brake sensor INFINITI M35 2006 Factory Manual PDF

REAR DISC BRAKE
BR-29
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BR
Revision: 2006 January2006 M35/M45
REAR DISC BRAKEPFP:44000
On-Board InspectionNFS000PG
PAD WEAR INSPECTION
Check pad thickness from an inspection hole on cylinder body.
Check using a scale if necessary.
ComponentsNFS000PH
Standard
Standard thickness : 8.5 mm (0.335 in)
Repair limit thickness : 2.0 mm (0.079 in)
BRA0010D
1. Union bolt 2. Brake hose 3. Copper washer
4. Cap 5. Bleed valve 6. Sliding pin bolt
7. Cylinder body 8. Piston seal 9. Piston
10. Piston boot 11. Retaining ring 12. Inner shim cover
13. Inner shim 14. Inner pad 15. Pad retainer
16. Outer pad 17. Outer shim 18. Sliding pin boot
19. Bushing 20. Torque member mounting bolt 21. Washer
22. Torque member 23. Pad wear sensor 24. Inner pad (RH)
Refer to GI-11, "
Components" and the followings for the symbols in the figure.
1: Apply rubber grease.
2: Apply PBC (Poly Butyl Cuprysil) grease or silicone-based grease.
PFIA0705J

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
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SECTION BRC
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BRC
Revision: 2006 January2006 M35/M45
BRAKE CONTROL SYSTEM
VDC/TCS/ABS
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Procedures without Cowl Top Cover ..... 3
Precautions for Brake System .................................. 3
Precautions for Brake Control .................................. 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 5
ON-VEHICLE SERVICE ............................................. 6
Adjustment of Steering Angle Sensor Neutral Posi-
tion ........................................................................... 6
SYSTEM DESCRIPTION ............................................ 7
System Diagram ....................................................... 7
Function ................................................................... 7
ABS ....................................................................... 7
EBD ....................................................................... 7
TCS ....................................................................... 7
VDC ....................................................................... 8
ECD ....................................................................... 8
Operation That Is Not "System Error" ...................... 8
ABS ....................................................................... 8
TCS ....................................................................... 8
VDC ....................................................................... 8
Fail-Safe Function .................................................... 8
ABS, EBD SYSTEM .............................................. 8
VDC / TCS ............................................................ 9
Hydraulic Circuit Diagram ........................................ 9
CAN COMMUNICATION .......................................... 10
System Description ................................................ 10
TROUBLE DIAGNOSIS .............................................11
How to Perform Trouble Diagnoses ........................ 11
BASIC CONCEPT ................................................ 11
DIAGNOSIS FLOW CHART ............................... 12
ASKING COMPLAINTS ...................................... 13
EXAMPLE OF DIAGNOSIS WORKSHEET ........ 13
Component Parts Location ..................................... 14
Schematic .............................................................. 15Wiring Diagram — VDC — ..................................... 16
CONSULT-II Functions (ABS) ................................ 22
CONSULT-II MAIN FUNCTION ........................... 22
CONSULT-II BASIC OPERATION PROCEDURE
... 22
Self-Diagnosis .....................................................
... 23
OPERATION PROCEDURE ................................ 23
ERASE MEMORY ............................................... 23
DISPLAY ITEM LIST ........................................... 24
Data Monitor ........................................................... 27
OPERATION PROCEDURE ................................ 27
DISPLAY ITEM LIST ........................................... 27
Active Test .............................................................. 30
OPERATION PROCEDURE ................................ 30
TEST ITEMS ....................................................... 31
For Fast and Accurate Diagnosis ........................... 32
PRECAUTIONS FOR DIAGNOSIS ..................... 32
Basic Inspection ..................................................... 33
BASIC INSPECTION 1: BRAKE FLUID LEVEL,
LEAK INSPECTION AND BRAKE PAD .............. 33
BASIC INSPECTION 2: LOOSENESS OF
POWER SYSTEM TERMINALS AND BATTERY ... 33
BASIC INSPECTION 3: ABS WARNING LAMP,
BRAKE WARNING LAMP, VDC OFF INDICATOR
LAMP AND SLIP INDICATOR LAMP .................. 33
Inspection 1: Wheel Sensor Circuit ........................ 34
Inspection 2: Engine System .................................. 36
Inspection 3: ABS Actuator and Electric Unit (Con-
trol Unit) .................................................................. 36
Inspection 4: ABS Actuator and Electric Unit (Con-
trol Unit) Power Supply and Ground Circuit ............ 37
Inspection 5: ABS Motor and Motor Relay Circuit ... 38
Inspection 6: Solenoid, VDC Change-Over Valve
and Actuator Relay Circuit ...................................... 40
Inspection 7: Pressure Sensor Circuit .................... 41
Inspection 8: Steering Angle Sensor Circuit ........... 41
Inspection 9: Park/Neutral Position (PNP) Switch
Circuit ..................................................................... 43
Inspection 10: Stop Lamp Switch Circuit ................ 44
Inspection 11: Yaw Rate/Side G Sensor Circuit ..... 45

BRC-2Revision: 2006 January2006 M35/M45 Inspection 12: Brake Fluid Level Switch Circuit ...... 48
Inspection 13: RAS Control Unit Circuit (With RAS) ... 49
Inspection 14: ICC Sensor Integrated Unit Circuit
(With ICC) ............................................................... 50
Inspection 15: AWD Control Unit Circuit (AWD
Model) ..................................................................... 50
Inspection 16: CAN Communication Circuit ............ 51
Inspection 17: VDC OFF Switch Circuit .................. 51
Inspection 18: Parking Brake Switch Circuit ........... 52
Inspection 19: Warning Lamp and Indicator Lamp
Circuit ..................................................................... 53
Symptom 1 Excessive ABS Function Operation Fre-
quency .................................................................... 53
Symptom 2 Unexpected Pedal Reaction ................ 54
Symptom 3 The Braking Distance Is Long ............. 55
Symptom 4 ABS Function Does Not Operate ........ 55
Symptom 5 Pedal Vibration or ABS Operation
Sound Occurs ......................................................... 55
Symptom 6 Vehicle Jerks During VDC/TCS/ABS
Control .................................................................... 56WHEEL SENSOR ................................................... ... 57
Removal and Installation ......................................... 57
COMPONENT ...................................................... 57
REMOVAL ............................................................ 57
INSTALLATION .................................................... 57
SENSOR ROTOR ...................................................
... 59
Removal and Installation ......................................... 59
REMOVAL ............................................................ 59
INSTALLATION .................................................... 59
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ... 60
Removal and Installation ......................................... 60
COMPONENT ...................................................... 60
REMOVAL ............................................................ 60
INSTALLATION .................................................... 61
G-SENSOR ................................................................ 62
Removal and Installation ......................................... 62
REMOVAL ............................................................ 62
INSTALLATION .................................................... 62
STEERING ANGLE SENSOR ................................... 63
Removal and Installation ......................................... 63
REMOVAL ............................................................ 63
INSTALLATION .................................................... 63

PREPARATION
BRC-5
[VDC/TCS/ABS]
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BRC
Revision: 2006 January2006 M35/M45
PREPARATIONPFP:00002
Special Service ToolsNFS000Q2
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsNFS000Q3
Tool number
(Kent-Moore No.)
Tool nameDescription
ST30720000
(J-25405)
Drift
a: 77 mm (3.03 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
(—)
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697 in) dia.
ZZA0701D
ZZA0832D
ZZA0832D
To o l n a m eDescription
1. Flare nut crowfoot
a: 10 mm (0.39 in) /12mm (0.47 in)
2. Torque wrenchInstalling brake tube
S-NT360

SYSTEM DESCRIPTION
BRC-7
[VDC/TCS/ABS]
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BRC
Revision: 2006 January2006 M35/M45
SYSTEM DESCRIPTIONPFP:00000
System DiagramNFS000Q5
FunctionNFS000Q6
ABS
Anti-Lock Brake System is a function that detects wheel revolution while braking, electronically controls
braking force, and prevents wheel locking during sudden braking. It improves handling stability and
maneuverability for avoiding obstacles.
Electrical system diagnosis by CONSULT-II is available.
EBD
Electronic Brake force Distribution is a following function. ABS actuator and electric unit (control unit)
detects subtle slippages between the front and rear wheels during braking. Then it electronically controls
the rear braking force (brake fluid pressure) to reducing and reduces rear wheel slippage. Accordingly it
improves vehicle stability.
Electrical system diagnosis by CONSULT-II is available.
TCS
Traction Control System is a function that electronically controls engine torque, brake fluid pressure and
A/T gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals
1. Electric line 2. Brake hydraulic line 3. ECM
4. TCM 5. Steering angle sensor 6. Warning lamp, indicator lamp
(combination meter)
7. AWD control unit
(AWD model)8. ICC sensor integrated unit
(with ICC)9. RAS control unit
(with RAS)
10. Injector operation signal 11. CAN communication 12. Front RH wheel sensor
13. Front LH wheel sensor 14. Master cylinder 15. ABS actuator and electric unit (con-
trol unit)
16. VDC OFF switch 17. Yaw rate/side G sensor 18. Rear RH wheel sensor
19. Rear LH wheel sensor
SFIA2722J

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2006 January2006 M35/M45
from 4 wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels
(rear wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid
pressure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine
torque by the control unit. Further more, throttle position is continuously controlled to ensure the optimum
engine torque at all times.
During TCS operation, it informs driver of system operation by flashing SLIP indicator lamp.
Electrical system diagnosis by CONSULT-II is available.
VDC
Vehicle Dynamics Control system detects driver's steering operation amount and brake pedal travel from
steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel
sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle driving
stability by controlling brake application to 4 wheels and engine output.
During VDC operation, it informs driver of system operation by flashing SLIP indicator lamp.
Electrical system diagnosis by CONSULT-II is available.
ECD
Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls brake
fluid pressure with the motor (built-in ABS actuator and electric unit (control unit)).
Operation That Is Not "System Error" NFS000Q7
ABS
When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating sound
may be heard from engine room. This is a normal states of the operation check.
During ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
TCS
Depending on road circumstances, driver may have a sluggish feel. This is normal, because optimum
traction has highest priority under TCS operation.
When vehicle is passing through a road where surface friction varies, downshifting or depressing acceler-
ator pedal fully may activate TCS temporarily.
VDC
During VDC operation, body and brake pedal lightly vibrate and mechanical sounds may be heard. This is
normal.
If vehicle is rotated on turn table, or rolled and rocked on ship, ABS warning lamp, VDC OFF indicator
lamp, and SLIP indicator lamp may turn on. In this case, start engine on normal road again. If ABS warn-
ing lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off after restart, it is normal.
When starting TCS or VDC under rapid acceleration or hard turn, operating sound by brake pedal is gen-
erated. However, this is not malfunction. This is because TCS and VDC are functioning normally.
VDC may not operate normally or ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp
may turn on when driving special roads with extremely steep slant (banks on circuit road and so on.) How-
ever, it is not malfunction when returning to a normal state after restarting the engine. In that case, be sure
to erase the memory of self-diagnosis. Refer to BRC-23, "
ERASE MEMORY" .
Yaw rate /side G sensor malfunction may occur under hard turn like spin turn, rapid acceleration turn, drift
run, etc., when VDC function is OFF (VDC OFF switch is turned on). It is not malfunction if it is possible to
return to a normal position after restarting engine. Then erase the memory of self-diagnosis. Refer to
BRC-23, "
ERASE MEMORY" .
VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure
warning lamp turns on. This is not a VDC system error but results from characteristic change of tires.
Fail-Safe FunctionNFS000Q8
ABS, EBD SYSTEM
In the event there is a malfunction with the electrical system, the ABS warning lamp, VDC OFF indicator lamp,
and SLIP indicator lamp will turn on when it is the ABS that is malfunctioning, and the brake warning lamp,
ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp will turn on when it is the EBD that is

TROUBLE DIAGNOSIS
BRC-23
[VDC/TCS/ABS]
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BRC
Revision: 2006 January2006 M35/M45
Self-DiagnosisNFS000QG
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 performs CAN communication.
3. Turn ignition switch ON.
4. Start engine and drive vehicle at 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 “SELECT SYSTEM” screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (Touch “PRINT” to print out self-diagnostic results, if necessary.)
Check ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp if “NO FAILURE” is dis-
played. Refer to BRC-53, "
Inspection 19: Warning Lamp and Indicator Lamp Circuit" .
7. Perform the appropriate inspection from display item list, and repair or replace the malfunctioning compo-
nent.Refer to BRC-24, "
DISPLAY ITEM LIST" .
8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning
lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp will not turn off even
when the system is normal unless the vehicle is driving at approximately 30 km/h (19 MPH) or
more for approximately 1 minute.
ERASE MEMORY
1. Turn ignition switch OFF.
2. Start engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE
MEMORY” in order on the CONSULT-II screen to erase the diagnostic memory.
If “ABS” is not indicated, go to GI-40, "
CONSULT-II Data Link Connector (DLC) Circuit" .
CAUTION:
If the diagnostic memory is not erased, re-perform the operation from step 4.
3. Perform self-diagnosis again, and make sure that diagnostic memory is erased.
4. Drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make
sure that the ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp
turn off.
NOTE:
Brake warning lamp will turn on in case of parking brake operation (when switch is ON) or of brake fluid
level switch operation (when brake fluid is insufficient).
VDC OFF switch should not stay "ON" position.

BRC-26
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure that
ABS warning lamp turns off while driving vehicle at 30 km/h (19 MPH) or more for approximately 1 minute according to self-diagnosis
procedure. In addition, if wheel sensor 2 is displayed for wheels, check wheel sensor circuit and also check control unit power voltage.
Note 2: When malfunctions are detected in several systems, including CAN communication circuit [U1000], troubleshoot CAN communi-
cation circuit. Refer to BRC-51, "
Inspection 16: CAN Communication Circuit" . C1147 USV LINE [FL-RR]VDC switch-over solenoid valve (USV1) on the primary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
BRC-40,
"Inspection 6:
Solenoid, VDC
Change-Over
Valve and Actua-
tor Relay Circuit"
C1148 USV LINE [FR-RL]VDC switch-over solenoid valve (USV2) on the secondary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1149 HSV LINE [FL-RR]VDC switch-over solenoid valve (HSV1) on the primary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1150 HSV LINE [FR-RL]VDC switch-over solenoid valve (HSV2) on the secondary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1153 EMERGENCY BRAKEWhen ABS actuator and electric unit (control unit) is malfunction-
ing. (pressure increase is too much or too little)BRC-36,
"Inspection 3:
ABS Actuator
and Electric Unit
(Control Unit)"
C1154 PNP POS SIGTCM or ABS actuator and electric unit (control unit) internal mal-
function.BRC-43,
"Inspection 9:
Park/Neutral
Position (PNP)
Switch Circuit"
C1155 BR FLUID LEVEL LOWBrake fluid level is low or communication line between the ABS
actuator and electric unit (control unit) and brake fluid level switch
is open or shorted. BRC-48,
"Inspection 12:
Brake Fluid
Level Switch Cir-
cuit"
C1156 ST ANG SEN COM CIRCAN communication circuit or steering angle sensor is malfunc-
tioning.BRC-51, "Inspection 16:
CAN Communi-
cation Circuit"
C1170 VARIANT CODING In a case where VARIANT CODING is different.BRC-36,
"Inspection 3:
ABS Actuator
and Electric Unit
(Control Unit)"
C1185 ACC CONT ICC sensor integrated unit internal malfunction.BRC-50,
"Inspection 14:
ICC Sensor Inte-
grated Unit Cir-
cuit (With ICC)"
U1000 CAN COMM CIRCUIT When there is a malfunction in the CAN communication circuit.BRC-51,
"Inspection 16:
CAN Communi-
cation Circuit"
(Note 2)
U1100 ACC COMM CIRCUITWhen there is a malfunction in the CAN communication circuit or
ICC sensor integrated unit.BRC-51,
"Inspection 16:
CAN Communi-
cation Circuit"
Code Display item Malfunction detecting condition Check item

TROUBLE DIAGNOSIS
BRC-27
[VDC/TCS/ABS]
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BRC
Revision: 2006 January2006 M35/M45
Data MonitorNFS000QH
OPERATION PROCEDURE
1. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on CONSULT-II screen.
CAUTION:
When “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.
2. At the monitor item selection screen, touch one of the items “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”.
3. Touch “START” to proceed to the data monitor screen.
DISPLAY ITEM LIST
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circuited.
E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU
SELECT
MONITOR
ITEM Monitor item Display contentData monitor
ConditionReference value in
normal operation
E, M, SFR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSORWheel speed0 [km/h] Vehicle stopped
Nearly matches the speed
meter display (
10 % or
less)Vehicle running
(Note 1)
E, M, S STOP LAMP SW Brake pedal operationWhen brake pedal is
depressedON
When brake pedal is not
depressedOFF
E, M, S BATTERY VOLTBattery voltage supplied to the ABS
actuator and electric unit (control
unit)Ignition switch ON 10 – 16 V
E, M, S GEAR Gear position determined by TCM1st gear
2nd gear
3rd gear
4th gear
5th gear1
2
3
4
5
E, M, S SLCT LVR POSI A/T shift positionP position
R position
N position
D positionP
R
N
D
E, M, S OFF SW VDC OFF switch ON/OFFVDC OFF switch ON
(When VDC OFF indicator
lamp is ON)ON
VDC OFF switch OFF
(When VDC OFF indicator
lamp is OFF)OFF
E, M, S YAW RATE SENYaw rate detected by yaw rate/side
G sensorWhen vehicle stop Approx. 0 d/s
When vehicle turning (-75 to 75 d/s)
E, M, S4WD MODE MON
(Note 2)AWD activated Engine running AUTO
E, S ACCEL POS SIG Throttle actuator opening/closing is
displayed (linked with accelerator
pedal)Accelerator pedal not
depressed (ignition switch
is ON)0 %
Depress accelerator pedal
(ignition switch is ON)0 - 100 %

BRC-28
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
E, S SIDE G-SENSORTransverse G detected by side G
sensorVehicle stopped
Approx. 0 m/s
2
Vehicle turning rightNegative value
(m/s2 )
Vehicle turning leftPositive value
(m/s
2 )
E, S STR ANGLE SIGSteering angle detected by steering
angle sensorStraight-ahead Approx. 0
Steering wheel turned –720 to 720
E, S PRESS SENSORBrake fluid pressure detected by
pressure sensorWith ignition switch turned
ON and brake pedal
releasedApprox. 0 bar
With ignition switch turned
ON and brake pedal
depressed–40 to 300 bar
E, S ENGINE RPM With engine runningWith engine stopped 0 rpm
Engine runningAlmost in accor-
dance with tachom-
eter display
E, S FLUID LEV SW Brake fluid level switchWhen brake fluid level
switch ONON
When brake fluid level
switch OFF OFF
E, S PARK BRAKE SW Parking brake switchParking brake switch is
activeON
Parking brake switch is
inactiveOFF
M, SFR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOLOperation status of all solenoid
valve Actuator (solenoid valve) is
active (“ACTIVE TEST”
with CONSULT-II) or actua-
tor relay is inactive (in fail-
safe mode)ON
When the actuator (sole-
noid valve) is not active
and actuator relay is active
(ignition switch ON)OFF
M, S MOTOR RELAY Motor and motor relay operationWhen the motor relay and
motor are operatingON
When the motor relay and
motor are not operatingOFF
M, SACTUATOR RLY
(Note 3)Actuator relay operationWhen the actuator relay is
operatingON
When the actuator relay is
not operatingOFF
M, S ABS WARN LAMPABS warning lamp
(Note 4)When ABS warning lamp is
ONON
When ABS warning lamp is
OFFOFF
M, S OFF LAMPVDC OFF indicator lamp
(Note 4)When VDC OFF indicator
lamp is ONON
When VDC OFF indicator
lamp is OFFOFF E: ECU INPUT SIGNALS M: MAIN SIGNALS S: SELECTION FROM MENU
SELECT
MONITOR
ITEM Monitor item Display contentData monitor
ConditionReference value in
normal operation