steering INFINITI QX56 2007 Factory Service Manual

RSU-4
< SERVICE INFORMATION >
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003532655
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
RSU-21RSU-30
—
—
—
RSU-21
RSU-23RSU-37
PR-3, "
NVH Troubleshooting Chart
"
RFD-7, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
BR-4, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation, damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
PROPELLER SHAFT
DIFFERENTIAL
FRONT AXLE
FRONT SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
SymptomNoise×××××× ××× ××××××
Shake×××× × × × ××××××
Vibration××××× × × ×× × ×
Shimmy×××× × × ××× ××
Shudder ××× × ××× ××
Poor quality ride or handling××××× ×× × ×××

REAR SUSPENSION ASSEMBLY
RSU-23
< SERVICE INFORMATION >
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Wheel AlignmentInspectionINFOID:0000000003532671
Rear Wheel Alignment Adjusting Bolts
PRELIMINARY INSPECTION
WARNING:
Always adjust the alignment with the vehicle on a flat surface. Use CONSULT-II “EXHAUST SOLE-
NOID” active test to release the air pressure from the rear load leveling air suspension system.
NOTE:
If alignment is out of specification, inspect and replace any damaged or worn rear suspension parts before
making any adjustments.
1. Check and adjust the wheel alignment with the vehicle under unladen conditions. “Unladen conditions”
means that the fuel, coolant, and lubricant are full; and that the spare tire, jack, hand tools and mats are in
their designated positions.
2. Check the tires for incorrect air pressure and excessive wear.
3. Check the wheels for runout and damage. Refer to WT-5, "
Inspection" .
4. Check the wheel bearing axial end play.
5. Check the shock absorbers. Refer to RSU-30, "
Removal and Installation" .
6. Check each mounting point of the suspension components for any excessive looseness or damage.
7. Check each link, arm, and the rear suspension member for any damage.
8. Check the vehicle height. Refer to RSU-44, "
Wheelarch Height (Unladen*1)" .
• If vehicle height is not within ± 10 mm (0.39 in) of the specification, perform the control unit initialization
procedure. Refer to RSU-42, "
Initialization Procedure" .
GENERAL INFORMATION AND RECOMMENDATIONS
1. A Four-Wheel Thrust Alignment should be performed.
• This type of alignment is recommended for any NISSAN vehicle.
• The four-wheel “thrust” process helps ensure that the vehicle is properly aligned and the steering wheel
is centered.
• The alignment machine itself should be capable of accepting any NISSAN vehicle.
• The alignment machine should be checked to ensure that it is level.
2. Make sure the alignment machine is properly calibrated.
• Your alignment machine should be regularly calibrated in order to give correct information.
WEIA0102E
1. Rear lower link adjusting bolt, LH 2. Front lower link adjusting bolt, LH 3. Front lower link adjusting bolt, RH
4. Rear lower link adjusting bolt, RH
Axial end play : 0 mm (0 in)

SE-1
BODY
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SECTION SE
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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

AUTOMATIC DRIVE POSITIONER
SE-11
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AUTOMATIC DRIVE POSITIONER
Component Parts and Harness Connector LocationINFOID:0000000003533156
System DescriptionINFOID:0000000003533157
• 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.
1. A. Automatic drive positioner control
unit M33, M34
B. Pedal adjusting motor E109, E1102. A. Steering column
B. Key switch and key lock solenoid
M27
C. BCM M18, M19, M20 (view with
instrument panel removed)3. A. Door mirror remote control switch
D10
B. Seat memory switch D5
4. Pedal adjusting switch M96 5. A. Door mirrror LH D4, RH D107
B. Front door switch LH B86. A. A/T selector lever
B. A/T device (park position switch)
M203
7. 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 P88. A. ADP steering switch M16
B.Tilt motor M68, M69
LIIA2726E

SE-12
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
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.
FA I L - S A F E M O D E
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”.
CANCEL OF FAIL-SAFE MODE
The mode is cancelled when the A/T selector lever is shifted to P position from any other position.
NOTE:
The front seat LH position and pedal adjustment functions (see the following table) operate simultaneously in
the order of priority.
*: In conjunction with sliding the seat, the door mirrors are positioned.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 functionExiting operation At exit, the seat moves backward and the steering wheel raises. (Exiting position)
Entry operationAt entry, the seat and steering wheel return from exiting position to the previous driving
position before the exiting operation.
Keyfob interlock operationPerform memory operation, turnout operation and return operation by pressing keyfob
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
Steering wheel Same as above
Pedal adjust Same as above
Priority Function Priority Function
1 Seat sliding, (door mirror LH/RH)* 4 Seat reclining
2 Pedal 5 Seat lifter-FR
3 Steering wheel 6 Seat lifter-RR

SE-28
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
Automatic Drive Positioner Control Unit Harness Connector Terminal Layout
INFOID:0000000003533164
Terminal and Reference Value for Automatic Drive Positioner Control UnitINFOID:0000000003533165
LIIA2449E
Te r m i n a l Wire Col-
orItem ConditionVoltage (V)
(Approx.)
1 W/G ADP steering switch TILT UPADP steering switch in UP position 0
Other than above 5
2 LG Changeover switch RH signalChangeover switch in RH position 0
Other than above 5
3 Y/B Mirror switch UP signalMirror switch in UP position 0
Other than above 5
4 V/W Mirror switch LEFT signalMirror switch in LEFT position 0
Other than above 5
5R/BMirror sensor (RH vertical) sig-
nalMirror motor RH is operated UP or
DOWNChanges between 3.4 (close to
peak) 0.6 (close to valley)
6L/YMirror sensor (LH vertical) sig-
nalMirror motor LH is operated UP or
DOWNChanges between 3.4 (close to
peak) 0.6 (close to valley)
7 Y/BR Tilt sensor inputTilt position TOP 2
Tilt position BOTTOM 4
8 BR/Y Pedal sensor input signalPedal position front end 0.5
Pedal position rear end 4.5
9 LG/B Seat memory switch 1 signalMemory switch 1 ON 0
Memory switch 1 OFF 5
10 L UART LINE (TX)Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
12 PSeat memory switch indictor 1
signalMemory switch 1 ON 0
Memory switch 1 OFF Battery voltage
PIIA4813E

AUTOMATIC DRIVE POSITIONER
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13 Y/GSeat memory switch indictor 2
signalMemory switch 2 ON 0
Memory switch 2 OFF Battery voltage
14 GR/R Mirror motor RH UP signalMirror motor RH is operated UP 1.5 - Battery voltage
Other than above 0
15 V/R Mirror motor RH LEFT signalMirror motor RH is operated LEFT 1.5 - Battery voltage
Other than above 0
16 OMirror motor LH DOWN signalMirror motor LH is operated DOWN 1.5 - Battery voltage
Other than above 0
Mirror motor LH RIGHT signalMirror motor LH is operated RIGHT 1.5 - Battery voltage
Other than above 0
17 G/BADP steering switch TILT
DOWNADP steering switch in DOWN posi-
tion0
Other than above 5
18 BR/W Changeover switch LH signalChangeover switch in LH position 0
Other than above 5
19 SB Mirror switch DOWN signalMirror switch in DOWN position 0
Other than above 5
20 GR Mirror switch RIGHT signalMirror switch in RIGHT position 0
Other than above 5
21 L/WMirror sensor (RH horizontal)
signalMirror motor RH is operated LEFT or
RIGHTChanges between 3.4 (close to left
edge) 0.6 (close to right edge)
22 GMirror sensor (LH horizontal)
signalMirror motor LH is operated LEFT or
RIGHTChanges between 3.4 (close to left
edge) 0.6 (close to right edge)
24 G/O Seat memory set switch signalSet switch 1 ON 0
Set switch 1 OFF 5
25 P/L Seat memory switch 2 signalMemory switch 2 ON 0
Memory switch 2 OFF 5
26 W UART LINE (RX)Pedal adjusting switch ON (FOR-
WARD or BACKWARD operation)
30 YMirror motor RH DOWN signalMirror motor RH is operated DOWN 1.5 - Battery voltage
Other than above 0
Mirror motor RH RIGHT signalMirror motor RH is operated RIGHT 1.5 - Battery voltage
Other than above 0
31 R Mirror motor LH UP signalMirror motor LH is operated UP 1.5 - Battery voltage
Other than above 0
32 BR Mirror motor LH LEFT signalMirror 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 Te r m i n a l Wire Col-
orItem ConditionVoltage (V)
(Approx.)
PIIA4814E

SE-30
< SERVICE INFORMATION >
AUTOMATIC DRIVE POSITIONER
Work Flow
INFOID:0000000003533166
1. Check the symptom and customer's requests.
2. Understand the system description. Refer to SE-11, "
System Description".
3. Perform the preliminary check. Refer to SE-30, "
Preliminary Check" .
4. Check the self-diagnosis, results using CONSULT-II. Refer to SE-32, "
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-35,
"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.
Preliminary CheckINFOID:0000000003533167
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
35 R Tilt motor UP signalADP steering switch in UP position Battery voltage
Other than above 0
37 GPedal adjust motor FORWARD
signalPedal adjust motor FORWARD op-
eration (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 signalADP steering switch in DOWN posi-
tionBattery voltage
Other than above 0
45 RPedal adjust motor BACK-
WARD signalPedal adjust motor BACKWARD op-
eration (Motor operated)Battery voltage
Other than above 0
48 B Ground — 0 Te r m i n a l Wire Col-
orItem ConditionVoltage (V)
(Approx.)
Setting item ContentCONSULT–II
(WORK SUPPORT)Display unitDefault
settingFactory
setting
SEAT SLIDE
VOLUME SETThe 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 Ve-
hicleThe seat sliding and steering
wheel raise turnout and return
at entry/exit can be selected:
ON (operated)–OFF (not oper-
ated)ON ON: Indicator lamp ON —×
OFF OFF: Indicator lamp OFF×—
Reset custom settings* All settings to default. —Default: Setting button
ON——

AUTOMATIC DRIVE POSITIONER
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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.
BCM Power Supply and Ground Circuit InspectionINFOID:0000000003533168
Refer to BCS-15, "BCM Power Supply and Ground Circuit Inspection".
Power Supply and Ground Circuit InspectionINFOID:0000000003533169
1.CHECK DRIVER SEAT CONTROL UNIT FUSES AND FUSIBLE LINK
Make sure any of the following fuses in the driver seat control unit and automatic drive positioner control unit
are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK DRIVER SEAT CONTROL UNIT POWER SUPPLY CIRCUIT
1. Disconnect driver seat control unit.
2. Check voltage between driver seat control unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3.CHECK DRIVER SEAT CONTROL UNIT GROUND CIRCUIT
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 secondsBlinking twice
The seat sliding and steering
wheel raise turnout and return
at entry/exit can be not operat-
ed.Blinking once
Unit Power source Fuse No.
Driver seat control unit START power supply 2 (10A)
Driver seat control unit and automatic
drive positionercontrol unitBattery power supply 22 (15A)
Battery power supplyf (50A)
ConnectorTe r m i n a l s
Power
sourceConditionVoltage (V)
(Approx.)
(+) (-)
P333 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
40 GroundBattery
power
supplyIgnition
switch
OFFBattery
voltage
P2 6 GroundSTART
power
supplyIgnition
switch
STARTBattery
voltage
PIIA4819E

AUTOMATIC DRIVE POSITIONER
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CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
SELF-DIAGNOSIS RESULTS
DISPLAY ITEM LIST
NOTE:
• If park switch error is detected, manual adjustable pedal operation cannot be performed when ignition switch
turns ON.
• The displays of CAN communication and detection switch display error detecting condition from memory
erase to the present on “TIME”.
- If error is detected in the past and present error is detected, “CRNT” is displayed.
- If error is detected in the past and present error is not detected, “PAST” is displayed.
- If error has never been detected, nothing is displayed on “TIME”.
• Any items other than CAN communication and park switch count error detection frequency occurred after
erase history to “1-127”.
- If error was detected in the past, error detection frequency from memory erase to the present is displayed on
“TIME”.
- If error has never been detected, nothing is displayed on “TIME”.
- Can clear the detected memory.
Normal: Clear memory in normal condition, history is erased and nothing is displayed on “TIME”.
Error: Clear memory in error condition, error is detected again and “1” is displayed on “TIME”.
DATA MONITOR
SELECTIOM FROM MENU
CONSULT-II display Item Malfunction is detected when...Reference
page
CAN COMM CIRC
[U1000]CAN communication Malfunction is detected in CAN communication. SE-35
SEAT SLIDE
[B2112]Seat slide motorWhen any manual and automatic operations are not performed, if any
motor operations of seat slide is detected for 0.1 second or more, sta-
tus is judged “Output error”.SE-37
SEAT RECLINING
[B2113]Seat reclining motorWhen any manual and automatic operations are not performed, if any
motor operations of seat reclining is detected for 0.1 second or more,
status is judged “Output error”.SE-38
SEAT LIFTER FR
[B2114]Seat lifting FR motorWhen any manual and automatic operations are not performed, if any
motor operations of seat lifting FR is detected for 0.1 second or more,
status is judged “Output error”.SE-39
SEAT LIFTER RR
[B2115]Seat lifting RR motorWhen any manual and automatic operations are not performed, if any
motor operations of seat lifting RR is detected for 0.1 second or more,
status is judged “Output error”.SE-40
STEERING TILT
[B2116]Steering tilt motorWhen any manual and automatic operations are not performed, if any
motor operations of tilt is detected for 0.1 second or more, status is
judged “Output error”.SE-45
TILT SENSOR
[B2118]Steering tilt sensorWhen steering tilt sensor detects 0.5V or lower, or 4.5V or higher, for
0.5 seconds or more.SE-54
ADJ PEDAL MO-
TOR
[B2117]Pedal adjust motorWhen any manual and automatic operations are not performed, if mo-
tor operations of seat pedal is detected for 0.1 second or more, status
is judged “Output error”.SE-41
ADJ PEDAL SEN-
SOR
[B2120]Pedal adjust sensorWhen pedal adjust sensor detects 0.5V or lower, or 4.5V or higher, for
0.5 seconds or more.SE-50
DETENT SW
[B2126]Park SWWith the A/T selector lever in P position (park position switch OFF), if
the vehicle speed of 7 km/h (4 MPH) or higher was input the park po-
sition switch input system is judged malfunctioning.SE-69
UART COMM
[B2128]UART communica-
tionMalfunction is detected in UART communication.SE-73