2006 INFINITI M35 Factory Service Manual

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Page 5417 of 5621

INFINITI M35 2006 Factory Service Manual STC-2Revision: 2006 January2006 M35/M45 Inspection 2: Motor Power Supply System ............. 35
Inspection 3: RAS Motor Output Malfunction ......... 37
Inspection 4: Vehicle Speed Signal .........

Page 5418 of 5621

INFINITI M35 2006 Factory Service Manual SYSTEM DESCRIPTION
STC-3
[EPS]
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STC
Revision: 2006 January2006 M35/M45
[EPS]SYSTEM DESCRIPTIONPFP:00000
ComponentsNGS000DT
Components (Models with Rear Active Steer)NGS000DU
Elec

Page 5419 of 5621

INFINITI M35 2006 Factory Service Manual 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 spe

Page 5420 of 5621

INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS
STC-5
[EPS]
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Revision: 2006 January2006 M35/M45
TROUBLE DIAGNOSISPFP:00004
How to Perform Trouble DiagnosisNGS000DX
BASIC CONCEPT
The most important point t

Page 5421 of 5621

INFINITI M35 2006 Factory Service Manual STC-6
[EPS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Wiring Diagram — EPS — NGS000DZ
TGWT0023E

Page 5422 of 5621

INFINITI M35 2006 Factory Service Manual TROUBLE DIAGNOSIS
STC-7
[EPS]
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Revision: 2006 January2006 M35/M45
TGWT0024E

Page 5423 of 5621

INFINITI M35 2006 Factory Service Manual 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 tes

Page 5424 of 5621

INFINITI M35 2006 Factory Service Manual 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 pr

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

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