sensor INFINITI FX35 2008 Service Manual

BRC-44
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
5.CHECK PRESSURE SENSOR CONNECTOR
1. Disconnect pressure sensor connector and ABS actuator and electric unit (control unit) connector, check
terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.
2. Reconnect connectors and perform AB S actuator and electric unit (control unit) self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 6.
6.CHECK PRESSURE SENSOR HARNESS
1. Turn ignition switch OFF and disconnect pressure sensor con- nector E53 and ABS actuator and electric unit (control unit) con-
nector E56.
2. Check continuity between ABS ac tuator and electric unit (control
unit) harness connector and pressure sensor harness connec-
tor.
OK or NG
OK >> GO TO 7.
NG >> If the open or short in harness, repair or replace harness.
7.CHECK PRESSURE SENSOR
1. Connect pressure sensor connector and ABS act uator and electric unit (control unit) connector.
2. Perform “DATA MONITOR” of the “PRESS SE NSOR” to check if the status is normal.
OK or NG
OK >> INSPECTION END
NG >> Pressure sensor is damaged or malfunctioning, replace pressure sensor.
DTC C1143 ST ANG SEN CIRCUITINFOID:0000000001327681
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is the above displayed in the self-diagnosis item?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK CONNECTOR
1. Disconnect steering angle sensor connector and ABS ac tuator and electric unit (control unit) connector
and check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.
ABS actuator and electric unit (control unit) Pressure sensor Continuity
19 1 Ye s
20 2
18 3
SFIA1188E
Condition Data monitor display
When brake pedal is depressed. 0 to 170 bar
When brake pedal is released. Approx. 0 bar
Self-diagnostic results
ST ANG SEN CIRCUIT
ST ANG SEN COM CIR
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TROUBLE DIAGNOSIS FOR SYSTEMBRC-45
< SERVICE INFORMATION > [VDC/TCS/ABS]
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2. Reconnect connectors and perform an ABS actuator and electric unit (control unit) self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3.CHECK STEERING ANGLE SENSOR HARNESS
1. Check CAN communication circuit. Refer to BRC-48, "
DTC U1000 CAN COMM CIRCUIT".
2. Turn ignition switch OFF and disconnec t steering angle sensor connector M14.
3. Check continuity between steering angle sensor harness con- nector and ground.
4. Check voltage between steering angle sensor harness connec- tor and ground.
OK or NG
OK >> GO TO 4.
NG >> If the open or short in harness, repair or replace har- ness.
4.CHECK STEERING WHEEL PLAY
Check steering wheel play. Refer to PS-9, "
On-Vehicle Inspection and Service".
OK or NG
OK >> GO TO 5
NG >> Adjust steering wheel play.
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 ANGL E SIGNAL” to check if the status is normal.
OK or NG
OK >> Perform ABS actuator and electric unit (control unit) self-diagnosis again.
NG >> Replace steering angle sensor and adjust neutra l position of steering angle sensor. Refer to BRC-
8, "Adjustment of Steering Angle Sensor Neutral Position".
DTC C1144 ST ANG SEN SIGNALINFOID:0000000001327688
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS (1)
Check self-diagnostic results.
Steering angle sensor Ground Continuity
2—Yes
SFIA1189E
Steering angle sensor Ground Voltage
3— Battery voltage
(Approx. 12 V)
SFIA1190E
Steering condition Data monitor display
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
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BRC-46
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Does anything besides “ST ANG SEN SIGNAL” appear on self-diagnostic 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-diagnos tic results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.
Does anything appear on self-diagnostic results display?
YES >> Replace steering angle sensor. Then perform adj ustment of neutral position and perform self-
diagnosis again.
NO >> INSPECTION END
DTC C1145 YAW RATE SENSORINFOID:0000000001569717
Refer to BRC-38, "DTC C1113 G-SENSOR".
DTC C1146 SIDE G-SEN CIRCUITINFOID:0000000001569718
Refer to BRC-38, "DTC C1113 G-SENSOR".
DTC C1155 BR FLUID LEVEL LOWINFOID:0000000001327687
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. Check fluid level in brake fluid reservoir tank. If the level is low, add brake fluid.
2. Clear the stored self-diagnostic results and check self-diagnostic results.
Is the above displayed in the self-diagnosis display item?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK CONNECTOR
1. Disconnect brake fluid level switch connector and ABS actuator and electric unit (control unit) connector
and check terminal for deformation, disconnection, l ooseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Securely reconnect connectors and perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3.CHECK HARNESS BETWEEN BRAKE FLUID LEVE L SWITCH AND ABS ACTUATOR AND ELECTRIC
UNIT (CONTROL UNIT)
Self-diagnostic results
ST ANG SEN SIGNAL
Self-diagnostic results
BR FLUID LEVEL LOW
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TROUBLE DIAGNOSIS FOR SYSTEMBRC-47
< SERVICE INFORMATION > [VDC/TCS/ABS]
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1. Turn ignition switch OFF and disconnect brake fluid level switch connector E52 and ABS actuator and electric unit (control unit)
connector E56.
2. Check continuity between brake fluid level switch harness con- nector and ABS actuator and electric unit (control unit) harness
connector.
OK or NG
OK >> Connect connectors and perform an ABS actuator and electric unit (control unit) self-diagnosis.
NG >> If open or short in harness, repair or replace applied harness.
DTC C1156 ST ANG SEN COM CIRINFOID:0000000001569719
Refer to BRC-48, "DTC U1000 CAN COMM CIRCUIT".
DTC C1160 DECEL G SEN SETINFOID:0000000001327689
INSPECTION PROCEDURE
1.CHECK SELF- DIAGNOSTIC RESULTS (1)
Check self-diagnostic results.
Does anything besides
“DECEL G SEN SET” appear on self-diagnostic results display?
YES >> Inspect and repair the indicated it ems. 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-diagnosti c results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.
Does anything appear on self-diagnostic results display?
YES >> Replace yaw rate/side/decel G sensor. Then perform calibration of decel G sensor and perform
self-diagnosis again.
NO >> INSPECTION END
DTC C1164 CV 1INFOID:0000000001569724
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
DTC C1165 CV 2INFOID:0000000001569725
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
DTC C1166 SV 1INFOID:0000000001569726
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
DTC C1167 SV 2INFOID:0000000001569727
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
ABS actuator and electric unit
(control unit) Brake fluid level switch Continuity
81Yes
8GroundNo
Ground 2 Yes
SFIA1193E
Self-diagnostic results DECEL G SEN SET
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TROUBLE DIAGNOSIS FOR SYMPTOMSBRC-49
< SERVICE INFORMATION > [VDC/TCS/ABS]
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TROUBLE DIAGNOSIS FOR SYMPTOMS
Excessive ABS Function Operation FrequencyINFOID:0000000001327692
1.CHECK FRONT AND REAR AXLE
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.CHECK WHEEL SENSOR
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 >> Replace sensor or sensor rotor.
3.CHECK ABS WARNING LAMP DISPLAY
Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-26, "
Self-Diagnosis".
Unexpected Pedal ReactionINFOID:0000000001327693
1.CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is the stroke too long?
YES >>  Bleed air from brake piping.  Check brake pedal, brake booster, and master cylinder mount for play, looseness, and brakesystem for fluid leaks, etc. If any malfunctions are found, make repair.
NO >> GO TO 2.
2.CHECK FUNCTION
Disconnect ABS actuator and electric unit (control unit) c onnector E56 and make sure that braking force is suf-
ficient when ABS in not operating. After the inspection, reconnect connector.
OK or NG
OK >> CHECK WHEEL SENSOR. Refer to BRC-49, "Excessive ABS Function Operation Frequency".
NG >> Check brake system.
The Braking Distance Is LongINFOID:0000000001327694
CAUTION:
On slippery road surfaces, the st opping distance might be longer wi th the ABS operating than when
the ABS is not operating.
1.CHECK FUNCTION
Disconnect ABS actuator and electric unit (control unit) connector E56 to deactivate ABS. In this condition,
check stopping distance. After inspection, connect connector.
OK or NG
OK >>  Bleed air from brake piping.  Check brake system.
NG >> CHECK WHEEL SENSOR. Refer to BRC-49, "
Excessive ABS Function Operation Frequency".
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BRC-50
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
The ABS Function Does Not Operate
INFOID:0000000001327695
CAUTION:
The ABS does not operate when the sp eed is 10 km/h (6 MPH) or less.
1.CHECK ABS WARNING LAMP DISPLAY
Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG
OK >> CHECK WHEEL SENSOR. Refer to BRC-49, "Excessive ABS Function Operation Frequency".
NG >> Perform self-diagnosis. Refer to BRC-26, "
Self-Diagnosis".
Pedal Vibration or ABS Operation Sound OccursINFOID:0000000001327696
CAUTION:
Under the following conditions, when brake pedal is lightly depressed (just place a foot on it), ABS is
activated and vibration is felt. However, this is normal.
 When shifting gears
 When driving on slippery road
 During cornering at high speed
 When passing over bumps or grooves
 When pulling away just after st arting engine [at approximately 10 km/h (6 MPH) or higher]
1.SYMPTOM CHECK 1
Check if pedal vibration or operati on sound occurs when engine is started.
OK or NG
OK >> Perform self-diagnosis. Refer to BRC-26, "Self-Diagnosis".
NG >> GO TO 2.
2.SYMPTOM CHECK 2
Check symptom when electrical component (headlamps, etc.) switches are operated.
Does the symptom occur when the electrical component (head lamp, etc.) switches are operated?
YES >> Check if there is a radio, antenna, antenna lead wi re, or wiring close to ABS actuator and electric
unit (control unit) (or its wiring), and if there is, move it farther away.
NO >> CHECK WHEEL SENSOR. Refer to BRC-49, "
Excessive ABS Function Operation Frequency".
Vehicle Jerks During VDC/TCS/ABS ControlINFOID:0000000001327697
1.CHECK ENGINE SPEED SIGNAL
Perform CONSULT-III “DATA MONITOR” to check engine speed.
Is engine speed at idle 400 rpm or higher?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ABS WARNING LAMP DISPLAY
Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG
OK >> System is normal.
NG >> GO TO 3.
3.CHECK ECM SELF-DIAGNOSTIC RESULTS
Perform ECM self-diagnosis.
Are self-diagnosis items displayed?
YES >> Check the corresponding items. Refer to EC-89(VQ35DE), EC-666(VK45DE) in “Engine Control
(EC section)”.
NO >> GO TO 4.
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BRC-52
< SERVICE INFORMATION >[VDC/TCS/ABS]
WHEEL SENSORS
WHEEL SENSORS
Removal and InstallationINFOID:0000000001327698
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 followin
g when installing sensor.
 As much as possible, avoid rotati ng sensor when removing it. Pull sensors out without pulling on
sensor harness.
 Take care to avoid damaging sensor edges or roto r teeth. Remove wheel sensor first before remov-
ing front wheel hub and bearing assembly and rear fina l drive. This is to avoid damage to sensor wir-
ing and loss of sensor function.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful of the follow ing when installing sensor. Tighten in stallation bolts to specified torques.
 When installing, make sure there is no foreign material such as iron chips on pick-up and mounting
hole of sensor. Make sure no foreign material h as been caught in the sensor rotor. Remove any for-
eign 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 pa nel). When installed, harness must
not be twisted. White line on ha rness must be visible from front.
 When installing rear sensor, attach harness at rear suspension member securely. Besides, harness
must not be twisted when installed.
PFIA0600E
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SENSOR ROTORBRC-53
< SERVICE INFORMATION > [VDC/TCS/ABS]
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SENSOR ROTOR
Removal and InstallationINFOID:0000000001327699
REMOVAL
Front
Sensor rotor cannot be disassembled. To replace sensor rotor, replace wheel hub and bearing assembly.
Refer to FAX-4, "
Removal and Installation"(2WD models), FAX-11, "Removal and Installation"(AWD models).
Rear
 Follow procedure below to remove rear sensor rotor.
- Remove side flange. Refer to RFD-14, "
Removal and Installation".
- 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 FAX-4, "
Removal and Installation"(2WD models), FAX-11, "Removal and Installation"(AWD models).
Rear
 Follow procedure below to install rear sensor rotor.
- Using a drifts, press rear sensor rotor onto side flange.
- Install side flange. Refer to RFD-14, "
Removal and Installation".
Tool number A: ST30720000 (J-25405)
B: ST27863000 ( — )
C: KV40104710 ( — )
SFIA3387E
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BRC-54
< SERVICE INFORMATION >[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and InstallationINFOID:0000000001327700
REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes
from ABS actuator and electric unit (control unit).
3. Remove LH side fender protector. Refer to EI-24
.
4. Remove ABS actuator and electric unit (control unit) mounting nuts.
5. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following wh en removing ABS actuator and electric unit (control unit).
 If the part number on the part number label (p asted on actuator upper surface) is the same, ABS
actuator and electric unit (c ontrol unit) can not be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp
may turn ON or VDC/TCS/ABS may not operate normally.
When replacing ABS actuator an d electric unit (control unit), must use new service parts.
 Before servicing, disconnect battery cables.
 To remove brake tube, use a flare nut torque wrench to prevent flare nuts and brake tube from being
damaged. To install, use a flare nut torque wren ch (commercial service tool) and tighten to the spec-
ified torque.
 Do not apply excessive impact to actuator, such as dropping it.
 Do not remove and install ABS actuator and el ectric unit (control unit) by holding harness.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful of the following wh en installing ABS actuator and electric unit (control unit).
 Tighten the mounting bolts and nuts to the specified torque.
 After the work, bleed air from brake piping. Refer to BR-8, "
Bleeding Brake System".
 After installing vehicle harness connector in th e actuator, make sure connector is securely locked.
 When replacing ABS actuator and el ectric unit (control unit), calibrate steering angle sensor neutral
position and decel G sensor. Refer to BRC-8
.
PFIA0601E
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G SENSORBRC-55
< SERVICE INFORMATION > [VDC/TCS/ABS]
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G SENSOR
Removal and InstallationINFOID:0000000001327701
REMOVAL
1. Remove center console. Refer to IP-11, "Removal and Installa-
tion".
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 endurance
to impact.
 Do not use power tool etc., because G sensor is weak for the impact.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Do not drop or strike G sensor, becau se it has little endurance to impact.
 After performing above works, calibrate decel G sensor (AWD models). Refer to BRC-8, "
Calibration
of Decel G Sensor (AWD Models)".
PFIA0602E
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