sensor INFINITI FX35 2004 Service Manual

BRC-2Revision: 2004 November 2004 FX35/FX45Frequency ............................................................... 53
Symptom 2: Unexpected Pedal Reaction ............... 54
Symptom 3: The Braking Distance Is Long ............ 54
Symptom 4: The ABS Function Does Not Operate ... 54
Symptom 5: Pedal Vibration or ABS Operation
Sound Occurs ......................................................... 55
Symptom 6: Vehicle Jerks During VDC/TCS/ABS
Control .................................................................... 55
WHEEL SENSORS ................................................... 57
Removal and Installation ........................................ 57
REMOVAL ........................................................... 57
INSTALLATION .................................................... 57
SENSOR ROTOR ...................................................... 59
Removal and Installation ........................................ 59
REMOVAL ........................................................... 59
INSTALLATION .................................................... 59ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ... 60
Removal and Installation ......................................... 60
REMOVAL ............................................................ 60
INSTALLATION .................................................... 60
G SENSOR ................................................................ 62
Removal and Installation ......................................... 62
REMOVAL ............................................................ 62
INSTALLATION .................................................... 62
STEERING ANGLE SENSOR ................................... 63
Removal and Installation ......................................... 63
REMOVAL ............................................................ 63
INSTALLATION .................................................... 63

BRC-4
[VDC/TCS/ABS]
PRECAUTIONS
Revision: 2004 November 2004 FX35/FX45

If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

If the following components are replaced with non-genuine components or converted, VDC OFF indicator
lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (Shock Absorber, Strut, Spring, Bush, etc.), Tires, wheels (exclude specified size),
components related to brake (Pad, Rotor, Caliper, etc.), components related to engine (Muffler, ECM,
etc.), components related to body reinforcement (Roll bar, Tower bar, etc.).

Driving in the condition of breakage or excessive wear of suspension, tires or components related to the
brakes may cause VDC OFF indicator lamp and SLIP indicator lamp turn on, and the VDC system may
not operate properly.

When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.

When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp carves on a freeway), the VDC may not operate normally, or VDC OFF indicator lamp and SLIP
indicator lamp may turn on. However, this is not a malfunction, if normal operation can be resumed after
restarting engine.

Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC SW
ON) may cause the G -sensor system indicate a malfunction. However, this is not a malfunction, if normal
operation can be resumed after restarting engine.

PREPARATION
BRC-5
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
PREPARATIONPFP:00002
Special Service ToolsAFS001S7
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsAFS001S8
Tool number
(Kent-Moore No.)
Tool nameDescription
ST30720000
(J 25405)
Drift
a: 77 mm (0.03 in) dia.
b: 55 mm (2.17 in) dia.
Installing rear sensor rotor ST27863000
(—)
Drift
a: 75 mm (2.95 in) dia.
b: 62 mm (2.44 in) dia.
KV40104710
(—)
Drift
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697 in) dia.
ZZA0701D
ZZA0832D
ZZA0832D
Tool name Description
1: Flare nut crowfoot
a: 10 mm (0.39 in)
: 12 mm (0.47 in)
2: Torque wrenchRemoving and installing each brake piping
S-NT360

BRC-6
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
Revision: 2004 November 2004 FX35/FX45
ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionAFS001S9
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
×: Required
–: Not required
CAUTION:
To adjust neutral position of steering angle sensor, make sure to use CONSULT-II.
(Adjustment cannot be done without CONSULT-II.)
1. Stop vehicle with front wheels in straight-ahead position.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector on vehicle, and turn ignition
switch ON (do not start engine).
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
3. Touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENSOR ADJUSTMENT” on CONSULT-II screen in
this order. Refer to BRC-26, "
CONSULT-II BASIC OPERATION PROCEDURE" .
4. Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to carry out above operation.
7. Run vehicle with front wheels in straight-ahead position, then
stop.
8. Select “DATA MONITOR”, “SELECTION FROM MENU”, and “STR ANGLE SIG” on CONSULT-II screen.
Then make sure “STR ANGLE SIG” is within 0 ±3.5 deg. If value is more than specification, repeat steps 3
to 7.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
10. Turn ignition switch OFF.
Calibration of Decel G-sensor (AWD Model)AFS001TQ
NOTE:
After removing/installing or replacing yaw rate/side/decel G-sensor, ABS actuator and electric unit (control
unit), suspension components, or after adjusting wheel alignment make sure to calibrate of decel G-sensor
before running vehicle.
CAUTION:
To calibrate decel G-sensor, make sure to use CONSULT-II. (Adjustment cannot be done without CON-
SULT-II.)
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing ABS actuator and electric unit (control unit)−
Replacing ABS actuator and electric unit (control unit)×
Removing/Installing steering angle sensor×
Removing/Installing steering components×
Removing/Installing suspension components×
Change 4 tires to new ones –
Tire rotation–
Adjusting wheel alignment×
SFIA0371E

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2004 November 2004 FX35/FX45
SYSTEM DESCRIPTIONPFP:00000
System DiagramAFS001SB
VDC FunctionAFS001SC

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under steer-
ing / over steering) is determined from information from G-sensor, wheel sensor, etc., and this information
is used to improve vehicle stability by controlling the braking and engine power to all four wheels.

SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, body and brake pedal lightly vibrate and mechanical noises may be heard. This is
normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when vehicle is sub-
ject to strong shaking or large vibration, such as when vehicle is on a turn table, a ship or a steep slope
such as bank while engine is running. In this case, restart engine on a normal road, and if ABS warning
lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no problem.
TCS FunctionAFS001SD

The wheel spin of the drive wheels is detected by ABS actuator and electric unit (control unit) from the
wheel speed signals from four wheels, so if wheel spin occurs, drive wheel right and left brake fluid pres-
sure control and engine fuel cut are performed while throttle value is restricted to reduce the engine
torque and decrease the amount of wheel spin. In addition, the degree throttle is opened is controlled to
achieve the optimum engine torque.

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

TCS may be activated any time vehicle suddenly accelerates, suddenly down/upshifts, or is driven on a
road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
ABS FunctionAFS001SE

The anti-lock brake system is a function that detects wheel revolution while braking, and it improves han-
dling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.

If the electrical system breaks down, then the fail-safe function starts, the ABS becomes inoperative, and
ABS warning lamp turns on.

Electrical system diagnosis by CONSULT-II is available.

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
SFIA1160E

TROUBLE DIAGNOSIS
BRC-23
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
Control Unit Input/Output Signal StandardAFS001SP
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows ABS actuator and electric unit (control unit) calculation data, so a normal value
might be displayed even in the event the output circuit (harness) is open or short-circuited.
Monitor item Display contentData monitor
Note: Error inspection
checklist
ConditionReference value in
normal operation
SLCT LVR POSI A/T shift positionP: P position
R: R position
N: N position
D: D position
—
GEAR A/T gear position1: 1st gear
2: 2nd gear
3: 3rd gear
4: 4th gear
5: 5th gear
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORWheel speedVehicle stopped 0 [km/h (MPH)]
BRC-37, "
Inspection 1:
Wheel Sensor System"Vehicle running (Note 1)Almost in accor-
dance with speed-
ometer display
(within ±10 %)
ACCEL POS SIG Open/close condition
of throttle valve (linked
with accelerator pedal).Accelerator pedal not
depressed (ignition switch is
ON)0 %
Communication circuit
between VDC/TCS/ABS
control unit and ECM
Depress accelerator pedal
(ignition switch is ON)0 to 100 %
ENGINE SPEED With engine runningWith engine stopped 0 rpm
EC section
Engine runningAlmost in accor-
dance with
tachometer display
STR ANGLE SIGSteering angle
detected by steering
angle sensorStraight-ahead Approx. 0 degBRC-42, "
Inspection 5:
Steering Angle Sensor
System"Steering wheel turned –756 to 756 deg
YAW RATE SENYaw rate detected by
yaw rate sensorVehicle stopped Approx. 0 d/sBRC-44, "
Inspection 6:
Yaw Rate/Side G-Sen-
sor (2WD model), Yaw
Rate/Side/Decel G-sen-
sor (AWD models) Sys-
tem"
Vehicle running –100 to 100 d/s
SIDE G-SENSORTransverse G detected
by side G-sensorVehicle stopped
Approx. 0 m/s
2BRC-44, "Inspection 6:
Yaw Rate/Side G-Sen-
sor (2WD model), Yaw
Rate/Side/Decel G-sen-
sor (AWD models) Sys-
tem"
Vehicle running
–16.7 to 16.7 m/s2
PRESS SENSORBrake fluid pressure
detected by pressure
sensorWith ignition switch turned ON
and brake pedal releasedApprox. 0 bar
BRC-40, "
Inspection 4:
Pressure Sensor Sys-
tem"With ignition switch turned ON
and brake pedal depressed0 to 170 bar
BATTERY VOLTBattery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit)Ignition switch ON 10 to 16 VBRC-48, "
Inspection 9:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground System"
STOP LAMP SW Brake pedal operationBrake pedal depressed ONBRC-50, "
Inspection 10:
Stop Lamp Switch Sys-
tem"Brake pedal not depressed OFF

BRC-24
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
OFF SWVDC OFF switch
ON/OFF status VDC OFF switch ON
(When VDC OFF indicator
lamp is ON)ON
BRC-53, "VDC OFF
SWITCH"VDC OFF switch OFF
(When VDC OFF indicator
lamp is OFF)OFF
ABS WARN LAMPABS warning lamp ON
condition (Note 2)ABS warning lamp ON ONBRC-37, "
BASIC
INSPECTION 3: ABS
WARNING LAMP, VDC
OFF INDICATOR LAMP,
SLIP INDICATOR LAMP
and BRAKE WARNING
LAMP INSPECTION"
ABS warning lamp OFF OFF
MOTOR RELAYOperation status of
motor and motor relayIgnition switch ON or engine
running (ABS not operated)OFF
BRC-47, "
Inspection 8:
Actuator Motor System"Ignition switch ON or engine
running (ABS operated)ON
ACTUATOR RLYActuator relay opera-
tion statusActuator (solenoid) is active
(“ACTIVE TEST” with CON-
SULT-II)ON
BRC-47, "
Inspection 8:
Actuator Motor System"When actuator relay is inactive
(in fail-safe mode)OFF
OFF LAMPVDC OFF indicator
lamp status (Note 3) When VDC OFF indicator
lamp is ONON
BRC-37, "
BASIC
INSPECTION 3: ABS
WARNING LAMP, VDC
OFF INDICATOR LAMP,
SLIP INDICATOR LAMP
and BRAKE WARNING
LAMP INSPECTION"
When VDC OFF indicator
lamp is OFFOFF
SLIP LAMPSLIP indicator lamp
status (Note 4)When SLIP indicator lamp is
ONON
When SLIP indicator lamp is
OFFOFF
FR LH IN SOL
FR LH OUT SOL
FR RH IN SOL
FR RH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOLSolenoid valve opera-
tionActuator (solenoid) is active
(“ACTIVE TEST” with CON-
SULT-II) and actuator relay is
active (ignition switch ON)ON
BRC-46, "
Inspection 7:
Solenoid and VDC
Change-Over Valve Sys-
tem"
When actuator (solenoid) is
not active or actuator relay is
inactive (in fail-safe mode)OFF
CV1
CV2
SV1
SV2VDC/TCS switch-over
valve statusWhen actuator (switch-over
valve) is active (“ACTIVE
TEST” with CONSULT-II) and
actuator relay is active (ignition
switch ON)ON
When actuator (switch-over
valve) is not active or actuator
relay is inactive (in fail-safe
mode)OFF
DECEL G-SEN
(AWD model)Longitudinal accelera-
tion detected by Decel
G-Sensor [Note 5]Vehicle stopped approx. 0 GBRC-44, "
Inspection 6:
Yaw Rate/Side G-Sen-
sor (2WD model), Yaw
Rate/Side/Decel G-sen-
sor (AWD models) Sys-
tem"
Vehicle running -1.7 to +1.7 G Monitor item Display contentData monitor
Note: Error inspection
checklist
ConditionReference value in
normal operation

BRC-26
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
CONSULT-II BASIC OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “ABS” in the “SELECT SYSTEM” screen.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
Diagnostic
test modeFunction Reference
WORK SUP-
PORTThis mode enables a technician to adjust some devices faster and more accurately
by following the indications on CONSULT-II.BRC-6, "
Adjustment of Steer-
ing Angle Sensor Neutral
Position"
SELF-DIAG-
NOSTIC
RESULTSSelf-diagnostic results can be read and erased quickly.BRC-27, "
SELF-DIAGNOSIS"
DATA MONI-
TORInput/Output data in the ABS actuator and electric unit (control unit) can be read.BRC-30, "DATA MONITOR"
CAN DIAG
SUPPORT
MNTRThe results of transmit/receive diagnosis of communication can be read. —
ACTIVE TESTDiagnostic Test Mode in which CONSULT-II drives some actuators apart from the
ABS actuator and electric unit (control unit) and also shifts some parameters in a
specified range.BRC-33, "
ACTIVE TEST"
FUNCTION
TESTConducted by CONSULT-II instead of a technician to determine whether each sys-
tem is “OK” or “NG”.—
ECU PART
NUMBERABS actuator and electric unit (control unit) part number can be read. —
SKIA3098E
PKIA2102E

TROUBLE DIAGNOSIS
BRC-27
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2004 November 2004 FX35/FX45
6. Select the required diagnostic location from the “SELECT DIAG
MODE” screen.
For further information, see CONSULT-II Operation Manual.
SELF-DIAGNOSIS
Description

If an error is detected in the system, ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp
on the combination meter turn on. In this case, perform self-diagnosis as follows:

While CONSULT-II is used, ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp may be
turned on in a case of no malfunctioning.
Operation Procedure
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
3. Turn ignition switch ON.
4. Start engine and drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping vehicle, with the engine running, touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-
DIAG RESULTS” in order on the CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on the
ignition switch, “ABS” might not be displayed in the System Selection screen. In this case, repeat
the operation from step 1. If it cannot be shown after several attempts, ABS actuator and electric
unit (control unit) may have malfunctioned.
6. The self-diagnostic results are displayed. (If necessary, the self-diagnostic results can be printed out by
touching “PRINT”.)

When “NO FAILURE” is displayed, check ABS warning lamp, VDC OFF indicator lamp and SLIP indica-
tor lamp.
7. Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component.
8. Drive the vehicle at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:

In a case that a wheel sensor is malfunctioning, ABS warning lamp, VDC OFF indicator lamp,
SLIP indicator lamp will turn on. If vehicle is not driven at approximately 30 km/h (19 MPH) or
more for at least approximately 1 minute after repair of the wheel sensor system, ABS warning
lamp, VDC OFF indicator lamp and SLIP indicator lamp may not turn off even if everything is
normal. Check again to make sure that there is no malfunction on other parts.
9. Turn ignition switch OFF to prepare for erasing the memory.
10. Start engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE
MEMORY” in order on the CONSULT-II screen to erase the error memory.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the error memory is not erased, re-perform the operation from step 5.
11. For the final inspection, drive at approximately 30 km/h (19 MPH) or more for approximately 1 minute and
confirm that ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp are OFF.
SFIA2436E

BRC-28
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Display Item List
Self-diagnostic item Malfunction detecting condition Check system
FR LH SENSOR- 1
[C1104]Circuit of front LH wheel sensor is open, shorted or sensor power
voltage is unusual.
BRC-37, "
Inspection 1:
Wheel Sensor System"
(Note 1) RR RH SENSOR- 1
[C1101]Circuit of rear RH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR RH SENSOR- 1
[C1103]Circuit of front RH wheel sensor is open, shorted or sensor power
voltage is unusual.
RR LH SENSOR- 1
[C1102]Circuit of rear LH wheel sensor is open, shorted or sensor power
voltage is unusual.
FR LH SENSOR- 2
[C1108]ABS actuator and electric unit (control unit) cannot identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
RR RH SENSOR- 2
[C1105]ABS actuator and electric unit (control unit) cannot identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
FR RH SENSOR- 2
[C1107]ABS actuator and electric unit (control unit) cannot identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
RR LH SENSOR- 2
[C1106]ABS actuator and electric unit (control unit) cannot identify sen-
sor pulses, because of large gap between wheel sensor and sen-
sor rotor.
STOP LAMP SW
[C1116]Stop lamp switch circuit is open or shorted.BRC-50, "
Inspection 10:
Stop Lamp Switch Sys-
tem"
PRESS SEN CIRCUIT
[C1142]Pressure sensor signal line is open or shorted, or sensor power
voltage is unusual, or pressure sensor is malfunctioning.BRC-40, "Inspection 4:
Pressure Sensor Sys-
tem"
ST ANG SEN CIRCUIT
[C1143]Neutral position of steering angle sensor is dislocated, or steer-
ing angle sensor is malfunctioning.BRC-42, "Inspection 5:
Steering Angle Sensor
System"
YAW RATE SENSOR
[C1145]Yaw rate sensor has generated an error, or yaw rate sensor sig-
nal line is open or shorted.BRC-44, "
Inspection 6:
Yaw Rate/Side G-Sensor
(2WD model), Yaw Rate/
Side/Decel G-sensor
(AWD models) System"