Infiniti QX56 (Z62). Manual - part 471

DLN-84

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

P182A TRANSFER HI-LO POSITION SENSOR

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK TRANSFER HI-LO POSITION SENSOR CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect transfer control unit harness connector.

3.

Check the continuity between transfer control unit harness connector and transfer Hi-Lo position sensor
harness connector.

4.

Check the continuity between transfer Hi-Lo position sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

REPLACE TRANSFER HI-LO POSITION SENSOR

1.

Replace transfer Hi-Lo position sensor. Refer to 

DLN-116, "Exploded View"

.

2.

Perform confirmation procedure again. Refer to 

DLN-83, "DTC Logic"

.

Is DTC “P182A” detected?

YES

>> GO TO 5.

NO

>> INSPECTION END

5.

CHECK TERMINALS AND HARNESS CONNECTORS

Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?

YES

>> Replace transfer control unit. Refer to 

DLN-107, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

+

−

Voltage

Transfer Hi-Lo position sensor

Connector

Terminal

F42

1

Ground

Approx. 5 V

2

Transfer control unit

Transfer Hi-Lo position sensor

Continuity

Connector

Terminal

Connector

Terminal

E59

6

F42

1

Existed

25

2

29

3

Transfer Hi-Lo position sensor

—

Continuity

Connector

Terminal

F42

1

Ground

Not existed

2

3

P182B TRANSFER LOCK POSITION SENSOR

DLN-85

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

P182B TRANSFER LOCK POSITION SENSOR

DTC Logic

INFOID:0000000006222292

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

With CONSULT-III

1.

Turn the ignition switch OFF to ON.

2.

Turn the 4WD shift switch AUTO

⇒

4H

⇒

4LO

⇒

4H

⇒

AUTO.

3.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “P182B” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

DLN-85, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006222293

1.

CHECK TRANSFER LOCK POSITION SENSOR

With CONSULT-III

1.

Start the engine.

2.

Turn the 4WD shift switch AUTO

⇒

4H

⇒

4LO

⇒

4H

⇒

AUTO.

3.

Check “LOCK POSI SEN” of CONSULT-III “DATA MONITOR” for “ALL MODE AWD/4WD”.

What is the item on "DATA MONITOR"?

OPEN >> GO TO 7.
LOCK >> GO TO 7.
UNLEAN>>GO TO 6.
HI TEMP>>GO TO 5.
ERROR>> GO TO 5.
BAT

>> GO TO 2.

GND

>> GO TO 2.

2.

CHECK TRANSFER LOCK POSITION POWER SUPPLY

1.

Turn the ignition switch OFF.

2.

Disconnect transfer position sensor harness connector.

3.

Turn the ignition switch ON.

CAUTION:

DTC

Display item

Malfunction detected condition

Possible cause

P182B

Lock POSITION SEN

Malfunction related to transfer lock posi-
tion sensor has been detected.

• Transfer lock position sensor
- Transfer lock position sensor error
- Malfunction of transfer lock position 

sensor circuit

Monitor item

Condition

Status

LOCK POSI SEN

4WD shift switch: AUTO or 4H

OPEN

4WD shift switch: 4L

LOCK

When transfer lock position sensor is unlearned.

UNLEAN

When the temperature of transfer lock position sensor is 
high.

HI TEMP

When transfer lock position sensor is malfunctioning.

ERROR

When transfer lock position sensor signal circuit is short. 
(Battery short)

BAT

When transfer lock position sensor signal circuit is short. 
(Ground short)

GND

DLN-86

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

P182B TRANSFER LOCK POSITION SENSOR

Never start the engine.

4.

Check the voltage between transfer position sensor harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK TRANSFER LOCK POSITION SENSOR POWER SUPPLY CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect transfer control unit harness connector.

3.

Check the continuity between transfer control unit harness connector and transfer lock position sensor
harness connector.

4.

Check the continuity between transfer lock position harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace error-detected parts.

4.

CHECK TRANSFER LOCK POSITION SENSOR SIGNAL CIRCUIT

1.

Turn the ignition switch OFF.

2.

Disconnect transfer control unit harness connector.

3.

Check the continuity between transfer control unit harness connector and transfer lock position sensor
harness connector.

4.

Check the continuity between transfer lock position harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

REPLACE TRANSFER LOCK POSITION SENSOR

1.

Replace transfer lock position sensor. Refer to 

DLN-119, "Removal and Installation"

.

2.

Perform confirmation procedure again. Refer to 

DLN-85, "DTC Logic"

.

Is the inspection result normal?

+

−

Voltage

Transfer lock position sensor

Connector

Terminal

F40

1

2

Approx. 5 V

Transfer control unit

Transfer lock position sensor

Continuity

Connector

Terminal

Connector

Terminal

E59

17

F40

1

Existed

30

2

Transfer lock position sensor

-

Continuity

Connector

Terminal

F40

1

Ground

Not existed

Transfer control unit

Transfer lock position sensor

Continuity

Connector

Terminal

Connector

Terminal

E59

38

F40

3

Existed

Transfer lock position sensor

-

Continuity

Connector

Terminal

F40

3

Ground

Not existed

P182B TRANSFER LOCK POSITION SENSOR

DLN-87

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: ATX90A]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

YES

>> INSPECTION END

NO

>> GO TO 7.

6.

PERFORM LEARNING OF TRANSFER LOCK POSITION SENSOR

Transfer lock position sensor. Refer to

DLN-44, "Work Procedure"

.

>> GO TO 7.

7.

CHECK TERMINALS AND HARNESS CONNECTORS

Check the pin terminals for damage or loose connection with each harness connector.
Is the inspection result normal?

YES

>> Replace transfer control unit. Refer to 

DLN-107, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.