Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti G35 2003-2005 Coupe Sedan Approved Infiniti G35 Coupe 2003 brc
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS Schematic .............................................................. 19
. BRC
Wiring Diagram -- VDC -- .................................... 20 .
PRECAUTIONS ......................................................... 3 . Control Unit Input/Output Signal Standard ............ 27 .
Precautions for Supplemental Restraint System STANDARDS BY CONSULT-II ........................... 27 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CONSULT-II Functions .......................................... 29 .
SIONER" ................................................................. 3
. CONSULT-II MAIN FUNCTION .......................... 29 .
Precautions for Battery Service ............................... 3 . SELF-DIAGNOSIS ............................................. 29 .
Precautions for Brake System ................................. 3 . H
DATA MONITOR ................................................ 32 .
Precautions for Brake Control ................................. 4 . ACTIVE TEST .................................................... 34 .
Diagnosis Precaution .............................................. 4 . For Fast and Accurate Diagnosis .......................... 38 .
CAN SYSTEM ...................................................... 4 . PRECAUTIONS FOR DIAGNOSIS .................... 38 . I
Precaution for Harness Repair ................................ 4 . Basic Inspection .................................................... 40
.
CAN SYSTEM ...................................................... 4 . BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
PREPARATION .......................................................... 6 . LEAKS, AND BRAKE PADS INSPECTION ........ 40 . J
Special Service Tools .............................................. 6 . BASIC INSPECTION 2 POWER SYSTEM TER-
Commercial Service Tools ....................................... 6 . MINAL LOOSENESS AND BATTERY INSPEC-
ON-VEHICLE SERVICE ............................................ 7 . TION ................................................................... 40
.
Adjustment of Steering Angle Sensor Neutral Posi- K
BASIC INSPECTION 3 ABS WARNING LAMP,
tion .......................................................................... 7
. VDC OFF INDICATOR LAMP, SLIP INDICATOR
GENERAL INFORMATION ........................................ 8 . LAMP INSPECTION ........................................... 40 .
System Diagram ...................................................... 8 . Inspection 1 Wheel Sensor System ....................... 41 . L
VDC Function .......................................................... 8 . INSPECTION PROCEDURE ............................. 41 .
TCS Function .......................................................... 8 . Inspection 2 Engine System .................................. 43 .
ABS Function .......................................................... 9 . Inspection 3 VDC/TCS/ABS Control Unit 1 ........... 43 . M
EBD Function .......................................................... 9 . Inspection 4 Pressure Sensor System .................. 43 .
Fail-Safe Function ................................................... 9 . Inspection 5 Steering Angle Sensor System ......... 45 .
VDC / TCS SYSTEM ............................................ 9 . Inspection 6 Yaw Rate / Side G Sensor System ... 46
ABS, EBD SYSTEM ............................................. 9 . Inspection 7 Solenoid and VDC Change-Over Valve
Hydraulic Circuit Diagram ..................................... 10 . System ................................................................... 48
.
CAN COMMUNICATION ..........................................11 . Inspection 8 ABS Motor and Motor Relay System... 50
System Description ................................................11 . Inspection 9 Solenoid Valve Relay System ........... 52 .
CAN Communication Unit ......................................11 . Inspection 10 Stop Lamp Switch System .............. 53 .
TYPE 1 ................................................................11
. Inspection 11 VDC/TCS/ABS Control Unit Power
TYPE 2 ............................................................... 13
. and Ground Systems ............................................. 54 .
TROUBLE DIAGNOSIS ........................................... 15 . Inspection 12 VDC/TCS/ABS Control Unit 2 ......... 55 .
How to Proceed With Diagnosis ............................ 15 . Inspection 13 Brake Fluid Level Sensor System ... 56
BASIC CONCEPT .............................................. 15 . Inspection 14 CAN Communication System .......... 57 .
DIAGNOSIS FLOWCHART ............................... 16 . Inspection 15 When "SHIFT POSITION ERROR"
ASKING COMPLAINTS ..................................... 17 . Appears in Self-Diagnosis Results Display (For A/
EXAMPLE OF DIAGNOSIS SHEET .................. 17 . T Models) ............................................................... 57
.
Component Installation Location ........................... 18 .
Revision; 2004 April BRC-1 2003 G35 Coupe
Inspecting Components ......................................... 58 . VDC/TCS/ABS CONTROL UNIT .............................65 .
VDC OFF SWITCH ............................................ 58 . Removal and Installation ........................................65 .
VDC RELAY BOX ............................................... 58 . REMOVAL ...........................................................65
.
VDC ACTUATOR ................................................ 59 . INSTALLATION ...................................................65.
Symptom 1 Excessive ABS Function Operation Fre- SENSOR ROTOR .....................................................66 .
quency ................................................................... 59
. Removal and Installation ........................................66 .
Symptom 2 Unexpected Pedal Reaction ............... 60 . REMOVAL ...........................................................66
.
Symptom 3 The Braking Distance Is Long ............ 61 . INSTALLATION ...................................................66.
Symptom 4 The ABS Function Does Not Operate... 61 VDC/TCS/ABS ACTUATOR .....................................67 .
Symptom 5 Pedal Vibration or ABS Operation Removal and Installation ........................................67 .
Sound Occurs ........................................................ 62. G SENSOR ...............................................................68
.
Symptom 6 Vehicle Jerks During VDC/TCS/ABS Removal and Installation ........................................68 .
Control ................................................................... 62
. REMOVAL ...........................................................68
.
WHEEL SENSORS .................................................. 64 . INSTALLATION ...................................................68.
Removal and Installation ....................................... 64 . STEERING ANGLE SENSOR ..................................69 .
REMOVAL .......................................................... 64 . Removal and Installation ........................................69 .
INSTALLATION ................................................... 64 . REMOVAL ...........................................................69
.
INSTALLATION ...................................................69.
Revision; 2004 April BRC-2 2003 G35 Coupe
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AFS00139
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 Battery Service AFS001KT
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the H
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
I
Precautions for Brake System AFS0013A
q Recommended fluid is brake fluid "DOT 3".
q Never reuse drained brake fluid. J
q Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off
and flush area with water immediately.
q Never use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause K
improper operation.
q Using a flare nut torque wrench, securely tighten brake tube
flare nuts. L
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.
M
q Before working, turn ignition switch OFF and disconnect electri-
cal connectors of VDC actuator and control module or battery
terminals.
q When installing brake piping, be sure to check torque.
SBR686C
Revision; 2004 April BRC-3 2003 G35 Coupe
PRECAUTIONS
[VDC/TCS/ABS]
Precautions for Brake Control AFS001IC
q During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
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 a normal status of operation check.
q Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
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 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 If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.
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 If the following components are replaced with non-genuine components or converted, the VDC OFF indi-
cator lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Compo-
nents 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.).
q Driving in the condition of breakage or excessive wear of the suspension, tires or components related to
the brakes may cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC
system may not operate properly.
q When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur if the
brake pedal is used. The noise is a result of the normal operation of the TCS and VDC.
q 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 the VDC warning lamp may turn on.
However, this is not a problem if normal operation can be resumed after restarting the engine.
q Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC SW
ON) may cause the yaw rate/side G -sensor system indicate a problem. However this is not a problem if
normal operation can be resumed after restarting the engine.
Diagnosis Precaution AFS0013C
CAN SYSTEM
q Do not apply voltage of 7.0V or higher to terminal to be measured.
q Maximum open terminal voltage of tester in use shall be 7.0V or lower.
q Before checking harnesses, turn ignition switch to OFF and disconnect battery negative cable.
Precaution for Harness Repair AFS0013D
CAN SYSTEM
q Area to be repaired shall be soldered, and wrapped with a tape
(be sure that fraying of twisted wire shall be within 110 mm 4.33
in)).
PKIA0306E
Revision; 2004 April BRC-4 2003 G35 Coupe
PRECAUTIONS
[VDC/TCS/ABS]
q Do not make a bypass connection to repaired area. (If it is done,
branch part will be removed and characteristics of twisted wire A
will be lost.)
B
C
PKIA0307E
D
E
BRC
G
H
I
J
K
L
M
Revision; 2004 April BRC-5 2003 G35 Coupe
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
Special Service Tools AFS001I3
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.) Description
Tool name
ST3072 000
(J25405)
Drift Installing rear sensor rotor.
a: 76.5mm (3.012 in) dia.
b: 55.0mm (2.17 in) dia.
ZZC0760D
ST2786 3000
(--) Installing rear sensor rotor.
Drift
ZZC1307D
KV401 04710
(--) Installing rear sensor rotor.
Drift
ZZC1082D
Commercial Service Tools AFS0013E
Tool name Description
1.Flare nut crowfoot
a:10mm (0.39 in) Removing and installing each brake piping
2.Torque wrench
S-NT360
Revision; 2004 April BRC-6 2003 G35 Coupe
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
A
Adjustment of Steering Angle Sensor Neutral Position AFS0013F
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. B
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing VDC/TCS/ABS control unit -
Replacing VDC/TCS/ABS control unit -
C
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