2009 INFINITI QX56 fold seats

MA-6
< ON-VEHICLE MAINTENANCE >
GENERAL MAINTENANCE
ON-VEHICLE MAINTENANCE
GENERAL MAINTENANCE
General MaintenanceINFOID:0000000003776979
General maintenance includes those items which should be checked during the normal day-to-day operation
of the vehicle. They are essential if the vehicle is to continue operating properly. The owner can perform these
checks and inspections or have thei r INFINITI dealers perform them.
OUTSIDE THE VEHICLE
The maintenance items listed here should be performed fr om time to time, unless otherwise specified.
INSIDE THE VEHICLE
The maintenance items listed here should be checked on a regular basis, such as when performing periodic maintenance, cleaning the vehicle,
etc.
Item Reference page
Tires Check the pressure with a gauge at least once a month and always prior to a
long distance trip. Adjust to the specified pressure if necessary. Check carefully
for damage, cuts or excessive wear. —
Wheel lug nuts When checking the tires, make sure no nuts are missing, and check for any loose
nuts. Tighten if necessary. WT-41, "
Adjustment"
Windshield
Clean the windshield on a regular basis. Check the windshield at least every six
months for cracks or other damage. Repair as necessary. —
Tire rotation Tires should be rotated every 12,000 km (7,500 miles). MA-29, "
Rotation"
Tire Pressure Monitor-
ing System (TPMS)
transmitter componentsReplace the TPMS transmitter grommet seat, valve core and cap when the tires
are replaced due to wear or age.
WT-43, "Transmitter
(Pressure Sensor)"
Wheel alignment and
balanceIf the vehicle pulls to either side while driving on a straight and level road, or if
you detect uneven or abnormal tire wear, there may be a need for wheel align-
ment. If the steering wheel or seat vibrates at normal highway speeds, wheel bal-
ancing may be needed. MA-28, "Balancing
Wheels", FSU-6, "Front
Wheel Alignment"
Windshield wiper
blades
Check for cracks or wear if they do not wipe properly.
—
Doors and engine
hood Check that all doors and the engine hood operate smoothly as well as the back
hatch. Also make sure that all latches lock securely. Lubricate if necessary. Make
sure that the secondary latch keeps the hood from opening when the primary
latch is released.
When driving in areas using road salt or other corrosive materials, check lubri-
cation frequently. MA-33, "
Lubricating
Locks, Hinges and Hood
Latches"
Lamps
Make sure that the head lamps, stop lamps, tail lamps, turn signal lamps, and
other lamps are all operating properly and installed securely. Also check head
lamp aim. Clean the head lamps on a regular basis. EXL-143, "HEADLAMP :
Aiming Adjustment"
Item
Reference page
Warning lamps and
chimes Make sure that all warning lamps and chimes are operating properly.
WCS-4, "
WARNING
CHIME SYSTEM : Sys-
tem Description"
Windshield wiper and
washerCheck that the wipers and washer operate properly and that the wipers do not
streak.
—
Windshield defroster Check that the air comes out of the defroster outlets properly and in sufficient
quantity when operating the heater or air conditioner. —
Steering wheel Check that it has the specified play. Be sure to check for changes in the steering
condition, such as excessive play, hard steering or strange noises. ST-15, "
On-Vehicle In-
spection and Service"
Seats
Check seat position controls such as seat adjusters, seat back recliner, etc. to
make sure they operate smoothly and that all latches lock securely in every po-
sition. Check that the head restraints move up and down smoothly and that the
locks (if equipped) hold securely in all latched positions. Check that the latches
lock securely for folding-down rear seat backs. —
Revision: December 20092009 QX56

SE-1
BODY INTERIOR
C
DE
F
G H
I
K L
M
SECTION SE
A
B
SE
N
O P
CONTENTS
SEAT
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
Preliminary Check ............................................... ......5
FUNCTION DIAGNOSIS ...............................6
THIRD ROW POWER FOLDING SEAT ......... .....6
System Description ............................................. ......6
Component Parts Location ........................................7
Component Description .............................................7
COMPONENT DIAGNOSIS ..........................8
POWER SEAT .....................................................8
Wiring Diagram — Passenger Side — ................ ......8
HEATED SEAT ...................................................12
Description ..............................................................12
Wiring Diagram .......................................................13
THIRD SEAT ......................................................19
Power Supply and Ground Circuit Check for Third
Row Power Folding Seat Control Unit ................. ....
19
Third Row Power Folding Seat Switch ....................20
Third Row Power Folding Seat Motor .....................20
ECU DIAGNOSIS .........................................22
THIRD ROW POWER FOLDING SEAT CON-
TROL UNIT .........................................................
22
Reference Value ................................................. ....22
Wiring Diagram .......................................................24
DTC Index ...............................................................29
Fail Safe ..................................................................30
SYMPTOM DIAGNOSIS ..............................31
THIRD ROW POWER FOLDING SEAT ......... ....31
Symptom Table ................................................... ....31
NONE OF THE THIRD ROW POWER FOLD-
ING SEATS WILL OPERATE WITH ANY
SWITCH. ............................................................
32
None of the Third Row Power Folding Seats Will
Operate With Any Third Row Power Folding Seat
Switch .................................................................. ....
32
ONLY ONE THIRD ROW POWER FOLDING
SEAT WILL OPERATE. ....................................
33
Only One Third Row Power Folding Seat Will Op-
erate .................................................................... ....
33
THIRD ROW POWER FOLDING SEAT WILL
OPERATE IN ONLY ONE DIRECTION. ...........
35
Third Row Power Folding Seat Will Operate in
Only One Direction .............................................. ....
35
THIRD ROW POWER FOLDING SEAT WILL
STOP SHORT OF IT’S FULLY UP OR DOWN
POSITION. .........................................................
36
Third Row Power Folding Seat Stops Short of it's
Fully Up or Down Position .......................................
36
THIRD ROW POWER FOLDING SEAT
MAKES EXCESSIVE NOISE WHILE MOV-
ING. ...................................................................
37
Third Row Power Folding Seat Makes Excessive
Noise While Moving ............................................. ....
37
SQUEAK AND RATTLE TROUBLE DIAG-
NOSES ..............................................................
38
Work Flow ................................................................38
Generic Squeak and Rattle Troubleshooting ...........40
Diagnostic Worksheet ..............................................42
PRECAUTION ..............................................44
PRECAUTIONS .................................................44
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ....
44
Revision: December 20092009 QX56

INSPECTION AND ADJUSTMENTSE-5
< BASIC INSPECTION >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
INSPECTION AND ADJUSTMENT
Preliminary CheckINFOID:0000000003775440
1.FOREIGN OBJECTS
Check the following:
• objects on or behind the seats that could cause binding
• objects under the seats that may be in terfering with the seat’s moving parts
Are there any foreign objects that could be causing interference with the seats?
YES >> Remove objects.
NO >> GO TO 2.
2.WIRING CONNECTIONS
1. Disconnect third row power folding seat c ontrol unit and seat motor harness connectors.
2. Check terminals for damage or loose connections.
3. Reconnect harness connectors.
Are any connectors damaged or loose?
YES >> Repair or replace damaged parts.
NO >> GO TO 3.
3.POWER AND GROUND
Check power supply and ground circuits for third row power folding seat control unit. Refer to SE-19, "
Power
Supply and Ground Circuit Check for Third Row Power Folding Seat Control Unit".
Is the inspection result normal?
YES >> Refer to SE-29, "DTC Index".
NO >> Repair or replace as necessary.
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEATSE-7
< FUNCTION DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
Component Parts LocationINFOID:0000000003775442
Component DescriptionINFOID:0000000003775443
ALJIA0088ZZ
1. Third row power folding seat control unit B401, B402 2. A/T assembly F9 3. Third row power folding seat switches
A: Third row power folding seat sw itch passenger side (front) B162
B: Third row power folding seat switch driver side (front) B164
C: Third row power folding seat switch passenger side (rear) B163
D: Third row power folding seat switch driver side (rear) B165
4. Third row power folding seat motors
A: RH (40%) seat B426
B: LH (60%) seat B403
Component Function
Third row power folding seat control unit • Receive inputs from third row power folding seat switches and A/T assembly (PNP
switch)
• Drive third row powe r folding seat motors
• Performs self-diagnostics
A/T assembly Provide PNP switch signal to third row power folding seat control unit
Third row power folding seat switches Provide fold up/fold down ground signals to third row power folding seat control unit
Third row power folding seat motors • Fold seats up and down
• Provide feedback signals to third row power folding seat control unit
Revision: December 20092009 QX56

THIRD SEATSE-19
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
THIRD SEAT
Power Supply and Ground Circu it Check for Third Row Power Folding Seat Control
Unit
INFOID:0000000003775447
1.CHECK FUSES AND FUSIBLE LINK
Check for blown fuses or fusible link.
Are any fuses or fusible links blown?
YES >> Install new fuse. Eliminate cause of malfunction if fuse blows again.
NO >> GO TO 2
2.POWER SUPPLY CIRCUIT CHECK
1. Disconnect third row power folding seat control unit connectors B401 and B402.
2. Check voltage between third row power folding seat control unit harness connectors B401, B402 terminals 1, 8, 13, 14 and
ground.
Are the inspection results normal?
YES >> GO TO 3
NO >> Check harness for open between third row power folding seat control unit and fuse or fusible link.
3.GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Check continuity between third row power folding seat control unit harness connector B402 terminals 16, 18, 21 and ground.
Do all terminals have ground?
YES >> Inspection End.
NO >> Check harness for ground.
Unit Power source Fuse or Fusible Link Location
Third row power folding seat control unit Battery
F
Fuse and fusible link box
19 Fuse block (J/B)
Ignition switch ON or START 14
TerminalsIgnition switch position
(+) (–) OFF ON START
Connector Terminal
A: B401 1
Ground Battery
voltage
80 VBattery
voltage
B: B402 13
Battery
voltage
14 Battery
voltage
ALJIA0274ZZ
Te r m i n a l s
Continuity
(+)
(–)
Connector Terminal
B402 16
Ground Yes
18
21
ALJIA0275ZZ
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEATSE-31
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
K L
M A
B
SE
N
O P
SYMPTOM DIAGNOSIS
THIRD ROW POWER FOLDING SEAT
Symptom TableINFOID:0000000003775454
Symptom Reference
None of the third row power folding seats will operate with any switch. Refer to
SE-32, "
None of the Third Row Power Folding
Seats Will Operate With Any Third Row Power Folding
Seat Switch".
Only one third row power folding seat will operate. Refer to
SE-33, "
Only One Third Row Power Folding Seat
Will Operate".
Third row power folding seat will operate in only one direction. Refer to
SE-35, "
Third Row Power Folding Seat Will Oper-
ate in Only One Direction".
Third row power folding seat will stop short of its fully up or down position. Refer to
SE-36, "
Third Row Power Folding Seat Stops
Short of it's Fully Up or Down Position".
Third row power folding seat makes excessive noise while moving. Refer to
SE-37, "
Third Row Power Fold ing Seat Makes Ex-
cessive Noise While Moving".
Seats make squeak or rattle noise. Refer to SE-38, "
Work Flow".
Revision: December 20092009 QX56

SE-32
< SYMPTOM DIAGNOSIS >
NONE OF THE THIRD ROW POWER FOLDING SEATS WILL OPERATE WITH
ANY SWITCH.
NONE OF THE THIRD ROW POWE R FOLDING SEATS WILL OPERATE
WITH ANY SWITCH.
None of the Third Row Power Folding Seat s Will Operate With Any Third Row Power
Folding Seat Switch
INFOID:0000000003775455
1.PRELIMINARY CHECK
Perform preliminary check. Refer to SE-5, "
Preliminary Check".
Are inspection results normal?
YES >> GO TO 2.
NO >> Perform repairs as necessary.
2.THIRD ROW POWER FOLDING SEAT SWITCH GROUND
1. Turn ignition switch OFF.
2. Disconnect any third row power folding seat switch connector.
3. Check continuity between third row power folding seat switch harness connector terminal 4 and ground.
Is there continuity?
YES >> GO TO 3.
NO >> Repair ground circuit.
3.PNP SWITCH SIGNAL
1. Confirm A/T selector lever is in PARK position.
2. Turn ignition switch ON.
3. Check voltage between third row power folding seat control unit harness connector B401 terminal 7 and ground.
Is there battery voltage?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam".
NO >> Repair circuit as necessary.
ALJIA0116ZZ
Terminals Ignition switch
(+)
(-)ON
Third row power
folding seat
control unit Te r m i n a l N o .
B401 7Ground Battery voltage
ALJIA0278ZZ
Revision: December 20092009 QX56

SE-34
< SYMPTOM DIAGNOSIS >
ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.
3. Check continuity between any third row power folding seatswitch passenger side harness connector B162 or B163 termi-
nals 2, 3 and third row power folding seat control unit harness
connector B401 terminals 3, 11.
Is there continuity?
YES >> GO TO 5.
NO >> Repair circuits as necessary.
5.THIRD ROW POWER FOLDING SEAT MOTOR
Check operation of affected third row power folding seat motor. Refer to SE-20, "
Third Row Power Folding
Seat Motor".
Are inspection results normal?
YES >> GO TO 6.
NO >> Replace third row power folding seat motor. Refer to SE-56, "
Exploded View".
6.CHECK CIRCUITS BETWEEN MOTOR AND CONTROL UNIT
Check continuity between third row power folding seat motor har-
ness connector B403 or B426 terminals 3, 4 and third row power
folding seat control unit terminals 17, 19 (LH) or 20, 22 (RH).
Are inspection results normal?
YES >> Replace third row power folding seat control unit. Refer to SE-59, "Power seat cross beam".
NO >> Repair circuits as necessary.
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 3
B162 or B163 3
Ye s
11 2
AWJIA0246ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B402 17 (LH), 22 (RH)
B403 (LH) or B426 (RH) 4
Ye s
19 (LH), 20 (RH) 3
AWJIA0361ZZ
Revision: December 20092009 QX56