Ignition switch INFINITI QX56 2010 Factory Service Manual

THIRD SEATSE-19
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THIRD SEAT
Power Supply and Ground Circu it Check for Third Row Power Folding Seat Control
Unit
INFOID:0000000005147387
Regarding Wiring Diagram information, refer to SE-24, "Wiring Diagram".
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.
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
ALJIA0275ZZ
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SE-20
< COMPONENT DIAGNOSIS >
THIRD SEAT
Do all terminals have ground?
YES >> Inspection End.
NO >> Check harness for ground.
Third Row Power Folding Seat SwitchINFOID:0000000005147388
1.CHECK THIRD ROW POWER FOLDING SEAT SWITCH OPERATION
1. Turn ignition switch OFF.
2. Disconnect third row power folding seat switch.
3. Check continuity between third row power folding seat switch terminals 2, 3 and 4.
Do you have continuity?
YES >> Inspection End.
NO >> Replace third row power folding seat switch.
Third Row Power Folding Seat MotorINFOID:0000000005147389
1.CHECK MOTOR OPERATION
1. Turn ignition switch OFF.
2. Disconnect third row power folding seat motor connector B403 or B426.
3. Check operation by applying battery voltage to motor terminals 3
and 4.
CAUTION:
• Do not operate motor for more than 3 seconds.
• Be careful not to overheat the harness.
• Third row power folding seat control unit may have to
relearn fold up/down positions after testing.
Does the motor rotate in both directions?
YES >> GO TO 2.
NO >> Replace third row power seat motor. Refer to SE-57, "
Exploded View".
2.CHECK RESISTANCE IN MOTOR
B40216
Ground Yes
18
21
Terminals Condition Continuity
2 4 Press switch button to fold up. Yes
3 4 Press switch button to fold down. Yes
ALJIA0089ZZ
LH (60%) seat
Terminal MotorSeat
3 (Battery positive) - 4 (Battery negative) Rotates counter-clockwise Up
4 (Battery positive) - 3 (Battery negative) Rotates clockwise Down
AWJIA0359ZZ
RH (40%) seat
Terminal MotorSeat
3 (Battery positive) - 4 (Battery negative) Rotates counter-clockwise Down
4 (Battery positive) - 3 (Battery negative) Rotates clockwise Up
Revision: April 20092010 QX56

SE-22
< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
ECU DIAGNOSIS
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
Reference ValueINFOID:0000000005147390
TERMINAL LAYOUT
PHYSICAL VALUES
ALJIA0277ZZ
Te r m i n a l N o .Wire
color Description
ConditionVoltage (V)
(Approx.)
+ - Signal nameInput/
Output
1 Ground Y/R Battery Input— Battery voltage
3Ground LG 40% seat switch signal
(down) OutputPush either third row power fold-
ing seat switch passenger (down) 0
Third row power folding seat switch passenger released Battery voltage
4Ground V 60% seat switch signal
(down) OutputPush either third row power fold-
ing seat switch driver (down) 0
Third row power folding seat switch driver released Battery voltage
7 Ground G/R Park signal InputA/T selector lever in P or N
Battery voltage
A/T selector lever not in P or N 0
8 Ground O/L Ignition signal InputIgnition switch ON or START
Battery voltage
Ignition switch OFF 0
9 Ground G/B 40% seat Hall signal Input —9V
10 Ground O/B 60% seat Hall signal Input —9V
11 Ground SB 40% seat switch signal (up) Output Push either third row power fold-
ing seat switch passenger (up) 0
Third row power folding seat switch passenger released Battery voltage
12 Ground O 60% seat switch signal (up) Output Push either third row power fold-
ing seat switch driver (up) 0
Third row power folding seat switch driver released Battery voltage
13 Ground W Battery Input— Battery voltage
14 Ground W Battery Input— Battery voltage
15 Ground Y/B Hall switch ground —— —
16 Ground B Switch ground —— —
17 Ground W/L 60% Seat motor Output— Battery voltage
18 Ground B Ground —— —
19 Ground R/W 60% Seat motor Output— Battery voltage
Revision: April 20092010 QX56

THIRD ROW POWER FOLDING SEAT CONTROL UNITSE-29
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DTC IndexINFOID:0000000005147392
NOTE:
To initiate a chime code sequence cycle, turn the ignition switch ON and OFF 3 times within 5 seconds. The
first digit will chime, then a pause, followed by the sec ond digit. For example, a code 13 will have 1 chime, fol-
lowed by a pause, and then 3 chimes. The third row pow er folding seat control unit will clear all codes that
have been corrected after 255 ignition cycles.
ABJIA0309GB
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SE-30
< ECU DIAGNOSIS >
THIRD ROW POWER FOLDING SEAT CONTROL UNIT
Fail Safe
INFOID:0000000005147393
The third row power folding seat will not operate under the following conditions:
• Power supply to the third row power folding seat control unit falls below 9.0V
• One of the third row power foldi ng seat switches is stuck closed
• The A/T selector lever is not in PARK position and the ignition switch is ON
DTCMalfunction Service Procedure
11 LH seat has traveled past normal fold
down position 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor LH Hall signal and ground circuits. Refer to SE-37, "
Third Row Power
Folding Seat Stops Short of it's Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor LH. Refer to SE-57, "
Exploded View".
12
LH seat has traveled past normal fold up
position
13 LH seat actuation cycle has taken too
long and timed out 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor LH motor cir- cuits. Refer to SE-33, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor LH. Refer to SE-57, "
Exploded View".
14 Third row power folding seat control unit
NVRAM data for LH seat position has
been corrupted Replace third row power folding seat control unit. Refer to
SE-
60, "Power seat cross beam".
15 Power supply to thir
d row power folding
seat control unit has been interrupted
during LH seat fold up/down cycle 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Replace third row power folding seat control unit. Refer to SE-60, "
Power seat cross beam".
21 RH seat has traveled past normal fold
down position 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor RH Hall signal and ground circuits. Refer to SE-37, "
Third Row Power
Folding Seat Stops Short of it's Fully Up or Down Posi-
tion".
3. Replace third row power folding seat motor RH. Refer to SE-57, "
Exploded View".
22
RH seat has traveled past normal fold up
position
23 RH seat actuation cycle has taken too
long and timed out 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Check third row power folding seat motor RH motor cir- cuits. Refer to SE-33, "
Only One Third Row Power Fold-
ing Seat Will Operate".
3. Replace third row power folding seat motor RH. Refer to SE-57, "
Exploded View".
24 Third row power folding seat control unit
NVRAM data for RH seat position has
been corrupted Replace third row power folding seat control unit. Refer to
SE-
60, "Power seat cross beam".
25 Power supply to thir
d row power folding
seat control unit has been interrupted
during RH seat fold up/down cycle 1. Perform Preliminary Check. Refer to
SE-5, "
Preliminary
Check".
2. Replace third row power folding seat control unit. Refer
to SE-60, "
Power seat cross beam".
33 System normal or END of chime codes —
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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:0000000005147395
Regarding Wiring Diagram information, refer to SE-24, "Wiring Diagram".
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.TRANSMISSION RANGE 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-60, "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: April 20092010 QX56

ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.SE-33
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ONLY ONE THIRD ROW POWER FOLDING SEAT WILL OPERATE.
Only One Third Row Power Folding Seat Will OperateINFOID:0000000005147396
Regarding Wiring Diagram information, refer to SE-24, "Wiring Diagram".
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
Determine which seat is malfunctioning.
Is the affected seat the LH (60%) side?
YES >> GO TO 3.
NO >> GO TO 4.
3.THIRD ROW POWER FOLDING SEAT SWITCH (DRIVER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch driver side connector.
3. Check continuity between the third row power folding seat switch driver side harness connector B164 or B165 terminal 4
and ground.
4. Check continuity between any third row power folding seat switch driver side harness connector B164 or B165 terminal 2, 3
and third row power folding seat control unit harness connector
B401 terminals 4, 12.
Are inspection results normal?
YES >> GO TO 5.
NO >> Repair circuits as necessary.
4.THIRD ROW POWER FOLDING SEAT SWITCH (PASSENGER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch passenger side connector.
Te r m i n a l s
Continuity
(+)
(-)
Third row power
folding seat
switch driver side Te r m i n a l N o .
B164 or B165 4Ground Yes
ALJIA0116ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 4
B164 or B165 3
Ye s
12 2
AWJIA0245ZZ
Revision: April 20092010 QX56

THIRD ROW POWER FOLDING SEAT WILL OPERATE IN ONLY ONE DIREC-TION.
SE-35
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THIRD ROW POWER FOLDING SEAT WI LL OPERATE IN ONLY ONE DI-
RECTION.
Third Row Power Folding Seat Will Operate in Only One DirectionINFOID:0000000005147397
Regarding Wiring Diagram information, refer to SE-24, "Wiring Diagram".
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
Determine which seat is malfunctioning.
Is the affected seat the LH (60%) side?
YES >> GO TO 3.
NO >> GO TO 4.
3.THIRD ROW POWER FOLDING SEAT SWITCH (DRIVER)
1. Turn ignition switch OFF.
2. Disconnect any third row power folding seat switch driver side connector.
3. Check continuity between third row power folding seat switch driver side harness connector B164 or B165 terminal 2, 3 and
third row power folding seat control unit harness connector B401
terminals 4, 12.
Is there continuity?
YES >> Replace third row power folding seat control unit. Refer to SE-60, "Power seat cross beam".
NO >> Repair circuits as necessary.
4.THIRD ROW POWER FOLDING SEAT SWITCH (PASSENGER)
1. Turn ignition switch OFF.
2. Disconnect either the front or rear third row power folding seat switch passenger side connector.
3. Check continuity between third row power folding seat switch passenger side harness connector B162 or B163 terminals 2, 3
and third row power folding seat control unit harness connector
B401 terminals 3, 11.
Is there continuity?
YES >> Replace third row power folding seat control unit. Refer to SE-60, "Power seat cross beam"
TerminalsContinuity
AB
Connector Terminal Connector Terminal
B401 4
B164 or B165 3
Ye s
12 2
AWJIA0247ZZ
Terminals Continuity
AB
Connector Terminal Connector Terminal
B401 3
B162 or B163 3
Ye s
11 2
AWJIA0248ZZ
Revision: April 20092010 QX56

THIRD ROW POWER FOLDING SEAT WILL STOP SHORT OF IT’S FULLY UP
OR DOWN POSITION.
SE-37
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THIRD ROW POWER FOLDING SEAT WI LL STOP SHORT OF IT’S FULLY
UP OR DOWN POSITION.
Third Row Power Folding Seat Stops Short of it's Fully Up or Down Position
INFOID:0000000005147398
Regarding Wiring Diagram information, refer to SE-24, "Wiring Diagram".
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.CHECK HISTORY
Check to see if a previous normal seat foldi ng operation was interrupted due to low voltage condition.
Was voltage interrupted?
YES >> Perform learn procedure by operating affected seat until seat reaches full open/closed position.
NO >> GO TO 3.
3.THIRD ROW POWER FOLDING SEAT MOTOR
1. Turn ignition switch OFF.
2. Disconnect third row power folding seat motor harness connec- tor and third row power folding seat control unit harness connec-
tor.
3. Check continuity between third row power folding seat motor
harness connector B403 (LH) or B426 (RH) terminals 1, 2 and
third row power folding seat control unit harness connector ter-
minals 10, 15 (LH) or 9, 15 (RH).
Is there continuity?
YES >> Replace affected third row power folding seat motor. Refer to SE-57, "Exploded View".
NO >> Repair circuits as necessary.
Te r m i n a l s Continuity
Connector Terminal Connector Terminal
A: B401 9 (RH)
C: B426 (RH)
1
Ye s
10 (LH)
C: B403 (LH)
B: B402 15 (LH/RH) C: B426 (RH)
2
C: B403 (LH)
AWJIA0362ZZ
Revision: April 20092010 QX56

PRECAUTIONSSE-45
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005256398
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005402593
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: April 20092010 QX56