ignition INFINITI QX56 2010 Factory Service Manual

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 —
Revision: April 20092010 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: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
< SYMPTOM DIAGNOSIS >
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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
< SYMPTOM DIAGNOSIS >
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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
< SYMPTOM DIAGNOSIS >
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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

SE-46
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Precaution for WorkINFOID:0000000005147404
• When removing or disassembling each component, be careful not to damage or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component
with a shop cloth or vinyl tape to protect it.
• Protect the removed parts with a shop cloth and keep them.
• Replace a deformed or damaged clip.
• If a part is specified as a non-reusable part, always replace it with new one.
• Be sure to tighten bolts and nuts securely to the specified torque.
• After re-installation is completed, be sure to check that each part works normally.
• Follow the steps below to clean components.
- Water soluble foul: Dip a soft cloth into lukewarm water, and wring the water out of the cloth to wipe the fouled area.
Then rub with a soft and dry cloth.
- Oily foul: Dip a soft cloth into lukewarm water wit h mild detergent (concentration: within 2 to 3%), and wipe
the fouled area.
Then dip a cloth into fresh water, and wring the water out of the cloth to wipe the detergent off. Then rub with
a soft and dry cloth.
• Do not use organic solvent such as thinner, benzene, alcohol, or gasoline.
• For genuine leather seats, use a genuine leather seat cleaner.
Revision: April 20092010 QX56

FRONT SEATSE-51
< ON-VEHICLE REPAIR >
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Removal and InstallationINFOID:0000000005147410
REMOVAL
CAUTION:
• When removing or installing the seat trim, handle it carefully to keep dirt out and avoid damage.
• Before removing the front seat, turn the ignition switch off, disconnect both battery cables and wait
at least 3 minutes.
• When checking the power seat circuit for continuity using a circuit tester, do not confuse its connec-
tor with the side air bag module connector. Su ch an error may cause the air bag to deploy.
• Do not drop, tilt, or bump the side air bag modul e while installing the seat. Always handle it with
care.
• After front side air bag module inflat es, front seatback assembly must be replaced.
• Front passenger seat is equipped with an Occupant Classification System sensor and control mod-
ule. Do not disassemble front passenger seat cushion assembly or remove the trim as this will affect
the Occupant Classificatio n System calibration.
• Always replace passenger seat cushion as an assembly.
1. Slide the seat until the four body mounting bolts are visible and a tool can be inserted.
NOTE:
• If disassembling the seat after removal, set the front/rear cushion lifters to the top position.
2. Disconnect both battery cables and wait at least 3 minutes.
3. Remove the outer pedestal finisher.
4. Disconnect the side air bag module harness connector.
5. Remove the four body mounting bolts.
6. Disconnect the power seat harness connectors and remove the seat from the vehicle.
CAUTION:
When removing and installing the seat, use shop cloths to protect the vehicle from damage.
INSTALLATION
Installation is in the reverse order of removal.
19. Outer pedestal finisher20. Seat cushion outer finisher21. Seat cushion assembly
22. Power seat switch escutcheon 23. Slide switch knob 24. Recliner switch knob
25. Seatback assembly 26. Headrest holder27. Seat slide/ recline switch
28. Power lumbar switch
Revision: April 20092010 QX56

SEC-2
B2191 DIFFERENCE OF KEY ..........................34
Description ........................................................... ...34
DTC Logic ...............................................................34
Diagnosis Procedure ..............................................34
B2192 ID DISCORD, IMMU-ECM ......................35
Description ........................................................... ...35
DTC Logic ...............................................................35
Diagnosis Procedure ..............................................35
B2193 CHAIN OF ECM-IMMU ...........................37
Description ........................................................... ...37
DTC Logic ...............................................................37
Diagnosis Procedure ..............................................37
B2194 ID DISCORD IMMU-I-KEY .....................38
Description ........................................................... ...38
DTC Logic ...............................................................38
Diagnosis Procedure ..............................................38
B2552 INTELLIGENT KEY ................................39
Description ........................................................... ...39
DTC Logic ...............................................................39
Diagnosis Procedure ..............................................39
Special Repair Requirement ...................................39
B2590 ID DISCORD BCM-I-KEY .................... ...40
Description ........................................................... ...40
DTC Logic ...............................................................40
Diagnosis Procedure ..............................................40
P1610 LOCK MODE ..........................................41
Description ........................................................... ...41
DTC Logic ...............................................................41
Diagnosis Procedure ..............................................41
P1611 ID DISCORD, IMMU-ECM ......................42
Description ........................................................... ...42
DTC Logic ...............................................................42
Diagnosis Procedure ..............................................42
P1612 CHAIN OF ECM-IMMU ...........................44
Description ........................................................... ...44
DTC Logic ...............................................................44
Diagnosis Procedure ..............................................44
P1614 CHAIN OF IMMU-KEY ...........................45
Description ........................................................... ...45
DTC Logic ...............................................................45
Diagnosis Procedure ..............................................45
P1615 DIFFRENCE OF KEY .............................48
Description ........................................................... ...48
DTC Logic ...............................................................48
Diagnosis Procedure ..............................................48
POWER SUPPLY AND GROUND CIRCUIT .....49
INTELLIGENT KEY UNIT ...................................... ...49
INTELLIGENT KEY UNIT : Diagnosis Procedure ...49
BCM ........................................................................ ...49
BCM : Diagnosis Procedure ....................................49
KEY CYLINDER SWITCH .................................51
Description ..............................................................51
Component Function Check ...................................51
Diagnosis Procedure ...............................................51
IGNITION KNOB SWITCH ................................53
Ignition Knob Switch Check ................................. ...53
HOOD SWITCH .................................................55
Diagnosis Procedure ............................................ ...55
HORN FUNCTION .............................................57
Symptom Table .................................................... ...57
VEHICLE SECURITY INDICATOR ...................58
Description ........................................................... ...58
Component Function Check ..................................58
Diagnosis Procedure ...............................................58
ECU DIAGNOSIS .......................................60
BCM (BODY CONTROL MODULE) ............... ...60
Reference Value .................................................. ...60
Terminal Layout ......................................................63
Physical Values .......................................................63
Wiring Diagram - VEHICLE SECURITY SYSTEM ...69
Wiring Diagram - IVIS .............................................80
Fail Safe .................................................................87
DTC Inspection Priority Chart ...............................88
DTC Index ..............................................................88
INTELLIGENT KEY UNIT ..................................90
Reference Value - Intelligent Key Unit ................. ...90
Reference Value - Steering Lock Solenoid .............93
Wiring Diagram - INTELLIGENT KEY SYSTEM/
ENGINE START FUNCTION - ................................
94
Fail Safe ...............................................................104
DTC Inspection Priority Chart .............................105
DTC Index ............................................................105
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
106
Reference Value .................................................. .106
Terminal Layout ....................................................108
Physical Values .....................................................109
Fail Safe ...............................................................113
DTC Index ............................................................114
SYMPTOM DIAGNOSIS ...........................115
INTELLIGENT KEY SYSTEM/ENGINE
START FUNCTION SYMPTOMS ................... ..
115
Symptom Table .................................................... .115
VEHICLE SECURITY SYSTEM SYMPTOMS ..116
Symptom Table .....................................................116
INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS SYMPTOMS ...........................................
117
Symptom Table .................................................... .117
Revision: April 20092010 QX56

PRE-INSPECTION FOR DIAGNOSTICSEC-7
< BASIC INSPECTION > [WITH INTELLIGENT KEY SYSTEM]
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PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000005147151
The engine start function, door lock function, power di stribution system and NATS-IVIS/NVIS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing basic inspection to i dentify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security system by performing the vehicle security operation check
after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the Intelligent Key controller and door request switch.
Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless entry
receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to DLK-210, "
Symptom Table".
2.CHECK ENGINE STARTING
Check that the engine starts when operating the Intelligent Key.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to SEC-115, "
Symptom Table".
3.CHECK STEERING LOCKING
Does the steering lock when operating door switch after switching the power supply from ON position (or ACC
position) to LOCK position?
If door switch is malfunctioning, BC M cannot lock the steering. If BCM does not detect DTC, steering lock unit
is normal.
Does steering lock?
YES >> GO TO 4.
NO >> Refer to DLK-71, "
ComponentFunctionCheck".
4.CHECK IGNITION KNOB SWITCH OPERATION
Press ignition knob to check switch operation.
Does the combination meter display any message?
YES >> GO TO 5.
NO >> Refer to SEC-53, "
Ignition Knob Switch Check".
5.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation.
The vehicle security function can operate only when t he door lock and power distribution functions are operat-
ing normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Go to SEC-7, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000005147152
1.INSPECTION START
Turn ignition switch “OFF”.
NOTE:
Before starting operation check, open front windows.
>> GO TO 2.
Revision: April 20092010 QX56