Nissan Murano Z50 (2004 year). Manual - part 43

ON-VEHICLE SERVICE

BRC-49

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

Calibration of Decel G Sensor

AFS001Z7

After removing/installing or replacing Yaw rate/side/decel G sensor, ABS actuator and electric unit (control
unit) make sure to Calibration of Decel G Sensor before running vehicle.

×

: Required

–: Not required

CAUTION:

To calibrate decel G sensor, make sure to use CONSULT- II (Adjustment cannot be done without CON-
SULT- II)

1.

Stop vehicle with front wheels in straight-ahead position.

CAUTION:

●

Keep all tires inflated to correct pressures. Adjust the tire
pressure to the specified pressure value.

●

See that there is on-load in vehicle other than the driver
(or equivalent weight placed in drivers position).

2.

Connect CONSULT- II to data link connector on vehicle, and
turn ignition switch ON (do not start engine).

3.

Touch “ABS”, “WORK SUPPORT” and “DECEL G SEN CALI-
BRATION” on CONSULT- II screen in this order.

4.

Touch “START”.

5.

After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)

6.

Turn ignition switch OFF, then turn it ON again.

CAUTION:

Be sure to carry out above operation.

7.

Run vehicle with front wheels in straight-ahead position, then
stop.

8.

Select “DATA MONITOR”, “SELECTION FROM MENU”, and
“DECEL G SEN” on CONSULT- II screen. Then check that
“DECEL G SEN” is within 

±

0.08G. If value is more than specifi-

cation, repeat steps 1 to 5.

9.

Erase memory of ABS actuator and electric unit (control unit) and ECM.

10. Turn ignition switch OFF.

Situation

Calibration of Decel G Sensor

Removing/Installing ABS actuator and electric unit (control unit)

×

Removing/Installing steering components

–

Removing/Installing suspension components

–

Change tires to new ones

–

Tire rotation

–

Adjusting wheel alignment

–

Removing/Installing Yaw rate/side/decel G sensor

×

PBIB1300E

LFIA0171E

BRC-50

[VDC/TCS/ABS]

SYSTEM DESCRIPTION

Revision: 2004 November

2004 Murano

SYSTEM DESCRIPTION

PFP:00000

System Diagram

AFS00210

PFIA0463E

SYSTEM DESCRIPTION

BRC-51

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

System Component Parts

AFS001AR

VDC Function

AFS001AT

●

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under
steering / over steering) is determined from information from the yaw rate /side/decel G sensor, wheel
sensor, etc., and this information is used to improve vehicle stability by controlling the braking and engine
power to all four wheels.

●

The SLIP indicator lamp flashes to inform the driver of VDC operation.

●

During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard.
This is normal.

●

The ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle
is subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while
the engine is running or steep slope such as bank. In this case, restart the engine on a normal road, and if
the ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no problem.

1. 

Sensor rotor (FR)

2.

Wheel sensor (FR)

3. 

Wheel sensor (FL)

4.

Sensor rotor (FL)

5.

Brake booster and Master cylinder

6.

ABS actuator and electric unit (con-
trol unit)

7.

Sensor rotor (RR)

8.

Wheel sensor (RR)

9.

Wheel sensor (RL)

10. Sensor rotor (RL)

11.

Combination meter
[Brake warning lamp,
ABS warning lamp,
VDC OFF indicator lamp,
SLIP indictor lamp]

12. VDC OFF Switch

13. Yaw rate/side/decel G sensor

14. Steering Angle sensor

PFIA0419E

BRC-52

[VDC/TCS/ABS]

SYSTEM DESCRIPTION

Revision: 2004 November

2004 Murano

TCS Function

AFS001AU

●

The wheel spin of the drive wheels is detected by the ABS actuator and electric unit (control unit) from the
wheel speed signals from the four wheels, so if wheel spin occurs, the drive wheel right and left brake fluid
pressure control and engine fuel cut are conducted while the throttle value is restricted to reduce the
engine torque and decrease the amount of wheel spin. In addition, the degree the throttle is opened is
controlled to achieve the optimum engine torque.

●

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

●

TCS may be activated any time the vehicle suddenly accelerates, depressing accelerator peal fully, sud-
denly downshifts, upshifts, or is driven on a road with a varying surface friction coefficient.

●

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.

ABS Function

AFS001ZQ

●

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.

●

 If the electrical system breaks down, 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.

EBD Function

AFS001ZR

●

Electronic Brake Distributor 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 break down, 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.

Fail-Safe Function

AFS0020Z

VDC/TCS SYSTEM

In case of Throttle Control System trouble, the VDC OFF indicator lamp and SLIP indicator lamp are turned
on, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS system. In case
of trouble to the Throttle Control System, the ABS control continues to operate normally without VDC/TCS
control.

CAUTION:

If the Fail-Safe function is activated, then perform the Self Diagnosis for VDC/TCS/ABS control sys-
tem.

ABS, EBD SYSTEM

In case of electrical problems with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP indica-
tor lamp will turn on. In case of electrical problem with the EBD, Brake warning lamp, ABS warning lamp, VDC
OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/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 TCS/ABS system.

SYSTEM DESCRIPTION

BRC-53

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

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 VDC/TCS/ABS, EBD system.

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.

Hydraulic Circuit Diagram

AFS00211

PFIA0452E

BRC-54

[VDC/TCS/ABS]

CAN COMMUNICATION

Revision: 2004 November

2004 Murano

CAN COMMUNICATION

PFP:23710

System Description

AFS0028H

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-8, "CAN Com-

munication Unit"

 . 

TROUBLE DIAGNOSIS

BRC-55

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

TROUBLE DIAGNOSIS

PFP:00004

How to Perform Trouble Diagnosis for Quick and Accurate Repair

AFS001ZW

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 carry out “erase memory”. Refer to

BRC-71, "Operation Procedure"

 .

●

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

BRC-56

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

DIAGNOSIS FLOWCHART

PFIA0464E

TROUBLE DIAGNOSIS

BRC-57

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 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

LFIA0176E

BRC-58

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

Component Installation Location

AFS001ZX

PFIA0430E

TROUBLE DIAGNOSIS

BRC-59

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

Schematic

AFS001ZY

TFWA0065E

BRC-60

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

Wiring Diagram — VDC —

AFS001ZZ

TFWA0101E

TROUBLE DIAGNOSIS

BRC-61

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

TFWA0067E

BRC-62

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

TFWA0102E

TROUBLE DIAGNOSIS

BRC-63

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

Revision: 2004 November

2004 Murano

TFWA0069E

BRC-64

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

TFWA0070E