-4LO switch
AT P s w i t c h
2-4WD solenoid
Transfer control device
Actuator motor
Actuator position switch
Transfer inner parts
ATP warning lamp turns ON Engine running CAN communication line
TF-125
4WD shift switch
PNP switch signal
AT P s w i t c h
Combination meter
Transfer inner parts
4LO indicator lamp repeats flashing Engine running Wait detection switch
TF-127
Neutral-4LO switch
Transfer inner parts
4WD warning lamp flashes rapidly (2 times/
second) While drivingTransfer fluid temperature
TF-128
Tire size is different between front and
rear of vehicle