Nissan Murano Z50 (2007 year). Manual - part 38

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:

●

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.

●

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.

●

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

NFS000F1

●

Recommended fluid is brake fluid “DOT 3”. Refer to

MA-10, "RECOMMENDED FLUIDS AND LUBRI-

CANTS"

●

Do not reuse drained brake fluid.

●

Be careful not to splash brake fluid on painted areas.

●

To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.

●

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

●

Use a flare nut wrench when removing flare nuts, and use a flare
nut crowfoot and torque wrench when tighten brake tube flare
nuts.

●

Always torque brake lines when installing.

●

Before working, turn ignition switch OFF and disconnect electri-
cal connector of ABS actuator and electric control unit (control
unit) or battery negative terminal.

●

Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage. Refer to

BR-32, "BRAKE BURNISH-

ING PROCEDURE"

WARNING:

Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.

Precautions for Brake Control

NFS000F2

●

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

●

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.

●

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

●

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 brake booster operation, brake fluid
level, and fluid leaks.

●

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.

SBR686C

PRECAUTIONS

BRC-5

[ABS]

BRC

Revision: 2006 July

2007 Murano

●

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.

●

If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

BRC-6

[ABS]

PREPARATION

Revision: 2006 July

2007 Murano

PREPARATION

PFP:00002

Commercial Service Tools

NFS000F3

Tool name

Description

1.Flare nut crowfoot
a:10 mm (0.39 in)/12 mm (0.47 in)
2.Torque wrench

Installing brake tube

S-NT360

SYSTEM DESCRIPTION

BRC-7

[ABS]

BRC

Revision: 2006 July

2007 Murano

SYSTEM DESCRIPTION

PFP:00000

System Diagram

NFS000F4

COMPONENTS FUNCTION DESCRIPTION

Function

NFS000F6

ABS

●

The Anti-Lock Braking 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.

●

If the electrical system malfunctions, then fail-safe function is activated, ABS becomes inoperative, and
ABS warning lamp turns on.

●

Electrical system diagnosis by CONSULT-II is available.

●

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

●

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.

●

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

PFIA0739E

Components

Description

ABS actuator and electric unit (con-
trol unit)

●

Receives the information of various sensor signals and then determines the vehicle driving
status. Performs the calculations of target brake fluid pressure, of brake actuator drive signal
output for the ABS control.

●

Receives the actuator drive signal from ABS actuator and electric unit (control unit), and then
performs the brake fluid adjustment of each wheel caliper.

Decel G sensor (Only AWD models)

Detects the G of the vehicle.

Wheel sensor

Detects the rotation speed of each wheel.

BRC-8

[ABS]

SYSTEM DESCRIPTION

Revision: 2006 July

2007 Murano

EBD

●

Electronic Brake Distribution is a function that detects subtle slippages between front and rear wheels dur-
ing braking, and it improves handling stability by electronically controlling Brake Fluid Pressure which
results in reduced rear wheel slippage.

●

In case of electrical system malfunction, fail-safe function is activated, EBD and ABS becomes inopera-
tive, and ABS warning lamp and brake warning lamp are turned on.

●

Electrical system diagnosis by CONSULT-II is available.

●

During EBD operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

●

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.

●

Stopping distance may be longer than that of vehicles without EBD when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

Hydraulic Circuit Diagram

NFS000F9

PFIA0422E

SYSTEM DESCRIPTION

BRC-9

[ABS]

BRC

Revision: 2006 July

2007 Murano

HYDRAULIC COMPONENTS FUNCTION DESCRIPTION

CAN Communication

NFS000FA

SYSTEM DESCRIPTION

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-49, "CAN Sys-

tem Specification Chart"

Components

Description

Solenoid valve (ABS control valve)

Increases, maintains and decreases the fluid pressure of each caliper according to the signal
from ABS actuator and electric unit (control unit).

Reservoir

When decreasing the caliper pressure, temporarily saves the brake fluid drained form the caliper
in order to perform the work efficiently.

Pump

Refills the brake fluid saved in the reservoir via the damper to the caliper.

Motor

Operates the pump according to the signal from ABS actuator and electric unit (control unit).

Inlet valve

Leaves the brake fluid drained from the reservoir to the pump so as not to return it to the reser-
voir.

Outlet valve

Leaves the brake fluid drained from the pump so as not to return it to the pump.

Return check valve

When releasing the brake, bypasses with the orifice of solenoid valve, and then refills the brake-
fluid of caliper to the master cylinder.

Damper

Controls the pulsation of brake fluid drained from the pump, and then weakens the pedal vibra-
tion during ABS operation.

BRC-10

[ABS]

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

TROUBLE DIAGNOSIS

PFP:00004

Fail-Safe Function

NFS000LL

ABS, EBD SYSTEM

In case of electrical malfunctions with ABS, ABS warning lamp will turn on. In case of electrical malfunctions
with EBD, brake warning lamp and ABS warning lamp will turn on. Simultaneously, ABS become one of follow-
ing conditions of Fail-Safe function.

●

For ABS malfunction, only EBD is activated and condition of vehicle is same condition of vehicles without
ABS system.

NOTE:
ABS self-diagnosis sound may be heard. That is a normal condition because a self-diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

●

For EBD malfunction, EBD and ABS become inoperative, and condition of vehicle is same as condition of
vehicles without ABS, EBD system.

How to Perform Trouble Diagnosis for Quick and Accurate Repair

NFS000FB

INTRODUCTION

●

Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
thoroughly.

●

It is also important to clarify customer complaints before inspec-
tion.
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
customer.

NOTE:
Customers are not professionals. Do not assume “maybe cus-
tomer means...” or “maybe customer mentioned this symptom”.

●

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
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.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

●

After diagnosis, make sure to perform “erase memory”. Refer to

BRC-22, "ERASE MEMORY"

●

For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.

●

Always read “GI General Information” to confirm general precautions. Refer to

GI-4, "General Precau-

tions"

EFJ0028D

SEF233G

TROUBLE DIAGNOSIS

BRC-11

[ABS]

BRC

Revision: 2006 July

2007 Murano

DIAGNOSIS FLOW CHART

SFIA3270E

BRC-12

[ABS]

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

ASKING COMPLAINTS

●

Complaints against malfunction vary depending on each person.
It is important to clarify customer complaints.

●

Ask customer about what symptoms are present and under
what conditions. Use information to reproduce symptom while
driving.

●

It is also important to use the diagnosis sheet so as not to miss
information.

EXAMPLE OF DIAGNOSIS SHEET

SBR339B

SFIA3264E

TROUBLE DIAGNOSIS

BRC-13

[ABS]

BRC

Revision: 2006 July

2007 Murano

Component Installation Location

NFS000FC

PFIA0741E

BRC-14

[ABS]

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

Schematic

NFS000FD

TFWB0121E

TROUBLE DIAGNOSIS

BRC-15

[ABS]

BRC

Revision: 2006 July

2007 Murano

Wiring Diagram — ABS —

NFS000FE

TFWB0117E

BRC-16

[ABS]

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

TFWB0035E

TROUBLE DIAGNOSIS

BRC-17

[ABS]

BRC

Revision: 2006 July

2007 Murano

TFWB0036E

BRC-18

[ABS]

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

TFWA0064E

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