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F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
ABS AND BATTERY INSPECTION ............................ 17 . BRC
ABS WARNING LAMP INSPECTION ................ 17 .
PRECAUTIONS ......................................................... 2
. Warning Lamp and Indicator Timing ...................... 18 .
Precautions for Supplemental Restraint System Control Unit Input/Output Signal Standard ............ 18 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- REFERENCE VALUE FROM CONSULT-II ........ 18 .
SIONER" ................................................................. 2
. CONSULT-II Function (ABS) ................................. 20 .
Precautions for Brake System ................................. 2 . CONSULT-II START PROCEDURE ................... 20 .
Precautions When Using CONSULT-II .................... 2 . H
SELF-DIAGNOSIS ............................................. 20 .
CHECK POINTS FOR USING CONSULT-II ........ 2 . DATA MONITOR ................................................ 22 .
Precautions for Brake Control ................................. 3 . ACTIVE TEST .................................................... 24 .
Precautions for CAN System .................................. 3 . TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC I
PREPARATION .......................................................... 4
. ITEMS ....................................................................... 25
.
Special Service Tools .............................................. 4
. Wheel Sensor System ........................................... 25 .
Commercial Service Tools ....................................... 4 . ABS Control Unit Inspection .................................. 26 . J
SYSTEM DESCRIPTION ........................................... 5 . Solenoid Valve System Inspection ........................ 27 .
System Components ............................................... 5 . Actuator Motor, Motor Relay, and Circuit Inspection 28 ...
ABS Function .......................................................... 5
. ABS Control Unit Power and Ground Systems
EBD Function .......................................................... 5
. K
Inspection .............................................................. 29
.
Fail-Safe Function ................................................... 6
. CAN Communication System Inspection ............... 29 .
ABS/EBD SYSTEM .............................................. 6 . TROUBLE DIAGNOSES FOR SYMPTOMS ........... 30 .
Hydraulic Circuit Diagram ....................................... 6 . ABS Works Frequently .......................................... 30 . L
CAN COMMUNICATION ........................................... 7 . Unexpected Pedal Action ...................................... 31 .
System Description ................................................. 7
. Long Stopping Distance ......................................... 32 .
TROUBLE DIAGNOSIS ............................................. 8 . ABS Does Not Work .............................................. 32 . M
How to Perform Trouble Diagnoses for Quick and Pedal Vibration or ABS Operation Noise ............... 32 .
Accurate Repair ...................................................... 8
. WHEEL SENSORS .................................................. 33 .
INTRODUCTION .................................................. 8 . Removal and Installation ....................................... 33 .
WORK FLOW ....................................................... 9
. REMOVAL .......................................................... 33 .
CLARIFY CONCERN ......................................... 10 . INSTALLATION .................................................. 33 .
EXAMPLE OF DIAGNOSIS SHEET .................. 10 . SENSOR ROTOR .................................................... 35 .
Component Parts and Harness Connector Location ....11 Removal and Installation ....................................... 35 .
Schematic ............................................................. 12
. ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)... 36
Wiring Diagram -- ABS -- .................................... 13 . Removal and Installation ....................................... 36 .
Basic Inspection .................................................... 17
. REMOVAL .......................................................... 36 .
BRAKE FLUID LEVEL, FLUID LEAK, AND INSTALLATION .................................................. 37 .
BRAKE PAD INSPECTION ................................ 17 .
POWER SYSTEM TERMINAL LOOSENESS
Revision: June 2006 BRC-1 2007 Versa
PRECAUTIONS
[ABS]
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EFS006L7
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
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
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:
G 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.
G 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.
G 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.
Precautions for Brake System EFS006L8
CAUTION:
G Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" for recommended brake fluid.
G Never reuse drained brake fluid.
G Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
G To clean or wash all parts of master cylinder and disc brake caliper, use clean brake fluid.
G Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic
system.
G Use flare nut wrench when removing and installing brake
tube.
G If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
G Turn the ignition switch OFF and remove the connector of
the ABS actuator and electric unit (control unit) or the bat-
tery terminal before performing the work.
G Always torque brake lines when installing.
G Burnish the brake contact surfaces after refinishing or SBR686C
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage. Refer to BR-29, "Brake Burnishing Procedure" .
WARNING:
G Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Precautions When Using CONSULT-II EFS006L9
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
G If YES, GO TO 2.
G If NO, GO TO 5.
Revision: June 2006 BRC-2 2007 Versa
PRECAUTIONS
[ABS]
2. Are there any self-diagnostic items, other than those relating to CAN communication system, in the self-
diagnosis results? A
G If YES, GO TO 3.
G If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection. B
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica-
tion. Therefore, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to LAN-44, "TROUBLE DIAGNOSIS" . C
Precautions for Brake Control EFS006LA
G During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is D
normal.
G Just after starting the vehicle, the brake pedal may vibrate or motor operating noises may be heard from
engine compartment. This is normal due to the self check operation. E
G Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
G When an error is indicated by ABS or another warning lamp, collect all necessary information from cus- BRC
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnosis. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid
leaks.
G
G If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
G If there is a radio, antenna or related wiring near the control module, ABS function may have a malfunction H
or error.
G If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.
I
Precautions for CAN System EFS006LB
G Do not apply voltage of 7.0V or higher to terminal to be measured.
G Maximum open terminal voltage of tester in use must be less than 7.0V. J
G Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.
G Area to be repaired must be soldered and wrapped with tape.
K
Make sure that fraying of twisted wire is within 110 mm (4.33 in).
L
M
PKIA0306E
G Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.)
PKIA0307E
Revision: June 2006 BRC-3 2007 Versa
PREPARATION
[ABS]
PREPARATION PFP:00002
Special Service Tools EFS006M7
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
KV991J0080 Checking operation of ABS active wheel sen-
(J-45741) sors
ABS active wheel sensor tester
WFIA0101E
Commercial Service Tools EFS006M8
Tool name Description
1. Flare nut crowfoot Removing and installing brake piping
2. Torque wrench a: 10 mm (0.39 in)/12 mm (0.47 in)
S-NT360
Revision: June 2006 BRC-4 2007 Versa
SYSTEM DESCRIPTION
[ABS]
SYSTEM DESCRIPTION PFP:00000
A
System Components EFS006LC
B
C
D
E
BRC
WFIA0118E
G
ABS Function EFS006LD
G The Anti-Lock Brake System detects wheel revolution while braking and improves handling stability during H
sudden braking by electrically preventing wheel lockup. Maneuverability is also improved for avoiding
obstacles during emergency braking.
G If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and I
the ABS warning lamp turns on.
G The electrical system can be diagnosed using CONSULT-II.
G During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is J
normal.
G Just after starting the vehicle, the brake pedal may vibrate or motor operating noises may be heard from
the engine compartment. This is normal due to the self check operation. K
G Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
L
EBD Function EFS006LE
G Electronic Brake Distribution 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
M
which results in reduced rear wheel slippage.
G If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoper-
ative, and the ABS warning lamp and brake warning lamp are turned on.
G The electrical system can be diagnosed using CONSULT-II.
G During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
G Just after starting the vehicle, the brake pedal may vibrate or motor operating noises may be heard from
the engine compartment. This is normal due to the self check operation.
Revision: June 2006 BRC-5 2007 Versa
SYSTEM DESCRIPTION
[ABS]
Fail-Safe Function EFS006LF
CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS system.
ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp will turn on. In case of an electrical
malfunction with the EBD system, the brake warning lamp and the ABS warning lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS or EBD system.
Hydraulic Circuit Diagram EFS006LG
SFIA3082E
Revision: June 2006 BRC-6 2007 Versa
CAN COMMUNICATION
[ABS]
CAN COMMUNICATION PFP:23710
A
System Description EFS006LH
Refer to LAN-4, "SYSTEM DESCRIPTION" .
B
C
D
E
BRC
G
H
I
J
K
L
M
Revision: June 2006 BRC-7 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
TROUBLE DIAGNOSIS PFP:00000
How to Perform Trouble Diagnoses for Quick and Accurate Repair EFS006LI
INTRODUCTION
The ABS system has an electronic control unit to control major func-
tions. The control unit accepts input signals from sensors and con-
trols actuator operation. It is also important to check for air leaks in
the booster or brake and vacuum lines, lack of brake fluid, or other
malfunctions in the brake system.
It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent conditions are
caused by poor electrical connections or damaged wiring. In this
case, careful checking of suspicious circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the malfunction, so a
SEF233G
road test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with an ABS complaint. The customer
is a very good source of information, especially for intermittent condi-
tions. Through the talks with the customer, find out what symptoms
are present and under what conditions they occur.
Start your diagnosis by looking for "conventional" malfunctions first.
This is one of the best ways to troubleshoot brake malfunctions on
an ABS equipped vehicle. Also check related Service Bulletins for
information.
SEF234G
Revision: June 2006 BRC-8 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
WORK FLOW
A
B
C
D
E
BRC
G
H
I
J
K
L
M
WFIA0496E
Revision: June 2006 BRC-9 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
CLARIFY CONCERN
G A customer's description of a vehicle concern may vary depend-
ing on the individual. It is important to clarify the customer's con-
cern.
G Ask the customer about what symptoms are present under what
conditions. Use this information to reproduce the symptom while
driving.
G It is also important to use the diagnosis sheet to understand
what type of symptoms the customer is experiencing.
SBR339B
EXAMPLE OF DIAGNOSIS SHEET
SFIA3264E
Revision: June 2006 BRC-10 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
Component Parts and Harness Connector Location EFS006LJ
A
B
C
D
E
BRC
G
H
I
J
K
L
M
WFIA0497E
1. Front wheel sensor 2. Rear wheel sensor 3. ABS actuator and electric unit (con-
LH E51 LH B123 trol unit) E33
RH E52 RH B124
4. Combination meter M24
Revision: June 2006 BRC-11 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
Schematic EFS006LK
WFWA0418E
Revision: June 2006 BRC-12 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
Wiring Diagram -- ABS -- EFS006LL
A
B
C
D
E
BRC
G
H
I
J
K
L
M
WFWA0419E
Revision: June 2006 BRC-13 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
WFWA0420E
Revision: June 2006 BRC-14 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
G
H
I
J
K
L
M
WFWA0421E
Revision: June 2006 BRC-15 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
WFWA0422E
Revision: June 2006 BRC-16 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
Basic Inspection EFS006LM
BRAKE FLUID LEVEL, FLUID LEAK, AND BRAKE PAD INSPECTION A
1. Check fluid level in the brake fluid reservoir. If fluid level is low, add fluid.
2. Check the brake piping and around the ABS actuator and electric unit (control unit) for leaks. If there is
leaking or seeping fluid, check the following items. B
G If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and recheck for leaks.
G If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) threads, C
replace the damaged part and recheck for leaks.
G When there is fluid leaking or seeping from a fluid connection, use a clean cloth to wipe off the fluid and
recheck for leaks. If fluid is still seeping out, replace the damaged part. If the fluid is leaking at the ABS D
actuator and electric unit (control unit), replace the ABS actuator and electric unit (control unit) assem-
bly.
CAUTION: E
The ABS actuator and electric unit (control unit) cannot be disassembled and must be replaced
as an assembly.
3. Check the brake pads for excessive wear. BRC
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, make
sure the battery is sufficiently charged. G
ABS WARNING LAMP INSPECTION
1. Make sure ABS warning lamp turns on for approximately 2 seconds when the ignition switch is turned ON.
If it does not, check CAN communications. If there are no errors with the CAN communication system, H
replace the combination meter. Refer to IP-19, "COMBINATION METER" .
2. Make sure the lamp turns off approximately 2 seconds after the ignition switch is turned ON. If the lamp
does not turn off, conduct self-diagnosis of ABS actuator and electric unit (control unit). If no malfunctions I
are detected in self-diagnosis, replace combination meter. Refer to IP-19, "COMBINATION METER" .
3. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-20, "CONSULT-II
Function (ABS)" . J
K
L
M
Revision: June 2006 BRC-17 2007 Versa
TROUBLE DIAGNOSIS
[ABS]
Warning Lamp and Indicator Timing EFS006LN
BRAKE
ABS
Condition warning lamp Remarks
warning lamp
[Note 1]
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