sensor INFINITI QX56 2010 Factory Service Manual

SR-18
< ON-VEHICLE REPAIR >
DIAGNOSIS SENSOR UNIT
• After replacing the air bag diagnosis sensor unit, confirm using CONSULT-III that the ECU discrimi-
nated number (identification number) of the new replacement air bag diagnosis sensor unit matches
the ECU discriminated number (identification number ) of the replaced (old) air bag diagnosis sensor
unit.
NOTE:
If the ECU discriminated number of the new replacement air bag diagnosis sensor unit differs from the ECU
discriminated number of the replaced air bag diagnosis sensor unit, reconfirm the parts information and verify
that the correct air bag diagnosis sensor unit was installed.
Revision: April 20092010 QX56

OCCUPANT CLASSIFICATION SYSTEM CONTROL UNITSR-19
< ON-VEHICLE REPAIR >
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OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
Removal and InstallationINFOID:0000000005147765
The occupant classification control unit, occupant cl assification (pressure) sensor, and bladder are an integral
part of the front passenger seat cushion and are replaced as an assembly. Refer to SE-51, "
Removal and
Installation" to remove the seat, and SE-69, "Disassembly and Assembly" to replace the seat cushion.
Revision: April 20092010 QX56

SR-20
< ON-VEHICLE REPAIR >
COLLISION DIAGNOSIS
COLLISION DIAGNOSIS
For Frontal CollisionINFOID:0000000005147766
Check the SRS components using the following table.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
SRS INSPECTION (FOR FRONTAL COLLISION)
PartSRS is activated SRS is NOT activated
Driver air bag module If the driver air bag has deployed:
REPLACE
Install with new fas-
teners. If the driver air bag has NOT been activated:
1. Remove driver air bag module. Check harness cover and connectors for dam-
age, terminals for deformities, and harness for binding.
2. Install driver air bag module into the steering wheel to check fit and alignment with the wheel.
3. If no damage is found, reinstall with new fasteners.
4. If damaged—REPLACE. Install driver air bag modules with new fasteners.
Front passenger air
bag module If the front passenger
air bag has deployed:
REPLACE
Install with new fas-
teners. If the front passenger air bag has NOT been activated:
1. Remove front passenger air bag module. Check harness cover and connectors
for damage, terminals for deformities, and harness for binding.
2. Install front passenger air bag module into the instrument panel to check fit with the instrument panel.
3. If no damage is found, reinstall with new fasteners.
4. If damaged—REPLACE. Install front passenger air bag modules with new fas-
teners.
Crash zone sensor If any of the front air bags or seat belt pre-
tensioners* have
been activated:
REPLACE the crash
zone sensor and
bracket with new fas-
teners.
*: Confirm seat belt
pre-tensioner activa-
tion using CONSULT-
III only. If the front air bags or seat belt pre-tensioners have NOT been activated:
1. Remove the crash zone sensor. Check harness connectors for damage, termi-
nals for deformities, and harness for binding.
2. Check for visible signs of damage (dents, cracks, deformation) of the crash zone sensor and bracket.
3. Install the crash zone sensor to check fit.
4. If no damage is found, reinstall with new fasteners.
5. If damaged—REPLACE the crash zone sensor and bracket with new fasteners.
Seat belt pre-tension-
er assemblies
(All applicable loca-
tions: buckle, reel, lap
outer) If either the driver or
passenger seat belt
pre-tensioner* has
been activated:
REPLACE all seat
belt pre-tensioner as-
semblies with new
fasteners.
*: Confirm seat belt
pre-tensioner activa-
tion using CONSULT-
III only. If the pre-tensioners have NOT been activated:
1. Remove seat belt pre-tensioners.
Check harness cover and connectors for damage, terminals for deformities, and
harness for binding.
2. Check belts for damage and anchors for loose mounting.
3. Check retractor for smooth operation.
4. Check seat belt adjuster for damage.
5. Check for deformities of the center pillar inner.
6. If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner
assembly.
7. If no damage is found, reinstall seat belt pre-tensioner assembly.
8. If damaged—REPLACE. Install the seat belt pre-tensioners with new fasteners.
Diagnosis sensor unit If any of the SRS com- ponents have been
activated:
REPLACE the diag-
nosis sensor unit.
Install with new fas-
teners. If none of the SRS components have been activated:
1. Check case for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall with new fasteners.
4. If damaged—REPLACE. Install diagnosis sensor unit with new fasteners.
Revision: April 20092010 QX56

COLLISION DIAGNOSISSR-21
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For Side and Rollover CollisionINFOID:0000000005147767
Check the SRS components using the following table.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
WHEN SRS IS ACTIVATED IN THE SIDE OR ROLLOVER COLLISION
1. Replace the following components:
- Front seat back assembly (on the side on which side air bag is activated)
- Diagnosis sensor unit
- (LH or RH) side air bag (satellite) sensor (on the side on which side air bag is activated)
2. Check the SRS components and the related parts using the following table.
- Replace any SRS components and the related parts showing visible signs of damage (dents, cracks,
deformation).
3. Conduct self-diagnosis using CONSULT-III and “AIR BAG” warning lamp. Refer to SRC-13, "
SRS Opera-
tion Check" for details. Ensure entire SRS operates properly.
WHEN SRS IS NOT ACTIVATED IN THE SIDE OR ROLLOVER COLLISION
1. Check the SRS components and the related parts using the following table.
- If the front seat back assembly is damaged, t he front seat back assembly must be replaced.
2. Conduct self-diagnosis using CONSULT-III and “AIR BAG” warning lamp. Refer to SRC-13, "
SRS Opera-
tion Check" for details. Ensure entire SRS operates properly.
SRS INSPECTION (FOR SIDE AND ROLLOVER COLLISION)
Steering wheel 1. Visually check steering wheel for deformities.
2. Check harness (built into steering wheel) and connectors for damage, and terminals for deformities.
3. Install driver air bag module into the steering wheel to check fit and alignment with the wheel.
4. Check steering wheel for excessive free play.
5. If no damage is found, reinstall.
6. If damaged—REPLACE.
Spiral cable If the driver front air
bag has deployed:
REPLACE the spiral
cable. If the driver front air bag has not deployed:
1. Visually check spiral cable and combination switch for damage.
2. Check connectors and protective tape for damage.
3. Check steering wheel for noise, binding or heavy operation.
4. If no damage is found, reinstall.
5. If damaged—REPLACE.
Occupant classifica-
tion system (Passen-
ger seat) 1. Remove passenger seat.
2. Check control unit case for dents, cracks of deformities.
3. Check connectors and pressure sensor tube for damage, and terminals for deformities.
4. Check seat frame and cushion pan for dents or deformities.
5. If no damage is found, reinstall seat with new fasteners.
6. If damaged — REPLACE seat cushion assembly with new fasteners.
Harness and connec-
tors 1. Check connectors for poor connection, damage, and terminals for deformities.
2. Check harness for binding, chafing, cuts, or deformities.
3. If no damage is found, reinstall the harness and connectors.
4. If damaged—REPLACE the damaged harness. Do not attempt to repair, splice or modify any SRS har-
ness.
Instrument panel If the passenger front air bag has deployed:
REPLACE the instru-
ment panel assembly.If the passenger front air bag has NOT deployed:
1. Visually check instrument panel for damage.
2. If no damage is found, reinstall the instrument panel.
3. If damaged—REPLACE the instrument panel.
Part
SRS is activated SRS is NOT activated
Revision: April 20092010 QX56

SR-22
< ON-VEHICLE REPAIR >
COLLISION DIAGNOSIS
PartSRS is activated SRS is NOT activated
LH side curtain air
bag module If the LH side curtain
air bag has deployed:
REPLACE the LH
side curtain air bag
module. (Repair the
center pillar inner, etc.
before installing new
one if damaged.)If the LH side curtain air bag has NOT deployed:
1. Check for visible signs of damage (dents, tears, deformation) of the center pillar
on the collision side.
2. If damaged—Remove the LH side curtain air bag module.
3. Check for visible signs of damaged (tears etc.) of the LH side curtain air bag mod- ule.
4. Check harness and connectors for damage, and terminals for deformities.
5. If no damage is found, reinstall the LH side curtain air bag module with new fas- teners.
6. If damaged—REPLACE the LH side curtain air bag module with new fasteners.
RH side curtain air
bag module If the RH side curtain
air bag has deployed:
REPLACE the RH
side curtain air bag
module. (Repair the
center pillar inner, etc.
before installing new
one if damaged.)If the RH side curtain air bag has NOT deployed:
1. Check for visible signs of damage (dents, tears, deformation) of the center pillar
on the collision side.
2. If damaged—Remove the RH side curtain air bag module.
3. Check for visible signs of damaged (tears etc.) of the RH side curtain air bag module.
4. Check harness and connectors for damage, and terminals for deformities.
5. If no damage is found, reinstall the RH side curtain air bag module with new fas- teners.
6. If damaged—REPLACE the RH side curtain air bag module with new fasteners.
Front LH side air bag
module If the front LH side air
bag has deployed:
REPLACE front LH
seatback assembly.If the front LH side air bag has NOT deployed:
1. Check for visible signs of damage (dents, tears, deformation) of the seat back on
the collision side.
2. Check harness and connectors for damage, and terminals for deformities.
3. If damaged—REPLACE the front LH seatback assembly.
Front RH side air bag
module If the front RH side air
bag has deployed:
REPLACE front RH
seatback assembly.If the front RH side air bag has NOT deployed:
1. Check for visible signs of damage (dents, tears, deformation) of the seat back on
the collision side.
2. Check harness and connectors for damage, and terminals for deformities.
3. If damaged—REPLACE the front RH seatback assembly.
(LH or RH) side air
bag (satellite) sensor If any of the SRS
components have de-
ployed:
REPLACE the side air
bag (satellite) sensor
on the collision side
with new fasteners.
(Repair the center pil-
lar inner, etc. before
installing new one if
damaged.)If none of the SRS components have been activated:
1. Remove the side air bag (satellite) sensor on the collision side. Check harness
connectors for damage, terminals for deformities, and harness for binding.
2. Check for visible signs of damage (dents, cracks, deformation) of the side air bag
(satellite) sensor.
3. Install the side air bag (satellite) sensor to check fit.
4. If no damage is found, reinstall the side sir bag (satellite) sensor with new fasten- ers.
5. If damaged—REPLACE the side air bag (satellite) sensor with new fasteners.
Diagnosis sensor unit If any of the SRS components have de-
ployed:
REPLACE the diag-
nosis sensor unit with
new fasteners.If none of the SRS components have been activated:
1. Check case and bracket for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall the diagnosis sensor unit with new fasteners.
4. If damaged—REPLACE the diagnosis sensor unit with new fasteners.
Seat belt pre-tension-
er assemblies
(All applicable loca-
tions: buckle, reel, lap
outer) If either the driver or
passenger seat belt
pre-tensioner* has
been activated:
REPLACE all seat
belt pre-tensioner as-
semblies with new
fasteners.
*: Confirm seat belt
pre-tensioner activa-
tion using CONSULT-
III only.If the pre-tensioners have NOT been activated:
1. Remove seat belt pre-tensioners.
Check harness cover and connectors for damage, terminals for deformities, and
harness for binding.
2. Check belts for damage and anchors for loose mounting.
3. Check retractor for smooth operation.
4. Check seat belt adjuster for damage.
5. Check for deformities of the center pillar inner.
6. If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner
assembly.
7. If no damage is found, reinstall seat belt pre-tensioner assembly.
8. If damaged—REPLACE. Install the seat belt pre-tensioners with new fasteners.
Revision: April 20092010 QX56

SRC-2
Diagnosis Procedure (Component Diagnosis) ........39
B1086 – B1089 SEAT BELT PRE-TENSION-
ER LH .................................................................
41
Description ........................................................... ...41
DTC Logic ...............................................................41
Diagnosis Procedure (Component Diagnosis) ........42
B1081 – B1084 SEAT BELT PRE-TENSION-
ER RH ................................................................
44
Description ..............................................................44
DTC Logic ...............................................................44
Diagnosis Procedure (Component Diagnosis) ........45
B1182 - B1185 SEAT BELT BUCKLE PRE-
TENSIONER LH .................................................
47
Description ........................................................... ...47
DTC Logic ...............................................................47
Diagnosis Procedure (Component Diagnosis) ........48
B1177 - B1180 SEAT BELT BUCKLE PRE-
TENSIONER RH ................................................
50
Description ........................................................... ...50
DTC Logic ...............................................................50
Diagnosis Procedure (Component Diagnosis) ........51
B1033 – B1035 CRASH ZONE SENSOR .........53
Description ........................................................... ...53
DTC Logic ...............................................................53
Diagnosis Procedure (Component Diagnosis) ........54
B1118 – B1120 SATELLITE SENSOR LH ........56
Description ........................................................... ...56
DTC Logic ...............................................................56
Diagnosis Procedure (Component Diagnosis) ........57
B1113 – B1115 SATELLITE SENSOR RH .......59
Description ........................................................... ...59
DTC Logic ...............................................................59
Diagnosis Procedure (Component Diagnosis) ........60
B1XXX AIR BAG DIAGNOSIS SENSOR UNIT ...62
Description ........................................................... ...62
DTC Logic ...............................................................62
Diagnosis Procedure (Component Diagnosis) ........63
B1023 PASSENGER AIR BAG OFF INDICA-
TOR ....................................................................
64
Description ........................................................... ...64
DTC Logic ...............................................................64
Diagnosis Procedure (Component Diagnosis) ........65
B1017 – B1022 OCCUPANT CLASSIFICA-
TION SYSTEM ................................................ ...
67
Description ........................................................... ...67
DTC Logic ...............................................................67
Diagnosis Procedure (Component Diagnosis) ........68
B1209 – B1211 COLLISION DETECTION ........70
Description ........................................................... ...70
DTC Logic ...............................................................70
Diagnosis Procedure (Component Diagnosis) ........70
ECU DIAGNOSIS .......................................71
DIAGNOSIS SENSOR UNIT .............................71
Wiring Diagram .................................................... ...71
Trouble Diagnosis with CONSULT-III .....................80
Trouble Diagnosis without CONSULT-III ................84
SYMPTOM DIAGNOSIS ............................89
SRS AIR BAG SYSTEM ................................. ...89
"AIR BAG" Warning Lamp Does Not Turn Off ..... ...89
"AIR BAG" Warning Lamp Does Not Turn On ........89
PASSENGER SEAT BELT WARNING SYS-
TEM ....................................................................
91
Seat Belt Warning System Does Not Function .... ...91
PRECAUTION ............................................92
PRECAUTIONS .............................................. ...92
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ...
92
Precaution for SRS "AIR BAG" and "SEAT BELT
PRE-TENSIONER" Service ................................. ...
92
Occupant Classification System Precaution ...........92
Revision: April 20092010 QX56

SRC-6
< FUNCTION DIAGNOSIS >
SRS AIR BAG SYSTEM
FUNCTION DIAGNOSIS
SRS AIR BAG SYSTEM
SRS ConfigurationINFOID:0000000005147771
The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or
START position.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module, front passenger air bag module, front seat belt pre-tensioners
and seat belt buckle pre-tensioner assemblies are activated in a frontal collision but not in a side collision.
SRS configurations for some collision modes are as follows:
WHIA0215E
SRS configuration Frontal collision Left side collision Right side colli-
sion Rollover
Driver air bag module x— — —
Front passenger air bag module x— — —
Front LH seat belt pre-tensioner x— — x
Front LH seat belt buckle pre-tensioner assembly x— — x
Front RH seat belt pre-tensioner x— — x
Front RH seat belt buckle pre-tensioner assembly x— — x
Front LH side air bag module —x— —
Front RH side air bag module —— x—
LH side curtain air bag module —x— x
RH side curtain air bag module —— xx
Revision: April 20092010 QX56

SRS AIR BAG SYSTEMSRC-7
< FUNCTION DIAGNOSIS >
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SRS Component Parts LocationINFOID:0000000005147772
Driver Air Bag ModuleINFOID:0000000005147773
The driver air bag module is dual stage and located in the steering
wheel assembly. It operates with the SRS system in a frontal colli-
sion exceeding a specified level.
1. Side curtain air bag modules 2. Front RH side air bag module 3. Belt tension sensor
4. RH side air bag (satellite) sensor 5. Front RH seat belt pre-tension- er6. Seat belt buckle pre-tensioner assembly
RH
7. Occupant classification system sen- sor 8. Occupant classification system
control unit 9. Front passenger air bag off indicator
10. Front passenger air bag module 11. Crash zone sensor 12. Air bag warning lamp
13. Spiral cable 14. Driver air bag module15. LH side air bag (satellite) sensor
16. Front LH seat belt pre-tensioner 17. Air bag diagnosis sensor unit 18. Front LH side air bag module
WHIA0216E
WHIA0325E
Revision: April 20092010 QX56

SRC-10
< FUNCTION DIAGNOSIS >
OCCUPANT CLASSIFICATION SYSTEM
OCCUPANT CLASSIFICATION SYSTEM
System DiagramINFOID:0000000005147779
Occupant Classification System (OCS)INFOID:0000000005147780
The occupant classification system (OCS) identifies different size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS receives inputs from the occupant classi-
fication sensor (located inside the passenger seat cushion assembly) and belt tension sensor (part of the pas-
senger front seat belt assembly and located at the belt anchor location). Depending on classification of the
passenger, the OCS sends a signal to the air bag diagnos is sensor unit. The air bag diagnosis sensor unit
uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the
passenger front air bag in the event of a collision. Depending on the signals received, the air bag diagnosis
sensor unit can disable the passenger front air bag completely.
NOTE:
In case of customer concern, CONSULT-III can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Conditions
NOTE:
ALHIA0042GB
Front Passenger Seat
(Condition) PASS AIR BAG OFF Indicator
(Status) Passenger Air Bag Status
(Readiness) CONSULT-III Display
Seat occupied OFF Active (enabled)ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
Revision: April 20092010 QX56

SRC-14
< FUNCTION DIAGNOSIS >
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRS Air bag warning lamp examples
DIAGNOSTIC PROCEDURE 2
1. Connect CONSULT-III.
2. Diagnostic code is displayed on "SELF-DIAG [CURRENT]".If no malfunction is detected on "SEL F-DIAG [CURRENT]", but malfunction is detected in "SRS Operation
Check" using the "AIR BAG" warning lamp, the following cases may exist:
• "SELF-DIAG [PAST]" memory might not be erased.
• The SRS system malfunctions intermittently.
Perform DIAGNOSTIC PROCEDURE 4. Refer to SRC-15, "
Self-Diagnosis Function (Without CONSULT-
III)".
“AIR BAG” warning lamp (User mode)SRS condition Reference item
• No malfunction is detected.
• No further action is necessary. —
The system is malfunctioning and
needs to be repaired as indicated. Go to DIAGNOSTIC PROCEDURE
2 that follows (with CONSULT-III) or
SRC-15, "
Trouble Diagnosis without
CONSULT-III" (without CONSULT-
III).
• Air bag is deployed.
• Seat belt pre-tensioner is deployed. Go to COLLISION DIAGNOSIS
SR-
20, "For Frontal Collision" or SR-21,
"For Side and Rollover Collision".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag power supply circuit is mal- functioning.
• SRS air bag warning lamp circuit is
malfunctioning. Go to SRC-89, "
"AIR BAG" Warning
Lamp Does Not Turn Off".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag warning lamp circuit is mal- functioning. Go to SRC-89, "
"AIR BAG" Warning
Lamp Does Not Turn On".
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
Revision: April 20092010 QX56