Infiniti QX56 (JA60). Manual - part 820

INSPECTION AND ADJUSTMENT

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< BASIC INSPECTION >

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INSPECTION AND ADJUSTMENT

Preliminary Check

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1.

FOREIGN OBJECTS

Check the following:

• objects on or behind the seats that could cause binding

• objects under the seats that may be interfering 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 control 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"

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Is the inspection result normal?

YES

>> Refer to 

SE-29, "DTC Index"

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NO

>> Repair or replace as necessary.

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< FUNCTION DIAGNOSIS >

THIRD ROW POWER FOLDING SEAT

FUNCTION DIAGNOSIS

THIRD ROW POWER FOLDING SEAT

System Description

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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 FOLDING 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 folding seat control unit.  The con-

trol unit reverses polarity to the motors to raise or lower the seat.

The motors also contain Hall effect switches. These switches send

signals back to the control unit which help it determine fully open and

closed positions.

ALJIA0085ZZ

ALJIA0086ZZ

ALJIA0087ZZ

THIRD ROW POWER FOLDING SEAT

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< FUNCTION DIAGNOSIS >

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Component Parts Location

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Component Description

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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 switch 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 (trans-

mission range switch)

• Drive third row power folding seat motors
• Performs self-diagnostics

A/T assembly

Provide transmission range 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

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< COMPONENT DIAGNOSIS >

POWER SEAT

COMPONENT DIAGNOSIS

POWER SEAT

Wiring Diagram — Passenger Side —

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ABJWA0030GB