sensor INFINITI FX35 2004 Service Manual

TROUBLE DIAGNOSIS
BRC-43
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
3. CHECK STEERING ANGLE SENSOR HARNESS
1. Check CAN communication system. Refer to BRC-53, "
Inspection 14: CAN Communication System" .
2. Turn ignition switch OFF and disconnect steering angle sensor connector.
3. Check continuity between steering angle sensor harness con-
nector M14 and ground.
4. Check voltage between steering angle sensor harness connec-
tor M14 and ground.
OK or NG
OK >> GO TO 4.
NG >> If the open or short in harness, repair or replace harness.
4. CHECK STEERING WHEEL PLAY
Check steering wheel play. Refer to PS-10, "
CHECKING STEERING WHEEL PLAY" .
OK or NG
OK >> GO TO 5
NG >> Adjustment steering wheel play.
SFIA1189E
Steering angle sensor
(Harness connector M14)Ground Continuity
2 (B) — Yes
SFIA1190E
Steering angle sensor
(Harness connector M14)GroundVoltage (V)
(Approx.)
3 (G/R) — 12V

BRC-44
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
5. PERFORM DATA MONITOR
1. Connect steering angle sensor and ABS actuator and electric unit (control unit) connectors.
2. Perform “DATA MONITOR” of the “STEERING ANGLE SIGNAL” to check if the status is normal.
OK or NG
OK >> Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
NG >> Replace steering angle sensor and adjust neutral position of steering angle sensor. Refer to BRC-
6, "Adjustment of Steering Angle Sensor Neutral Position" .
Inspection 6: Yaw Rate/Side G-Sensor (2WD model), Yaw Rate/Side/Decel G-
sensor (AWD models) System
AFS001SY
DTC C1145, C1146, C1113
CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. May cause the G-sensor system
indicate a malfunction. However, this is not a malfunction, if normal operation can be resumed after
restarting engine.
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
CAUTION:
When on a turntable, such as at a parking structure entrance, or when on a moving object with engine
running, VDC OFF indicator lamp might turn on and self-diagnosis using CONSULT-II the yaw rate sen-
sor system might be displayed, but in this case there is no malfunction in yaw rate sensor system. As
soon as vehicle leaves turntable or moving object, restart engine to return the system to normal.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect G-sensor connector and ABS actuator and electric unit (control unit) connector and check ter-
minals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace
terminal.
2. Reconnect connectors and re-perform a ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
Steering condition Data monitor
Straight-ahead -3.5 deg - +3.5 deg
Turn wheel to the right by 90°. Approx. -90 deg
Turn wheel to the left by 90°. Approx. +90 deg
Self-diagnostic results
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR (AWD model)

TROUBLE DIAGNOSIS
BRC-45
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
3. CHECK G-SENSOR HARNESS
1. Turn ignition switch OFF and disconnect G-sensor connector
and ABS actuator and electric unit (control unit) connector.
2. Check continuity between ABS actuator and electric unit (control
unit) harness connector E56 and G-sensor harness connector
M79 (2WD model) or M71 (AWD model).
OK or NG
OK >> GO TO 4.
NG >> If the open or short in harness, repair or replace harness.
4. CHECK G-SENSOR
1. Connect G-sensor connector and ABS actuator and electric unit (control unit) connector.
2. Use CONSULT-II “DATA MONITOR” to check if G-sensor are normal.
OK or NG
OK >> Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
NG >> Replace malfunctioning G-sensor, and then re-perform self-diagnosis for ABS actuator and elec-
tric unit (control unit).
SFIA1192E
ABS actuator and electric unit
(control unit)
(Harness connector E56)G-sensor (Harness con-
nector M79 or M71)Continuity
6 (Y) 3 (Y/B) Yes
24 (B) 5 (B/Y) Yes
25 (R/Y) 1 (R/Y) Yes
29 (R/G) 2 (R/G) Yes
Vehicle statusYaw rate sensor
(Data monitor stan-
dard)Side G sensor
(Data monitor stan-
dard)Decel G sensor
(Data monitor stan-
dard) (AWD model)
When stopped –4 to +4 deg/s
–1.1 to +1.1 m/s
2–0.11 to +0.11 G
Right turn Negative value Negative value –
Left turn Positive value Positive value –
Speed up – – Negative value
Speed down – – Positive value

BRC-52
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Inspection 12: When “ST ANG SEN SIGNAL” Appears on Self-Diagnosis
Results Display
AFS0021V
DTC C1144
INSPECTION PROCEDURE
1. CHECK SELF DIAGNOSIS RESULTS (1)
Check self-diagnosis results.
Dose anything besides
“ST ANG SEN SIGNAL” appear on self-diagnosis results display?
YES >> Inspect and repair the indicated items. Then perform self-diagnosis again.
NO >> Perform adjustment of steering angle sensor neutral position. Then GO TO 2.
2. CHECK SELF DIAGNOSIS RESULTS (2)
Turn ignition switch OFF and ON to erase self-diagnosis results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.
Dose anything appear on self-diagnosis results display?
YES >> Replace steering angle sensor. Then perform adjustment of neutral position and perform self-
diagnosis again.
NO >> INSPECTION END.
Inspection 13: When “DECEL G SEN SET” Appears on Self-Diagnosis Results
Display (AWD Model)
AFS0021W
DTC C1160
INSPECTION PROCEDURE
1. CHECK SELF DIAGNOSIS RESULTS (1)
Check self-diagnosis results.
Dose anything besides
“DECEL G SEN SET” appear on self-diagnosis results display?
YES >> Inspect and repair the indicated items. Then perform self-diagnosis again.
NO >> Perform calibration of Decel G Sensor. Then GO TO 2.
2. CHECK SELF-DIAGNOSIS RESULTS (2)
Turn ignition switch OFF and ON to erase self-diagnosis results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.
Dose anything appear on self-diagnosis results display?
YES >> Replace Yaw rate/side/decel G sensor. Then perform adjustments of neutral position and perform
self-diagnosis again.
NO >> INSPECTION END.
Self-diagnosis results
ST ANG SEN SIGNAL
Self-diagnosis results
DECEL G SEN SET

TROUBLE DIAGNOSIS
BRC-53
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
Inspection 14: CAN Communication SystemAFS002Q9
DTC U1000, C1156
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is
“CAN COMM CIRCUIT” or “ST ANG SEN COM CIR” displayed in the self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-4, "Precautions When Using CONSULT-II" .
NO >> Connector terminal connection is loose, damaged, open, or shorted.
Component InspectionAFS001T6
VDC OFF SWITCH

Turn ignition switch OFF and disconnect VDC OFF switch con-
nector, and check continuity between VDC OFF switch connec-
tor M32 terminals 1 and 2.
Symptom 1: Excessive ABS Function Operation FrequencyAFS001T7
1. FRONT AND REAR AXLE INSPECTION
Make sure there is no excessive looseness in the front and rear axles.
OK or NG
OK >> GO TO 2.
NG >> Check front or rear axle system.
2. WHEEL SENSOR INSPECTION
Perform following inspection for wheel sensor:

Sensor mount and damage inspection

Sensor rotor mount and damage inspection

Sensor connector connection inspection

Sensor harness inspection
OK or NG
OK >> GO TO 3.
NG >> Sensor or sensor rotor replacement
3. ABS WARNING LAMP DISPLAY CHECK
Make sure warning lamp turns off approximately 2 sec. After turn ignition switch ON or when driving.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-27, "
SELF-DIAGNOSIS" . 1 -2 :Continuity should exist when pushing
switch.
continuity should not exist when releasing
switch.
SFIA1203E

WHEEL SENSORS
BRC-57
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
WHEEL SENSORSPFP:47910
Removal and InstallationAFS001Z3
REMOVAL
1. Disconnect wheel sensor connector.
2. Remove wheel sensor mounting bolts, grommets (front sensor) and clip.
3. Remove wheel sensor.
CAUTION:
Be careful of the following when installing sensor.

As much as possible, avoid rotating sensor when removing it. Pull sensors out without pulling on
sensor harness.

Take care to avoid damaging sensor edges or rotor teeth. Remove wheel sensor first before
removing front wheel hub and bearing assembly and rear final drive. This is to avoid damage to
sensor wiring and loss of sensor function.
INSTALLATION
To install, follow procedure for removal in reverse order.
CAUTION:
Be careful of the following when installing sensor. Tighten installation bolts to specified torques.

When installing, make sure there is no foreign material such as iron chips on pick-up and mount-
ing hole of sensor. Make sure no foreign material has been caught in the sensor rotor. Remove
any foreign material and clean the mount.

When installing front sensor, be sure to press rubber grommets in until they lock at the three loca-
tions shown in the figure (2 at shock absorbers and 1 at body panel). When installed, harness
must not be twisted. White line on harness must be visible from front.
PFIA0600E

BRC-58
[VDC/TCS/ABS]
WHEEL SENSORS
Revision: 2004 November 2004 FX35/FX45

When installing rear sensor, attach harness at rear suspension member securely. Besides, har-
ness must not be twisted when installed.

SENSOR ROTOR
BRC-59
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45
SENSOR ROTORPFP:47970
Removal and InstallationAFS001Z4
REMOVAL
Front
Sensor rotor cannot be disassembled. To replace sensor rotor, replace wheel hub and bearing assembly.
Refer to FA X - 4 , "
Removal and Installation" (2WD model), FA X - 1 0 , "Removal and Installation" (AWD model).
Rear

Follow procedure below to remove rear sensor rotor.
–Remove side flange. Refer to RFD-9, "SIDE OIL SEAL" .
–Using a bearing replacer and puller, remove sensor rotor from side flange.
INSTALLATION
Front
Sensor rotor cannot be disassembled. To replace sensor rotor, replace wheel hub and bearing assembly.
Refer to FA X - 4 , "
Removal and Installation" (2WD model), FA X - 1 0 , "Removal and Installation" (AWD model).
Rear

Follow procedure below to install rear sensor rotor.
–Using a drift (special service tool), press rear sensor rotor onto
side flange.
–Install side flange. Refer to RFD-9, "SIDE OIL SEAL" .
BRG1210D

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-61
[VDC/TCS/ABS]
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BRC
Revision: 2004 November 2004 FX35/FX45

After installing vehicle harness connector in the actuator, make sure connector is securely locked.

When replacing ABS actuator and electric unit (control unit), calibrate Steering angle sensor neu-
tral position and Decel G sensor. Refer to BRC-6, "
ON-VEHICLE SERVICE" .
NOTE:

After performing above works, calibrate decel G-sensor (AWD model). Refer to BRC-6, "Calibration of
Decel G-sensor (AWD Model)" .

In the case that ABS actuator and electric unit (control unit) are replaced, make sure to adjust position of
steering angle sensor. Refer to BRC-6, "
Adjustment of Steering Angle Sensor Neutral Position" .

BRC-62
[VDC/TCS/ABS]
G SENSOR
Revision: 2004 November 2004 FX35/FX45
G SENSORPFP:47930
Removal and InstallationAFS001TG
REMOVAL
1. Remove center console. Refer to IP-12, "(H) Center Console" .
2. Disconnect G-sensor harness connector.
3. Remove G-sensor mounting bolts. Then remove G-sensor from
vehicle.
CAUTION:

Do not drop or strike G-sensor, because it has little endur-
ance to impact.

Do not use power tool etc., because G-sensor is weak for
the impact.
INSTALLATION
To install, follow procedure for removal in reverse order.
CAUTION:

Do not drop or strike G-sensor, because it has little endurance to impact.
NOTE:

After performing above works, calibrate decel G-sensor (AWD model). Refer to BRC-6, "Calibration of
Decel G-sensor (AWD Model)" .
PFIA0602E