Nissan Pathfinder (2008 year). Manual - part 192

DLN-120

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HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

Description

INFOID:0000000001728434

This symptom occurs when the vehicle is accelerating in 4WD and the steering wheel is turned fully either
direction.  It may feel like a bump or being pushed from behind.  A small amount of this bumping feeling is
acceptable under certain road conditions.  The transfer case may be adjusted using the CONSULT-III to com-
pensate for this condition.

Diagnosis Procedure

INFOID:0000000001728435

DIAGNOSTIC PROCEDURE

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

malfunction.

• Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift

switch is 4H or 4LO, steering wheel is turned fully to either side.

1.

CHECK SYSTEM FOR CAN COMMUNICATION LINE

Perform self-diagnosis.  Refer to 

DLN-20, "CONSULT-III Function (ALL MODE AWD/4WD)"

.

Is CAN COMM CIRCUIT [U1000] displayed?

YES

>> Perform trouble diagnosis for CAN communication line.

NO

>> GO TO 2.

2.

CHECK SYSTEM FOR 4WD SHIFT SWITCH

Perform trouble diagnosis for 4WD shift switch system. Refer to 

DLN-34, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT

Perform self diagnosis for ECM.  Refer to 

EC-542, "CONSULT-III Function (ENGINE)"

.

Is any malfunction deteced by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 4.

4.

CHECK SYSTEM FOR CLUTCH PRESSURE SOLENOID

Perform trouble diagnosis for clutch pressure solenoid system. Refer to 

DLN-56, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

SYMPTOM CHECK

Check again.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> GO TO 6.

6.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-83, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 7.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

7.

CHECK TRANSFER INNER PARTS

1.

Disassemble transfer assembly. Refer to 

DLN-149, "Disassembly and Assembly"

.

2.

Check transfer inner parts.

HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS

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Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair or replace damaged parts.

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ATP SWITCH

ATP SWITCH

Description

INFOID:0000000001728436

The ATP indicator is ON when the transfer case is not in neutral.

Diagnosis Procedure

INFOID:0000000001728437

DIAGNOSTIC PROCEDURE

1.

CHECK ATP SWITCH SIGNAL

 With CONSULT-III

1.

Start engine.

2.

Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.

3.

Read out the value of ATP SWITCH.

 Without CONSULT-III

1.

Start engine.

2.

Check voltage between transfer control unit harness connector
terminal and ground.

Are inspection results normal?

YES 

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ATP SWITCH

1.

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

2.

Disconnect transfer control unit harness connector and the ATP switch harness connector.

3.

Check continuity between transfer control unit harness connec-
tor M153 terminal 40 and ATP switch harness connector F55
terminal 8.

Also check harness for short to ground and short to power.

Are inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK GROUND CIRCUIT

Condition

Display value

• Vehicle stopped
• Engine running
• A/T selector lever 

N

• Brake pedal de-

pressed

4WD shift switch
: 4H to 4LO or 4LO to 4H
(While actuator motor is operating.)

 ON

Except the above

OFF

Connector

Terminal

Condition

Voltage 

(Approx.)

M153

40 - 

Ground

• Vehicle stopped
• Engine running
• A/T selector lever 

N

• Brake pedal de-

pressed

4WD shift switch: 4H 
to 4LO or 4LO to 4H
(While actuator motor 
is operating.)

0V

Except the above

Battery 
voltage

SDIA2755E

Continuity should exist.

SDIA2756E

ATP SWITCH

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1.

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

2.

Disconnect ATP switch harness connector.

3.

Check continuity between ATP switch harness connector F55
terminal 9 and ground.

Also check harness for short to ground and short to power.

Are inspection results normal?

YES 

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power

in harness or connectors.

4.

CHECK ATP SWITCH 

1.

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

2.

Disconnect ATP switch harness connector.

3.

Remove ATP switch. Refer to 

DLN-18, "Component Parts Location"

.

4.

Push and release ATP switch and check continuity between ATP
switch terminals 8 and 9.

Are inspection results normal?

YES

>> GO TO 5.

NO

>> Replace ATP switch.

5.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-83, "Reference Value"

.

Are inspection results normal?

YES

>> GO TO 6.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

6.

CHECK ATP WARNING LAMP

1.

Turn ignition switch ON.  (Do not start engine.)

2.

Move A/T selector lever to P position.

3.

Set 4WD shift switch from 4H to 4LO or 4LO to 4H.

Does ATP warning lamp turn ON while switching?

YES

>> Inspection End.

NO

>> GO TO 

DLN-115, "Diagnosis Procedure"

.

Continuity should exist.

SDIA2394E

Terminal

Condition

Continuity

8 - 9

Push ATP switch

Yes

Release ATP switch

No

SDIA2757E

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4WD SYSTEM DOES NOT OPERATE

4WD SYSTEM DOES NOT OPERATE

Description

INFOID:0000000001728438

The vehicle can not be put into 4WD mode.  (Possible hydraulic malfunction)

Diagnosis Procedure

INFOID:0000000001728439

1.

CHECK SYSTEM FOR 4WD SHIFT SWITCH

Perform trouble diagnosis for 4WD shift switch system. Refer to 

DLN-34, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK SYSTEM FOR CLUTCH PRESSURE SWITCH

Perform trouble diagnosis for clutch pressure switch system. Refer to 

DLN-73, "Diagnosis Procedure"

.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

SYMPTOM CHECK

Check again.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> GO TO 4.

4.

CHECK TRANSFER CONTROL UNIT

 Check transfer control unit input/output signal. Refer to 

DLN-83, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 5.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

5.

CHECK TRANSFER INNER PARTS

1.

Disassemble transfer assembly. Refer to 

DLN-149, "Disassembly and Assembly"

.

2.

Check transfer inner parts.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Repair or replace damaged parts.

PRECAUTIONS

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PRECAUTION

PRECAUTIONS

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

INFOID:0000000001728441

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 SR and SB section of this Service Man-
ual.

WARNING:

• 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 performed by
an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.

• 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 har-
ness connectors.

Precaution for Transfer Assembly and Transfer Control Unit Replacement

INFOID:0000000001728442

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 approximately 1 second.

• If OK, the position between transfer assembly and transfer control unit is correct.
• If NG, the position is different between transfer assembly and transfer control unit.

Adjust the position between transfer assembly and transfer control unit. See METHOD FOR POSITION
ADJUSTMENT that follows.

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 

DLN-20, "CONSULT-III Function (ALL MODE AWD/4WD)"

.

7.

Check 4WD shift indicator lamp. Refer to 

DLN-9, "Preliminary Check"

.

If 4WD shift indicator lamp does not indicate 2WD, install new transfer control unit and retry the above
check.

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< PRECAUTION >

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PRECAUTIONS

Precaution

INFOID:0000000001728443

• Before connecting or disconnecting the transfer control unit

harness connector, turn ignition switch “OFF” and disconnect
battery cables. Failure to do so may damage the transfer con-
trol unit. Battery voltage is applied to transfer control unit
even if ignition switch is turned “OFF”.

• When connecting or disconnecting pin connectors into or

from transfer control unit, take care not to damage pin termi-
nals (bend or break).
When connecting pin connectors make sure that there are not
any bends or breaks on transfer control unit pin terminals.

• Before replacing transfer control unit, perform transfer con-

trol unit input/output signal inspection and make sure transfer
control unit functions properly. Refer to 

DLN-83, "Reference

Value"

.

Service Notice

INFOID:0000000001728444

• After overhaul refill the transfer with new transfer fluid.
• Check the fluid level or replace the fluid only with the vehicle parked on level ground.
• During removal or installation, keep inside of transfer clear of dust or dirt.
• Disassembly should be done in a clean work area.
• 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.

• Check for the correct installation status prior to removal or disassembly. If matchmarks are required, be cer-

tain they do not interfere with the function of the parts when applied. 

• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or

reassembly.

• Check appearance of the disassembled parts for damage, deformation, and unusual wear. Replace them

with new ones if necessary.

• Gaskets, seals and O-rings should be replaced any time the transfer is disassembled.
• In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to outside. If tight-

ening sequence is specified, use it.

• Observe the specified torque when assembling.
• Clean and flush the parts sufficiently and blow-dry them.
• Be careful not to damage sliding surfaces and mating surfaces.

SEF289H

SEF291H

MEF040DB

PRECAUTIONS

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• 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.