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D DRIVELINE/AXLE

B
SECTION
TRANSFER C

E
CONTENTS
PRECAUTIONS ......................................................... 4 . INDICATIONS OF 4WD WARNING LAMP ......... 29 . F
Precautions for Supplemental Restraint System Trouble Diagnosis with CONSULT-II ..................... 30 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- CONSULT-II FUNCTION .................................... 30 .
SIONER" ................................................................. 4
. SELF-DIAGNOSIS ............................................. 30 . G
Precautions for Transfer Assembly and Transfer SELF-DIAGNOSTIC ITEMS ............................... 31 .
Control Unit Replacement ....................................... 4 . DATA MONITOR ................................................ 33 .
METHOD FOR POSITION ADJUSTMENT .......... 4 . DATA MONITOR ITEMS .................................... 34 .
H
Precautions ............................................................. 4
. REFERENCE VALUE IN DATA MONITOR MODE
Service Notice ......................................................... 5
. ... 37
Wiring Diagrams and Trouble Diagnosis ................. 5 . WORK SUPPORT .............................................. 40 .
PREPARATION .......................................................... 6 . CLUTCH FORCE RELEASE LIMIT ADJUST- I
Special Service Tools .............................................. 6 . MENT ................................................................. 41
.
Commercial Service Tools ....................................... 9 . TROUBLE DIAGNOSIS -- INTRODUCTION .......... 43 .
ALL-MODE 4WD SYSTEM ..................................... 10 . Introduction ............................................................ 43
. J
Cross-sectional View ............................................. 10 . DESCRIPTION ................................................... 43 .
Control System .......................................................11 . DIAGNOSTIC WORKSHEET ............................. 43 .
ALL-MODE 4WD TRANSFER BASIC CONTROL Work Flow .............................................................. 45
.
K
... 12 HOW TO PERFORM TROUBLE DIAGNOSES
HYDRAULIC CONTROL CIRCUITS .................. 12 . FOR QUICK AND ACCURATE REPAIR ............ 45 .
OUTLINE ............................................................ 12. TROUBLE DIAGNOSIS -- BASIC INSPECTION ... 46
CONTROL SYSTEM DIAGRAM ........................ 13 . Listen to Customer Complaints ............................. 46 . L
INDICATIONS OF 4WD WARNING LAMP ........ 13 . Transfer Fluid Check ............................................. 46 .
Can Communication .............................................. 13 . Road Test .............................................................. 46
.
SYSTEM DESCRIPTION ................................... 13 . PREPARATION FOR ROAD TEST .................... 46 . M
Location of Electrical Parts .................................... 14 . 1. CHECK BEFORE ENGINE IS STARTED ...... 47 .
Description of Electrical Parts ............................... 15 . 2. CHECK AT IDLE ............................................. 48 .
TRANSFER MOTOR ......................................... 15 . 3. CRUISE TEST ................................................ 52 .
WAIT DETECTION SWITCH ............................. 15 . TROUBLE DIAGNOSIS -- GENERAL DESCRIP-
2-4WD SHIFT SOLENOID VALVE ..................... 15 . TION ......................................................................... 54
.
LINE PRESSURE SWITCH ............................... 16 . Transfer Control Unit Terminals and Reference
Circuit Diagram for Quick Pinpoint Check ............. 17 . Value ...................................................................... 54
.
Wiring Diagram -- TF -- ....................................... 18 . REMOVAL AND INSTALLATION OF TRANSFER
ON BOARD DIAGNOSTIC SYSTEM DESCRIP- CONTROL UNIT ................................................ 54 .
TION ......................................................................... 27
. INSPECTION OF TRANSFER CONTROL UNIT 54 ...
Trouble Diagnosis without CONSULT-II ................ 27 . TRANSFER CONTROL UNIT INSPECTION
DESCRIPTION ................................................... 27 . TABLE ................................................................ 54
.
SELF-DIAGNOSTIC PROCEDURE ................... 28 . DTC U1000, U1001 CAN COMMUNICATION LINE... 58
CAN Communication System Inspection ............... 58 .
4WD SOLENOID VALVE ......................................... 59 .
Diagnostic Procedure ............................................ 59 .

Revision: January 2005 TF-1 2004 Pathfinder Armada
2-4WD SHIFT SOLENOID VALVE AND 4WD SHIFT FER FLUID TEMPERATURE SENSOR .............97 .
SWITCH .................................................................... 61
. 4WD SOLENOID VALVE, CLUTCH PRESSURE
Diagnostic Procedure ............................................ 61 . SWITCH AND LINE PRESSURE SWITCH ........97 .
TRANSFER MOTOR AND TRANSFER MOTOR TRANSFER DROPPING RESISTOR .................97 .
RELAY ...................................................................... 63
. ATP SWITCH, NEUTRAL-4LO SWITCH AND
Diagnostic Procedure ............................................ 63 . WAIT DETECTION SWITCH ..............................98 .
TRANSFER FLUID TEMPERATURE SENSOR ...... 65 . TRANSFER MOTOR ..........................................98 .
Diagnostic Procedure ............................................ 65 . TRANSFER MOTOR RELAY ..............................98 .
ATP SWITCH, WAIT DETECTION SWITCH AND TRANSFER SHIFT RELAY (HIGH & LOW) ........99 .
NEUTRAL-4LO SWITCH ......................................... 68 . ACTUATOR & ACTUATOR POSITION SWITCH...99
Diagnostic Procedure ............................................ 68 . TRANSFER CONTROL UNIT ................................ 100 .
CLUTCH PRESSURE SWITCH ............................... 71 . Removal and Installation ...................................... 100 .
Diagnostic Procedure ............................................ 71 . REMOVAL ......................................................... 100 .
LINE PRESSURE SWITCH ...................................... 74 . INSTALLATION ................................................. 100 .
Diagnostic Procedure ............................................ 74 . FRONT OIL SEAL .................................................. 101 .
DATA ERASE/DISPLAY ........................................... 76 . Removal and Installation ...................................... 101 .
Diagnostic Procedure ............................................ 76 . REMOVAL ......................................................... 101 .
SHIFT ACTUATOR .................................................. 77 . INSTALLATION ................................................. 102 .
Diagnostic Procedure ............................................ 77 . REAR OIL SEAL .................................................... 103 .
SHIFT ACTUATOR POSITION SWITCH ................. 80 . Removal and Installation ...................................... 103 .
Diagnostic Procedure ............................................ 80 . REMOVAL ......................................................... 103 .
SHIFT ACTUATOR CIRCUIT ................................... 82 . INSTALLATION ................................................. 103 .
Diagnostic Procedure ............................................ 82 . SIDE OIL SEAL ...................................................... 105 .
TROUBLE DIAGNOSES FOR SYMPTOMS ............ 85 . Removal and Installation ...................................... 105 .
Symptom 1. 4WD Shift Indicator Lamp Does Not REMOVAL ......................................................... 105 .
Turn ON (Although the ignition switch is turned "ON", INSTALLATION ................................................. 105 .
all the 4WD indicator lamps do not turn ON for 1 TRANSFER CONTROL DEVICE ........................... 106 .
second) .................................................................. 85
. Removal and Installation ...................................... 106 .
Symptom 2. 4WD Warning Lamp Does Not Turn ON AIR BREATHER HOSE .......................................... 107 .
(Although the ignition switch is turned "ON", the Removal and Installation ...................................... 107 .
4WD warning lamp does not turn ON) ................... 87 . TRANSFER MOTOR .............................................. 108 .
Symptom 3. 4WD Shift Indicator Lamp Does Not Removal and Installation ...................................... 108 .
Turn OFF (When 4WD shift switch is set from "4H" REMOVAL ......................................................... 108 .
to "4LO", all the 4WD shift indicator lamps do not INSTALLATION ................................................. 108 .
turn off) .................................................................. 89
. TRANSFER OIL FILTER ........................................ 109 .
Symptom 4. ATP Warning Lamp Does Not Turn ON Removal and Installation ...................................... 109 .
(When 4WD shift switch is set from "4H" to "4LO" REMOVAL ......................................................... 109 .
with the A/T selector lever in "P" position, the ATP INSTALLATION ................................................. 109 .
warning lamp does not turn on) ............................. 90 . REMOVAL AND INSTALLATION ........................... 111 .
Symptom 5. 4LO Indicator Lamp Does Not Turn ON Removal ............................................................... 111
.
(When 4WD shift switch is set from "4H" to "4LO" Installation ............................................................ 111
.
position, 4LO indicator lamp does not turn ON) .... 91 . OVERHAUL ............................................................ 112 .
Symptom 6. 4WD Shift Indicator Lamp Does Not Transfer Components .......................................... 112 .
Indicate "LOCK" (When 4WD shift switch is set to REAR CASE ........................................................... 114 .
"4H", 4WD shift indicator lamp does not indicate Disassembly ......................................................... 114
.
"LOCK") ................................................................. 92
. CENTER CASE ...................................................... 115 .
Symptom 7. 4WD Shift Indicator Lamp Repeats Disassembly ......................................................... 115
.
Flickering (4WD shift indicator lamp keeps flicker- FRONT DRIVE SHAFT AND DRIVE CHAIN .... 117 .
ing) ......................................................................... 94
. MAINSHAFT AND CLUTCH DRUM ................. 118 .
Symptom 8. Tight Corner Braking Symptom (Tight CLUTCH PISTON ............................................. 120 .
corner braking symptom occurs) (Hydraulic system CONTROL VALVE ............................................ 121 .
failure) .................................................................... 95
. MAINSHAFT REAR BEARING ......................... 124 .
Symptom 9. 4WD System Does Not Operate (The MAIN OIL PUMP ............................................... 124 .
vehicle cannot be put into 4WD mode) (Hydraulic SUB OIL PUMP ................................................ 125 .
system failure) ....................................................... 96 . OIL FILTER ....................................................... 126.
Component Inspection ........................................... 97 . FRONT CASE ......................................................... 127 .
4WD SHIFT SWITCH ......................................... 97 . Disassembly ......................................................... 127
.
2-4WD SHIFT SOLENOID VALVE AND TRANS- SHIFT ROD COMPONENTS ............................127 .
PLANETARY CARRIER, SUN GEAR AND

Revision: January 2005 TF-2 2004 Pathfinder Armada
INTERNAL GEAR ............................................ 129 . CENTER CASE ...................................................... 142.
FRONT CASE ........................................................ 133. Assembly ............................................................. 142
. A
Inspection ............................................................ 133
. OIL FILTER ....................................................... 142
.
PLANETARY CARRIER ................................... 133 . SUB OIL PUMP ................................................ 142 .
SUN GEAR ...................................................... 133 . MAIN OIL PUMP .............................................. 143 . B
INTERNAL GEAR ............................................ 133 . CONTROL VALVE ............................................ 144 .
SHIFT ROD COMPONENTS ........................... 133 . CLUTCH PISTON ............................................. 146 .
CENTER CASE ..................................................... 135 . MAINSHAFT AND CLUTCH DRUM ................. 147 .
Inspection ............................................................ 135
. FRONT DRIVE SHAFT AND DRIVE CHAIN .... 150 . C
BEARINGS ....................................................... 135. ASSEMBLY ............................................................ 151
.
SUB-OIL PUMP ............................................... 135 . Final Assembly .................................................... 151
.
MAIN OIL PUMP .............................................. 135 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 155 . TF
MAINSHAFT .................................................... 135 . General Specifications ......................................... 155 .
CONTROL VALVE ........................................... 136 . Inspection and Adjustment .................................. 155 .
CLUTCH ........................................................... 136
. CLEARANCE BETWEEN INNER GEAR AND E
FRONT CASE ........................................................ 138. OUTER GEAR .................................................. 155 .
Assembly ............................................................. 138
. CLUTCH ........................................................... 155
.
PLANETARY CARRIER, SUN GEAR AND PINION GEAR END PLAY ............................... 155 .
INTERNAL GEAR ............................................ 138 . CLEARANCE BETWEEN SHIFT FORK AND F
SHIFT ROD ASSEMBLY .................................. 141 . SLEEVE ........................................................... 155
.
SELECTIVE PARTS .........................................
G

Revision: January 2005 TF-3 2004 Pathfinder Armada
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EDS00114

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:
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.
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.
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.
Precautions for Transfer Assembly and Transfer Control Unit Replacement EDS00348

When replacing transfer assembly or transfer control unit, check the 4WD shift indicator lamp as follows.
1. Turn ignition switch "ON".
2. Check 4WD shift indicator lamp is turned ON for approx. 1 second.
q If OK, the position between transfer assembly and transfer control unit is correct.
q If NG, the position is different between transfer assembly and transfer control unit.
Adjust the position between transfer assembly and transfer control unit. Refer to TF-4, "METHOD FOR
POSITION ADJUSTMENT" .
METHOD FOR POSITION ADJUSTMENT
1. Start engine. Run the engine for at least 10 seconds.
2. Stop vehicle and move A/T selector lever to "N" position with brake pedal depressed. Stay in "N" for at
least 2 seconds.
3. Turn 4WD shift switch to "2WD" position. Stay in "2WD" for at least 2 seconds.
4. Turn ignition switch "OFF".
5. Start engine.
6. Erase self-diagnosis. Refer to TF-30, "Trouble Diagnosis with CONSULT-II" (with CONSULT-II) or TF-27,
"Trouble Diagnosis without CONSULT-II" (without CONSULT-II).
7. Check 4WD shift indicator lamp. Refer to TF-47, "1. CHECK BEFORE ENGINE IS STARTED" .
If 4WD shift indicator lamp does not indicate "2WD", install new transfer control unit and retry the above
check.
Precautions EDS000YZ

q Before connecting or disconnecting the transfer control
unit harness connector, turn ignition switch OFF and dis-
connect negative battery terminal. Failure to do so may
damage the transfer control unit. Because battery voltage is
applied to transfer control unit even if ignition switch is
turned off.

SEF289H

Revision: January 2005 TF-4 2004 Pathfinder Armada
PRECAUTIONS

q When connecting or disconnecting pin connectors into or
from transfer control unit, take care not to damage pin ter- A
minals (bend or break).
Make sure that there are not any bends or breaks on trans-
fer control unit pin terminal, when connecting pin connec-
B
tors.

SEF291H

TF
q Before replacing transfer control unit, perform transfer con-
trol unit input/output signal inspection and make sure
whether transfer control unit functions properly or not. (See
E
page TF-54 .)

G
MEF040DB

Service Notice EDS000Z0
H
1. Before proceeding with disassembly, thoroughly clean the outside of the all-mode 4WD transfer. It is
important to prevent the internal parts from becoming contaminated by dirt or other foreign matter.
2. Disassembly should be done in a clean work area.
I
3. Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the all-mode 4WD transfer.
4. Place disassembled parts in order for easier and proper assembly.
J
5. All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
6. Gaskets, seals and O-rings should be replaced any time the all-mode 4WD transfer is disassembled. K
7. It is very important to perform functional tests whenever they are indicated.
8. The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place removed parts in a parts rack in order to replace them in correct positions and sequences. Care will L
also prevent springs and small parts from becoming scattered or lost.
9. Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
10. Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings M
and seals, and to hold bearings and washers in place during assembly. Do not use grease.
11. Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
12. After overhaul, refill the transfer with new ATF.
13. When the all-mode 4WD transfer drain plug is removed, only some of the fluid is drained. Old all-mode
4WD transfer fluid will remain in torque converter and ATF cooling system. Always follow the proper pro-
cedure. Refer to MA-24, "Changing Transfer Fluid" .
Wiring Diagrams and Trouble Diagnosis EDS000Z1

When you read wiring diagrams, refer to the following:
q GI-15, "HOW TO READ WIRING DIAGRAMS"
q PG-4, "POWER SUPPLY ROUTING"
When you perform trouble diagnosis, refer to the following:
q GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSIS"
q GI-27, "HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT"

Revision: January 2005 TF-5 2004 Pathfinder Armada
PREPARATION

PREPARATION PFP:00002

Special Service Tools EDS001DX

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
ST30021000 Removing carrier bearing
( -- ) a: 110 mm (4.33 in) dia.
Puller b: 68 mm (2.68 in) dia.

NT411

ST30031000 Removing front driveshaft bearing
( -- ) a: 90 mm (3.54 in) dia.
Puller b: 50 mm (1.97 in) dia.

NT411

ST30720000 Installing mainshaft front bearing and oil seal
(J-25405) a: 77 mm (3.03 in) dia.
Drift b: 55.5 mm (2.185 in) dia.

NT658

ST33220000 Installation needle bearings
( -- ) a: 37 mm (1.46 in) dia.
Drift b: 31 mm (1.22 in) dia.
c: 22 mm (0.87 in) dia.

ZZA1046D

KV40100621 Installing front drive shaft front and rear bear-
(J-25273) ing
Drift a: 76 mm (2.99 in) dia.
b: 69 mm (2.72 in) dia.

NT086

ST30032000 Installing front drive shaft bearing
(J-26010-01) a: 38 mm (1.50 in) dia.
Base b: 80 mm (3.15 in) dia.

NT660

ST33052000 Removing front drive shaft bearing
( -- ) a: 28 mm (1.10 in) dia.
Adapter b: 22 mm (0.87 in) dia.

NT431

Revision: January 2005 TF-6 2004 Pathfinder Armada
PREPARATION

Tool number Description
(Kent-Moore No.) A
Tool name
ST33200000 Removing mainshaft front bearing
(J-26082) Installing planetary carrier assembly B
Support ring Installing oil seal
a: 74.5 mm (2.933 in) dia.
b: 62.5 mm (2.461 in) dia.
C

NT661

ST3532500 Removing metal bushing TF
( -- ) a: 215 mm (8.46 in)
Remover b: 25 mm (0.98 in) dia.
c: M 12 x P=1.5
E

NT663

KV38100500 Installing front oil seal
F
( -- ) a: 80 mm (3.15 in) dia.
Drift b: 60 mm (2.36 in) dia.
G

NT115 H
ST30911000
( -- ) Removing and installing press flange snap
Puller ring
I
Installing carrier bearing
Installing mainshaft center case
a: 98 mm (3.86 in) dia.
b: 40.5 mm (1.594 in) dia. J
NT664

ST33290001 Removing metal bushing and oil seal
(J-34286)
Outer race puller K

L
NT665

ST22452000 Removing and installing press flange snap
(J-34335) ring M
Drift a: 45 mm (1.77 in) dia.
b: 36 mm (1.42 in) dia.
c: 400 mm (15.76 in) dia.

NT117

KV38100300 Removing mainshaft rear bearing
(J-25523) a: 54 mm(2.13 in) dia.
Drift b: 46 mm (1.81 in) dia.
c: 32 mm (1.26 in) dia.

ZZA1046D

Revision: January 2005 TF-7 2004 Pathfinder Armada
PREPARATION

Tool number Description
(Kent-Moore No.)
Tool name
ST35300000 Removing sun gear assembly
( -- ) Removing carrier bearing
Drift Installing metal bushing
a: 59 mm (2.32 in) dia.
b: 45 mm (1.77 in) dia.

NT073

ST33710000 Removing needle bearing
( -- ) Removing metal bushing
Drift a: 89 mm (3.5 in)
b: 30 mm (1.18 in) dia.
c: 24 mm (0.9 in) dia.

ZZA1057D

ST22360002 Installing oil seal
(J-25679-01) a: 23 mm (0.91 in) dia.
Drift b: 32 mm (1.26 in) dia.

ZZA1091D

ST15310000 Installing mainshaft rear bearing
(J-25640-B) a: 96 mm (3.78 in) dia.
Drift b: 84 mm (3.31 in) dia.

ZZA0908D

KV40105310 Installing dust cover
( -- ) Installing carrier bearing
Support ring a: 89.1 mm (3.508 in) dia.
b: 80.7 mm (3.177 in) dia.

NT661

KV31103300 Removing and installing press flange snap
( -- ) ring
Drift a: 76.3 mm (3.004 in) dia.
b: 130 mm (5.12 in)

NT668

Revision: January 2005 TF-8 2004 Pathfinder Armada
PREPARATION

Commercial Service Tools EDS001DY

A
Tool name Description
Flange wrench Removing and installing companion flange
B

C
NT771

Puller Removing companion flange
TF

NT077

Pin punch Removing and installing retainer pin F
a: 6 mm (0.24 in) dia.

NT410
H
Power tool Removing transfer case assembly

J
PBIC0190E

Revision: January 2005 TF-9 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

ALL-MODE 4WD SYSTEM PFP:00000

Cross-sectional View EDS001DZ

LDIA0053E

1. Center case 2. Chain 3. Multiple disc clutch
4. Rear case 5. Main shaft 6. Clutch hub assembly
7. Sub oil pump 8. Transfer motor 9. Control valve
10. Front drive shaft 11. Drain plug 12. 2-4 sleeve
13. Sun gear assembly 14. L-H sleeve 15. Planetary carrier assembly
16. Internal gear 17. Front case

Revision: January 2005 TF-10 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

Control System EDS000Z3

LDIA0054E

Revision: January 2005 TF-11 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

ALL-MODE 4WD TRANSFER BASIC CONTROL

LDIA0055E

HYDRAULIC CONTROL CIRCUITS

WDIA0056E

OUTLINE
All-mode 4WD transfer is controlled by the transfer control unit and sensors.
If a malfunction occurs in the all-mode 4WD system, the 4WD warning lamp lights up to indicate the system
malfunction. There are two ways to identify the cause of the malfunction.
1. Performing the self-diagnosis. (The 4WD warning lamp will indicate what kind of malfunction has occurred
by flickering.)
2. Performing diagnosis using CONSULT-II.

Revision: January 2005 TF-12 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

CONTROL SYSTEM DIAGRAM
A

LDIA0056E

INDICATIONS OF 4WD WARNING LAMP G
Condition Content 4WD warning lamp
During self-diagnosis Indicates the malfunction position by number of flickers. Flickers at malfunction mode.
H
Checks the lamp by turning ON during engine starting. After
Lamp check* ON
engine starts, it turns OFF if there are no malfunctions.
Turns ON to indicate malfunction. When ignition switch is
Malfunction in 4WD system*
turned to "OFF" or the malfunction is corrected, it turns OFF.
ON I

When vehicle is driven with different Flickers once every 2 seconds. Flickers once every 2 sec-
diameters of front and rear tires Turns OFF when ignition switch is "OFF". onds.
J
When fluid temperature is high or fluid temperature sensor cir-
High fluid temperature in transfer unit cuit is shorted, it flickers twice every second. Flickers twice a second.
It turns OFF when fluid temperature becomes normal.
Other than above (System is nor- K
Lamp is OFF. OFF
mal.)
*: When 4WD warning lamp is ON, all the 4WD shift indicator lamps turn OFF.
L
Can Communication EDS000Z4

SYSTEM DESCRIPTION
Refer to LAN-5, "CAN COMMUNICATION" . M

Revision: January 2005 TF-13 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

Location of Electrical Parts EDS000Z5

WDIA0107E

Revision: January 2005 TF-14 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

Description of Electrical Parts EDS000Z6

TRANSFER MOTOR A
1. The transfer motor drives the sub-oil pump to provide proper lubrication and oil pressure control when the
vehicle is at standstill, during low-speed operations or is being driven in reverse.
2. The main oil pump is operated by the driving force of the mainshaft. In other words, sufficient oil pressure B
buildup does not occur when the vehicle is at standstill or during low-speed operations. While the vehicle
is being driven in reverse, the main oil pump rotates in the reverse direction. Therefore the main oil pump
does not discharge oil pressure. During any of the above vehicle operations, the transfer motor drives the C
sub-oil pump to compensate for insufficient oil pressure.
3. The transfer motor operates as follows:
1. The motor relay turns OFF in the 2WD mode. TF
2. The motor relay operates as described in the table below in modes other than the 2WD mode.
Table 1
E
PNP switch "R" position VFF (Vehicle speed) A/T position Motor relay drive command
ON -- R ON
Positions other than the "P" or F
0 ON
"N" positions
"P" or "N" position (See Table
-- --
2.)
OFF G
0 < VFF 50 km/h (30 MPH) -- ON
50 km/h (30 MPH) < VFF < 55
-- HOLD
km/h (35 MPH)
H
55 km/h (35 MPH) VFF -- OFF

Table 2
I
Throttle position
A/T position N-4L SW 4WD mode
0 - 0.07/8 0.07/8 - 1/8 1/8 - MAX
LOCK (4H) ON ON ON J
OFF Positions other than
N the LOCK position See NOTE. HOLD ON
(2WD or AUTO)
K
ON -- See NOTE. HOLD ON
P -- -- See NOTE. HOLD ON
NOTE: L
OFF (after 2.5 seconds have elapsed.)
4. 4WD shift switch, PNP switch, Neutral-4LO switch, vehicle speed sensor and throttle position sensor are
used in conjunction with the transfer motor. M
WAIT DETECTION SWITCH
1. The wait detection switch releases the "booming" torque produced in the propeller shaft. After the release
of the "booming" torque, the wait detection switch helps provide the 4WD lock gear (clutch drum) shifts. A
difference may occur between the operation ("4LO" to "4H" shift only) of the 4WD shift switch and actual
drive mode. At this point, the wait detection switch senses an actual drive mode.
2. The wait detection switch operates as follows:
4WD lock gear (clutch drum) locked: ON
4WD lock gear (clutch drum) released: OFF
3. The wait detection switch senses an actual drive mode and the 4WD shift indicator lamp indicates the
vehicle drive mode.
2-4WD SHIFT SOLENOID VALVE
The 2-4WD shift solenoid valve operates to apply oil pressure to the wet, multiplate clutch, depending on the
drive mode. The driving force is transmitted to the front wheels through the clutch so the vehicle is set in the
4WD mode. Setting the vehicle in the 2WD mode requires no pressure buildup. In other words, pressure force
applied to the wet, multiplate clutch becomes zero.

Revision: January 2005 TF-15 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

LINE PRESSURE SWITCH
1. With the transfer system design, control of the oil pressure provides the transmission of drive torque to the
front wheels. The main pressure to control the oil pressure is referred to as the line pressure.
The line pressure switch determines whether or not adequate line pressure has built up under different
operating conditions.
2. The line pressure switch turns ON when line pressure is produced.
3. The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.

Revision: January 2005 TF-16 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

Circuit Diagram for Quick Pinpoint Check EDS000Z7

WDWA0007E

Revision: January 2005 TF-17 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

Wiring Diagram -- TF -- EDS000Z8

WDWA0014E

Revision: January 2005 TF-18 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

WDWA0009E

Revision: January 2005 TF-19 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

WDWA0003E

Revision: January 2005 TF-20 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

WDWA0010E

Revision: January 2005 TF-21 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

WDWA0004E

Revision: January 2005 TF-22 2004 Pathfinder Armada
ALL-MODE 4WD SYSTEM

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