Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti M45 M35 Y50 2006-2007 Approved M45_M35-Y50-2007 brc
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS Wiring Diagram -- VDC -- .................................... 15 . BRC
Control Unit Input/Output Signal Standard ............ 21 .
PRECAUTIONS ......................................................... 3 . REFERENCE VALUE FROM CONSULT-II ........ 21 .
Precautions for Supplemental Restraint System CONSULT-II Functions (ABS) ............................... 23 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CONSULT-II MAIN FUNCTION .......................... 23 .
SIONER" ................................................................. 3
. CONSULT-II SETTING PROCEDURE ............... 23 .
Precautions for Procedures without Cowl Top Cover 3 ..... Self-Diagnosis ....................................................... 24
.
Precautions for Brake System ................................. 3 . H
OPERATION PROCEDURE ............................... 24 .
Precautions for Brake Control ................................. 4 . ERASE MEMORY .............................................. 24 .
PREPARATION .......................................................... 5 . DISPLAY ITEM LIST .......................................... 25 .
Special Service Tools .............................................. 5 . Data Monitor .......................................................... 28
. I
Commercial Service Tools ....................................... 5 . OPERATION PROCEDURE ............................... 28 .
ON-VEHICLE SERVICE ............................................ 6 . DISPLAY ITEM LIST .......................................... 28 .
Adjustment of Steering Angle Sensor Neutral Posi- Active Test ............................................................. 30
. J
tion .......................................................................... 6
. OPERATION PROCEDURE ............................... 30 .
SYSTEM DESCRIPTION ........................................... 7 . TEST ITEMS ...................................................... 31 .
System Diagram ...................................................... 7 . For Fast and Accurate Diagnosis .......................... 32 .
Functions ................................................................. 7
. K
PRECAUTIONS FOR DIAGNOSIS .................... 32 .
ABS ...................................................................... 7
. Basic Inspection .................................................... 33
.
EBD ...................................................................... 7
. BASIC INSPECTION 1: BRAKE FLUID LEVEL,
TCS ...................................................................... 8
. LEAK INSPECTION AND BRAKE PAD ............. 33 . L
VDC ...................................................................... 8
. BASIC INSPECTION 2: LOOSENESS OF
ECD ...................................................................... 8
. POWER SYSTEM TERMINALS AND BATTERY 33 ...
Operation That Is Not "System Error" ..................... 8 . BASIC INSPECTION 3: ABS WARNING LAMP, M
ABS ...................................................................... 8
. BRAKE WARNING LAMP, VDC OFF INDICATOR
TCS ...................................................................... 8
. LAMP AND SLIP INDICATOR LAMP ................. 33 .
VDC ...................................................................... 8
. TROUBLE DIAGNOSIS FOR SYSTEM ................... 34 .
Hydraulic Circuit Diagram ....................................... 9 . Wheel Sensor Circuit ............................................. 34 .
CAN Communication ............................................... 9 . INSPECTION PROCEDURE ............................. 34 .
SYSTEM DESCRIPTION ..................................... 9 . Engine System ...................................................... 36
.
TROUBLE DIAGNOSIS ........................................... 10 . INSPECTION PROCEDURE ............................. 36 .
Fail-Safe Function ................................................. 10 . ABS Actuator and Electric Unit (Control Unit) ....... 36 .
ABS, EBD SYSTEM ........................................... 10 . INSPECTION PROCEDURE ............................. 36 .
VDC/TCS ........................................................... 10 . ABS Actuator and Electric Unit (Control Unit) Power
How to Perform Trouble Diagnoses ...................... 10 . Supply and Ground Circuit .................................... 37 .
BASIC CONCEPT .............................................. 10 . INSPECTION PROCEDURE ............................. 37 .
DIAGNOSIS FLOW CHART ...............................11 . ABS Motor and Motor Relay Circuit ....................... 38 .
ASKING COMPLAINTS ..................................... 12 . INSPECTION PROCEDURE ............................. 38 .
EXAMPLE OF DIAGNOSIS WORKSHEET ....... 12 . Solenoid, VDC Change-Over Valve and Actuator
Component Parts Location .................................... 13 . Relay Circuit .......................................................... 39
.
Schematic ............................................................. 14.
Revision: 2007 April BRC-1 2007 M35/M45
INSPECTION PROCEDURE .............................. 39 . The Braking Distance Is Long ................................52 .
Pressure Sensor Circuit ......................................... 40
. ABS Function Does Not Operate ...........................52 .
INSPECTION PROCEDURE .............................. 40 . Pedal Vibration or ABS Operation Sound Occurs ...52
Steering Angle Sensor Circuit ................................ 41
. Vehicle Jerks During VDC/TCS/ABS Control .........53 .
INSPECTION PROCEDURE .............................. 41 . WHEEL SENSOR .....................................................54 .
Stop Lamp Switch Circuit ....................................... 43
. Removal and Installation ........................................54 .
INSPECTION PROCEDURE .............................. 43 . COMPONENT .....................................................54 .
Yaw Rate/Side G Sensor Circuit ............................ 44. REMOVAL ...........................................................54
.
INSPECTION PROCEDURE .............................. 44 . INSTALLATION ...................................................54.
Brake Fluid Level Switch Circuit ............................ 46
. SENSOR ROTOR .....................................................56 .
INSPECTION PROCEDURE .............................. 46 . Removal and Installation ........................................56 .
RAS Control Unit Circuit (With RAS) ..................... 47 . REMOVAL ...........................................................56
.
INSPECTION PROCEDURE .............................. 47 . INSTALLATION ...................................................56.
ICC Sensor Integrated Unit Circuit (With ICC) ....... 48 . ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ...57
INSPECTION PROCEDURE .............................. 48 . Removal and Installation ........................................57 .
CAN Communication Circuit .................................. 48
. COMPONENT .....................................................57 .
INSPECTION PROCEDURE .............................. 48 . REMOVAL ...........................................................57
.
VDC OFF Switch Circuit ........................................ 49
. INSTALLATION ...................................................58.
INSPECTION PROCEDURE .............................. 49 . G-SENSOR ...............................................................59
.
Parking Brake Switch Circuit ................................. 50
. Removal and Installation ........................................59 .
INSPECTION PROCEDURE .............................. 50 . REMOVAL ...........................................................59
.
Warning Lamp and Indicator Lamp Circuit ............ 50 . INSTALLATION ...................................................59.
INSPECTION PROCEDURE .............................. 50 . STEERING ANGLE SENSOR ..................................60 .
TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 51 . Removal and Installation ........................................60 .
Excessive ABS Function Operation Frequency ..... 51 . REMOVAL ...........................................................60
.
Unexpected Pedal Reaction .................................. 51
. INSTALLATION ...................................................60.
Revision: 2007 April BRC-2 2007 M35/M45
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NFS000PY
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front C
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING: D
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer. E
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section. BRC
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
G
Precautions for Procedures without Cowl Top Cover NFS000PZ
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc. H
I
J
PIIB3706J
K
Precautions for Brake System NFS000Q0
q Recommended fluid is brake fluid "DOT 3". Refer to MA-12, "RECOMMENDED FLUIDS AND LUBRI-
CANTS" . L
q Do not reuse drained brake fluid.
q Be careful not to splash brake fluid on painted surface of body. If brake fluid is splashed on painted sur-
faces of body immediately wipe off then with cloth and then wash it away with water. M
q Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
q Use a flare nut wrench when removing flare nuts, and use a flare
nut crowfoot and torque wrench when tighten brake tube flare
nuts.
q When installing brake tubes, be sure to check torque.
q Brake system is an important safety part. If a brake fluid leak is
detected, always disassemble the affected part. If a malfunction
is detected, replace part with a new one.
q Before working, turn ignition switch OFF and disconnect con-
nectors of ABS actuator and electric unit (control unit) or battery
negative terminal.
SBR686C
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Revision: 2007 April BRC-3 2007 M35/M45
PRECAUTIONS
[VDC/TCS/ABS]
Precautions for Brake Control NFS000Q1
q Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may
be heard from engine compartment. This is normal condition.
q When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnostic servicing. Besides electrical system inspection, check brake booster operation, brake fluid
level, and oil leaks.
q If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
q ABS might be out of order or malfunctions by putting a radio (wiring inclusive), an antenna and a lead-in
wire near the control unit.
q If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.
q VDC system may not operate normally or a VDC OFF indicator lamp or SLIP indicator lamp may light.
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