Nissan Frontier. Manual - part 344

DLN-278

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1835 CONTROL UNIT 2

P1835 CONTROL UNIT 2

Description

INFOID:0000000009479827

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

DLN-311, "Removal and Installation"

.

DTC Logic

INFOID:0000000009479828

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1835

CONTROL UNIT 2
[P1835]

A malfunction is detected in the memory (ROM) of the dif-
ferential lock control unit. 

Replace differential lock 
control unit. Refer to 

DLN-

311, "Removal and Installa-
tion"

.

P1836 CONTROL UNIT 3

DLN-279

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

P1836 CONTROL UNIT 3

Description

INFOID:0000000009479829

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

DLN-311, "Removal and Installation"

.

DTC Logic

INFOID:0000000009479830

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1836

CONTROL UNIT 3
[P1836]

A malfunction is detected in the memory (EEPROM) of 
the differential lock control unit. 

Replace differential lock 
control unit. Refer to 

DLN-

311, "Removal and Installa-
tion"

.

DLN-280

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1837 CONTROL UNIT 4

P1837 CONTROL UNIT 4

Description

INFOID:0000000009479831

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

DLN-311, "Removal and Installation"

.

DTC Logic

INFOID:0000000009479832

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1837

CONTROL UNIT 4
[P1837]

The AD converter system of the differential lock control 
unit is malfunctioning. 

Replace differential lock 
control unit. Refer to 

DLN-

311, "Removal and Installa-
tion"

.

P1838 ON SWITCH

DLN-281

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

P1838 ON SWITCH

Description

INFOID:0000000009479833

The differential lock mode switch sends differential lock ON/OFF request signals to the differential lock control

unit.

DTC Logic

INFOID:0000000009479834

Diagnosis Procedure

INFOID:0000000009479835

Regarding Wiring Diagram information, refer to 

DLN-298, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL LOCK MODE SWITCH OPERATION

1. Turn ignition switch ON.

2. Using CONSULT, select “D-LOCK SW SIG” of DIFF LOCK data monitor items.

3. While operating the differential lock mode switch, check that the display value changes between ON/OFF.

Is the inspection result normal?

YES

>> Differential lock mode switch is operating properly.

NO

>> GO TO 2.

2.

CHECK DIFFERENTIAL LOCK MODE SWITCH POWER SUPPLY CIRCUIT

1. Disconnect differential lock mode switch harness connector.

2. Turn ignition switch ON.

3. Check voltage between differential lock mode switch harness

connector M149 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK DIFFERENTIAL LOCK MODE SWITCH SIGNAL

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1838

ON SW
[P1838]

Two switch inputs were simultaneously detected due to a 
short circuit in the differential lock mode switch. 

Inspect the differential lock 
mode switch. Refer to 

DLN-

281, "Diagnosis Procedure"

.

Switch ON

Display item ON

Switch OFF

Display item OFF

(+)

(-)

Voltage (Approx.)

Connector

Terminal

M149

 3

 Ground

Battery voltage

SDIA2534E