Nissan Pathfinder (2010 year). Manual - part 203

4WD SYSTEM

DLN-197

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

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N

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CAN Communication

INFOID:0000000005258363

Refer to 

LAN-60, "DTC Index"

.

Cross-Sectional View

INFOID:0000000005258364

4.

Transfer control device F72

5.

Transfer control unit M165, M166
(View with lower instrument cover re-
moved.)

6.

Combination meter M24
A: 4WD warning lamp
B: 4LO indicator lamp
C: 4WD shift indicator lamp
D: ATP warning lamp

7.

4WD shift switch M138

1.

Mainshaft

2.

Rear case

3.

Oil pump assembly

4.

Clutch gear

5.

2-4 shift fork

6.

2-4 sleeve

7.

Drive chain

8.

Sprocket

9.

L-H shift fork

10. L-H sleeve

11. Internal gear

12. Front case

13. Planetary carrier assembly

14. Sun gear assembly

15. L-H shift rod

16. Control shift rod

17. Companion flange

18. Front drive shaft

19. Transfer control device

WDIA0222E

2010 Pathfinder

DLN-198

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

4WD SYSTEM

Power Transfer

INFOID:0000000005258365

POWER TRANSFER DIAGRAM

POWER TRANSFER FLOW

1.

Mainshaft

2.

Clutch gear

3.

2-4 sleeve

4.

Drive chain

5.

Sprocket

6.

L-H sleeve

7.

Planetary carrier assembly

8.

Sun gear assembly

9.

Front drive shaft

WDIA0223E

2010 Pathfinder

4WD SYSTEM

DLN-199

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

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DLN

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SDIA2213E

2010 Pathfinder

DLN-200

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

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

INFOID:0000000005258366

FUNCTION

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

SELF DIAGNOSTIC RESULT MODE

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 something wrong with 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 problem, start

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

flickering according to the self-diagnostic results.  Refer to 

DLN-247, "DTC Index"

.

Diagnostic Procedure

1. Warn up engine.
2. Turn ignition switch “ON” and “OFF” at least twice, and then turn ignition switch “OFF”.
3. Move A/T selector lever to “P” position.
4. Turn 4WD shift switch to “2WD” position.
5. Turn ignition switch “ON”. (Do not start engine.)
6. 4WD warning lamp ON.

If 4WD warning lamp does not turn ON, refer to 

DLN-251, "Diagnosis Procedure"

.

7. Move A/T selector lever to “R” position.
8. Turn 4WD shift switch to “2WD”, “4H” and “2WD” in order.
9. Move A/T selector lever to “P” position.
10. Turn 4WD shift switch to “4H”, “2WD” and “4H” in order.
11. Move A/T selector lever to “N” position.
12. Turn 4WD shift switch to “2WD” position.
13. Move A/T selector lever to “P” position.

Diagnostic Mode

Description

Self Diagnostic Result

Displays transfer control unit self-diagnosis results.

Data Monitor

Displays transfer control unit input/output data in real time.

CAN Diag Support Monitor

The results of transmit/receive diagnosis of CAN communication can be read.

ECU Identification

Transfer control unit part number can be read.

2010 Pathfinder

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

DLN-201

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

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14. Read the flickering of 4WD warning lamp.

Self-diagnosis example

DATA MONITOR MODE

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.

Display Item List

×

: Standard –: Not applicable

PDIA0227E

Monitored item (Unit)

Monitor item selection

Remarks

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 is displayed.
Signal input with CAN communication line.

BATTERY VOLT [V]

×

–

×

Power supply voltage for transfer control 
unit.

2WD SWITCH [On/Off]

×

–

×

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

4H SWITCH [On/Off]

×

–

×

4L SWITCH [On/Off]

×

–

×

4L POSI SW [On/Off]

×

–

×

4LO switch signal status is displayed.

ATP SWITCH [On/Off]

×

–

×

ATP switch signal status is displayed.

WAIT DETCT SW [On/Off]

×

–

×

Wait detection switch signal status is dis-
played.

4WD MODE [2H/4H/4L]

–

×

×

Control status of 4WD recognized by trans-
fer control unit. (2WD, 4H or 4LO)

VHCL/S COMP [km/h] or [mph]

–

×

×

Vehicle speed recognized by transfer con-
trol unit.

SHIFT ACT 1 [On/Off]

–

×

×

Output condition to actuator motor (clock-
wise)

SHIFT AC MON1 [On/Off]

–

–

×

Check signal for transfer control unit signal 
output

SHIFT ACT 2 [On/Off]

–

×

×

Output condition to actuator motor (coun-
terclockwise)

2010 Pathfinder

DLN-202

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

SHIFT AC MON2 [On/Off]

–

–

×

Check signal for transfer control unit signal 
output

SFT ACT/R MON [On/Off]

–

–

×

Operating condition of actuator motor relay 
(integrated in transfer control unit)

SHIFT POS SW1 [On/Off]

×

–

×

Condition of actuator position switch 1

SHIFT POS SW2 [On/Off]

×

–

×

Condition of actuator position switch 2

SHIFT POS SW3 [On/Off]

×

–

×

Condition of actuator position switch 3

SHIFT POS SW4 [On/Off]

×

–

×

Condition of actuator position switch 4

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 
(rear) is displayed.

4H IND [On/Off]

–

–

×

Control status of 4WD shift indicator lamp 
(front and center) is displayed.

4L IND [On/Off]

–

–

×

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

Monitored item (Unit)

Monitor item selection

Remarks

ECU INPUT 

SIGNALS

MAIN

SIGNALS

SELECTION 

FROM MENU

2010 Pathfinder

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

DLN-203

< FUNCTION DIAGNOSIS >

[TRANSFER: TX15B]

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NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

INFOID:0000000005258367

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.

Reference page

DLN-271

DLN-283

DLN-307

DLN-283

DLN-301

SUSPECTED PARTS
(Possible cause)

T

R

ANSFER F

LUID (Level

 low)

T

R

ANSFER F

LUID (W

rong)

T

R

ANSFER F

LUID (Level

 too high)

LI

QUI

D

 GASKET (Dam

ag

ed

)

O-RI

NG (W

orn

 or da

ma

ge

d)

OIL

 SEAL

 (W

orn

 or da

ma

ge

d)

S

H

IFT 

FO

RK

 (W

orn

 or d

am

a

ged

)

GEAR (W

orn

 o

r da

ma

ge

d)

B

EARING

 (W

orn

 or 

da

ma

ge

d)

Symptom

Noise

1

2

3

3

Transfer  fluid  leakage

3

1

2

2

2

Hard to shift or will not shift

1

1

2

2010 Pathfinder

DLN-204

< COMPONENT DIAGNOSIS >

[TRANSFER: TX15B]

P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT

COMPONENT DIAGNOSIS

P1801, P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL
UNIT

Description

INFOID:0000000005258368

The transfer control unit controls the transfer control device which controls shifts between 4H and 4LO and

between 2WD and 4WD.  When the vehicle battery is removed, the power supply to the transfer control unit is

interrupted, and self-diagnosis memory function is suspended.  These DTC's may also set when the power

supply voltage for the transfer control unit is abnormally low while driving.

DTC Logic

INFOID:0000000005258369

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Are DTC's “P1801 or P1811 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-204, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005258370

Regarding Wiring Diagram information, refer to 

DLN-240, "Wiring Diagram - PART TIME 4WD SYSTEM -"

.

1.

CHECK POWER SUPPLY

1. Turn ignition switch “OFF”.  (Stay for at least 5 seconds.)

2. Disconnect transfer control unit harness connector.

3. Check voltage between transfer control unit harness connector

terminals and ground.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1801]

*INITIAL START*

Due to removal of battery which cuts off 
power supply to transfer control unit, 
self-diagnosis memory function is sus-
pended.

DLN-204

[P1811]

BATTERY VOLTAGE

Power supply voltage for transfer control 
unit is abnormally low while driving.

Connector

Terminal

Voltage (Approx.)

M165

19 - Ground

Battery voltage

25 - Ground

0V

M166

40 - Ground

Battery voltage

44 - Ground

0V

45 - Ground

SDIA3360E

2010 Pathfinder