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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS DATA MONITOR ................................................ 28 . BRC
ACTIVE TEST .................................................... 30 .
PRECAUTIONS ......................................................... 3 . For Fast and Accurate Diagnosis .......................... 34 .
Precautions for Supplemental Restraint System PRECAUTIONS FOR DIAGNOSIS .................... 34 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Basic Inspection .................................................... 36
.
SIONER" ................................................................. 3
. BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
Precautions for Battery Service ............................... 3 . LEAKS, AND BRAKE PADS INSPECTION ........ 36 .
Precautions for Brake System ................................. 3 . H
BASIC INSPECTION 2 POWER SYSTEM TER-
Precautions for Brake Control ................................. 4 . MINAL LOOSENESS AND BATTERY INSPEC-
PREPARATION .......................................................... 5 . TION ................................................................... 36
.
Special Service Tools .............................................. 5 . BASIC INSPECTION 3 ABS WARNING LAMP, I
Commercial Service Tools ....................................... 5 . VDC OFF INDICATOR LAMP, SLIP INDICATOR
ON-VEHICLE SERVICE ............................................ 6 . LAMP INSPECTION ........................................... 36 .
Adjustment of Steering Angle Sensor Neutral Posi- Inspection 1 Wheel Sensor System ....................... 37 . J
tion .......................................................................... 6
. INSPECTION PROCEDURE ............................. 37 .
GENERAL INFORMATION ........................................ 7 . Inspection 2 Engine System .................................. 39 .
System Diagram ...................................................... 7 . Inspection 3 VDC/TCS/ABS Control Unit 1 ........... 39 .
VDC Function .......................................................... 7 . K
Inspection 4 Pressure Sensor System .................. 39 .
TCS Function .......................................................... 7 . Inspection 5 Steering Angle Sensor System ......... 41 .
ABS Function .......................................................... 8 . Inspection 6 Yaw Rate / Side G Sensor System ... 42
EBD Function .......................................................... 8 . Inspection 7 Solenoid and VDC Change-Over Valve L
Fail-Safe Function ................................................... 8 . System ................................................................... 44
.
VDC / TCS SYSTEM ............................................ 8 . Inspection 8 ABS Motor and Motor Relay System... 47
ABS, EBD SYSTEM ............................................. 8 . Inspection 9 Solenoid Valve Relay System ........... 49 . M
Hydraulic Circuit Diagram ....................................... 9 . Inspection 10 Stop Lamp Switch System .............. 50 .
CAN COMMUNICATION ......................................... 10 . Inspection 11 VDC/TCS/ABS Control Unit Power
System Description ............................................... 10 . and Ground Systems ............................................. 51 .
TROUBLE DIAGNOSIS ............................................11 . Inspection 12 VDC/TCS/ABS Control Unit 2 ......... 52 .
How to Proceed With Diagnosis .............................11 . Inspection 13 Brake Fluid Level Sensor System ... 53
BASIC CONCEPT ...............................................11 . Inspection 14 CAN Communication System .......... 53 .
DIAGNOSIS FLOWCHART ............................... 12 . Inspection 15 When "SHIFT POSITION ERROR"
ASKING COMPLAINTS ..................................... 13 . Appears in Self-Diagnosis Results Display (For A/
EXAMPLE OF DIAGNOSIS SHEET .................. 13 . T Models) ............................................................... 54
.
Component Installation Location ........................... 14 . Inspecting Components ......................................... 54 .
Schematic ............................................................. 15. VDC OFF SWITCH ............................................ 54 .
Wiring Diagram -- VDC -- .................................... 16 . VDC RELAY BOX ............................................... 55 .
Control Unit Input/Output Signal Standard ............ 23 . VDC ACTUATOR ............................................... 56 .
STANDARDS BY CONSULT-II ........................... 23 . Symptom 1 Excessive ABS Function Operation Fre-
CONSULT-II Functions .......................................... 25 . quency ................................................................... 56
.
CONSULT-II MAIN FUNCTION .......................... 25 . Symptom 2 Unexpected Pedal Reaction ............... 57 .
SELF-DIAGNOSIS ............................................. 25 .
BRC-1
Symptom 3 The Braking Distance Is Long ............ 58 . SENSOR ROTOR .....................................................63 .
Symptom 4 The ABS Function Does Not Operate... 58 Removal and Installation ........................................63 .
Symptom 5 Pedal Vibration or ABS Operation REMOVAL ...........................................................63
.
Sound Occurs ........................................................ 59. INSTALLATION ...................................................63.
Symptom 6 Vehicle Jerks During VDC/TCS/ABS VDC/TCS/ABS ACTUATOR .....................................64 .
Control ................................................................... 59
. Removal and Installation ........................................64 .
WHEEL SENSORS .................................................. 61 . G SENSOR ...............................................................65
.
Removal and Installation ....................................... 61 . Removal and Installation ........................................65 .
REMOVAL .......................................................... 61 . REMOVAL ...........................................................65
.
INSTALLATION ................................................... 61 . INSTALLATION ...................................................65.
VDC/TCS/ABS CONTROL UNIT ............................. 62 . STEERING ANGLE SENSOR ..................................66 .
Removal and Installation ....................................... 62 . Removal and Installation ........................................66 .
REMOVAL .......................................................... 62 . REMOVAL ...........................................................66
.
INSTALLATION ................................................... 62 . INSTALLATION ...................................................66.
BRC-2
PRECAUTIONS
[VDC/TCS/ABS]
PRECAUTIONS
[VDC/TCS/ABS] PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AFS0027D
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 AFS002A3
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 wrench, securely tighten brake tube flare nuts.
q Brake system is an important safety part. If a brake fluid leak is L
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- M
nectors of VDC actuator and control unit or battery negative ter-
minal.
q When installing brake piping, be sure to check torque.
SBR686C
BRC-3
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 OFF indicator 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 OFF
switch to turn 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.
BRC-4
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools AFS001I3
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
B
(Kent-Moore No.) Description
Tool name
C
ST3072000
(J25405)
Drift Installing rear sensor rotor. D
a: 76.5mm (3.012 in) dia.
b: 55.0mm (2.17 in) dia.
ZZC0760D
E
ST27863000 BRC
(--) Installing rear sensor rotor.
Drift
G
ZZC1307D
H
KV40104710
(--) Installing rear sensor rotor.
Drift
I
ZZC1082D
Commercial Service Tools AFS0013E
J
Tool name Description
K
1.Flare nut crowfoot
a:10mm (0.39 in), 12mm(0.47 in) Removing and installing each brake piping
2.Torque wrench L
S-NT360
M
BRC-5
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position AFS0013F
After removing/installing or replacing VDC/TCS/ABS control unit, steering angle sensor, steering components,
suspension components, or after adjusting wheel alignment, make sure to adjust neutral position of steering
angle sensor before running vehicle.
Situation Adjustment of Steering Angle Sensor Neutral Position
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