BATTERY INFINITI QX56 2011 Factory Service Manual

B26F0 STEERING LOCK RELAYSEC-109
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B26F0 STEERING LOCK RELAY
DTC LogicINFOID:0000000006226264
DTC DETECTION LOGIC
NOTE:
 If DTC B26F0 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
 If DTC B26F0 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Shift selector lever to the P position.
2. Turn ignition switch ON.
3. Turn ignition switch OFF.
4. Press driver side door switch and wait 2 seconds or more.
5. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-109, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226265
1.CHECK DTC OF IPDM E/R
Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Perform the diagnosis procedure rela ted to the detected DTC. Refer to PCS-22, "DTCIndex".
NO >> GO TO 2.
2.CHECK STEERING LOCK UNIT POWER SUPPLY
Check voltage between steering lock unit harness connector and ground.
NOTE:
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B26F0 STRG LCK RELAY ON BCM requests IPDM E/R to turn steering lock
relay OFF, but BCM cannot receive steering
lock relay OFF state signal from IPDM E/R
(CAN) within 2 seconds.  Harness or connectors
(CAN communication line is open
or shorted.)
 Harness or connector (Steering lock unit circuit is open or
shorted.)
 Steering lock unit
IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
Steering lock unit
Connector Terminal
M12 1 Ground Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button
ignition switch
Battery voltage
Ignition switch ACC or ON 0
Revision: 2010 May2011 QX56

B2108 STEERING LOCK RELAYSEC-127
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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B2108 STEERING LOCK RELAY
DTC LogicINFOID:0000000006226286
DTC DETECTION LOGIC
NOTE:
 If DTC B2108 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to
PCS-22, "
DTCIndex".
 If DTC B2108 is displayed with other DTC, fi rst perform the trouble diagnosis for the other DTC.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the fo llowing conditions and wait 1 second or more.
- Selector lever: In the P position
- Brake pedal: Not depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-127, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226287
1.CHECK STEERING LOCK RELAY
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2108 STRG LCK RELAY ON IPDM E/R detects that steering lock relay is
stuck in the ON position for approximately 1
second even if IPDM E/R receives steering lock
relay OFF signal from BCM.  Harness or connectors
(CAN communication line is open
or shorted.)
IPDM E/R
(+)
(–) Condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E14 46 Ground Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button
ignition switch
Battery voltage
Ignition switch ACC or ON 0
Revision: 2010 May2011 QX56

SEC-128
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B2109 STEERING LOCK RELAY
B2109 STEERING LOCK RELAY
DTC LogicINFOID:0000000006226288
DTC DETECTION LOGIC
NOTE:
 If DTC B2109 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
PCS-32, "
Removal and Installation".
 If DTC B2109 is displayed with other DTC, firs t perform the trouble diagnosis for the other DTC.
 When IPDM E/R power supply voltage is low (Approx . 7 - 8 V for about 1 second), the DTC B2109 may be
detected.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the foll owing conditions and wait 1 second or more.
- Selector lever: In the P position
- Brake pedal: Not depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-128, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226289
1.CHECK POWER SUPPLY CIRCUIT
Check IPDM E/R power supply circuit. Refer to PCS-31, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning part.
2.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 10 A fuse (No. 44, located in IPDM E/R).
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Replace the blown fuse after repairing the cause of ffected circuit if a fuse is blown.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B2109 STRG LCK RELAY OFF IPDM E/R detects that steering lock relay is
stuck in the OFF position for approximately 1
second even if IPDM E/R receives steering
lock relay ON/OFF signal from BCM.  Harness or connector
(CAN communication line is open or
shorted.)
 Harness or connector (Power supply circui t for steering lock
relay is open or shorted.)
IPDM E/R
 Battery
Revision: 2010 May2011 QX56

SEC-134
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
B210E STARTER RELAY
B210E STARTER RELAY
DTC LogicINFOID:0000000006226298
DTC DETECTION LOGIC
NOTE:
 If DTC B210E is displayed with DTC U1000, first
perform the trouble diagnosis for DTC U1000. Refer to
PCS-28, "
DTC Logic".
 If DTC B210E is displayed with DTC B2605, first perform the trouble diagnosis for DTC B2605. Refer to
SEC-91, "
DTC Logic".
 When IPDM E/R power supply voltage is low (Approx. 7 - 8 V for about 1 second), the DTC B210E may be
detected.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press push-button ignition switch under the followi ng conditions to start engine, and wait 1 second or
more.
- Selector lever: In the P position
- Brake pedal: Depressed
2. Check DTC in “Self Diagnostic Result” mode of “IPDM E/R” using CONSULT-III.
Is DTC detected?
YES >> Go to SEC-134, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226299
1.CHECK STARTER RELAY OUTPUT SIGNAL
1. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK STARTER RELAY OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Disconnect IPDM E/R connector.
4. Check continuity between BCM harness connector and IPDM E/R harness connector.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B210E STARTER RELAY OFF When comparing the following items, IPDM E/R
detects that starter relay is stuck in the OFF posi-
tion for 1 second or more.
 Starter control relay
signal (CAN) from BCM
 Starter relay status signal (CAN) from BCM
 Starter control relay an d starter relay status
signal (IPDM E/R input)
 Starter control relay co ntrol signal (IPDM E/R
output)
 P/N position signal input  Harness or connector
(CAN communication line is open or
shorted.)
 Harness or connector (Starter relay circuit is open or
shorted.)
IPDM E/R
BCM
 Battery
(+)
(–) Condition
Voltage (V)
(Approx.)
BCM
Connector Terminal Ignition switch Brake pedal Selector lever
M71 97 Ground ON Depressed P or N 12
Other than above 0
Revision: 2010 May2011 QX56

B210E STARTER RELAYSEC-135
< DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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5. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Repair or replace harness.
3.CHECK STARTER RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Check harness for open or short bet ween IPDM E/R and battery. Refer to STR-7, "
Wiring Dia-
gram".
4.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform DTC CONFIRMATION PROCEDIURE for DTC B210E. Refer to SEC-134, "
DTC Logic".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
BCM IPDM E/R
Continuity
Connector Terminal Connector Terminal
M71 97 E13 30 Existed
BCM GroundContinuity
Connector Terminal
M71 97 Not existed
(+) (–)Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal E10 4 Ground Battery voltage
Revision: 2010 May2011 QX56

SEC-144
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
HORN FUNCTION
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to
PCS-32, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK VEHICLE SECURITY HORN RELAY POWER SUPPLY
1. Disconnect vehicle security horn relay.
2. Check voltage between vehicle security horn relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO-1 >> Check 10 A fuse [No. 36 located in the fuse block (J/B)].
NO-2 >> Check harness for open or short between vehicle security horn relay and fuse.
5.CHECK VEHICLE SECURITY HORN CONTROL CIRCUIT
1. Disconnect IPDM E/R connector.
2. Check continuity between IPDM E/R harness connec tor and vehicle security horn relay harness connec-
tor.
3. Check continuity between IP DM E/R harness connector and ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
6.CHECK VEHICLE SECURITY HORN CIRCUIT
1. Disconnect vehicle security horn connector.
2. Check continuity between vehicle security horn relay harness connector and vehicle security horn har-
ness connector.
3. Check continuity between vehicle secu rity horn relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
IPDM E/R GroundContinuity
Connector Terminal
E13 34 Not existed
(+) (–)Voltage (V)
(Approx.)
Vehicle security horn relay
Connector Terminal E124 1 Ground Battery voltage
IPDM E/R Vehicle se curity horn relay
Continuity
Connector Terminal Connector Terminal
E1334E1243Existed
IPDM E/R GroundContinuity
Connector Terminal
E13 34 Not existed
Vehicle security horn re lay Vehicle security horn
Continuity
Connector Terminal Connector Terminal
E124 2 E125 1 Existed
Vehicle security horn relay GroundContinuity
Connector Terminal
E124 2 Not existed
Revision: 2010 May2011 QX56

SEC-146
< DTC/CIRCUIT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
SECURITY INDICATOR LAMP
SECURITY INDICATOR LAMP
Component Function CheckINFOID:0000000006226312
1.CHECK FUNCTION
1. Perform “THEFT IND” in “ACTIVE TEST” m ode of “IMMU” of “BCM” using CONSULT-III.
2. Check security indicator lamp operation.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Go to SEC-146, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006226313
1.CHECK SECURITY INDICATOR LA MP POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO-1 >> Check 10 A fuse [No. 11, located in the fuse block (J/B)].
NO-2 >> Check harness for open or short between combination meter and fuse.
2.CHECK SECURITY INDI CATOR LAMP SIGNAL
1. Connect combination meter connector.
2. Disconnect BCM connector.
3. Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.REPLACE BCM
1. Replace BCM. Refer to BCS-81, "
Removal and Installation".
2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
4.CHECK SECURITY INDI CATOR LAMP CIRCUIT
1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector and BCM harness connector.
Te s t i t e m D e s c r i p t i o n
THEFT IND ON
Security indicator lamp Illuminates
OFF Does not illuminate
(+) (–)Voltage (V)
(Approx.)
Combination meter
Connector Terminal M34 1 Ground Battery voltage
(+) (–)Voltage (V)
(Approx.)
BCM
Connector Terminal
M68 23 Ground Battery voltage
Revision: 2010 May2011 QX56

SR-1
RESTRAINTS
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SECTION SR
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CONTENTS
SRS AIRBAG
PRECAUTION ................ ...............................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
2
Precaution for Battery Service ..................................3
Occupant Classification System ..............................3
Service ......................................................................3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Commercial Service Tools .................................. ......4
BASIC INSPECTION ....................................5
COLLISION DIAGNOSIS ............................... .....5
FOR FRONTAL COLLISION ................................. ......5
FOR FRONTAL COLLISION : When SRS is acti-
vated in a collision .....................................................
5
FOR FRONTAL COLLISION : When SRS is not
activated in a collision ...............................................
6
FOR SIDE AND ROLLOVER COLLISION ............ ......7
FOR SIDE AND ROLLOVER COLLISION : When
SRS is activated in a collision ............................. ......
7
FOR SIDE AND ROLLOVER COLLISION : When
SRS is not activated in a collision ....................... ......
8
REMOVAL AND INSTALLATION ...............11
DRIVER AIR BAG MODULE .......................... ....11
Exploded View .................................................... ....11
Removal and Installation .........................................11
SPIRAL CABLE ................................................14
Exploded View ..................................................... ....14
Removal and Installation .........................................14
FRONT PASSENGER AIR BAG MODULE ......17
Exploded View .........................................................17
Removal and Installation .........................................17
SIDE CURTAIN AIR BAG MODULE ................19
Exploded View .........................................................19
Removal and Installation .........................................19
CRASH ZONE SENSOR ...................................22
Exploded View ..................................................... ....22
Removal and Installation .........................................22
SIDE AIR BAG (SATELLITE) SENSOR ...........24
Exploded View .........................................................24
Removal and Installation .........................................24
DIAGNOSIS SENSOR UNIT .............................26
Exploded View .........................................................26
Removal and Installation .........................................26
SEAT BELT PRE-TENSIONER ........................28
Exploded View .........................................................28
Removal and Installation .........................................28
LAP PRE-TENSIONER .....................................29
Exploded View .........................................................29
Removal and Installation .........................................29
OCCUPANT DETECTION SYSTEM CON-
TROL UNIT ........................................................
30
Exploded View .........................................................30
Removal and Installation .........................................30
Revision: 2010 May2011 QX56

SR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006113043
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:0000000006113044
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

PRECAUTIONSSR-3
< PRECAUTION >
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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 Battery ServiceINFOID:0000000006113045
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prev ent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Occupant Classification SystemINFOID:0000000006113047
 Replace occupant classification system control uni t and passenger front seat cushion as an assembly.
Refer to SE-105, "
Exploded View".
ServiceINFOID:0000000006113046
 Never use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
 Before servicing the SRS, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3
minutes.
For approximately 3 minutes after the battery negative termi nal is removed, it is still possible for the air bag
and seat belt pre-tensioner to deploy. Therefore, never work on any SRS connectors or wires until at least 3
minutes have elapsed.
 Diagnosis sensor unit must always be installed with their arrow marks “ ⇐” pointing towards the front of the
vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities, or rust before installa-
tion and replace as required.
 The spiral cable must be aligned in the neutral position since its rotations are limited. Never turn steering
wheel and column after removal of steering gear.
 Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side facing upward and seat mounted front side air bag m odule standing with the stud bolt side facing downward.
 Perform self-diagnosis to check entire SRS fo r proper function after replacing any components.
 After air bag deploys, the front instrument panel assembly should be replaced if damaged.
 Always replace instrument panel pad following front passenger air bag deployment.
Revision: 2010 May2011 QX56