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TRANSFER

D DRIVELINE/AXLE

B
SECTION
TRANSFER C

E
CONTENTS
PRECAUTIONS ......................................................... 3. Trouble Diagnosis Chart for Symptoms ................. 22 . F
Precautions for Supplemental Restraint System AWD Control Unit Input/Output Signal Reference
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Values .................................................................... 23
.
SIONER" ................................................................. 3
. AWD CONTROL UNIT INSPECTION TABLE .... 23 . G
Precautions Necessary for Steering Wheel Rotation CONSULT-II Function (ALL MODE AWD/4WD) .... 24 .
After Battery Disconnect ......................................... 3 . FUNCTION ......................................................... 24 .
OPERATION PROCEDURE ................................ 3 . CONSULT-II SETTING PROCEDURE ............... 24 .
H
Precautions ............................................................. 4
. SELF-DIAG RESULT MODE .............................. 24 .
Service Notice ......................................................... 4
. DATA MONITOR MODE ..................................... 26 .
PREPARATION .......................................................... 6
. ACTIVE TEST MODE ........................................ 27 .
Special Service Tools .............................................. 6. AWD CONTROL UNIT PART NUMBER ............ 27 . I
Commercial Service Tools ....................................... 8 . TROUBLE DIAGNOSIS FOR SYSTEM ................... 28 .
NOISE, VIBRATION AND HARSHNESS (NVH) Power Supply Circuit for AWD Control Unit ........... 28 .
TROUBLESHOOTING ............................................... 9 . CONSULT-II REFERENCE VALUE IN DATA J
NVH Troubleshooting Chart .................................... 9 . MONITOR MODE ............................................... 28 .
TRANSFER OIL ....................................................... 10. DIAGNOSTIC PROCEDURE ............................. 28 .
Replacement ......................................................... 10
. AWD Control Unit .................................................. 29 .
K
DRAINING .......................................................... 10
. DIAGNOSTIC PROCEDURE ............................. 29 .
FILLING .............................................................. 10
. ABS System .......................................................... 29.
Inspection .............................................................. 10
. DIAGNOSTIC PROCEDURE ............................. 29 .
OIL LEAKAGE AND OIL LEVEL ........................ 10 . AWD Solenoid ....................................................... 30 . L
AWD SYSTEM ..........................................................11. CONSULT-II REFERENCE VALUE IN DATA
Power Transfer Diagram ........................................11 . MONITOR MODE ............................................... 30 .
System Description ................................................11 . DIAGNOSTIC PROCEDURE ............................. 31 . M
ELECTRIC CONTROLLED COUPLING .............11 . COMPONENT INSPECTION ............................. 32 .
AWD CONTROL UNIT ........................................11 . AWD Actuator Relay .............................................. 33 .
AWD LOCK SWITCH ......................................... 12 . CONSULT-II REFERENCE VALUE IN DATA
AWD LOCK INDICATOR LAMP ......................... 12 . MONITOR MODE ............................................... 33 .
AWD WARNING LAMP ...................................... 12 . DIAGNOSTIC PROCEDURE ............................. 33 .
System Diagram .................................................... 13. AWD Lock Switch .................................................. 34 .
COMPONENTS FUNCTION DESCRIPTION .... 14 . CONSULT-II REFERENCE VALUE IN DATA
CAN Communication ............................................. 14 . MONITOR MODE ............................................... 34 .
SYSTEM DESCRIPTION ................................... 14 . DIAGNOSTIC PROCEDURE ............................. 34 .
TROUBLE DIAGNOSIS ........................................... 15 . COMPONENT INSPECTION ............................. 36 .
Fail-Safe Function ................................................. 15
. Engine Control Signal ............................................ 36 .
How to Perform Trouble Diagnosis ....................... 15 . DIAGNOSTIC PROCEDURE ............................. 36 .
BASIC CONCEPT .............................................. 15 . CAN Communication Line ..................................... 36 .
Location of Electrical Parts .................................... 16 . DIAGNOSTIC PROCEDURE ............................. 36 .
Circuit Diagram ..................................................... 17
. TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 38 .
Wiring Diagram -- AWD -- ................................... 18 . AWD LOCK Indicator Lamp Does Not Turn ON for

Revision: 2006 July TF-1 2007 Murano
Approx. 1 Second When The Ignition Switch Is SIDE OIL SEAL ........................................................50
.
Turned to ON ......................................................... 38
. Removal and Installation ........................................50.
DIAGNOSTIC PROCEDURE ............................. 38 . REMOVAL ...........................................................50
.
AWD Warning Lamp Does Not Turn ON When The INSTALLATION ...................................................50
.
Ignition Switch Is Turned to ON ............................. 40 . AIR BREATHER HOSE ............................................51 .
DIAGNOSTIC PROCEDURE ............................. 40 . Components ...........................................................51
.
AWD Warning Lamp Does Not Turn OFF Several Removal and Installation ........................................51.
Seconds after Engine Started ................................ 41 . TRANSFER ASSEMBLY ..........................................52 .
DIAGNOSTIC PROCEDURE ............................. 41 . Removal and Installation ........................................52.
AWD Mode Cannot Be Switched after Engine Is COMPONENTS ..................................................52 .
Started ................................................................... 43
. REMOVAL ...........................................................52
.
DIAGNOSTIC PROCEDURE ............................. 43 . INSTALLATION ...................................................52
.
Heavy Tight-Corner Braking Symptom Occurs Disassembly and Assembly ...................................54 .
When The Vehicle Is Driven in AUTO Mode and The COMPONENTS ..................................................54 .
Steering Wheel Is Turned Fully to Either Side after ASSEMBLY INSPECTION ..................................55 .
The Engine Is Started ............................................ 45 . DISASSEMBLY ...................................................59.
DIAGNOSTIC PROCEDURE ............................. 45 . INSPECTION AFTER DISASSEMBLY ...............63 .
Vehicle Does Not Enter AWD Mode Even Though SELECTING ADJUSTING SHIMS ......................64 .
AWD Warning Lamp Turned to OFF ...................... 46 . ASSEMBLY .........................................................65
.
DIAGNOSTIC PROCEDURE ............................. 46 . SERVICE DATA AND SPECIFICATIONS (SDS) .....71 .
While Driving, AWD Warning Lamp Flashes Rapidly General Specifications ...........................................71
.
(When Flashing in Approx. 1 Minute and Then Turn- Inspection and Adjustment .....................................71 .
ing OFF) ................................................................ 47
. PRELOAD TORQUE BEFORE DISASSEMBLY...71
While Driving, AWD Warning Lamp Flashes Slowly PRELOAD TORQUE AFTER DISASSEMBLY
(When Continuing to Flash until Turning Ignition AND REASSEMBLY ...........................................71 .
Switch OFF) ........................................................... 47
. BACKLASH .........................................................71
.
DIAGNOSTIC PROCEDURE ............................. 47 . COMPANION FLANGE RUNOUT ......................71 .
AWD CONTROL UNIT ............................................. 49 . SELECTIVE PARTS ...........................................71 .
Removal and Installation ....................................... 49 .
REMOVAL .......................................................... 49 .
INSTALLATION ................................................... 49 .

Revision: 2006 July TF-2 2007 Murano
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" NDS0006U

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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 C
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: TF
q 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. E
q 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. F
q 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.
G
Precautions Necessary for Steering Wheel Rotation After Battery Disconnect
NDS0006V

NOTE: H
q This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI
VEHICLE IMMOBILIZER SYSTEM - NATS).
q Remove and install all control units after disconnecting both battery cables with the ignition knob in the I
LOCK position.
q Always use CONSULT-II to perform self-diagnosis as a part of each function inspection after finishing
work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
J
For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock
mechanism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible. K
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE L
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged. M
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ACC position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the LOCK position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-II.

Revision: 2006 July TF-3 2007 Murano
PRECAUTIONS

Precautions NDS0006W

q Before connecting or disconnecting the AWD control unit
harness connector, turn ignition switch "OFF" and discon-
nect battery ground cable. Because battery voltage is
applied to AWD control unit even if ignition switch is turned
"OFF".

SEF289H

q When connecting or disconnecting pin connectors into or
from AWD control unit, take care not to damage pin termi-
nals (bend or break).
When connecting pin connectors, make sure that there are
no bends or breaks on AWD control unit pin terminal.

SEF291H

q Before replacing AWD control unit, perform AWD control
unit input/output signal inspection and make sure whether
AWD control unit functions properly or not. Refer to TF-23,
"AWD Control Unit Input/Output Signal Reference Values" .

SDIA1848E

Service Notice NDS0006X

q After overhaul refill the transfer with new transfer oil.
q Check the oil level or replace the oil only with the vehicle parked on level surface.
q During removal or installation, keep inside of transfer clear of dust or dirt.
q Replace all tires at the same time. Always use tires of the proper size and the same brand and pattern.
Fitting improper size and unusual wear tires applies excessive force to vehicle mechanism and can cause
longitudinal vibration.
q Disassembly should be done in a clean work area.
q Before proceeding with disassembly, thoroughly clean the transfer. It is important to prevent the internal
parts from becoming contaminated by dirt or other foreign matter.
q Check for the correct installation status prior to removal or disassembly. If matching marks are required,
be certain they do not interfere with the function of the parts when applied.
q All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
q Check appearance of the disassembled parts for damage, deformation, and unusual wear. Replace them
with a new ones if necessary.
q Gaskets, seals, O-rings and lock nuts should be replaced any time when the transfer is disassembled.
q In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to outside. If
tightening sequence is specified, use it.

Revision: 2006 July TF-4 2007 Murano
PRECAUTIONS

q Observe the specified torque when assembling.
q Clean and flush the parts sufficiently and blow-dry them. A
q Be careful not to damage sliding surfaces and mating surfaces.
q Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transfer. B

Revision: 2006 July TF-5 2007 Murano
PREPARATION

PREPARATION PFP:00002

Special Service Tools NDS0006Z

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.) Description
Tool name

KV38101700 Installing side oil seal (installing adapter case
( -- ) oil seal)
Drift
a: 82 mm (3.23 in) dia.
b: 78 mm (3.07 in) dia.

ZZA1149D

ST3127S000 Measuring preload torque
(J-25765-A)
Preload gauge

ZZA0503D

ST33220000 Removing drive pinion
(J-25804-01)
Drift
a: 37 mm (1.46 in) dia.
b: 31 mm (1.22 in) dia.
c: 22 mm (0.87 in) dia.

ZZA1046D

KV381054S0 q Removing pinion rear bearing outer race
(J-34286) q Removing pinion front bearing outer race
Puller
q Removing gear ring oil seal

ZZA0601D

ST30031000 Removing pinion front bearing inner race
(J-22912-01)
Replacer

ZZA0700D

ST33200000 q Removing gear ring bearing inner race
(J-26082) (adapter case side)
Drift q Installing companion flange
a: 60 mm (2.36 in) dia.
b: 44.5 mm (1.752 in) dia.

ZZA1002D

ST33061000 Removing gear ring bearing inner race
(J-8107-2) (transfer case side)
Drift
a: 38 mm (1.50 in) dia.
b: 28.5 mm (1.122 in) dia.

ZZA0810D

Revision: 2006 July TF-6 2007 Murano
PREPARATION

Tool number
(Kent-Moore No.) Description A
Tool name

ST30720000 q Installing gear ring bearing outer race
(J-25405) (transfer case side) B
Drift q Installing gear ring bearing inner race
a: 77 mm (3.03 in) dia.
(transfer case side)
b: 55.5 mm (2.185 in) dia.
q Installing gear ring bearing inner race C
(adapter case side)
q Installing gear ring bearing outer race
ZZA0811D (adapter case side) TF
q Installing transfer case oil seal
KV40101840 Installing gear ring bearing outer race
( -- ) (transfer case side) E
Drift
a: 77 mm (3.03 in) dia.
b: 85 mm (3.35 in) dia.
F
ZZA0881D

ST33230000 Installing gear ring oil seal G
(J-25805-01)
Drift
a: 51 mm (2.01 in) dia.
b: 41 mm (1.61 in) dia. H
c: 28.5 mm (1.122 in) dia.

ZZA1046D

ST27863000 Installing gear ring bearing inner race
I
( -- ) (transfer case side)
Drift
a: 74.5 mm (2.933 in) dia. J
b: 62.5 mm (2.461 in) dia.

ZZA1003D K
KV40101630 Installing gear ring bearing inner race
(J-35870) (transfer case side)
Drift L
a: 68 mm (2.68 in) dia.
b: 60 mm (2.36 in) dia.

M
ZZA1003D

KV38102510 Installing gear ring bearing inner race
( -- ) (adapter case side)
Drift
a: 71 mm (2.80 in) dia.
b: 65 mm (2.56 in) dia.

ZZA1003D

KV40105230 Installing gear ring bearing outer race
( -- ) (adapter case side)
Drift
a: 92 mm (3.62 in) dia.
b: 86 mm (3.39 in) dia.

ZZA1141D

Revision: 2006 July TF-7 2007 Murano
PREPARATION

Tool number
(Kent-Moore No.) Description
Tool name

KV38100300 Installing pinion rear bearing outer race
(J-25523)
Drift
a: 54 mm (2.13 in) dia.
b: 46 mm (1.81 in) dia.
c: 32 mm (1.26 in) dia.

ZZA1046D

ST33400001 q Installing pinion front bearing outer race
(J-26082) q Installing pinion sleeve oil seal
Drift
a: 60 mm (2.36 in) dia.
b: 47 mm (1.85 in) dia.

ZZA0814D

ST30901000 q Installing pinion front bearing outer race
(J-26010-01) q Installing pinion front bearing inner race
Drift
a: 79 mm (3.11 in) dia.
b: 45 mm (1.77 in) dia.
c: 35.2 mm (1.386 in) dia.

ZZA0978D

Commercial Service Tools NDS00070

Tool name Description

Power tool Loosening nuts and bolts

PBIC0190E

Revision: 2006 July TF-8 2007 Murano
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING PFP:00003
A
NVH Troubleshooting Chart NDS00071

Use the chart below to help you find the cause of the symptom. The numbers indicate the order of the inspec-
tion. If necessary, repair or replace these parts. B

TF-54

TF-63

TF-63
TF-10
Reference page

TRANSFER OIL (Level too high)

BEARING (Worn or damaged)
OIL SEAL (Worn or damaged)
LIQUID GASKET (Damaged)

O-RING (Worn or damaged)
TRANSFER OIL (Level low)

GEAR (Worn or damaged)
TRANSFER OIL (Wrong)
TF
SUSPECTED PARTS
(Possible cause)
E

F
Noise 1 2 3 3
Symptom
Transfer oil leakage 3 1 2 2 2
G

Revision: 2006 July TF-9 2007 Murano
TRANSFER OIL

TRANSFER OIL PFP:KLD30

Replacement NDS00072

DRAINING
CAUTION:
When draining oil, protect exhaust tube flange with cover.
1. Run the vehicle to warm up the transfer body sufficiently.
2. Stop the engine, and remove the drain plug to drain the transfer
oil.
3. Apply sealant to drain plug. Install drain plug on transfer and
tighten to the specified torque. Refer to TF-54, "COMPO-
NENTS" .
q Use Genuine Silicone RTV or equivalent. Refer to GI-46,
"Recommended Chemical Products and Sealants" .

SDIA1507E

FILLING
1. Remove filler plug and add gear oil until oil level reaches the
specified limit near filler plug mounting hole.
Oil capacity : Approx. 0.31 (5/8 US pt, 1/2 lmp pt)
CAUTION:
Carefully fill the oil. (Fill up for approx. 3 minutes)
2. Leave the vehicle for 3 minutes, and check the oil level again.
3. Apply sealant to filler plug. Install filler plug to transfer and
tighten to the specified torque. Refer to TF-54, "COMPO-
NENTS" .
q Use Genuine Silicone RTV or equivalent. Refer to GI-46,
SDIA1508E

"Recommended Chemical Products and Sealants" .
Inspection NDS00073

OIL LEAKAGE AND OIL LEVEL
1. Check oil level from filler plug mounting hole as shown in the fig-
ure.
CAUTION:
Do not start engine while checking oil level.
2. Before installing filler plug, apply sealant. Install filler plug on
transfer and tighten to the specified torque. Refer to TF-54,
"COMPONENTS" .
q Use Genuine Silicone RTV or equivalent. Refer to GI-46,
"Recommended Chemical Products and Sealants" .
SDIA1508E

Revision: 2006 July TF-10 2007 Murano
AWD SYSTEM

AWD SYSTEM PFP:41650
A
Power Transfer Diagram NDS00074

SDIA1607E

E
System Description NDS00075

ELECTRIC CONTROLLED COUPLING
Operation Principle
1. AWD control unit supplies command current to electric con- F
trolled coupling (AWD solenoid).
2. Control clutch is engaged by electromagnet and torque is
detected in control clutch. G
3. The cam operates in response to control clutch torque and
applies pressure to main clutch.
4. Main clutch transmits torque to front wheels according to press- H
ing power.

I
SDIA2035E

q Transmission torque to rear wheels is determined according
J
to command current.

SDIA1844E
M
AWD CONTROL UNIT
q AWD control unit controls distribution of drive power between
front-wheel drive (100:0) and AWD (50:50) conditions according
to signals from the sensors.
q Self-diagnosis results can be read with CONSULT-II.

SDIA2341E

Revision: 2006 July TF-11 2007 Murano
AWD SYSTEM

AWD LOCK SWITCH
AUTO Mode
q Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
q AUTO mode makes stable driving possible, with no wheel spin, on snowy roads or other slippery sur-
faces.
q On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close
to front-wheel drive.
q Sensor inputs determine the vehicle's turning condition, and tight cornering/braking are controlled by dis-
tributing optimum torque to the rear wheels.
LOCK Mode
q Front/rear wheel torque distribution is fixed, ensuring stable driving when climbing slopes.
q Vehicle will switch automatically to AUTO mode if vehicle speed increases. If vehicle speed then
decreases, the vehicle automatically returns to direct 4-wheel driving conditions.The AWD LOCK indicator
lamp keeps illuminating.
q LOCK mode will change to AUTO mode automatically, when the vehicle speed exceeds approx. 10 km/h
(6 MPH) for a long time. The AWD LOCK indicator lamp turns off.
q When the vehicle speed exceeds approx. 10 km/h (6 MPH), AUTO mode cannot be shifted to LOCK
mode. In contrast, LOCK mode can be shifted to AUTO mode.
q LOCK mode will change to AUTO mode automatically, when the ignition switch is turned "OFF".
NOTE:
q Every time AWD LOCK switch is pressed, AUTO mode and LOCK mode switch each other.
q When driving in AUTO mode or LOCK mode, if there is a large difference between front and rear wheel
speed which continues for a long time, oil temperature of drive system parts becomes too high and AWD
warning lamp flashes rapidly. (When AWD warning lamp flashes, vehicle changes to front-wheel drive
conditions.)
q If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop
and AUTO mode will be restored.
q When driving in AUTO mode, AWD warning lamp may flash slowly if there is a significant difference in
diameter of the tires. At this time, vehicle performance is not fully available and cautious driving is
required. (Continues until engine is turned OFF.)
q If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.
q If there is a difference of revolution speed between the front and rear wheel with AUTO mode the shift
occasionally changes to LOCK mode automatically. This is not malfunction.
q If there is a significant difference in pressure or wear between tires, full vehicle performance is not avail-
able. Tire conditions are detected, and LOCK mode may be prohibited, or else speeds at which LOCK
mode is enabled may be restricted.
AWD LOCK INDICATOR LAMP
The following is the indications of indicator lamp.
Condition AWD LOCK indicator lamp
AUTO mode OFF
LOCK mode ON
Lamp check Turns ON for approx. 1 second when ignition switch is turned ON.

SDIA2330E

AWD WARNING LAMP
Turns ON when there is a malfunction in AWD system. It indicates that fail-safe mode is engaged and vehicle
change to front-wheel drive or shifting driving force-AWD (Rear-wheels still have some driving torque).
Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately in 1
seconds after the engine starts if system is normal.

Revision: 2006 July TF-12 2007 Murano
AWD SYSTEM

AWD Warning Lamp Indication
Condition AWD warning lamp
A

Turns ON when ignition switch is turned ON. Turns OFF
Lamp check
approx. 1 seconds after engine start.
B
AWD system malfunction ON
Protection function is activated due to heavy load to electric con-
Rapid flashing: 2 times/second
trolled coupling. (AWD system is not malfunctioning and AWD system
(Flashing in approx. 1 minute and then turning OFF.) C
changes to 2WD mode.)
Slow flashing: 1 time/2 seconds
Large difference in diameter of front/rear tires
(Continuing to flash until turning ignition switch OFF)
Other than above (system normal) OFF
TF

System Diagram NDS00076

SDIA2329E

Revision: 2006 July TF-13 2007 Murano
AWD SYSTEM

COMPONENTS FUNCTION DESCRIPTION
Component parts Function
q Controls driving force distribution by signals from each sensor and switch from front wheel driving
AWD control unit mode (100:0) to AWD mode (50:50).
q 2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to rear final drive.
AWD lock switch Able to select AUTO or LOCK mode.
q Illuminates if malfunction is detected in electrical system of AWD system.
AWD warning lamp q There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
q There are 2 blinks in 1 second if load is still applied to driving parts.
AWD LOCK indicator lamp Illuminates in LOCK mode (direct AWD mode) and does not illuminate in AUTO mode.
Transmits the following signals via CAN communication to AWD control unit.
ABS actuator and electric unit
q Vehicle speed signal
(control unit)
q Stop lamp switch signal (brake signal)
Transmits the following signals via CAN communication to AWD control unit.
ECM q Accelerator pedal position signal
q Engine speed signal
Transmits conditions of AWD lock switch and parking brake switch via CAN communication to AWD
Unified meter and A/C amp.
control unit.

CAN Communication NDS00077

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.
For details, refer to LAN-49, "CAN System Specification Chart" .

Revision: 2006 July TF-14 2007 Murano
TROUBLE DIAGNOSIS

TROUBLE DIAGNOSIS PFP:00004
A
Fail-Safe Function NDS00078

q If any malfunction occurs in AWD electrical system, and control unit detects the malfunction, AWD warn-
ing lamp on combination meter turns ON to indicate system malfunction. B
q When AWD warning lamp is ON, vehicle changes to front-wheel drive or shifting driving force-AWD (Rear-
wheels still have some driving torque).
How to Perform Trouble Diagnosis NDS00079
C
BASIC CONCEPT
q To perform trouble diagnosis, it is the most important to have understanding about vehicle systems (con-
trol and mechanism) thoroughly. TF
q It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptoms, and understand them fully. E
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptoms by driving vehicle with
customer.
F
CAUTION:
Customers are not professional. It is dangerous to make an
easy guess like "maybe the customer means that...," or
"maybe the customer mentions this symptom". G
SEF233G

H
q It is essential to check symptoms right from the beginning in
order to repair malfunctions completely.
For intermittent malfunctions, reproduce symptoms based on
interview with customer and past examples. Do not perform I
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 repairing with- J
out any symptom diagnosis, you cannot judge if malfunctions
have actually been eliminated.
q After completing diagnosis, always erase diagnostic memory.
Refer to TF-25, "How to Erase Self-diagnostic Results" . K
SEF234G

q For intermittent malfunctions, move harness or harness connec-
tor by hand. Then check for poor contact or reproduced open circuit.
L

Revision: 2006 July TF-15 2007 Murano
TROUBLE DIAGNOSIS

Location of Electrical Parts NDS0007A

SDIA3016E

Revision: 2006 July TF-16 2007 Murano
TROUBLE DIAGNOSIS

Circuit Diagram NDS0007B

TDWB0013E

Revision: 2006 July TF-17 2007 Murano
TROUBLE DIAGNOSIS

Wiring Diagram -- AWD -- NDS0007C

TDWB0014E

Revision: 2006 July TF-18 2007 Murano
TROUBLE DIAGNOSIS

TDWB0015E

Revision: 2006 July TF-19 2007 Murano
TROUBLE DIAGNOSIS

TDWB0016E

Revision: 2006 July TF-20 2007 Murano
TROUBLE DIAGNOSIS

TDWB0017E

Revision: 2006 July TF-21 2007 Murano
TROUBLE DIAGNOSIS

Trouble Diagnosis Chart for Symptoms NDS0007D

If AWD warning lamp turns ON, perform self-diagnosis. Refer to TF-24, "SELF-DIAG RESULT MODE" .
Symptom Condition Check item Reference page
CAN communication line
AWD LOCK indicator lamp does not turn Power supply and ground for AWD con-
ON for approx. 1 second when the ignition trol unit
Ignition switch: ON TF-38
switch is turned to ON.
(AWD LOCK indicator lamp check) Unified meter and A/C amp.
Unified meter control unit
CAN communication line
AWD warning lamp does not turn ON when
the ignition switch is turned to ON. Ignition switch: ON Unified meter and A/C amp. TF-40
(AWD warning lamp check)
Unified meter control unit
CAN communication line
Power supply and ground for AWD con-
trol unit
Unified meter and A/C amp.
AWD warning lamp does not turn OFF sev-
Engine running Unified meter control unit TF-41
eral seconds after engine started.
AWD solenoid
AWD actuator relay (integrated in AWD
control unit)
Wheel sensor
AWD lock switch

AWD mode cannot be switched after engine CAN communication line
Engine running TF-43
is started. Unified meter and A/C amp.
Unified meter control unit
CAN communication line
Heavy tight-corner braking symptom occurs q While driving AWD lock switch
when the vehicle is driven in AUTO mode q AUTO mode

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