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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
ABS BASIC INSPECTION 1 BRAKE FLUID AMOUNT, BRC
LEAKS, AND BRAKE PADS INSPECTION ........ 28 .
PRECAUTIONS ......................................................... 4
. BASIC INSPECTION 2 POWER SYSTEM TER-
Precautions for Battery Service ............................... 4 . MINAL LOOSENESS AND BATTERY INSPEC- G
Precautions for Brake System ................................. 4 . TION ................................................................... 28
.
Precautions for Brake Control ................................. 4 . BASIC INSPECTION 3 ABS WARNING LAMP
PREPARATION .......................................................... 5
. INSPECTION ..................................................... 28 .
Special Service Tools .............................................. 5
. H
Inspection 1 Wheel Sensor System ....................... 29 .
Commercial Service Tools ....................................... 5. INSPECTION PROCEDURE ............................. 29 .
SYSTEM DESCRIPTION ........................................... 6 . Inspection 2 Engine System .................................. 31 .
System Diagram ...................................................... 6
. Inspection 3 ABS Actuator and Electric Unit (Control I
ABS Function .......................................................... 6
. Unit) ....................................................................... 31
.
EBD Function .......................................................... 6
. Inspection 4 ABS Actuator and Electric Unit (Control
Fail-Safe Function ................................................... 6
. Unit) Power and Ground Systems ......................... 31 . J
ABS, EBD SYSTEM ............................................. 6 . Inspection 5 ABS Actuator Relay or ABS Motor
Hydraulic Circuit Diagram ....................................... 7
. Relay Power System ............................................. 33 .
CAN COMMUNICATION ........................................... 8 . Inspection 6 Stop Lamp Switch System ................ 34 .
System Description ................................................. 8
. K
Inspection 7 ABS Actuator and Electric Unit (Control
TROUBLE DIAGNOSIS ............................................. 9 . Unit) 2 .................................................................... 35
.
How to Proceed with Diagnosis .............................. 9 . Inspection 8 CAN Communication System ............ 35 .
BASIC CONCEPT ................................................ 9. Symptom 1 Excessive ABS Function Operation Fre- L
DIAGNOSIS FLOWCHART ............................... 10 . quency ................................................................... 36
.
ASKING COMPLAINTS ......................................11 . Symptom 2 Unexpected Pedal Reaction ............... 36 .
EXAMPLE OF DIAGNOSIS SHEET ...................11 . Symptom 3 The Braking Distance is Long ............ 37 . M
Component Parts Location .................................... 12 . Symptom 4 The ABS Function Does Not Operate 37 ...
Schematic -- ABS -- ............................................ 13
. Symptom 5 Pedal Vibration or ABS Operation
Wiring Diagram -- ABS -- .................................... 14 . Sound Occurs ........................................................ 37 .
Control Unit Input/Output Signal Standard ............ 18 . WHEEL SENSORS .................................................. 38 .
REFERENCE VALUE FROM CONSULT-II ........ 18 . Removal and Installation ....................................... 38 .
CONSULT- II Functions ......................................... 19. REMOVAL .......................................................... 38 .
CONSULT-II MAIN FUNCTION .......................... 19 . INSTALLATION .................................................. 38 .
CONSULT-II BASIC OPERATION PROCEDURE SENSOR ROTOR .................................................... 39 .
... 19 Removal and Installation ....................................... 39 .
SELF-DIAGNOSIS ............................................. 21 . REMOVAL .......................................................... 39 .
DATA MONITOR ................................................ 23. INSTALLATION .................................................. 39 .
ACTIVE TEST .................................................... 25
. ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
Correct and Quick Diagnosis ................................ 27 . BLY) .......................................................................... 40
.
DIAGNOSIS PRECAUTIONS ............................ 27 . Removal and Installation ....................................... 40 .
Basic Inspection .................................................... 28
.
Revision: 2004 December BRC-1 2004.5 350Z
TCS/ABS Inspection 6 Stop Lamp Switch System .................77 .
Inspection 7 ABS Actuator and Electric Unit (Control
PRECAUTIONS ........................................................ 41 . Unit) 2 ....................................................................78
.
Precautions for Battery Service ............................. 41 . Inspection 8 CAN Communication System ............78 .
Precautions for Brake System ............................... 41 . Component Inspection ...........................................79 .
Precautions for Brake Control ............................... 41 . TCS OFF SWITCH .............................................79 .
PREPARATION ........................................................ 42 . Symptom 1 Excessive ABS Function Operation Fre-
Special Service Tools ............................................ 42 . quency ...................................................................79
.
Commercial Service Tools ..................................... 42 . Symptom 2 Unexpected Pedal Reaction ...............79 .
SYSTEM DESCRIPTION ......................................... 43 . Symptom 3 The Braking Distance Is Long .............80 .
System Diagram .................................................... 43 . Symptom 4 The ABS Function Does Not Operate...80
TCS Function ......................................................... 43 . Symptom 5 Pedal Vibration or ABS Operation
ABS Function ......................................................... 43 . Sound Occurs ........................................................80 .
EBD Function ........................................................ 43 . Symptom 6 The Vehicle Jerks Around During TCS/
Fail-Safe Function ................................................. 43 . ABS Control ...........................................................81 .
TCS SYSTEM ..................................................... 43 . WHEEL SENSORS ..................................................83 .
ABS, EBD SYSTEM ........................................... 44 . Removal and Installation ........................................83 .
Hydraulic Circuit Diagram ...................................... 44 . REMOVAL ...........................................................83 .
CAN COMMUNICATION .......................................... 45 . INSTALLATION ...................................................83 .
System Description ................................................ 45 . SENSOR ROTOR .....................................................84 .
TROUBLE DIAGNOSIS ........................................... 46 . Removal and Installation ........................................84 .
How to Proceed with Diagnosis ............................. 46 . REMOVAL ...........................................................84 .
BASIC CONCEPT .............................................. 46 . INSTALLATION ...................................................84 .
DIAGNOSIS FLOWCHART ................................ 47 . ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
ASKING COMPLAINTS ...................................... 48 . BLY) ..........................................................................85
.
EXAMPLE OF DIAGNOSIS SHEET ................... 48 . Removal and Installation ........................................85 .
Component Parts Location .................................... 49 .
Schematic -- TCS -- ............................................ 50 .
Wiring Diagram -- TCS -- .................................... 51 .
VDC/TCS/ABS
Wiring Diagram -- TCS -- ROAD STAR ............... 55 . PRECAUTIONS ........................................................86 .
Control Unit Input/Output Signal Standard ............. 59 . Precautions for Supplemental Restraint System
REFERENCE VALUE FROM CONSULT-II ........ 59 . (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
CONSULT- II Functions ......................................... 61 . SIONER" ................................................................86 .
CONSULT-II MAIN FUNCTION .......................... 61 . Precautions for Battery Service .............................86 .
CONSULT-II BASIC OPERATION PROCEDURE Precautions for Brake System ...............................86 .
... 61 Precautions for Brake Control ................................87 .
SELF-DIAGNOSIS ............................................. 63 . PREPARATION ........................................................88 .
DATA MONITOR ................................................. 65 . Special Service Tools .............................................88 .
ACTIVE TEST .................................................... 68 . Commercial Service Tools .....................................88 .
Correct and Quick Diagnosis ................................. 70 . ON-VEHICLE SERVICE ...........................................89 .
DIAGNOSIS PRECAUTIONS ............................. 70 . Adjustment of Steering Angle Sensor Neutral Posi-
Basic Inspection .................................................... 71 . tion .........................................................................89
.
BASIC INSPECTION 1 BRAKE FLUID AMOUNT, SYSTEM DESCRIPTION ..........................................90 .
LEAKS, AND BRAKE PADS INSPECTION ........ 71 . System Diagram ....................................................90 .
BASIC INSPECTION 2 POWER SYSTEM TER- VDC Function .........................................................90 .
MINAL LOOSENESS AND BATTERY INSPEC- TCS Function .........................................................90 .
TION ................................................................... 71
. ABS Function .........................................................91 .
BASIC INSPECTION 3 ABS WARNING LAMP, EBD Function .........................................................91 .
TCS OFF INDICATOR LAMP, SLIP INDICATOR Fail-Safe Function ..................................................91 .
LAMP INSPECTION ........................................... 71 . VDC / TCS SYSTEM ..........................................91 .
Inspection 1 Wheel Sensor System ....................... 72 . ABS, EBD SYSTEM ............................................91 .
INSPECTION PROCEDURE .............................. 72 . Hydraulic Circuit Diagram ......................................92 .
Inspection 2 Engine System .................................. 74 . CAN COMMUNICATION ..........................................93 .
Inspection 3 ABS Actuator and Electric Unit (Control System Description ................................................93 .
Unit) ....................................................................... 74
. TROUBLE DIAGNOSIS ...........................................94 .
Inspection 4 ABS Actuator and Electric Unit (Control How to Proceed With Diagnosis ............................94 .
Unit) Power and Ground Systems ......................... 74 . BASIC CONCEPT ...............................................94 .
Inspection 5 ABS Actuator Relay or ABS Motor DIAGNOSIS FLOWCHART ................................95 .
Relay Power System ............................................. 76 . ASKING COMPLAINTS ......................................96 .
Revision: 2004 December BRC-2 2004.5 350Z
EXAMPLE OF DIAGNOSIS SHEET .................. 96 . Inspection 12 VDC/TCS/ABS Control Unit 2 ....... 136 .
Component Parts Location .................................... 97 . Inspection 13 Brake Fluid Level Sensor System . 136 A
Schematic ............................................................. 98
. Inspection 14 CAN Communication System ........ 137 .
Wiring Diagram -- VDC -- .................................... 99 . Component Inspection ......................................... 137 .
Control Unit Input/Output Signal Standard .......... 106 . VDC OFF SWITCH .......................................... 137 . B
REFERENCE VALUE FROM CONSULT-II ...... 106 . ABS MOTOR RELAY AND ACTUATOR RELAY 138 .
CONSULT-II Functions ........................................ 108 . VDC/TCS/ABS ACTUATOR ............................. 138 .
CONSULT-II MAIN FUNCTION ........................ 108 . Symptom 1 Excessive ABS Function Operation Fre-
CONSULT-II BASIC OPERATION PROCEDURE quency ................................................................. 138
. C
. 109 Symptom 2 Unexpected Pedal Reaction ............. 139 .
SELF-DIAGNOSIS ........................................... 109 . Symptom 3 The Braking Distance Is Long .......... 139 .
DATA MONITOR ...............................................112 . Symptom 4 The ABS Function Does Not Operate 140 . D
ACTIVE TEST ...................................................116 . Symptom 5 Pedal Vibration or ABS Operation
Correct and Quick Diagnosis ...............................117 . Sound Occurs ...................................................... 141 .
DIAGNOSIS PRECAUTIONS ...........................117 . Symptom 6 Vehicle Jerks During VDC/TCS/ABS E
Basic Inspection ...................................................118 . Control ................................................................. 141
.
BASIC INSPECTION 1 BRAKE FLUID AMOUNT, WHEEL SENSORS ................................................ 143 .
LEAKS, AND BRAKE PADS INSPECTION ......118 . Removal and Installation ..................................... 143 .
BASIC INSPECTION 2 POWER SYSTEM TER- REMOVAL ........................................................ 143 . BRC
MINAL LOOSENESS AND BATTERY INSPEC- INSTALLATION ................................................ 143 .
TION ..................................................................119
. VDC/TCS/ABS CONTROL UNIT ........................... 144 .
BASIC INSPECTION 3 ABS WARNING LAMP, Removal and Installation ..................................... 144 . G
VDC OFF INDICATOR LAMP, SLIP INDICATOR REMOVAL ........................................................ 144 .
LAMP INSPECTION .........................................119 . INSTALLATION ................................................ 144 .
Inspection 1 Wheel Sensor System .....................119 . SENSOR ROTOR .................................................. 145 . H
INSPECTION PROCEDURE ............................119 . Removal and Installation ..................................... 145 .
Inspection 2 Engine System ................................ 122 . REMOVAL ........................................................ 145 .
Inspection 3 VDC/TCS/ABS Control Unit 1 ......... 122 . INSTALLATION ................................................ 145 .
I
Inspection 4 Pressure Sensor System ................ 122 . VDC/TCS/ABS ACTUATOR .................................. 146 .
Inspection 5 Steering Angle Sensor System ....... 124 . Removal and Installation ..................................... 146 .
Inspection 6 Yaw Rate Sensor /Side G Sensor Sys- G SENSOR ............................................................. 147
.
tem ...................................................................... 125
. Removal and Installation ..................................... 147 . J
Inspection 7 Solenoid and VDC Change-Over Valve REMOVAL ........................................................ 147 .
System ................................................................ 127
. INSTALLATION ................................................ 147 .
Inspection 8 ABS Motor and Motor Relay System 129 . STEERING ANGLE SENSOR ............................... 148 . K
Inspection 9 Actuator Relay System ................... 132 . Removal and Installation ..................................... 148 .
Inspection 10 Stop Lamp Switch System ............ 133 . REMOVAL ........................................................ 148 .
Inspection 11 VDC/TCS/ABS Control Unit Power INSTALLATION ................................................ 148 . L
and Ground Systems .......................................... 134 .
M
Revision: 2004 December BRC-3 2004.5 350Z
PRECAUTIONS
[ABS]
PRECAUTIONS
[ABS] PFP:00001
Precautions for Battery Service AFS0028N
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
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Brake System AFS0028O
q Recommended fluid is brake fluid "DOT 3".
q Never 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.
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
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.
q Before working, turn ignition switch OFF.
q When installing brake piping, be sure to check torque.
SBR686C
Precautions for Brake Control AFS0028P
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.
Revision: 2004 December BRC-4 2004.5 350Z
PREPARATION
[ABS]
PREPARATION PFP:00002
A
Special Service Tools AFS0028R
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
ST3072 0000
(J 25405)
Drift D
a: 77 mm (0.03 in) dia.
b: 55 mm (2.17 in) dia.
ZZA0701D
E
ST2786 3000
( -- )
Installation rear sensor rotor BRC
Drift
a: 75 mm (2.95 in) dia.
b: 62 mm (2.44 in) dia.
ZZA0832D G
KV401 04710
( -- ) H
Drift
a: 76 mm (2.99 in) dia.
b: 68.5 mm (2.697in) dia.
I
ZZA0832D
Commercial Service Tools AFS0028S
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 December BRC-5 2004.5 350Z
SYSTEM DESCRIPTION
[ABS]
SYSTEM DESCRIPTION PFP:00000
System Diagram AFS0028T
SFIA0949E
ABS Function AFS0028U
q The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves
handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.
q If the electrical system breaks down, then the Fail-Safe function starts, the ABS becomes inoperative,
and the ABS warning lamp turns on.
q Electrical System Diagnosis by CONSULT-II is available.
EBD Function AFS0028V
q Electronic Brake Distributor is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the Brake Fluid Pressure
which results in reduced rear wheel slippage.
q In case of electrical system break down, the Fail-Safe function is activated, the EBD and ABS becomes
inoperative, and the ABS warning lamp and brake warning lamp are turned on.
q Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe Function AFS0028W
ABS, EBD SYSTEM
In case of electrical problems with the ABS, the ABS warning lamp will turn on. In case of electrical problem
with the EBD, Brake warning lamp, ABS warning lamp will turn on. Simultaneously, the ABS become one of
the following conditions of the Fail-Safe function.
1. For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
cles without ABS equipment.
2. For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
the condition of vehicles without ABS, EBD equipment.
NOTE:
In condition 1 described above, an ABS Self Diagnosis sound may be heard. That is a normal condition
because a self diagnosis for "Key Switch ON" and "the First Starting" are being performed.
Revision: 2004 December BRC-6 2004.5 350Z
SYSTEM DESCRIPTION
[ABS]
Hydraulic Circuit Diagram AFS0028X
A
B
C
D
E
BRC
G
H
SFIA1877E I
J
K
L
M
Revision: 2004 December BRC-7 2004.5 350Z
CAN COMMUNICATION
[ABS]
CAN COMMUNICATION PFP:23710
System Description AFS0028Y
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only. Refer to LAN-5, "CAN Com-
munication Unit" .
Revision: 2004 December BRC-8 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
TROUBLE DIAGNOSIS PFP:00004
A
How to Proceed with Diagnosis AFS00290
BASIC CONCEPT
q Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle B
thoroughly.
q It is also important to clarify customer complaints before inspec-
tion. C
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with D
customer.
NOTE:
Customers are not professionals. Do not assume "maybe cus-
E
tomer means..." or "maybe customer mentioned this symptom".
EFJ0028D
BRC
q It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce G
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand. H
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.
q After diagnosis, make sure to carry out "erase memory". Refer to I
BRC-21, "Operation Procedure" . SEF233G
q For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit. J
q Always read "GI General Information" to confirm general precautions. Refer to GI-4, "General Precau-
tions" .
K
L
M
Revision: 2004 December BRC-9 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
DIAGNOSIS FLOWCHART
SFIA0953E
Revision: 2004 December BRC-10 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
ASKING COMPLAINTS
q Complaints against malfunction vary depending on each person. A
It is important to clarify customer complaints.
q Ask customer about what symptoms are present and under
what conditions. Use information to reproduce symptom while B
driving.
q It is also important to use diagnosis sheet so as not to miss infor-
mation. C
SBR339B
D
EXAMPLE OF DIAGNOSIS SHEET
E
BRC
G
H
I
J
K
L
M
SFIA0791E
Revision: 2004 December BRC-11 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
Component Parts Location AFS00291
SFIA1746E
Revision: 2004 December BRC-12 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
Schematic -- ABS -- AFS00292
A
B
C
D
E
BRC
G
H
I
J
K
L
M
TFWT0042E
Revision: 2004 December BRC-13 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
Wiring Diagram -- ABS -- AFS00293
TFWT0153E
Revision: 2004 December BRC-14 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
G
H
I
J
K
L
M
TFWT0154E
Revision: 2004 December BRC-15 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
TFWT0165E
Revision: 2004 December BRC-16 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
G
H
I
J
K
L
M
TFWT0046E
Revision: 2004 December BRC-17 2004.5 350Z
TROUBLE DIAGNOSIS
[ABS]
Control Unit Input/Output Signal Standard AFS00294
REFERENCE VALUE FROM CONSULT-II
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.
Data monitor
Reference values Reference: Error inspec-
Monitor item Display Content
Condition for normal opera- tion checklist
tion
Vehicle stopped 0 km/h (0 MPH)
Wheel speed calcu-
lated using signals Nearly matches BRC-29, "Inspection 1
WHEEL SENSOR the speedometer
from all four wheel While driving (Note 1) Wheel Sensor System"
sensors display (◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo