Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti M45 Y34 2003-2004 Approved M45-Y34-2004 brc
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
VDC/TCS/ABS SELF-DIAGNOSIS ............................................. 27 . BRC
DATA MONITOR ................................................ 30 .
PRECAUTIONS ......................................................... 3 . ACTIVE TEST .................................................... 31 .
Precautions for Supplemental Restraint System Correct and Quick Diagnosis ................................. 35 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- DIAGNOSIS PRECAUTIONS ............................ 35 .
SIONER" ................................................................. 3
. Basic Inspection .................................................... 37
.
Precautions for Brake System ................................. 3 . BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
Precautions for Brake Control ................................. 3 . H
LEAKS, AND BRAKE PADS INSPECTION ........ 37 .
PREPARATION .......................................................... 5 . BASIC INSPECTION 2 POWER SYSTEM TER-
Special Service Tools .............................................. 5 . MINAL LOOSENESS AND BATTERY INSPEC-
Commercial Service Tools ....................................... 5 . TION ................................................................... 37
. I
ON-VEHICLE SERVICE ............................................ 6 . BASIC INSPECTION 3 ABS WARNING LAMP,
Adjustment of Steering Angle Sensor Neutral Posi- VDC OFF LAMP, SLIP LAMP INSPECTION ...... 37 .
tion .......................................................................... 6
. Inspection 1 Wheel Sensor System ....................... 38 . J
SYSTEM DESCRIPTION ........................................... 7 . INSPECTION PROCEDURE ............................. 38 .
System Diagram ...................................................... 7 . Inspection 2 Engine System .................................. 40 .
VDC Function .......................................................... 7 . Inspection 3 VDC/TCS/ABS Control Unit 1 ........... 40 .
TCS Function .......................................................... 7 . K
Inspection 4 Pressure Sensor System .................. 40 .
ABS Function .......................................................... 8 . Inspection 5 Steering Angle Sensor System ......... 42 .
EBD Function .......................................................... 8 . Inspection 6 Yaw Rate/Side G Sensor System ..... 43 .
Fail-Safe Function ................................................... 8 . Inspection 7 Solenoid and VDC Change-Over Valve L
VDC / TCS SYSTEM ............................................ 8 . System ................................................................... 45
.
ABS, EBD SYSTEM ............................................. 8 . Inspection 8 ABS Motor and Motor Relay System... 48
Hydraulic Circuit Diagram ....................................... 9 . Inspection 9 Solenoid Valve Relay System ........... 50 . M
CAN COMMUNICATION ......................................... 10 . Inspection 10 Stop Lamp Switch System .............. 51 .
System Description ............................................... 10 . Inspection 11 VDC/TCS/ABS Control Unit Power
TROUBLE DIAGNOSIS ............................................11 . and Ground Systems ............................................. 52 .
How to Proceed with Diagnosis .............................11 . Inspection 12 VDC/TCS/ABS Control Unit 2 ......... 54 .
BASIC CONCEPT ...............................................11 . Inspection 13 Brake Fluid Level Sensor System ... 54
DIAGNOSIS FLOWCHART ............................... 12 . Inspection 14 CAN Communication System .......... 55 .
ASKING COMPLAINTS ..................................... 13 . Inspection 15 When "SHIFT POSITION ERROR"
EXAMPLE OF DIAGNOSIS SHEET .................. 13 . Appears in Self-Diagnosis Results Display ........... 55 .
Component Installation Location ........................... 14 . Inspecting Components ......................................... 56 .
Schematic ............................................................. 15. VDC OFF SWITCH ............................................ 56 .
Wiring Diagram -- VDC -- .................................... 16 . VDC RELAY BOX ............................................... 56 .
Control Unit Input/Output Signal Standard ............ 24 . VDC ACTUATOR ............................................... 57 .
REFERENCE VALUE FROM CONSULT-II ........ 24 . Symptom 1 Excessive ABS Function Operation Fre-
CONSULT-II Functions .......................................... 26 . quency ................................................................... 59
.
CONSULT-II MAIN FUNCTION .......................... 26 . Symptom 2 Unexpected Pedal Reaction ............... 60 .
CONSULT-II BASIC OPERATION PROCEDURE Symptom 3 The Braking Distance Is Long ............ 60 .
... 26
Revision: 2004 October BRC-1 2004 M45
Symptom 4 The ABS Function Does Not Operate... 60 SENSOR ROTOR .....................................................66 .
Symptom 5 Pedal Vibration or ABS Operation Removal and Installation ........................................66 .
Sound Occurs ........................................................ 61. REMOVAL ...........................................................66
.
Symptom 6 Vehicle Jerks During VDC/TCS/ABS INSTALLATION ...................................................66.
Control ................................................................... 61
. VDC/TCS/ABS ACTUATOR .....................................67 .
WHEEL SENSORS .................................................. 63 . Removal and Installation ........................................67 .
Removal and Installation ....................................... 63 . G SENSOR ...............................................................68
.
REMOVAL .......................................................... 63 . Removal and Installation ........................................68 .
INSTALLATION ................................................... 63 . REMOVAL ...........................................................68
.
VDC/TCS/ABS CONTROL UNIT ............................. 65 . INSTALLATION ...................................................68.
Removal and Installation ....................................... 65 . STEERING ANGLE SENSOR ..................................69 .
REMOVAL .......................................................... 65 . Removal and Installation ........................................69 .
INSTALLATION ................................................... 65 . REMOVAL ...........................................................69
.
INSTALLATION ...................................................69.
Revision: 2004 October BRC-2 2004 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" AFS0029X
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 Brake System AFS000KZ
q Recommended fluid is brake fluid "DOT 3".
H
q Do not reuse drained brake fluid.
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.
I
q Never use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.
q Using a flare nut torque wrench, securely tighten brake tube
J
flare nuts.
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. K
q Before working, turn ignition switch OFF and disconnect electri-
cal connectors of VDC actuator or battery negative terminals.
q When installing brake piping, be sure to check torque. L
SBR686C
M
Precautions for Brake Control AFS001JS
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.
Revision: 2004 October BRC-3 2004 M45
PRECAUTIONS
[VDC/TCS/ABS]
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 lamp
and SLIP lamp may turn on or the VDC system may not operate properly. Components related to suspen-
sion (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.), Compo-
nents 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 lump and the SLIP 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.
Revision: 2004 October BRC-4 2004 M45
PREPARATION
[VDC/TCS/ABS]
PREPARATION PFP:00002
A
Special Service Tools AFS001I1
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
ST30720000
(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 AFS000L3
J
Tool name Description
K
1.Flare nut crowfoot
a:10 mm (0.39 in)/12 mm (0.47 in) Removing and installing each brake piping
2.Torque wrench L
S-NT360
M
Revision: 2004 October BRC-5 2004 M45
ON-VEHICLE SERVICE
[VDC/TCS/ABS]
ON-VEHICLE SERVICE PFP:00000
Adjustment of Steering Angle Sensor Neutral Position AFS000L4
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.
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing VDC/TCS/ABS control unit -
Replacing VDC/TCS/ABS control unit -
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