Nissan Murano Z50 (2005 year). Manual — part 52
SYSTEM DESCRIPTION
BRC-51
[VDC/TCS/ABS]
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Revision: 2005 August
2005 Murano
SYSTEM DESCRIPTION
PFP:00000
System Diagram
AFS00210
PFIA0463E
BRC-52
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2005 August
2005 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 malfunction.
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
SYSTEM DESCRIPTION
BRC-53
[VDC/TCS/ABS]
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Revision: 2005 August
2005 Murano
TCS Function
AFS001AU
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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
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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 malfunction, 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 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.
Fail-Safe Function
AFS0020Z
VDC/TCS SYSTEM
In case of malfunction with TCS, 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 malfunc-
tion with TCS, 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 malfunction with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP indi-
cator lamp will turn on. In case of electrical malfunction 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 malfunction, only the EBD is activated and the condition of the vehicle is the same condition of
vehicles without TCS/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 VDC/TCS/ABS, EBD system.
BRC-54
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2005 August
2005 Murano
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
CAN COMMUNICATION
BRC-55
[VDC/TCS/ABS]
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Revision: 2005 August
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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
BRC-56
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 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 perform “erase memory”. Refer to
●
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
EFJ0028D
SEF233G
TROUBLE DIAGNOSIS
BRC-57
[VDC/TCS/ABS]
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Revision: 2005 August
2005 Murano
DIAGNOSIS FLOWCHART
PFIA0464E
BRC-58
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 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
TROUBLE DIAGNOSIS
BRC-59
[VDC/TCS/ABS]
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Revision: 2005 August
2005 Murano
Component Installation Location
AFS001ZX
PFIA0430E
BRC-60
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
Schematic
AFS001ZY
TFWB0054E
TROUBLE DIAGNOSIS
BRC-61
[VDC/TCS/ABS]
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BRC
Revision: 2005 August
2005 Murano
Wiring Diagram — VDC —
AFS001ZZ
TFWB0037E
BRC-62
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
TFWB0038E
TROUBLE DIAGNOSIS
BRC-63
[VDC/TCS/ABS]
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BRC
Revision: 2005 August
2005 Murano
TFWB0039E
BRC-64
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
TFWA0069E
TROUBLE DIAGNOSIS
BRC-65
[VDC/TCS/ABS]
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BRC
Revision: 2005 August
2005 Murano
TFWB0040E
BRC-66
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2005 August
2005 Murano
TFWA0071E
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