Nissan Pathfinder (2008 year). Manual - part 181

DLN-32

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1810 NEUTRAL-4LO SWITCH

Are inspection results normal?

YES 

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND NEUTRAL-4LO SWITCH

1.

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

2.

Disconnect transfer control unit harness connector and the neutral-4LO switch harness connector.

3.

Check continuity between transfer control unit harness connec-
tor M153 terminal 25 and neutral-4LO switch harness connector
F60 terminal 13.

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

1.

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

2.

Disconnect neutral-4LO switch harness connector.

3.

Check continuity between neutral-4LO switch harness connec-
tor F60 terminal 12 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 4LO SWITCH 

1.

Turn ignition switch OFF.

2.

Disconnect neutral-4LO switch harness connector.

3.

Remove neutral-4LO switch.

Connector

Terminal 

(Wire col-

or)

Condition

Voltage 

(Approx.)

M153

 25 - 

Ground

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

N position

• Brake pedal de-

pressed

4WD shift switch: 
2WD, AUTO or 4H

Battery 
voltage

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

Battery 
voltage 

→

 0V

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

0V 

→

 

Battery 
voltage

4WD shift switch: 4LO

 0V

Continuity should exist.

SDIA2694E

Continuity should exist.

SDIA2695E

P1810 NEUTRAL-4LO SWITCH

DLN-33

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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DLN

N

O

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4.

Push and release neutral-4LO switch and check continuity
between neutral-4LO switch terminals 12 and 13.

Are inspection results normal?

YES

>> GO TO 5.

NO

>> Replace neutral-4LO switch. Refer to 

DLN-18, "Compo-

nent Parts Location"

.

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 DTC

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

YES

>> Inspection End.

NO

>> Replace transfer control unit. Refer to 

DLN-135, "Removal and Installation"

.

Component Inspection

INFOID:0000000001728354

1.

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

2.

Disconnect neutral-4LO switch harness connector.

3.

Remove neutral-4LO switch. Refer to 

DLN-18, "Component Parts Location"

.

4.

Push and release neutral-4LO switch and check continuity
between neutral-4LO switch terminals 12 and 13.

5.

If the inspection results are abnormal replace the neutral-4LO
switch.

Terminal

Condition

Continuity

12 - 13

Push neutral-4LO switch

Yes

Release neutral-4LO switch

No

SDIA2696E

Terminal

Condition

Continuity

12 - 13

Push neutral-4LO switch

Yes

Release neutral-4LO switch

No

SDIA2696E

DLN-34

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1813 4WD SHIFT SWITCH

P1813 4WD SHIFT SWITCH

Description

INFOID:0000000001728355

The 4WD shift switch allows the driver to select AUTO, 2WD or 4WD and 4H or 4LO.  DTC P1813 will set if
more than two switch inputs are simultaneously detected by the transfer control unit due to a short circuit in the
4WD shift switch.

DTC Logic

INFOID:0000000001728356

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1813 displayed?

YES

>> Perform diagnosis procedure. Refer to 

DLN-34, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728357

1.

CHECK 4WD SHIFT SWITCH SIGNAL

 With CONSULT-III

1.

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

2.

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

3.

Read out ON/OFF switching action of the “2WD SWITCH”, “AUTO SWITCH”, “LOCK SWITCH” and “4L
SWITCH” while operating 4WD shift switch.

 Without CONSULT-III

1.

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

2.

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

OK or NG

OK 

>> GO TO 5.

NG

>> GO TO 2.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1813]

4WD MODE SW

More than two switch inputs are simulta-
neously detected due to short circuit of 
4WD shift switch.

Refer to 

DLN-34

.

Connector

Terminal

Condition

Voltage (Ap-

prox.)

M152

9 - ground

4WD shift switch: 2WD

Battery voltage

4WD shift switch: AUTO, 4H or 4LO

0V

18 - ground

4WD shift switch: 4H

Battery voltage

4WD shift switch: 2WD, AUTO or 
4LO

 0V

23 - ground

4WD shift switch: 4LO

Battery voltage

4WD shift switch: 2WD, AUTO or 4H

 0V

24 - ground

4WD shift switch: AUTO

Battery voltage

4WD shift switch: 2WD, 4H or 4LO

0V

WDIA0167E

P1813 4WD SHIFT SWITCH

DLN-35

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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N

O

P

2.

CHECK 4WD SHIFT SWITCH POWER SUPPLY CIRCUIT

1.

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

2.

Disconnect 4WD shift switch harness connector.

3.

Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.

4.

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

5.

Check voltage between 4WD shift switch harness connector ter-
minal 1 and ground.

OK or NG 

OK

>> GO TO 3.

NG

>>

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

• Harness for short or open between transfer shut off

relay harness connector E155 terminal 5.

• Power suppy circuit for transfer control unit.  Refer to 

DLN-25, "Diagnosis Procedure"

.

3.

CHECK HARNESS BETWEEN 4WD SHIFT SWITCH AND TRANSFER CONTROL UNIT

1.

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

2.

Disconnect transfer control unit harness connector and the 4WD shift switch harness connector.

3.

Check continuity between the following terminals.

-

Transfer control unit harness connector M152 terminal 9 and
4WD shift switch harness connector M141 terminal 2.

-

Transfer control unit harness connector M152 terminal 18 and
4WD shift switch harness connector M141 terminal 5.

-

Transfer control unit harness connector M152 terminal 23 and
4WD shift switch harness connector M141 terminal 6.

-

Transfer control unit harness connector M152 terminal 24 and
4WD shift switch harness connector M141 terminal 3.

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

 OK or NG

 OK 

>> GO TO 4.

 NG

>> Repair or replace damaged parts.

4.

CHECK 4WD SHIFT SWITCH

1.

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

2.

Disconnect 4WD shift switch harness connector. 

Connector Terminal

Voltage 

(Approx.)

 M141

1 - Ground

0V

WDIA0183E

Connector

Terminal

Voltage (Approx.)

M141

1 - Ground

Battery voltage

WDIA0184E

Continuity should exist.

WDIA0185E

DLN-36

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1813 4WD SHIFT SWITCH

3.

Operate 4WD shift switch and check continuity between 4WD
shift switch terminals.

OK or NG

OK

>> GO TO 5.

NG

>> Replace 4WD shift switch.

5.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-83, "Reference Value"

.

OK or NG

OK

>> GO TO 6.

 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.

6.

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:0000000001728358

4WD SHIFT SWITCH

1.

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

2.

Disconnect 4WD shift switch harness connector. 

3.

Operate 4WD shift switch and check continuity between 4WD
shift switch terminals.

Connector

Terminal

Condition

Continuity

M141

1 - 2

4WD shift switch: 2WD

Yes

4WD shift switch: AUTO, 4H and 
4LO

No

1 - 3

4WD shift switch: AUTO

Yes

4WD shift switch: 2WD, 4H and 
4LO

No

1 - 4

4WD shift switch: 2WD

No

4WD shift switch: AUTO, 4H and 
4LO

Yes

1 - 5

4WD shift switch: 4H

Yes

4WD shift switch: 2WD, AUTO, 
and 4LO

No

1 - 6

4WD shift switch: 4LO

Yes

4WD shift switch: 2WD, AUTO and 
4H

No

WDIA0168E

WDIA0168E

P1813 4WD SHIFT SWITCH

DLN-37

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

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A

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DLN

N

O

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4.

If NG, replace the 4WD shift switch.

Connector

Terminal

Condition

Continuity

M141

1 - 2

4WD shift switch: 2WD

Yes

4WD shift switch: AUTO, 4H and 
4LO

No

1 - 3

4WD shift switch: AUTO

Yes

4WD shift switch: 2WD, 4H and 
4LO

No

1 - 4

4WD shift switch: 2WD

No

4WD shift switch: AUTO, 4H and 
4LO

Yes

1 - 5

4WD shift switch: 4H

Yes

4WD shift switch: 2WD, AUTO, 
and 4LO

No

1 - 6

4WD shift switch: 4LO

Yes

4WD shift switch: 2WD, AUTO and 
4H

No

DLN-38

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

P1814 WAIT DETECTION SWITCH

P1814 WAIT DETECTION SWITCH

Description

INFOID:0000000001728359

The wait detection switch detects if the transfer case is in 4WD.  DTC P1814 will set if an improper signal from
the wait detection switch is input due to open or short circuit.

DTC Logic

INFOID:0000000001728360

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1814 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-38, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000001728361

1.

CHECK WAIT DETECTION 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 “WAIT DETCT SW”.

 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

[P1814]

4WD DETECT SWITCH

Improper signal from wait detection 
switch is input due to open or short cir-
cuit.

Refer to 

DLN-38

.

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 motor is operat-
ing.)

OFF 

→

 ON

4WD shift switch: 4LO to 4H 
(While actuator motor is operat-
ing.)

ON 

→

 OFF

4WD shift switch: 4LO

ON

SDIA2701E

P1814 WAIT DETECTION SWITCH

DLN-39

< COMPONENT DIAGNOSIS >

[TRANSFER: ATX14B]

C

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F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

OK or NG

OK 

>> GO TO 5.

NG

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH

1.

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

2.

Disconnect transfer control unit harness connector and the wait detection switch harness connector.

3.

Check continuity between transfer control unit harness connec-
tor M153 terminal 43 and wait detection switch harness connec-
tor F59 terminal 10.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

CHECK GROUND CIRCUIT

1.

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

2.

Disconnect wait detection switch harness connector.

3.

Check continuity between wait detection switch harness con-
nector F59 terminal 11 and ground.

Also check harness for short to power.

 OK or NG

 OK 

>> GO TO 4.

 NG

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

nectors.

4.

CHECK WAIT DETECTION SWITCH

1.

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

2.

Disconnect wait detection switch harness connector.

3.

Remove wait detection switch. Refer to 

DLN-18, "Component Parts Location"

.

Connector

Terminal

Condition

Voltage 

(Approx.)

M153

43 - 

Ground

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

“N” position

• Brake pedal de-

pressed

4WD shift switch: 
2WD, AUTO or 4H

Battery 
voltage

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

Battery 
voltage 

→

 0V

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

0V 

→

 

Battery 
voltage

4WD shift switch: 4LO

0V

Continuity should exist.

SDIA2702E

Continuity should exist.

SDIA2703E