Nissan Pathfinder (2008 year). Manual - part 180

DLN-24

< FUNCTION DIAGNOSIS >

[TRANSFER: ATX14B]

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

INFOID:0000000001282210

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-132

DLN-149

DLN-149

DLN-149

DLN-149

SUSPECTED PARTS
(Possible cause)

T

R

ANSFER F

L

UID (Level

 low)

T

R

ANSFER F

L

UID (W

rong)

T

R

ANSFER F

L

UID (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 

FORK

 (W

orn

 or d

a

m

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

P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT

DLN-25

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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O

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COMPONENT DIAGNOSIS

P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT

Description

INFOID:0000000001728338

Power supply to transfer control unit is abnormally low while driving.

DTC Logic

INFOID:0000000001728339

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1811 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-25, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728340

1.

CHECK POWER SUPPLY 

1.

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

2.

Connect transfer control unit harness connector.

3.

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

4.

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

5.

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

OK or NG

OK

>> GO TO 2.

NG

>>

Check the following. If any items are damaged, repair or replace damaged parts.

• 10A fuses [No. 21 located in fuse block (J/B)] and No. 59 (located in the fuse and relay box).

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1811]

BATTERY VOLTAGE

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

Refer to 

DLN-25

.

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

0V

22 - Ground

M153

29 - Ground 

30 - Ground

Battery voltage

47 - Ground

WDIA0165E

Connector

Terminal

Voltage (Approx.)

M152

16 - Ground

Battery voltage

22 - Ground

M153

29 - Ground 

30 - Ground

0V

47 - Ground

Battery voltage

WDIA0166E

DLN-26

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT

• Harness for short or open between battery and transfer control unit harness connector M153

terminals 47.

• Harness for short or open between ignition switch and transfer control unit harness connector

M153 terminal 29.

• Harness for short or open between battery and transfer shut off relay harness connector E155

terminal 1 and 3.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 2

and transfer control unit harness connector M153 terminal 30.

• Harness for short or open between transfer shut off relay harness connector E155 terminal 5

and transfer control unit harness connector M152 terminals 16 and 22.

• Battery and ignition switch.
• Transfer shut off relay. Refer to 

DLN-26, "Component Inspection"

.

2.

CHECK GROUND CIRCUIT

1.

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

2.

Disconnect transfer control unit harness connector.

3.

Check continuity between transfer control unit harness connec-
tor M152 terminals 3, 6, M153 terminal 45 and ground.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to power in harness or con-

nectors.

3.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-83, "Reference Value"

.

OK or NG

OK

>> GO TO 4.

NG

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

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

4.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.

OK or NG

OK

>> Inspection End.

NG

>> Replace transfer control unit. Refer to 

DLN-135, "Removal and Installation"

.

Component Inspection

INFOID:0000000001728341

1.

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

2.

Remove transfer shut off relay. Refer to 

DLN-18, "Component Parts Location"

.

3.

Apply 12V direct current between transfer shut off relay termi-
nals 1 and 2.

4.

Check continuity between relay terminals 3 and 5.

5.

If inspection results are abnormal replace the transfer shut off
relay.

Continuity should exist.

SDIA2691E

Condition

Continuity

12V direct current supply between terminals 1 and 2

Yes

OFF

No

SCIA1245E

P1802 – P1804, P1809 TRANSFER CONTROL UNIT

DLN-27

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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P1802 – P1804, P1809 TRANSFER CONTROL UNIT

Description

INFOID:0000000001728342

The transfer control unit controls the transfer control device which controls shifts between AUTO, 4H and 4LO
and between 2WD and 4WD.  A DTC may set when any of the following occur:
• Malfunction is detected in the memory (RAM) system of transfer control unit.
• Malfunction is detected in the memory (ROM) system of transfer control unit.
• Malfunction is detected in the memory (EEPROM) system of transfer control unit.
• AD converter system of transfer control unit is malfunctioning.

DTC Logic

INFOID:0000000001728343

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Are DTC's P1802 - P1804 or P1809 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-27, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728344

1.

INSPECTION START

Do you have CONSULT-III?

YES or NO

YES

>> GO TO 2.

NO

>> GO TO 3.

2.

PERFORM SELF-DIAGNOSIS (WITH CONSULT-III)

 With CONSULT-III

1.

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

2.

Select SELF-DIAG RESULTS mode for ALL MODE AWD/4WD with CONSULT-III.

3.

Touch ERASE.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Perform the self-diagnosis again.

Is the CONTROL UNIT 1 [P1802], CONTROL UNIT 2 [P1803], CONTROL UNIT 3 [P1804] or CONTROL
UNIT 4 [P1809] displayed?

YES

>> Replace transfer control unit. Refer to 

DLN-135, "Removal and Installation"

.

NO

>> Inspection End.

3.

PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT-III)

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1802]

CONTROL UNIT 1

Malfunction is detected in the memory 
(RAM) system of transfer control unit.

Refer to 

DLN-27

.

[P1803]

CONTROL UNIT 2

Malfunction is detected in the memory 
(ROM) system of transfer control unit.

[P1804]

CONTROL UNIT 3

Malfunction is detected in the memory 
(EEPROM) system of transfer control 
unit.

[P1809]

CONTROL UNIT 4

AD converter system of transfer control 
unit is malfunctioning.

DLN-28

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1802 – P1804, P1809 TRANSFER CONTROL UNIT

 Without CONSULT-III

1.

Perform the self-diagnosis and then erase self-diagnostic results. Refer to 

DLN-20, "CONSULT-III Func-

tion (ALL MODE AWD/4WD)"

.

2.

Perform the self-diagnosis again.

Do the self-diagnostic results indicate AD converter?

YES

>> Replace transfer control unit.

NO

>> Inspection End.

P1807 VEHICLE SPEED SENSOR (A/T)

DLN-29

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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P1807 VEHICLE SPEED SENSOR (A/T)

Description

INFOID:0000000001728345

The transmission control module (TCM) transmits the output shaft revolution signal via CAN communication to
Transfer control unit.  DTC P1807 will set when a malfunction is detected in the output shaft revolution signal
or an improper signal is input while driving.

DTC Logic

INFOID:0000000001728346

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1807 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-29, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728347

1.

CHECK DTC WITH TCM

Perform self-diagnosis with TCM. Refer to 

TM-35, "CONSULT-III Function (TRANSMISSION)"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

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 3.

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.

3.

CHECK DTC

Drive the vehicle and then perform self-diagnosis.
Are the inspection results normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis with TCM again.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1807]

VHCL SPEED SEN·AT

• Malfunction is detected in output shaft 

revolution signal that is output from 
TCM through CAN communication.

• Improper signal is input while driving.

Refer to 

DLN-29

.

DLN-30

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1808 VEHICLE SPEED SENSOR (ABS)

P1808 VEHICLE SPEED SENSOR (ABS)

Description

INFOID:0000000001728348

The ABS actuator and electric unit (control unit) transmits a vehicle speed signal via CAN communication to
the transfer control unit.  DTC P1808 sets when a malfunction is detected in the vehicle speed signal that is
output from the ABS actuator and electric unit (control unit) or an improper signal is input while driving.

DTC Logic

INFOID:0000000001728349

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1808 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-30, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728350

1.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to 

BRC-141, "CONSULT-III

Function (ABS)"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

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 3.

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.

3.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.

Are the inspection results normal?

YES

>> Inspection End.

NO

>> Perform self-diagnosis with ABS actuator and electric unit (control unit) again.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1808]

VHCL SPEED SEN·ABS

• Malfunction is detected in vehicle 

speed signal that is output from ABS 
actuator and electric unit (control unit) 
through CAN communication.

• Improper signal is input while driving.

Refer to 

DLN-30

.

P1810 NEUTRAL-4LO SWITCH

DLN-31

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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P1810 NEUTRAL-4LO SWITCH

Description

INFOID:0000000001728351

The neutral-4LO switch detects that the transfer case is in neutral or 4LO range.  DTC P1810 will set when an
improper signal from the neutral-4LO switch is input due to an open or short circuit.

DTC Logic

INFOID:0000000001728352

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1810 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-31, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728353

1.

CHECK 4LO POSITION 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 N POSI SW TF.

 Without CONSULT-III

1.

Start engine.

2.

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

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1810]

4L POSI SW TF

Improper signal from neutral-4LO switch 
is input due to open or short circuit.

Refer to 

DLN-31

.

Condition

Display value

• Vehicle stopped
• Engine running
• A/T selector lever N position
• Brake pedal depressed

4WD shift switch: 2WD, 
AUTO or 4H

OFF

4WD shift switch: 4H to 
4LO (While actuator mo-
tor is operating.)

OFF 

→

 ON

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

ON 

→

 OFF

4WD shift switch: 4LO

ON

SDIA2693E