2008 INFINITI FX35 sensor

SRS-44
< SERVICE INFORMATION >
DIAGNOSIS SENSOR UNIT
DIAGNOSIS SENSOR UNIT
Removal and InstallationINFOID:0000000001327771
WARNING:
 Before servicing SRS, turn ignition switch OFF, disconnect both ba ttery cables and wait at least 3
minutes.
 Do not use air tools or el ectric tools for servicing.
REMOVAL
1. Disconnect each harness connector for the ai r bag module and seat belt pre-tensioner.
2. Remove center console. Refer to IP-11, "
Removal and Installation".
3. Disconnect diagnosis sensor unit connector.
4. Remove TORX bolts from the diagnosis sensor unit.
CAUTION:
 Do not use old TORX bolts. Replace with new ones.
 Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible things of damage, replace with new one.
 Replace diagnosis sensor unit if it has been dropped or sustained an impact.
 Replace the diagnosis sensor unit of deployed SRS air bag and deployed SRS front seat belt pre-ten-
sioner.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
 Be careful not to damage the diagnosis sensor harness.
 After the work is completed, make sure no system malfunction is detected by air bag warning lamp.
 In case that malfunction is detected by the air ba g warning lamp, reset by the self-diagnosis function
and delete the memory by CONSULT −III.
 In case that malfunction is still de tected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-23, "
SRS Operation Check".
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that t he diagnosis sensor unit identification is correct for the
vehicle as equipped.
PHIA0315E
Specification ECU DISCRIMINATED No.
Models with driver and passenger air bags, seat belt pre-tensioner, side air bags and curtain air bags FB04
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SRS-46
< SERVICE INFORMATION >
OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT
Removal and InstallationINFOID:0000000001327772
The occupant classification system c ontrol unit, seat pressure sensor, and bladder are an integral part of the
front passenger seat cushion and are replaced as an assembly. Refer to SE-89, "
Removal and Installation".
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COLLISION DIAGNOSISSRS-47
< SERVICE INFORMATION >
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COLLISION DIAGNOSIS
For Frontal CollisionINFOID:0000000001327773
To repair the SRS, perform the following steps.
When SRS (except the front side air bag and sidecurt ain air bag modules) is activated in a collision:
1. Replace the diagnosis sensor unit.
2. Remove the air bag modules (except the front side air bag modulesand side curtain air bag modules),
crash zone sensor assembly, bracket andseat belt pre-tensioner assemblies.
3. Check the SRS components using the table below:
- Replace any SRS components showing visible signs of damage (dents,cracks and deformation).
4. Install new air bag modules (except the front side air bag modules and side curtain air bag modules) crash
zone sensor assembly, bracket and seat belt pre-tensioner assemblies.
5. Conduct self-diagnosis using CONSULT-III or “AIR BAG”warning lamp. Refer to SRS-23, "
SRS Operation
Check" for details. Ensure entire SRS operates properly.
When SRS is not acti vated in a collision:
1. Check the SRS components using the table below:
- Replace any SRS components showing visible signs of damage (dents, cracks and deformation).
2. Conduct self-diagnosis using CONSULT-III or “AIR BAG” warning lamp. Refer to SRS-23, "
SRS Operation
Check" for details. Ensure entire SRS operates properly.
When only one front air bag modu le is activated in a collision:
1. Replace the following components:
- Diagnosis sensor unit
- Crash zone sensor
- Activated front air bag and seat belt pre-tensioner.
2. Check the other SRS components using the table below. (Refer to “SRS is NOT activated”.)
- Replace any SRS components showing visible signs of damage (dents, cracks and deformation).
3. Conduct self-diagnosis using CONSULT-III or “AIR BAG” warning lamp. Refer to SRS-23, "
SRS Operation
Check" for details. Ensure entire SRS operates properly.
Only one front air bag may inflate a crash, depending on t he crash severity and whether the front occupants
are belted or unbelted. This does not indicate improper performance of the system. Perform self-diagnosis to
make sure the entire SRS operates properly.
SRS INSPECTION (FOR FRONTAL COLLISION)
Part SRS is activated SRS is NOT activated
Driver airbag
module If the Driver airbag has deployed:
REPLACE.
Install with new fasteners. If the Driver air bag has NOT been activated:
[same text as in current manual]
Passenger front
airbag module If the Passenger front airbag has deployed:
REPLACE.
Install with new fasteners. If the Passenger front air bag has NOT been activated:
[same text as in current manual]
Crash zone
sensor If any of the front airbags or seat belt pre-
tensionsers have been activated:
REPLACE the crash zone sensor and bracket
with new fasteners. If the front airbags or seat belt pre-tensionsers have NOT
been activated:
[same text as in current manual]
Seat belt pre-ten-
sioner assemblies If the driver or passenger Seat belt pre-tension-
er has been activated:
REPLACE the seat belt pre-tensioner
assemblies with new fasteners. If the pre-tensioners have NOT been activated:
[same text as in current manual]
Diagnosis sensor
unit If any of the SRS components have been
activated:
REPLACE the Diagnosis sensor unit.
Install with new fasteners. If none of the SRS components have been activated:
[same text as in current manual]
Steering wheel [same text as in current manual]
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SRS-48
< SERVICE INFORMATION >
COLLISION DIAGNOSIS
For Side Collision
INFOID:0000000001327774
WHEN THE SIDE AIR BAG IS ACTIVATED IN THE SIDE COLLISION:
1. Replace the following components:
- All parts of front seatback (including front seatba ck frame) with front side air bag module (on the side on
which front side air bag is activated)
- Curtain air bag module (on the side on which side curtain airbag is activated)
- Diagnosis sensor unit
- Satellite sensor (on the side on which side air bag and side curtain air bag are activated)
2. Check the SRS components and the related parts using the followingtable.
- Replace any SRS components and the related parts showing visiblesigns of damage (dents, cracks, deformation).
3. Conduct self-diagnosis using CONSULT-III or “AIR BAG”warning lamp. Refer to SRS-23, "
SRS Operation
Check". Ensure entire SRS operates properly.
WHEN SRS IS NOT ACTIVATED IN THE SIDE COLLISION:
1. Check the SRS components and the related parts using the followingtable.
- Replace any SRS components and the related parts showing visiblesigns of damage (dents, cracks,
deformation).
2. Conduct self-diagnosis using CONSULT-III or “AIR BAG”warning lamp. Refer to SRS-23, "
SRS Operation
Check". Ensure entire SRS operates properly.
SRS INSPECTION (FOR SIDE COLLISION)
Spiral cable If the Driver airbag has deployed:
REPLACE the spiral cable. If the Driver airbag has not deployed:
[same text as in current manual]
Harness and con-
nectors 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 damaged section of harness. Do not repair, splice or modify any SRS harness.
Instrument panel 1. Visually check instrument panel for damage. 2. If no damage is found, reinstall the instrument panel.
3. If damaged—REPLACE the instrument panel with bolts.
Part SRS is activated SRS is NOT activated
Part
Front side air bag and
side curtain air bag are activated Front side air bag and side curtain air bag are NOT activated
LH or RH side curtain
air bag module REPLACE the side
curtain air bag mod-
ule.
(Repair the center pil-
lar inner, etc. before
installing new one if
damaged.)1. Check for visible signs of damage (dents, tears, deformation)of the center pillar
on the collision side.
2. If damaged—Remove the side curtain air bag module.
3. Check for visible signs of damaged (tears etc.) of the LH or 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 LH or RH side curtain air bag module with new bolts.
6. If damaged—REPLACE the LH or RH side curtain air bag module with new bolts.
Front LH or RH side
air bag module REPLACE all parts of
seatback with de-
ployed front side air
bag module.1. Check for visible signs of damage (dents, tears, deformation) of the seatback on
the collision side.
2. Check harness and connectors for damage, and terminals for deformities.
3. If damaged—REPLACE the front seatback assembly. Air bag must be deployed before disposal.
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COLLISION DIAGNOSISSRS-49
< SERVICE INFORMATION >
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LH or RH side air bag
(Satellite) sensor REPLACE the side air
bag (Satellite) sensor
on the collision side
with new nuts.
(Repair the center pil-
lar inner, etc. before
installing new one if
damaged.)1. Remove the LH or RH side air bag (Satellite) sensor on the collision side. Check
harness connectors for damage, terminals for deformities, and harness for bind-
ing.
2. Check for visible signs of damage (dents, cracks, deformation) of the LH or RH side air bag (Satellite) sensor.
3. Install the LH or RH side air bag (Satellite) sensor to check fit.
4. If no damage is found, reinstall the LH or RH side sir bag (Satellite) sensor with
new nuts.
5. If damaged—REPLACE the LH or RH side air bag (Satellite) sensor with new
nuts.
Diagnosis sensor unit REPLACE the diag- nosis sensor unit with
the new bolts.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 withnew bolts and
ground bolt.
4. If damaged—REPLACE the diagnosis sensor unit with new boltsand ground bolt.
Seat belt pre-tension-
er assembly 1. Check if the seat belt can be extended smoothly.
If the seat belt cannot be extended smoothly,
- Check for deformities of the center pillar inner.
- If the center pillar inner has no damage, REPLACE the seat beltpre-tensioner assembly.
2. Remove the seat belt pre-tensioner assembly on the collision side.Check harness cover and connectors for damage, terminals for deformities,and harness for binding.
3. Check for visible signs of damage (dents, cracks, deformation)of the seat belt pre-tensioner assembly.
4. Check seat belt adjuster for damage.
5. If no damage is found, reinstall the seat belt pre-tensioner assembly.
6. If damaged—REPLACE the seat belt pre-tensioner assemblywith new bolts.
Seat with front side air
bag REPLACE all parts of
front seatback (includ-
ing front seatback
frame)1. Visually check the seat on the collision side.
2. Remove the seat on the collision side and check the followingfor damage and de-
formities.
- Harness, connectors and terminals
- Frame and recliner (for front and rear seat), and also adjusterand slides (for front
seat)
3. If no damage is found, reinstall the seat.
4. If damaged—REPLACE the damaged seat parts using new bolts.
Center inner pillar 1. Check the center inner pillar on the collision side for damage(dents, cracks, deformation). 2. If damaged—REPAIR the center inner pillar.
Trim/headlining 1. Check for visible signs of damage (dents, cracks, deformation)of the interior trim on the collision side. 2. If damaged—REPLACE the damaged trim parts.
Part
Front side air bag and
side curtain air bag
are activated Front side air bag and side curtain air bag are NOT activated
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AWD SYSTEMTF-11
< SERVICE INFORMATION >
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AWD SYSTEM
Power Transfer DiagramINFOID:0000000001327431
System DescriptionINFOID:0000000001327432
DESCRIPTION
 Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
 Makes possible stable driving, with no wheel sp in, on snowy roads or other slippery surfaces.
 On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close to
rear-wheel drive.
 Sensor inputs determine the vehicle's turning conditi on, and in response tight cornering/braking are con-
trolled by distributing optimum torque to front wheels.
NOTE:
 When driving, if there is a large difference between front and rear wheel speed which continues for a long
time, fluid temperature of drive system parts becom es too high and AWD warning lamp flashes rapidly.
(When AWD warning lamp flashes, vehicle changes to r ear-wheel drive conditions.) Also, optional distribu-
tion of torque sometimes becomes rigid before lamp flashes rapidly, but it is not malfunction.
 If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop and AWD system will be restored.
 When driving, AWD warning lamp may flash slowly if ther e is a significant difference in diameter of the tires.
At this time, vehicle performance is not fully avail able and cautious driving is required. (Continues until
engine is turned OFF.)
 If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.
 When the difference of revolution speed between the front and rear wheel mode the shift occasionally
changes to direct 4-wheel driving conditions automatically. This is not malfunction.
ELECTRIC CONTROLLED COUPLING
Operation Principle
SDIA1611E
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AWD SYSTEMTF-13
< SERVICE INFORMATION >
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SchematicINFOID:0000000001327433
COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationINFOID:0000000001327434
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
For details, refer to LAN-43, "
CAN System Specification Chart".
SDIA2160E
Component parts Function
AWD control unit  Controls driving force distribution by signals from each sensor and switch from rear wheel driving
mode (0:100) to AWD mode (50:50).
 2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to front final drive.
AWD warning lamp  Illuminates if malfunction is detected in electrical system of AWD system.
 There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
 There are 2 blinks in 1 second if load is still applied to driving parts.
ABS actuator and electric unit
(control unit) Transmits the following signals via CAN communication to AWD control unit.
 Vehicle speed signal
 Stop lamp switch signal (brake signal)
ECM Transmits the following signals via CAN communication to AWD control unit.
 Accelerator pedal position signal
 Engine speed signal
Unified meter and A/C amp. Transmits conditions of parking brake switch via CAN communication to AWD control unit.
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TF-20
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Trouble Diagnosis Chart by Symptom
INFOID:0000000001327440
If AWD warning lamp turns ON, perform self-diagnosis. Refer to TF-21, "CONSULT-III Function (ALL MODE AWD/4WD)".
NOTE:
Light tight-corner braking symptom may occur depending on driving conditions. This is not malfunction.
AWD Control Unit Input/Output Signal Reference ValueINFOID:0000000001327441
AWD CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-III
Symptom Condition Check item Reference page
AWD warning lamp does not turn ON when
the ignition switch is turned to ON.
(AWD warning lamp check) Ignition switch: ONCAN communication line
TF-30
Unified meter and A/C amp.
Unified meter control unit
AWD warning lamp does not turn OFF sev-
eral seconds after engine started. Engine runningCAN communication line
TF-30
Power supply and ground for AWD con-
trol unit
Unified meter and A/C amp.
Unified meter control unit
AWD solenoid
AWD actuator relay (integrated in AWD
control unit)
Wheel sensor
Heavy tight-corner braking symptom occurs
when the vehicle is driven and the steering
wheel is turned fully to either side after the
engine is started. (See NOTE.)  While driving
 Steering wheel is
turned fully to either
sides CAN communication line
TF-32
Accelerator pedal position signal
AWD solenoid
Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)
Vehicle does not enter AWD mode even
though AWD warning lamp turned to OFF. While drivingAWD solenoid
TF-33
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
While driving, AWD warning lamp flashes
rapidly. (When flashing in approx. 1 minute
and then turning OFF.)
Rapid flashing: 2 times/second While drivingProtection function is activated due to
heavy load to electric controlled cou-
pling. (AWD system is not malfunction-
ing. Also, optional distribution of torque
sometimes becomes rigid before lamp
flashes rapidly, but it is not malfunction.) TF-33
While driving, AWD warning lamp flashes
slowly. (When continuing to flash until turn-
ing ignition switch OFF)
Slow flashing: 1 time/2 seconds While driving
 Vehicle speed: 20 km/h
(12 MPH) or more Tire size is different between front and
rear of vehicle.
TF-33
Monitored item [Unit] Content Condition Display value
FR RH SENSOR [km/h] or [mph] Wheel speed (Front wheel
right)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.
Approximately equal to
the indication on speed-
ometer (Inside of
±10%)
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