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TRANSFER

D DRIVELINE/AXLE

SECTION TF
TRANSFER
B

E
CONTENTS
PRECAUTIONS ......................................................... 3
. Values .................................................................... 21
. F
Precautions for Supplemental Restraint System AWD CONTROL UNIT INSPECTION TABLE .... 21 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CONSULT-II Function (ALL MODE AWD/4WD) .... 22 .
SIONER" ................................................................. 3
. FUNCTION ......................................................... 22 . G
Precautions ............................................................. 3
. CONSULT-II SETTING PROCEDURE ............... 22 .
Service Notice or Precautions ................................. 4 . SELF-DIAG RESULTS MODE ........................... 23 .
PREPARATION .......................................................... 5
. DATA MONITOR MODE ..................................... 24 .
H
Special Service Tools .............................................. 5
. ACTIVE TEST MODE ........................................ 25 .
Commercial Service Tools ....................................... 7 . AWD CONTROL UNIT PART NUMBER ............ 25 .
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLE DIAGNOSIS FOR SYSTEM ................... 26 .
TROUBLESHOOTING ............................................... 8 . Power Supply Circuit for AWD Control Unit ........... 26 . I
NVH Troubleshooting Chart .................................... 8 . CONSULT-II REFERENCE VALUE IN DATA
TRANSFER OIL ......................................................... 9
. MONITOR MODE ............................................... 26 .
Changing Transfer Oil ............................................. 9. DIAGNOSTIC PROCEDURE ............................. 26 . J
DRAINING ............................................................ 9
. AWD Control Unit .................................................. 27 .
FILLING ................................................................ 9
. DIAGNOSTIC PROCEDURE ............................. 27 .
Checking Transfer Oil .............................................. 9
. ABS System .......................................................... 28.
K
OIL LEAKAGE AND OIL LEVEL .......................... 9 . DIAGNOSTIC PROCEDURE ............................. 28 .
AWD SYSTEM ......................................................... 10
. AWD Solenoid ....................................................... 28 .
Power Transfer Diagram ....................................... 10 . CONSULT-II REFERENCE VALUE IN DATA
System Description ............................................... 10. MONITOR MODE ............................................... 28 . L
ELECTRIC CONTROLLED COUPLING ............ 10 . DIAGNOSTIC PROCEDURE ............................. 29 .
AWD CONTROL UNIT ....................................... 10 . COMPONENT INSPECTION ............................. 31 .
AWD MODE SWITCH .........................................11 . AWD Actuator Relay .............................................. 32 . M
AWD INDICATOR LAMP AND LOCK INDICA- CONSULT-II REFERENCE VALUE IN DATA
TOR LAMP ..........................................................11
. MONITOR MODE ............................................... 32 .
AWD WARNING LAMP .......................................11 . DIAGNOSTIC PROCEDURE ............................. 32 .
System Diagram .................................................... 12
. AWD Mode Switch ................................................. 33 .
COMPONENTS FUNCTION DESCRIPTION .... 13 . CONSULT-II REFERENCE VALUE IN DATA
CAN Communication ............................................. 13 . MONITOR MODE ............................................... 33 .
SYSTEM DESCRIPTION ................................... 13 . DIAGNOSTIC PROCEDURE ............................. 33 .
TROUBLE DIAGNOSIS ........................................... 14 . COMPONENT INSPECTION ............................. 35 .
Fail-Safe Function ................................................. 14
. Engine Control Signal ............................................ 35 .
How to Perform Trouble Diagnosis ....................... 14 . DIAGNOSTIC PROCEDURE ............................. 35 .
BASIC CONCEPT .............................................. 14 . CAN Communication Line ..................................... 36 .
Location of Electrical Parts .................................... 15 . DIAGNOSTIC PROCEDURE ............................. 36 .
Circuit Diagram ..................................................... 16
. TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 37 .
Wiring Diagram -- AWD -- ................................... 17 . AWD Indicator Lamp and LOCK Indicator Lamp Do
Trouble Diagnosis Chart for Symptoms ................ 20 . Not Turn ON for Approx. 1 Second When Ignition
AWD Control Unit Input/Output Signal Reference Switch Is Turned to ON ......................................... 37 .

Revision: 2006 July TF-1 2006 X-Trail
DIAGNOSTIC PROCEDURE ............................. 37 . SIDE OIL SEAL ........................................................46
.
AWD Warning Lamp Does Not Turn ON When Igni- Removal and Installation ........................................46.
tion Switch Is Turned to ON ................................... 38 . REMOVAL ...........................................................46
.
DIAGNOSTIC PROCEDURE ............................. 38 . INSTALLATION ...................................................46
.
AWD Warning Lamp Does Not Turn OFF Several AIR BREATHER HOSE ............................................47 .
Seconds After Engine Started ................................ 39 . Components ...........................................................47
.
DIAGNOSTIC PROCEDURE ............................. 39 . Removal and Installation ........................................47.
AWD Mode Cannot Be Switched After Engine Is TRANSFER ASSEMBLY ..........................................48 .
Started ................................................................... 40
. Removal and Installation ........................................48.
DIAGNOSTIC PROCEDURE ............................. 40 . COMPONENTS ..................................................48 .
Heavy Tight-Corner Braking Symptom Occurs REMOVAL ...........................................................48
.
When Vehicle Is Driven in AUTO Mode and Steering INSTALLATION ...................................................49
.
Wheel Is Turned Fully to Either Side after Engine Disassembly and Assembly ...................................50 .
Is Started ............................................................... 41
. COMPONENTS ..................................................50 .
DIAGNOSTIC PROCEDURE ............................. 41 . ASSEMBLY INSPECTION ..................................51 .
Vehicle Does Not Enter AWD Mode Even Though DISASSEMBLY ...................................................55.
AWD Warning Lamp Turned to OFF ...................... 42 . INSPECTION AFTER DISASSEMBLY ...............59 .
DIAGNOSTIC PROCEDURE ............................. 42 . SELECTING ADJUSTING SHIMS ......................60 .
While Driving, AWD Warning Lamp Flashes Rapidly ASSEMBLY .........................................................62
.
(When Flashing in Approx. 1 Minute and Then Turn- SERVICE DATA AND SPECIFICATIONS (SDS) .....67 .
ing OFF) ................................................................ 43
. General Specifications ...........................................67
.
While Driving, AWD Warning Lamp Flashes Slowly Inspection and Adjustment .....................................67 .
(When Continuing to Flash Until Turning Ignition PRELOAD TORQUE BEFORE DISASSEMBLY...67
Switch OFF) ........................................................... 43
. PRELOAD TORQUE AFTER DISASSEMBLY
DIAGNOSTIC PROCEDURE ............................. 43 . AND REASSEMBLY ...........................................67 .
AWD CONTROL UNIT ............................................. 45 . BACKLASH .........................................................67
.
Removal and Installation ....................................... 45 . COMPANION FLANGE RUNOUT ......................67 .
REMOVAL .......................................................... 45. SELECTIVE PARTS ...........................................67 .
INSTALLATION ................................................... 45 .

Revision: 2006 July TF-2 2006 X-Trail
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" ADS0016Z

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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual. C
WARNING:
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. TF
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. E
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. F
Precautions ADS00170

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

SEF289H J

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

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-21,
"AWD Control Unit Input/Output Signal Reference Values" .

SDIA1848E

Revision: 2006 July TF-3 2006 X-Trail
PRECAUTIONS

Service Notice or Precautions ADS00171

q After overhaul refill the transfer with new transfer oil.
q Check the oil level or replace 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/or 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.
q Observe the specified torque when assembling.
q Clean and flush the parts sufficiently and blow-dry them.
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.

Revision: 2006 July TF-4 2006 X-Trail
PREPARATION

PREPARATION PFP:00002
A
Special Service Tools ADS00173

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

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

ZZA1149D

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

ZZA0503D
G
ST33220000 Removing drive pinion
(J-25804-01)
Drift
H
a: 37 mm (1.46 in) dia.
b: 31 mm (1.22 in) dia.
c: 22 mm (0.87 in) dia.
I
ZZA1046D

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

K
ZZA0601D

ST30031000 Removing pinion front bearing inner race
(J-22912-01) L
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-5 2006 X-Trail
PREPARATION

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

ST30720000 q Installing gear ring bearing outer race
(J-25405) (transfer case side)
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
(adapter case side)
q Installing gear ring bearing outer race
ZZA0811D (adapter case side)
q Installing transfer case oil seal
KV40101840 Installing gear ring bearing outer race
( -- ) (transfer case side)
Drift
a: 77 mm (3.03 in) dia.
b: 85 mm (3.35 in) dia.

ZZA0881D

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

ZZA1046D

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

ZZA1003D

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

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-6 2006 X-Trail
PREPARATION

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

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

ZZA1046D

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

ZZA0814D
F
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. G
b: 45 mm (1.77 in) dia.
c: 35.2 mm (1.386 in) dia.

ZZA0978D
H

Commercial Service Tools ADS00189

Tool name Description
I

Power tool Loosening nuts and bolts

K
PBIC0190E

Revision: 2006 July TF-7 2006 X-Trail
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING PFP:00003

NVH Troubleshooting Chart ADS00174

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.

TF-50

TF-59

TF-59
TF-9
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)
SUSPECTED PARTS
(Possible cause)

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

Revision: 2006 July TF-8 2006 X-Trail
TRANSFER OIL

TRANSFER OIL PFP:KLD30
A
Changing Transfer Oil ADS00175

DRAINING
CAUTION: B
When draining oil, protect exhaust tube with cover.
1. Run vehicle to warm up transfer body sufficiently.
2. Stop engine, and remove drain plug to drain transfer oil. C
3. Apply sealant to drain plug. Install drain plug on transfer and
tighten to the specified torque. Refer to TF-50, "COMPO-
NENTS" .
TF
q Use Genuine Silicone RTV or equivalent. Refer to GI-47,
"Recommended Chemical Products and Sealants" .
E

SDIA0512E
F
FILLING
1. Remove filler plug and add gear oil until oil level reaches the
specified limit near filler plug mounting hole. G
Oil grade and Viscosity:
Refer to MA-10, "Fluids and Lubricants" .
H
Oil capacity:
Approx. 0.31 (5/8 US pt, 1/2 lmp pt)
CAUTION: I
Carefully fill oil. (Fill up for approx. 3 minutes)
2. Leave vehicle for 3 minutes, and check oil level again. SDIA0513E

3. Apply sealant to filler plug. Install filler plug on transfer and J
tighten to the specified torque. Refer to TF-50, "COMPONENTS" .
q Use Genuine Silicone RTV or equivalent. Refer to GI-47, "Recommended Chemical Products and
Sealants" . K
Checking Transfer Oil ADS00176

OIL LEAKAGE AND OIL LEVEL
L
1. Check oil level from filler plug mounting hole as shown in the fig-
ure.
CAUTION:
Do not start engine while checking oil level. M
2. Before installing filler plug, apply sealant. Install filler plug on
transfer and tighten to the specified torque. Refer to TF-50,
"COMPONENTS" .
q Use Genuine Silicone RTV or equivalent. Refer to GI-47,
"Recommended Chemical Products and Sealants" .
SDIA0513E

Revision: 2006 July TF-9 2006 X-Trail
AWD SYSTEM

AWD SYSTEM PFP:41650

Power Transfer Diagram ADS00177

SDIA1607E

System Description ADS00178

ELECTRIC CONTROLLED COUPLING
Operation Principle
1. The AWD control unit supplies command current to the electric
controlled coupling (AWD solenoid).
2. The control clutch is engaged by the electromagnet and torque
is detected in control clutch.
3. The cam operates in response to the control clutch torque and
applies pressure to the main clutch.
4. The main clutch transmits torque to front wheels according to
pressing power.

SDIA2501E

q Transmission torque to the rear wheels is determined accord-
ing to command current.

SDIA1844E

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 the signals from the sensors.
q Self-diagnosis results can be read with CONSULT-II.

SDIA2502E

Revision: 2006 July TF-10 2006 X-Trail
AWD SYSTEM

AWD MODE SWITCH
AUTO Mode A
q Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
q AWD mode makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.
B
q On roads which do not require AWD, AUTO mode contributes to improved fuel economy by driving in con-
ditions 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. C

LOCK Mode
q Front/rear wheel torque distribution is fixed, ensuring stable driving when climbing slopes. TF
q AWD control unit 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.
q LOCK mode will change to AUTO mode automatically, when the vehicle speed exceeds approx. 30 km/h E
(19 MPH). The LOCK indicator light keeps illuminating.
NOTE:
If there is a significant difference in pressure or wear between tires, full vehicle performance is not available. F
LOCK mode may be prohibited, or speeds at which LOCK mode is enabled may be restricted detecting tire
conditions.
2WD Mode G
Vehicle is in front-wheel drive.
NOTE:
q If front wheels are slipping in 2WD mode, do not switch to AUTO or LOCK. This can cause difficulties for H
the system.
q Even if the AWD mode switch is in 2WD mode, the AWD control unit occasionally automatically change to
AUTO mode depending on the driving condition (For example; Depressing the acceleration firmly). This is I
not malfunction. However, AWD indicator lamp dose not illuminate.
AWD INDICATOR LAMP AND LOCK INDICATOR LAMP
The following is the indications of indicator lamp. J

Condition AWD indicator lamp LOCK indicator lamp
AUTO mode ON OFF K
LOCK mode ON ON
2WD mode OFF OFF
Lamp check Turns ON for approx. 1 second when ignition switch is turned ON. L

SDIA2503E M
AWD WARNING LAMP
Turns ON when there is a malfunction in AWD system. It indicates that the vehicle is in fail-safe mode and
changes 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 for 1 second after the engine starts if system is normal.
AWD Warning Lamp Indication
Condition AWD warning lamp
Turns ON when ignition switch is turned ON. Turns OFF
Lamp check
approx. 1 seconds after engine start.
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.)
changes to 2WD mode.)

Revision: 2006 July TF-11 2006 X-Trail
AWD SYSTEM

Condition AWD warning lamp
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

System Diagram ADS00179

SDIA2504E

Revision: 2006 July TF-12 2006 X-Trail
AWD SYSTEM

COMPONENTS FUNCTION DESCRIPTION
Component parts Function
A

q Controls driving force distribution by signals from each sensor and switches from front wheel driv-
AWD control unit ing mode (100:0) to AWD mode (50:50).
B
q 2WD mode is available by fail-safe function if malfunction is detected in electrical system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by operation signal from AWD control unit. C
Electric controlled coupling Transmits driving force to rear final drive.
AWD mode switch Able to select from 2WD, AUTO or LOCK mode.
q Illuminates if malfunction is detected in electrical system of AWD system. TF
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.
E
AWD indicator lamp Indicates operation with optimal distribution of torque to front/rear wheels.
LOCK indicator lamp Indicates that AWD system is under direct 4-wheel driving mode.
ABS actuator and electric unit Transmits the following signals via CAN communication to AWD control unit. F
(control unit) (without VDC) or
q Vehicle speed signal
VDC/TCS/ABS control unit
(with VDC) q Stop lamp switch signal (brake signal)
G
Transmits the following signals via CAN communication to AWD control unit.
ECM q Accelerator pedal position signal
q Engine speed signal
H
Unified meter control unit Transmits conditions of parking brake switch via CAN communication to AWD control unit.

CAN Communication ADS0017A

SYSTEM DESCRIPTION I
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 J
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. K
For details, refer to LAN-21, "CAN Communication Unit" .

Revision: 2006 July TF-13 2006 X-Trail
TROUBLE DIAGNOSIS

TROUBLE DIAGNOSIS PFP:00004

Fail-Safe Function ADS0017B

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.
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 ADS0017C

BASIC CONCEPT
q To perform trouble diagnosis, it is the most important to have understanding about vehicle systems (con-
trol and mechanism) thoroughly.
q It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptoms, and understand them fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptoms by driving vehicle with
customer.
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".
SEF233G

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
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-
out any symptom diagnosis, you cannot judge if malfunctions
have actually been eliminated.
q After completing diagnosis, always erase diagnostic memory.
Refer to TF-24, "How to Erase Self-Diagnosis Results" . SEF234G

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

Revision: 2006 July TF-14 2006 X-Trail
TROUBLE DIAGNOSIS

Location of Electrical Parts ADS0017D

L
SDIA2506E

Revision: 2006 July TF-15 2006 X-Trail
TROUBLE DIAGNOSIS

Circuit Diagram ADS0017E

TDWB0001E

Revision: 2006 July TF-16 2006 X-Trail
TROUBLE DIAGNOSIS

Wiring Diagram -- AWD -- ADS0017F

TDWB0002E

Revision: 2006 July TF-17 2006 X-Trail
TROUBLE DIAGNOSIS

TDWB0053E

Revision: 2006 July TF-18 2006 X-Trail
TROUBLE DIAGNOSIS

TDWB0004E

Revision: 2006 July TF-19 2006 X-Trail
TROUBLE DIAGNOSIS

Trouble Diagnosis Chart for Symptoms ADS0017G

If AWD warning lamp turns ON, perform self-diagnosis. Refer to TF-23, "SELF-DIAG RESULTS MODE" .
Symptom Condition Check item Reference page
AWD indicator lamp and LOCK indicator CAN communication line
lamp do not turn ON for approx. 1 second
Power supply and ground for AWD con-
when ignition switch is turned to ON. Ignition switch: ON TF-37
trol unit
(AWD indicator lamp and LOCK indicator
lamp check) Unified meter control unit
AWD warning lamp does not turn ON when CAN communication line
ignition switch is turned to ON. Ignition switch: ON TF-38
(AWD warning lamp check) Unified meter control unit

CAN communication line
Power supply and ground for AWD con-
trol unit

AWD warning lamp does not turn OFF sev- Unified meter control unit
Engine running TF-39
eral seconds after engine started. AWD solenoid
AWD actuator relay (integrated in AWD
control unit)
Wheel sensor
AWD mode switch
AWD mode cannot be switched after engine
Engine running CAN communication line TF-40
is started.
Unified meter control unit
CAN communication line
q While driving
AWD mode switch
Heavy tight-corner braking symptom occurs
q AUTO mode
when vehicle is driven in AUTO mode and Accelerator pedal position signal
q Steering wheel is TF-41
steering wheel is turned fully to either side
turned fully to either AWD solenoid
after engine is started. (See NOTE.)
sides Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)
AWD solenoid
Vehicle speed: 10 km/h Mechanical malfunction of electric con-
(6 MPH) or less trolled coupling (Mechanical engage-
ment of clutch is not possible.)
Vehicle does not enter AWD mode even
Operating condition of parking brake TF-42
though AWD warning lamp turned to OFF.
AWD solenoid
Vehicle speed: 10 km/h
(6 MPH) or more Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
While driving, AWD warning lamp flashes q While driving Protection function is activated due to
rapidly. (When flashing in approx. 1 minute heavy load to electric controlled cou-
q AUTO mode and TF-43
and then turning OFF.) pling. (AWD system is not malfunction-
Rapid flashing: 2 times/second LOCK mode ing.)
While driving, AWD warning lamp flashes q While driving
slowly. (When continuing to flash until turn- Tire size is different between front and
q Vehicle speed: 20 km/h TF-43
ing ignition switch OFF) rear of vehicle.
Slow flashing: 1 time/2 seconds (12 MPH) or more

NOTE:
q Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not malfunction.

q Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: LOCK mode, steering
wheel is turned fully to either side, and accelerator pedal was depressed.

Revision: 2006 July TF-20 2006 X-Trail
TROUBLE DIAGNOSIS

AWD Control Unit Input/Output Signal Reference Values ADS0017H

AWD CONTROL UNIT INSPECTION TABLE A
Specifications with CONSULT-II
Monitor item [Unit] Content Condition Display value
B
Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
Wheel speed (Front wheel Approximately equal to
FR RH SENSOR [km/h] or [mph] CAUTION:
right) the indication on speed- C
Check air pressure of tire under ometer (Inside of

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