2011 INFINITI QX56 lock

THIRD SEAT BELTSB-19
< REMOVAL AND INSTALLATION >
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SEAT BELT RETRACTOR : Exploded ViewINFOID:0000000006217628
SEAT BELT RETRACTOR : Removal and InstallationINFOID:0000000006217629
REMOVAL
THIRD SEAT BELT RETRACTOR
1. Operate rear seat lever or reclining lever to releas e seat lock assembly lock and to fold seat forward.
2. Remove the third seat assembly from vehicle. Refer to SE-138, "
Removal and Installation".
3. Remove the outer anchor. 1. Remove outer anchor cover.
2. Remove the outer anchor mounting anchor bolt.
1. Retaining washer 2. Spacer 3. Shoulder anchor
4. Rear seat belt finisher 5. Anchor bolt 6. Seat belt retractor (RH side)
7. Outer anchor 8. Outer anchor cover 9. Seat belt retractor (LH side)
10. Seat belt center retractor 11. Seat belt guide plate 12. Seat belt buckle (RH side)
13. Seat belt center buckle 14. Anchor nut 15. Seat belt anchor plate
16. Seat belt buckle (LH side) 17. Connector buckle
Refer to GI-4, "
Components" for symbols in the figure.
JMHIA1567GB
Revision: 2010 May2011 QX56

SBC-52
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006237930
1.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit (driver side and passenger side) harness connector.
3. Check continuity between pre-crash seat belt c ontrol unit (driver side and passenger side) harness con-
nector and ground.
Is the measurement value normal?
YES >> GO TO 2.
NO >> Repair or replace harness or connector.
2.CHECK POWER SUPPLY CIRCUIT-I
Check voltage between pre-crash seat belt control unit (driver side and passenger side) harness connector
and ground.
Is the measurement value normal?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECKPOWER SUPPLY CIRCUIT-II
1. Disconnect fuse block (J/B) harness connector.
2. Check continuity between pre-crash seat belt c ontrol unit (driver side and passenger side) harness con-
nector and fuse block (J/B) harness connector.
3. Check continuity between pre-crash seat belt c ontrol unit (driver side and passenger side) harness con-
nector and ground.
Is the measurement value normal?
YES >> Check 10 A fuse (No. 6).
NO >> Repair or replace harness or connector.
Pre-crash seat belt control unit GroundContinuity
Connector Terminal
B9 (Driver side) 18
Existed
20
B231 (Passenger side) 18
20
Pre-crash seat belt control unit
GroundVo l ta g e
(Approx.)
Connector Terminal
B9 (Driver side) 1 Battery voltage
B231 (Passenger side)
Pre-crash seat belt control unit Fuse block (J/B) Continuity
Connector Terminal Connector Terminal
B9 (Driver side) 1 M2 6B Existed
B231 (Passenger side)
Pre-crash seat belt control unit GroundContinuity
Connector Terminal
B9 (Driver side) 1 Not existed
B231 (Passenger side)
Revision: 2010 May2011 QX56

SCS-4
< PRECAUTION >[HBMC]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006256134
The Supplemental Restraint System such as “A IR 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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation after Battery Disconnect
INFOID:0000000006256136
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56

PRECAUTIONSSCS-5
< PRECAUTION > [HBMC]
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5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of a ll control units using CONSULT-III.
Precaution for Procedure without Cowl Top CoverINFOID:0000000006256138
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precaution for Hydraulic Body-Motion Control SystemINFOID:0000000006255996
WARNING:
 Always check the piping for loose co nnections, damage, or twists before starting operation, since
pressure in hydraulic circuit becom es high during air bleeding operation.
 When repairing or replacing a malfunctioning pa rt, always release pressure from hydraulic circuit,
since dangerous conditions may be created when oil leakage occurs during air bleeding operation.
 Clean surrounding areas of oil inlet and air bleeder usi ng steam before starting operation, since there may
be mud on it.
 Always decrease pressure when removing a system related part, since system pressure is high.
 Seal the removed part using vinyl tape for preventi ng dirt from getting on or entering the removed part.
 Check system pressure again 1 day or more after bleeding operation is complete, since system pressure may decrease when air bleeding is insufficient.
 Use Genuine NISSAN Hydraulic Suspension Fluid for suspension fluid.
 Never reuse drained suspension fluid.
 Check for suspension fluid leakage after removing a system-related part.
PIIB3706J
Revision: 2010 May2011 QX56

SCS-20
< BASIC INSPECTION >[HBMC]
CHECK INTERNAL LEAKAGE
CHECK INTERNAL LEAKAGE
Work ProcedureINFOID:0000000006256012
CAUTION:
 Clean surrounding areas of
oil injection jack using steam before starting operation, since there may
be mud on it.
 Clean oil pressure gauge (special service tool: KV40108000) jack with steam before use.
1. Remove protector of PPMU.
2. Remove cap of oil injection jack.
3. Install an oil pressure gauge (SST: KV40108000) (A) to oil injec- tion jack.
CAUTION:
 Jack must be securely inserted until a click sound can beheard.
 Pressure reducing valve (B) of the oil pressure gauge
must be closed.
4. Loosen needle valves A, C, and E of PPMU by approximately 2 rotations. CAUTION:
Never loosen the needle valve more than required.
5. Lift up the vehicle. CAUTION:
Check that tires never contact the ground.
6. Tighten needle valves C and E of PPMU.
7. Loosen lock nut of needle valve D of PPMU and then tighten needle valve D.
8. Lift down the vehicle. CAUTION:
Check that the lift is fully lowered.
9. Write down a value of the oil pressure gauge after 5 minutes.
10. Tighten needle valve A of PPMU.
11. Loosen lock nut of needle valve B of PPMU and then tighten needle valve B.
12. Loosen needle valve C of PPMU by approximately 2 rotations. CAUTION:
Never loosen the needle valve more than required.
13. Read a value of oil pressure gauge.
14. Compare difference of reading with pressure reading in step 9.
15. Tighten needle valves A, C, and E of PPMU to the specified torque.
16. Loosen needle valves B and D of PPMU by approximatel y 2 rotations and then tighten lock nut to the
specified torque.
CAUTION:
Never loosen the needle valve more than required.
JSEIA0186ZZ
Pressure difference
0.1 MPa or more : Normal
0.1 MPa or less : Malfunction
: 8.3 N·m (0.85 kg-m, 73 in-lb)
JSEIA0187ZZ
Revision: 2010 May2011 QX56

SCS-22
< BASIC INSPECTION >[HBMC]
CHECK FOR MALFUNCTION
CHECK FOR MALFUNCTION
Work ProcedureINFOID:0000000006256013
CAUTION:
 Clean surrounding areas of
oil injection jack using steam before starting operation, since there may
be mud on it.
 Clean oil pressure gauge (special service tool: KV40108000) jack with steam before use.
1. Remove protector of PPMU.
2. Remove cap of oil injection jack.
3. Install an oil pressure gauge (SST: KV40108000) (A) to oil injec- tion jack.
CAUTION:
 Jack must be securely inserted until a click sound can beheard.
 Pressure reducing valve (B) of the oil pressure gauge
must be closed.
4. Loosen needle valves A, C, and E of PPMU by approximately 2 rotations.
CAUTION:
Never loosen the needle valve more than required.
5. Lift up the vehicle. CAUTION:
Check that tires never contact the ground.
6. Tighten needle valves A and C of PPMU.
7. Loosen lock nuts of needle valves B and D of PPMU and then tighten needle valves B and D.
8. Write down a value of the oil pressure gauge.
9. Lift down the vehicle. CAUTION:
Check that the lift is fully lowered.
10. Read a value of oil pressure gauge.
11. Compare difference of reading with pressure reading in step 8.
12. Tighten needle valves A, C, and E of PPMU to the specified torque.
13. Loosen needle valves B and D of PPMU by approximatel y 2 rotations and then tighten lock nut to the
specified torque.
CAUTION:
Never loosen the needle valve more than required.
JSEIA0186ZZ
Pressure change
Pressure increases : PPMU malfunction
Pressure does not change : Shock absorber malfunction
Tightening torque : 8.3 N· m (0.85 kg-m, 73 in-lb)
Tightening torque : 20 N·m (2.0 kg-m, 15 ft-lb)
JSEIA0187ZZ
Revision: 2010 May2011 QX56

CHECK SHOCK ABSORBER FOR MALFUNCTIONSCS-25
< BASIC INSPECTION > [HBMC]
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- Disconnect upper side pipe (B) of front shock absorber.
 For rear shock absorber
- Disconnect lower side pipe (B ) of rear shock absorber.
9. Install a leak check plug (SST: KV40108400) (A) to the removed pipe and tighten the leak check plug to the specified torque.
CAUTION:
 O-ring must be free of scratches and damage.
 Piping must be kept free of the intrusion of dust and dirt.
10. Loosen lock nuts of needle valves B and D of PPMU and then tighten needle valves B and D.
11. Loosening position of needle valve of PPMU varies according to shock absorber that is che cked. Loosen needle valve of PPMU
by approximately 2 rotations, as per the following table.
CAUTION:
Never loosen the needle valve more than required.
12. Set knob (A) of suspension oil pump to the direction as shown in the figure.
13. Apply pressure of up to 2.4 MPa.
14. Go to step 15 when oil comes out from lower portion of shock absorber which pipe is removed from. Go to step 16 when oil
does not come out.
15. Replace shock absorber, since shock absorber has internal leakage. Refer to FSU-10, "
Removal and Installation" (front),
RSU-8, "
Removal and Installation" (rear).
A : Lower side pipe
JSEIA0233ZZ
A : Upper side pipe
JSEIA0203ZZ
Tightening torque : 5.0 N·m (0.51 kg-m, 44 in-lb)
Shock absorber Loosening position of needle valve
Front LH C
Rear LH C
Front RH A
Rear RH A
JSEIA0210ZZ
JSEIA0191ZZ
Revision: 2010 May2011 QX56

SCS-26
< BASIC INSPECTION >[HBMC]
CHECK SHOCK ABSORBER FOR MALFUNCTION
16. Shock absorber that is checked
is normal. Set knob (A) of sus-
pension oil pump to the direction as shown in the figure and
check that reading of pressure gauge is 0 MPa.
17. Tighten the loosened needle valve of PPMU.
18. Remove leak check plug from pipe. Install pipe to lower portion of shock absorber and tighten pipe to the specified torque.
CAUTION:
 O-ring must be free of scratches and damage.
 Piping must be kept free of th e intrusion of dust and dirt.
19. Check other shock absorbers in accor dance with procedures of steps 8 to 18.
20. Tighten needle valves A, C, and E of PPMU to t he specified torque, after completion of check.
21. Loosen needle valves B and D of PPMU by approximat ely 2 rotations and then tighten lock nuts to the
specified torque.
CAUTION:
Never loosen the needle valve more than required. Tightening torque : 5.0 N·
m (0.51 kg-m, 44 in-lb)
Tightening torque : 8.3 N· m (0.85 kg-m, 73 in-lb)
Tightening torque : 20 N·m (2.0 kg-m, 15 ft-lb)
JSEIA0193ZZ
Revision: 2010 May2011 QX56