Nissan Pathfinder (2011 year). Manual - part 185

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

4WD SYSTEM

TRANSFER FLUID TEMPERATURE SENSOR

The transfer fluid temperature sensor detects the transfer fluid temperature and sends a signal to the transfer

control unit.

TRANSFER MOTOR

• 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.

• The main oil pump is operated by the driving force of the mainshaft. In other words, sufficient oil pressure

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 sub-oil

pump to compensate for insufficient oil pressure.

• The transfer motor operates as follows:

- The motor relay turns OFF in the 2WD mode.

- The motor relay operates as described in the table below in modes other than the 2WD mode.

• 4WD shift switch, transmission range switch, Neutral-4LO switch, vehicle speed sensor and throttle position

sensor are used in conjunction with the transfer motor.

Transfer Motor Relay Operation

*: After 2.5 seconds have elapsed.

CLUTCH PRESSURE SOLENOID VALVE

The clutch pressure solenoid valve distributes front and rear torque in AUTO 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. 

TRANSFER CONTROL DEVICE

Integrates actuator motor and actuator position switch.

4WD shift switch

A/T selector lever position

Vehicle speed

(VSS)

Accelerator pedal position

Motor relay drive 

command

2WD

—

—

—

OFF

4H (LOCK) and 4LO

N position

0

—

 ON

P position

0

0 - 0.07/8

OFF*

0.07/8 - 1/8

 HOLD

1/8 - MAX

 ON

Other than R position

0 < VSS 

≤

 50 km/h (31 MPH)

—

 ON

50 km/h (31 MPH) < VSS < 55 

km/h (34 MPH)

 HOLD

55 km/h (34 MPH) 

≤

 VSS

OFF

R position

—

—

 ON

R position

—

—

 ON

AUTO

P or N position

0

0 - 0.07/8

OFF*

0.07/8 - 1/8

 HOLD

1/8 - MAX

 ON

0 < VSS 

≤

 50 km/h (31 MPH)

—

 ON

50 km/h (31 MPH) < VSS < 55 

km/h (34 MPH)

 HOLD

55 km/h (34 MPH) 

≤

 VSS

OFF

Other than R, P and N posi-
tion

0 < VSS 

≤

 50 km/h (31 MPH)

—

 ON

50 km/h (31 MPH) < VSS < 55 

km/h (34 MPH)

 HOLD

55 km/h (34 MPH) 

≤

 VSS

OFF

2011 Pathfinder

4WD SYSTEM

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

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Actuator Motor

Moves shift rods when signaled by transfer control unit.

Actuator Position Switch

Detects actuator motor position and then sends signal to transfer control unit.

Component Parts Location

INFOID:0000000006244922

WDIA0124E

2011 Pathfinder

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

4WD SYSTEM

CAN Communication

INFOID:0000000006244923

Refer to 

LAN-52, "CAN System Specification Chart"

.

Cross-Sectional View

INFOID:0000000006244924

Power Transfer

INFOID:0000000006244925

POWER TRANSFER DIAGRAM

1.

Center case

2.

Front case

3.

Internal gear

4.

Planetary carrier assembly

5.

Sun gear assembly

6.

Main shaft

7.

L-H sleeve

8.

L-H fork

9.

Shift rod

10. 2-4 sleeve

11. 2-4 fork

12. Drive chain

13. Front drive shaft

14. Control valve assembly

15. Transfer motor

16. Rear case

17. Clutch piston

18. Press flange

19. Multiple disc clutch

20. Clutch hub assembly

21. Clutch drum assembly

WDIA0202E

2011 Pathfinder

4WD SYSTEM

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

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POWER TRANSFER FLOW

1.

Center case

2.

Chain

3.

Multiple disc clutch

4.

Rear case

5.

Mainshaft

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

LDIA0053E

2011 Pathfinder

DLN-22

< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

4WD SYSTEM

SDIA3327E

2011 Pathfinder

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

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DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

CONSULT-III Function (ALL MODE AWD/4WD)

INFOID:0000000006244926

FUNCTION

CONSULT-III can display each diagnostic item using the following direct diagnostic modes.

SELF DIAGNOSTIC RESULT

Operation Procedure

1. Connect CONSULT-III.
2. With engine at idle, touch SELF-DIAG RESULTS.

Display shows malfunction experienced since the last erasing operation.

NOTE:

The details for TIME are as follows:

• 0: Error currently detected with transfer control unit.

• Except for 0: Error detected in the past and memorized with transfer control unit.

Detects frequency of driving after DTC occurs (frequency of turning ignition switch ON/OFF).

How to Erase Self-diagnostic Results

1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine and select SELF-DIAG RESULTS mode for ALL MODE AWD/4WD with CONSULT-III.
3. Touch ERASE on CONSULT-III screen to erase DTC memory.

CAUTION:

If memory cannot be erased, perform applicable diagnosis.

 SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-III)

Description

If the engine starts when there is a malfunction in the 4WD system, the 4WD warning lamp turns ON or flickers

in the combination meter. When the system functions properly, the warning lamp turns ON when the ignition

switch is turned to ON, and it turns OFF after engine starts. To locate the cause of a malfunction, start the self-

diagnosis function. The 4WD warning lamp in the combination meter will indicate the malfunction area by

flashing according to the self-diagnostic results.  Refer to 

DLN-95, "DTC Index"

.

Diagnostic Procedure

1. Warn up engine. 
2. Move A/T selector lever to P position.
3. Turn 4WD shift switch to 2WD position.
4. Turn ignition switch ON and OFF at least twice, and then turn ignition switch OFF.
5. Turn 4WD shift switch to AUTO position.
6. Turn ignition switch ON. (Do not start engine.)
7. 4WD warning lamp ON.
8. Move A/T selector lever to R position.
9. Turn 4WD shift switch to 2WD, AUTO and 2WD in order.
10. Move A/T selector lever to D position.
11. Turn 4WD shift switch to 4H, AUTO and 4H in order.
12. Move A/T selector lever to N position.
13. Turn 4WD shift switch to AUTO position.

Direct Diagnostic Mode

Description

ECU Identification

The transfer control unit part number is displayed.

Self Diagnostic Result

The transfer control unit self diagnostic results are displayed.

Data Monitor

The transfer control unit input/output data is displayed in real time.

Work support

The settings for transfer control unit functions can be changed.

CAN Diag Support Monitor

The result of transmit/receive diagnosis of CAN communication is diplayed.

2011 Pathfinder

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

14. Move A/T selector lever to P position.
15. Read the flickering of 4WD warning lamp.

Self-diagnosis example

ERASE SELF-DIAGNOSIS

• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is

stored into the control unit as necessary during use by the user. This memory is not erased no matter how

many times the ignition switch is turned ON and OFF.

• However, this information is erased by turning ignition switch OFF after performing self-diagnostics or by

erasing the memory using the CONSULT-III.

DATA MONITOR

Operation Procedure

1. Connect CONSULT-III.
2. Touch DATA MONITOR.
3. Select from SELECT MONITOR ITEM, screen of data monitor mode is displayed.

NOTE:

When malfunction is detected, CONSULT-III performs REAL-TIME DIAGNOSIS.

Also, any malfunction detected while in this mode will be displayed at real time.

×

: Standard –: Not applicable

PDIA0227E

Monitor Item (Unit)

Selection

Description

ECU INPUT 

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

VHCL/S SEN·FR [km/h] or [mph]

×

–

×

Wheel speed calculated by ABS actuator and 
electric unit (control unit).
Signal input with CAN communication line.

VHCL/S SEN·RR [km/h] or [mph]

×

–

×

Wheel speed calculated by TCM.
Signal input with CAN communication line.

ENGINE SPEED [rpm]

×

–

×

Engine speed calculated by ECM.
Signal input with CAN communication line.

THRTL POS SEN [0.0/8]

×

–

×

Accelerator pedal position (APP) sensor sta-
tus is displayed.
Signal input with CAN communication line.

FLUID TEMP SE [V]

×

–

×

Transfer fluid temperature sensor signal volt-
age is displayed.

BATTERY VOLT [V]

×

–

×

Power supply voltage for transfer control unit.

2WD SWITCH [On/Off]

×

–

×

4WD shift switch status is displayed.

AUTO SWITCH [On/Off]

×

–

×

4WD shift switch status is displayed.

LOCK SWITCH [On/Off]

×

–

×

4WD shift switch status is displayed.
(LOCK means 4H of 4WD shift switch.)

4L SWITCH [On/Off]

×

–

×

4WD shift switch status is displayed.
(4L means 4LO of 4WD shift switch.)

N POSI SW TF [On/Off]

×

–

×

Neutral-4LO switch signal status is displayed.

2011 Pathfinder

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

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< SYSTEM DESCRIPTION >

[TRANSFER: ATX14B]

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ATP SWITCH [On/Off]

×

–

×

ATP switch signal status is displayed.

WAIT DETCT SW [On/Off]

×

–

×

Wait detection switch status is displayed.

LINE PRES SW [On/Off]

×

–

×

Line pressure switch status is displayed.

CL PRES SW [On/Off]

×

–

×

Clutch pressure switch status is displayed.

N POSI SW AT [On/Off]

×

–

×

N position signal of transmission range switch 
status is displayed.
Signal input with CAN communication line.

R POSI SW AT [On/Off]

×

–

×

R position signal of transmission range switch 
status is displayed.
Signal input with CAN communication line.

P POSI SW AT [On/Off]

×

–

×

P position signal of transmission range switch 
status is displayed.
Signal input with CAN communication line.

ABS OPER SW [On/Off]

×

–

×

ABS operation signal status is displayed.
Signal input with CAN communication line.

VDC OPER SW [On/Off]

×

–

×

VDC operation signal status is displayed.
Signal input with CAN communication line.

TCS OPER SW [On/Off]

×

–

×

TCS operation signal status is displayed.
Signal input with CAN communication line.

THROTTLE POSI [0.0/8]

–

×

×

Throttle position status is displayed.
Signal input with CAN communication line.

4WD MODE [AUTO/LOCK/2WD/4L]

–

×

×

Control status of 4WD recognized by transfer 
control unit. (AUTO, 4H, 2WD or 4LO)

VHCL/S COMP [km/h] or [mph]

–

×

×

Vehicle speed recognized by transfer control 
unit.

COMP CL TORQ [kgm]

–

×

×

Calculated torque recognized by transfer con-
trol unit.

DUTY SOLENOID [%]

–

×

×

Control value of clutch pressure solenoid.

2-4WD SOL [On/Off]

–

×

×

Output condition to 2-4WD solenoid.

2-4WD SOL MON [On/Off]

–

–

×

Check signal for transfer control unit signal 
output.

MOTOR RELAY [On/Off]

–

×

×

Transfer motor relay signal status is dis-
played.

MOTOR RLY MON [On/Off]

–

–

×

Check signal for transfer control unit signal 
output.

4WD FAIL LAMP [On/Off]

–

×

×

Control status of 4WD warning lamp is dis-
played.

2WD IND [On/Off]

–

–

×

Control status of 4WD shift indicator lamp 
(2WD indicator lamp) is displayed.

AUTO IND [On/Off]

–

–

×

Control status of 4WD shift indicator lamp 
(2WD and AUTO indicator lamp) is displayed.

LOCK IND [On/Off]

–

–

×

Control status of 4WD shift indicator lamp 
(2WD, AUTO and Lock indicator) is displayed.

4L IND [On/Off]

–

–

×

Control status of 4LO indicator lamp is dis-
played.

ATP IND [On/Off]

–

–

×

Control status of ATP warning lamp is dis-
played.

SHIFT POS SW1 [On/Off]

×

–

×

Actuator position switch 1 (Low) signal status 
is displayed.

Monitor Item (Unit)

Selection

Description

ECU INPUT 

SIGNALS

MAIN

SIGNALS

SELECTION

FROM MENU

2011 Pathfinder