Nissan Titan A60. Manual - part 322

P1839 POSITION SWITCH ON

DLN-227

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

Check voltage between differential lock position switch connector

C16 terminal 1 and ground.

Is the inspection result normal?

YES 

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between differential lock position switch har-

ness connector C16 terminal 3 and ground.

Is the inspection result normal?

YES

>> Replace the differential lock control unit. Refer to 

DLN-

253, "Removal and Installation"

.

NO

>> Repair harness or connector.

5.

CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND DIFFERENTIAL LOCK PO-

SITION SWITCH

1. Turn ignition switch OFF.

2. Disconnect differential lock control unit harness connector B77.

3. Check continuity between differential lock control unit harness

connector B77 (A) terminal 20 and differential lock position

switch harness connector C16 (B) terminal 1.

4. Check continuity between differential lock control unit harness

connector B77 (A) terminal 20 and ground. 

Is the inspection result normal?

 YES  >> Replace differential lock control unit. Refer to 

DLN-253, "Removal and Installation"

.

 NO

>> Repair harness or connector.

(+)

(-)

Voltage (Approx.)

Connector

Terminal

C16

1

Ground

Battery voltage

AWDIA0391ZZ

Connector

Terminal

—

Continuity

C16

3

Ground

Yes

AWDIA0392ZZ

Connector

Terminal

Connector

Terminal

Continuity

B77 (A)

20

C16 (B)

1

Yes

Connector

Terminal

Ground

No

B77 (A)

20

AWDIA0393ZZ

DLN-228

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1844 RELAY

P1844 RELAY

Description

INFOID:0000000006179594

The differential lock solenoid relay is an integral part of the differential lock control unit. 

DTC Logic

INFOID:0000000006179595

Diagnosis Procedure

INFOID:0000000006179596

Regarding Wiring Diagram information, refer to 

DLN-240, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY 

1. Turn ignition switch OFF.

2. Disconnect differential lock control unit connector.

3. Turn ignition switch ON.

4. Check voltage between differential lock control unit connector

B77 terminals 1, 2, 15 and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Check fuse. Repair harness or connectors. 

2.

CHECK DIFFERENTIAL LOCK CONTROL UNIT GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between differential lock control unit connector

B77 terminals 3, 10 and ground.

Is the inspection result normal?

YES

>> Power and ground supply is normal.

NO

>> Repair harness or connectors.

DTC

Display contents of CONSULT-III

DTC Detection Condition

Action to take

P1844

RELAY
[P1844]

The differential lock control unit relay monitor did not de-
tect expected voltage at the relay. 

Inspect differential lock con-
trol unit relay power and 
ground supply circuit. Refer 
to 

DLN-228, "Diagnosis Pro-

cedure"

.

(+)

(-)

Voltage (Approx.)

Connector

Terminal

B77

1

Ground

Battery voltage

2

15

SDIA2563E

Connector

Terminal

—

Continuity

B77

3

Ground

Yes

10

SDIA2564E

P1847 SOLENOID CIRCUIT

DLN-229

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

P1847 SOLENOID CIRCUIT

Description

INFOID:0000000006179597

Replace the differential lock control unit if this DTC is displayed. Refer to 

DLN-253, "Removal and Installation"

.

DTC Logic

INFOID:0000000006179598

DTC

Display contents of CONSULT-III

DTC Detection Condition

Action to take

P1847

SOL CIRCUIT
[P1847]

A malfunction is detected in the differential lock control 
unit internal circuit. 

Replace differential lock 
control unit. Refer to 

DLN-

253, "Removal and Installa-
tion"

DLN-230

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1848 SOLENOID DISCONNECT

P1848 SOLENOID DISCONNECT

Description

INFOID:0000000006179599

When power and ground is supplied from the differential lock control unit, the differential lock solenoid will

actuate to move the pressure plate against the cam ring to lock the differential. By reversing polarity at the dif-

ferential lock control unit, the differential lock solenoid moves the pressure plate away from the cam ring to

unlock the differential. 

DTC Logic

INFOID:0000000006179600

Diagnosis Procedure

INFOID:0000000006179601

Regarding Wiring Diagram information, refer to 

DLN-240, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL SOLENOID CONTROL

1. Start engine.

2. Using CONSULT-III, select “RELAY ON”, “RELAY MTR”, “SOL MTR” of DIFF LOCK data monitor.

3. Observe the display values while operating the differential lock system.

Is the inspection result normal?

YES

 >> Differential lock solenoid control system is operating normally.

NO

>> GO TO 2.

2.

CHECK DIFFERENTIAL LOCK SOLENOID RESISTANCE

1. Turn ignition switch OFF.

2. Disconnect differential lock solenoid connector.

3. Check resistance between differential lock solenoid terminals 2

and 4.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace differential lock solenoid.

3.

CHECK DIFFERENTIAL LOCK SOLENOID OPERATION

DTC

Display contents of CONSULT-III

DTC Detection Condition

Action to take

P1848

SOL DISCONNECT
[P1848]

An open was detected in the differential lock solenoid or 
circuit.

Inspect differential lock sole-
noid. Refer to 

DLN-230, "Di-

agnosis Procedure"

.

Monitor item

Condition

Differential lock mode switch

Display value

RELAY ON

• Vehicle stopped
• Engine running
• VDC OFF switch (if 

equipped): ON

• 4WD shift switch: 4LO

ON

ON

OFF

OFF

RELAY MTR

ON

ON

OFF

OFF

SOL MTR

ON

ON

OFF

OFF

2 - 4

: Approx. 3.4

Ω

AWDIA0394ZZ