2009 INFINITI QX56 200

SE-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
>> GO TO 4
4.SYMPTOM
Check for symptoms. Refer to SE-31, "
Symptom Table".
>> GO TO 5
5.MALFUNCTIONING PARTS
Repair or replace the applicable parts.
>> GO TO 6
6.SYSTEM OPERATION
Check system operation.
>> GO TO 7
7.SELF-DIAGNOSIS
Perform self-diagnosis. Refer to SE-29, "
DTC Index".
Are any DTCs detected?
YES >> GO TO 5
NO >> Inspection End.
Revision: December 20092009 QX56

INSPECTION AND ADJUSTMENTSE-5
< BASIC INSPECTION >
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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

SE-6
< FUNCTION DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT
FUNCTION DIAGNOSIS
THIRD ROW POWER FOLDING SEAT
System DescriptionINFOID:0000000003775441
The third row power folding seat system is capable of allowing a user to fold up or down either the left or right
third row seat using a set of front or rear mounted switches.
THIRD ROW POWER FOLDIN G SEAT CONTROL UNIT
The third row power folding seat control unit is located in the control
unit/cross beam assembly underneath the LH third row seat. It
receives signals from the third row power folding seat switches, TCM
and the Hall effect switches mounted in the LH and RH seat motors.
The control unit has self-diagnosis capability through chime codes
and may be accessed by turning the ignition switch ON and OFF
three times. The control unit drives the LH and RH seat motors to
fold them up and down.
THIRD ROW POWER FOLDING SEAT SWITCH
The third row power folding seat switches are located in pairs on the
luggage side finisher RH. A switch must be held in order for the seat
to move.
THIRD ROW POWER FOLDING SEAT MOTORS
The third row power folding seat motors are located in the seat
motor/hinge assembly. There are two motors, one for LH and one
for RH seat folding operations. Power and ground are provided to
the motors by the third row power fo lding seat control unit. The con-
trol unit reverses polarity to the motors to raise or lower the seat.
The motors also contain Hall effe ct switches. These switches send
signals back to the control unit which help it determine fully open and
closed positions.
ALJIA0085ZZ
ALJIA0086ZZ
ALJIA0087ZZ
Revision: December 20092009 QX56

THIRD ROW POWER FOLDING SEATSE-7
< FUNCTION DIAGNOSIS >
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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

SE-8
< COMPONENT DIAGNOSIS >
POWER SEAT
COMPONENT DIAGNOSIS
POWER SEAT
Wiring Diagram — Passenger Side —INFOID:0000000003775444
ABJWA0030GB
Revision: December 20092009 QX56

POWER SEATSE-9
< COMPONENT DIAGNOSIS >
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ABJIA0118GB
Revision: December 20092009 QX56

SE-10
< COMPONENT DIAGNOSIS >
POWER SEAT
ABJIA0083GB
Revision: December 20092009 QX56

POWER SEATSE-11
< COMPONENT DIAGNOSIS >
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ABJIA0084GB
Revision: December 20092009 QX56