2006 INFINITI M35 ignition

SIDE CURTAIN AIR BAG MODULE
SRS-43
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SRS
Revision: 2006 January2006 M35/M45
SIDE CURTAIN AIR BAG MODULEPFP:985P0
Removal and InstallationNHS0009F
REMOVAL
CAUTION:
Before servicing, turn ignition switch OFF, disconnect both battery terminal and wait at least 3
minutes.
Do not use air tools or electric tools for servicing.
Always work from the side of air bag module. Do not work from the front of it.
Leave the curtain air bag module with air bag deployment side facing upward.
Do not make an impact to the air bag module by dropping etc. Replace the air bag module if it has
been dropped or sustained an impact.
1. Remove the curtain air bag module.
Remove the headlining. Refer to EI-52, "HEADLINING" .
Remove the side curtain air bag module connector.
NOTE:
For installing / removing side curtain air bag module con-
nector, insert thin screwdriver wrapped in tape into notch,
lift lock and remove connector.
Install connector with lock raised, and push lock into con-
nector.
After installing the connector, make sure that the lock is
pushed securely into it.
Remove the curtain air bag module fixing bolts, then remove the ground bolt.
PHIA1115E
1. Side curtain air bag module A Ground bolt
PHIA0953J
Fixing bolt ( )
: 10.8 Nꞏm (1.1 kgm, 8 ftlb)
Ground bolt A
: 10.8 Nꞏm (1.1 kg
m, 8 ftlb)

CRASH ZONE SENSOR
SRS-45
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Revision: 2006 January2006 M35/M45
CRASH ZONE SENSORPFP:98531
Removal and InstallationNHS0009G
REMOVAL
CAUTION:
Before servicing, turn ignition switch OFF, disconnect both battery terminal and wait at least 3
minutes.
Do not use air tools or electric tools for servicing.
Do not use old fixing nuts after removal; replace with new nuts.
Do not make an impact to the crash zone sensor by dropping etc. Replace the crash zone sensor if
it has been dropped or sustained an impact.
Replace the crash zone sensor of deployed SRS driver air bag and deployed SRS front passenger
air bag.
1. Remove the crash zone sensor.
Remove the front grille. Refer to EI-16, "Removal and Installation" .
Remove the crash zone sensor fixing nuts.
Disconnect the crash zone sensor harness connector.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Be careful not to damage the crash zone 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 bag warning lamp, reset by the self-diagnosis func-
tion and delete the memory by CONSULT
ll.
In case that malfunction is still detected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-19, "
SRS Operation Check" . Fixing nut
: 10.8 Nꞏm (1.1 kg
m, 8 ftlb)
PHIA1116E

SRS-46
SIDE AIR BAG (SATELLITE) SENSOR
Revision: 2006 January2006 M35/M45
SIDE AIR BAG (SATELLITE) SENSORPFP:98830
Removal and InstallationNHS0009H
REMOVAL
CAUTION:
Before servicing, turn ignition switch OFF, disconnect both battery terminal and wait at least 3
minutes.
Do not use air tools or electric tools for servicing.
Do not use old fixing nuts after removal; replace with new nuts.
Do not make an impact to the side air bag (satellite) sensor by dropping etc. Replace the side air
bag (satellite) sensor if it has been dropped or sustained an impact.
Replace the satellite sensor of deployed SRS front side air bag and deployed SRS side curtain air
bag.
1. Remove the side air bag (Satellite) sensor.
Remove front seat belt. Refer to SB-30, "Removal and Installation of Front Seat Belt" .
Remove fixing nuts, then remove side air bag (Satellite) sen-
sor.
Disconnect the side air bag (Satellite) sensor harness con-
nector.
INSTALLATION
Install in the reverse order of removal.
CAUTION:
Be careful not to damage the satellite 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 bag warning lamp, reset by the self-diagnosis func-
tion and delete the memory by CONSULT
ll.
In case that malfunction is still detected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-19, "
SRS Operation Check" . Fixing nut
: 10.8 Nꞏm (1.1 kg
m, 8 ftlb)
PHIA0902J

SRS-48
DIAGNOSIS SENSOR UNIT
Revision: 2006 January2006 M35/M45
DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationNHS0009J
REMOVAL
CAUTION:
Before servicing, turn ignition switch OFF, disconnect both battery terminal and wait at least 3
minutes.
Before disconnecting the air bag sensor unit harness connector, be sure to disconnect the each
harness connector of the air bag module and pre-tensioner seatbelt to prevent air bag deployment
by static electricity and pre-tensioner seatbelt operation.
Do not use air tools or electric tools for servicing.
Do not use old fixing bolts after removal; replace with new bolts.
Do not make an impact to the diagnosis sensor unit by dropping etc. Replace the diagnosis sen-
sor 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-
tensioner.
1. Remove the diagnosis sensor unit.
Disconnect each connector of all air bag modules and pre-tensioner seat belts.
Remove the center console assembly. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
Disconnect diagnosis sensor unit harness connector.
Remove hex bolts and ground bolt, then remove the diagno-
sis sensor unit.
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 bag warning lamp, reset by the self-diagnosis func-
tion and delete the memory by CONSULT
ll.
In case that malfunction is still detected after the above operation, perform self-diagnosis to repair
malfunctions. Refer to SRS-19, "
SRS Operation Check" .
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that the diagnosis sensor unit identification is correct for the
vehicle as equipped.Hex bolts
: 24.5 Nꞏm (2.5 kg
m, 18 ftlb)
Ground bolt A
: 6.9 Nꞏm (0.7kg
m, 61 inlb)
PHIA0869J
Specification ECU DISCRIMINATED No.
2WD
AW DModels with driver and passenger air bags, seat belt pre-tensioner, side air bags and curtain air
bagsFA 8 E

STC-4
[EPS]
SYSTEM DESCRIPTION
Revision: 2006 January2006 M35/M45
Fail-Safe FunctionNGS000DW
When the fail-safe function operate, it controls power steering sole-
noid valve by the engine speed as shown in the figure and maintains
the steering force.
FAIL-SAFE INPUT/CANCEL CONDITIONS
CAUTION:
Fail-safe function is activated when the engine runs at 1,500 rpm or higher for 10 seconds with the vehicle stopped. This is
normal and the fail-safe function is automatically deactivated when a vehicle speed signal of 2 km/h (1.2 MPH) or higher is
input or the ignition switch is turned OFF.
SGIA0411E
Input conditions Cancel conditions
When vehicle runs at an engine speed of 1,500 rpm or higher and no vehicle speed signal
is received for 10 seconds.
A vehicle speed of 2 km/h (1.2 MPH) or
more is input.
Turn the ignition switch ON after turn-
ing it OFF. The continuous vehicle speed signal 30 km/h (19 MPH) or more suddenly drops to less
than 2 km/h (1.2 MPH) within 1.4 seconds.

STC-8
[EPS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Control Unit Input/Output Signal StandardNGS000E0
STANDARD BY CIRCUIT TESTER AND OSCILLOSCOPE
CAUTION:
When checked using a circuit tester for voltage measurement, connector terminals should not be
forcefully extended.
Te r m i n a l
Measuring
pointMeasuring condition Standard
+ (wire color) –
1 (GR)
GroundIGN Ignition switch ON. Battery voltage (Approx. 12 V)
2 (B) Ground — —
3 (L)Vehicle speed
signal
(2-pulse)At 40 km/h (25MPH)
5 (Y)Engine
speed signalAt idle after warming up
At approx. 2,000 rpm
7 (G)Power steer-
ing solenoid
valveNormal
(Vehicle speed)0 km/h (0 MPH) Approx. 4.4 - 6.6 V
100 km/h (62 MPH) Approx. 2.4 - 3.6 V
In fail-safe mode
(Engine speed)0 - 1,500 rpm Approx. 4.4 - 6.6 V
1,500 - 3,000 rpm Approx. 3.5 V
More than 3,000 rpm Approx. 2.1 V
ELF1080D
PBIA3654J
PBIA3655J

TROUBLE DIAGNOSIS
STC-9
[EPS]
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STC
Revision: 2006 January2006 M35/M45
For Fast and Accurate Trouble DiagnosisNGS000E1
Check the following items with the vehicle stopped
Is air pressure and size of tires proper?
Is the specified part used for the steering wheel?
Is control unit a genuine part?
Are there any fluid leakage from steering gear assembly, power steering oil pump, and hydraulic pipes,
etc? Refer to PS-8, "
POWER STEERING FLUID" .
Is the fluid level proper? Refer to PS-8, "POWER STEERING FLUID" .
Is the wheel alignment adjusted properly? Refer to FSU-19, "SERVICE DATA AND SPECIFICATIONS
(SDS)" (2WD), FSU-36, "SERVICE DATA AND SPECIFICATIONS (SDS)" (AWD).
Are there any damage or modification to suspension or body resulting in increased weight or altered
ground clearance?
Check each link installation condition of suspension and axle.
Check each connector connection condition.
Check the following items while driving the vehicle
Check conditions when the malfunction occurred (5W 1H).
Is the engine condition normal?
Basic InspectionNGS000E2
POWER SUPPLY CIRCUIT TERMINAL LOOSENESS AND BATTERY
Check battery terminals for looseness on both positive and negative ones and ground connection. Also make
sure that battery voltage does not drop.
Inspection: Power Steering Control Unit Power Supply Circuit and GroundNGS000E3
1. CHECK POWER STEERING CONTROL UNIT CONNECTOR
Turn ignition switch OFF, disconnect power steering control unit harness connector, and check terminal for
deformation, disconnection, looseness, etc.
OK or NG
OK >> GO TO 2.
NG >> Connector terminal connection is loose, damaged, open, or shorted. Repair or replace the termi-
nal.
2. CHECK POWER STEERING CONTROL UNIT GROUND CIRCUIT
Disconnect power steering control unit harness connector M8, and
then check continuity between power steering control unit harness
connector M8 and ground.
OK or NG
OK >> GO TO 3.
NG >> Ground circuit open or shorted. Repair or replace any
inoperative parts. Terminal 2 – Ground : Continuity exist.
SGIA1231E

STC-10
[EPS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
3. CHECK POWER STEERING CONTROL UNIT POWER SUPPLY CIRCUIT
Turn ignition switch ON, and then check voltage between power
steering control unit harness connector M8 and ground.
OK or NG
OK >> Power supply and ground circuit are normal.
NG >> Power supply circuit open or shorted. Repair or replace
any inoperative parts.
Symptom: The Steering Force Does Not Change Smoothly According to the
Vehicle Speed
NGS000E4
Heavy steering force with the static steering/light steering force during high-speed driving
1. POWER STEERING SOLENOID VALVE SIGNAL INSPECTION 1
1. Start engine.
2. Change the vehicle speed from 0 to 100 km/h (0 to 62 MPH)
slowly, and then check voltage between power steering control
unit harness connector M8 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 7.
2. POWER STEERING SOLENOID VALVE SIGNAL INSPECTION 2
1. Activate fail-safe function by running the engine speed at 1,500 rpm or higher for 10 seconds with the
vehicle stopped.
2. Change the engine speed to the idling, to approximately 1,600
rpm, and to approximately 3,000 rpm slowly, and then check
voltage between power steering control unit harness connector
M8 and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 8.
3. CHECK POWER STEERING SOLENOID VALVE CONNECTOR
Turn ignition switch OFF, disconnect power steering solenoid valve harness connector, and check terminal for
deformation, disconnection, looseness, etc.
OK or NG
OK >> GO TO 4.
NG >> Harness or connector open or shorted. Repair or replace any inoperative parts. Terminal 1 – ground : Battery voltage (Approx. 12 V)
SGIA1232E
Terminal 7 – ground : The voltage has changed from
approximately 4.4 - 6.6 V to
approximately 2.4 - 3.6 V
SGIA1233E
Terminal 7 – ground : The voltage has changed from
approximately 5.5 V to approxi-
mately 2.1 V step-by-step.
SGIA1233E