Nissan Pathfinder (2008 year). Manual - part 201

DLN-192

< FUNCTION DIAGNOSIS >

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4WD SYSTEM

4LO Indicator Lamp

• Displays 4LO while engine is running.  4LO indicator lamp flashes if transfer gear does not shift completely

into 4H

⇔

4LO. In this condition, the transfer case may be in neutral and the A/T parking mechanism may not

operate.

• Turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1 sec-

ond after the engine starts if system is normal.

4WD WARNING LAMP

Turns on or flashes when there is a malfunction in 4WD system.
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.

4WD Warning Lamp Indication

ATP WARNING LAMP

When the A/T selector lever is in “P” position, the vehicle may move if the transfer case is in neutral.  ATP
warning lamp is turned on to indicate this condition to the driver.

Condition

4WD warning lamp

System normal

OFF

Lamp check

Turns ON when ignition switch is turned ON.

Turns OFF after engine start.

4WD system malfunction

ON

During self-diagnosis

Flashes malfunction mode.

Large difference in diameter of front/
rear tires

Flashes slow (1 flash / 2 seconds)

(Continues to flash until the ignition switch is turned OFF)

4WD SYSTEM

DLN-193

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Component Parts Location

INFOID:0000000001499967

1.

Fuse and relay box
A: Transfer shut off relay 1 E156
B: Transfer shift high relay E46
C: Transfer shift low relay E47
D: Transfer shut off relay 2 E157

2.

A: ATP switch F55
B: 4 LO switch F60
(View with front propeller shaft re-
moved.)

3.

Wait detection switch F59

WDIA0337E

DLN-194

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4WD SYSTEM

CAN Communication

INFOID:0000000001499968

Refer to 

LAN-64, "DTC Index"

.

Cross-Sectional View

INFOID:0000000001282282

4.

Transfer control device F58

5.

Transfer control unit M152, M153
(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 M141

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

4WD SYSTEM

DLN-195

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Power Transfer

INFOID:0000000001282283

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

DLN-196

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4WD SYSTEM

SDIA2213E

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

DLN-197

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DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

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

INFOID:0000000001499970

FUNCTION

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

SELF-DIAG 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-245, "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-249, "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.

ALL MODE AWD/4WD diagnostic mode

Description

SELF-DIAG RESULTS

Displays transfer control unit self-diagnosis results.

DATA MONITOR

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

CAN DIAG SUPPORT MNTR

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

ECU PART NUMBER

Transfer control unit part number can be read.

DLN-198

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DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

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 MON 1 [ON/OFF]

–

–

×

Check signal for transfer control unit signal 
output

SHIFT ACT 2 [ON/OFF]

–

×

×

Output condition to actuator motor (coun-
terclockwise)

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)

DLN-199

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SHIFT AC MON 2 [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 SW 1 [ON/OFF]

×

–

×

Condition of actuator position switch 1

SHIFT POS SW 2 [ON/OFF]

×

–

×

Condition of actuator position switch 2

SHIFT POS SW 3 [ON/OFF]

×

–

×

Condition of actuator position switch 3

SHIFT POS SW 4 [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