Nissan Frontier. Manual - part 345

 

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Nissan Frontier. Manual - part 345

 

 

DLN-282

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1838 ON SWITCH

1. Turn ignition switch OFF.

2. Connect differential lock mode switch harness connector.

3. Check voltage between differential lock control unit harness

connector M70 terminals 9, 22 and ground.

Is the inspection result normal?

YES 

>> Replace the differential lock control unit. Refer to 

DLN-311, "Removal and Installation"

.

NO

>> GO TO 4.

4.

CHECK DIFFERENTIAL LOCK MODE SWITCH

1. Turn ignition switch OFF.

2. Disconnect differential lock mode switch harness connector.

3. Operate differential lock mode switch and check continuity between differential lock mode switch termi-

nals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace differential lock mode switch.

5.

CHECK HARNESS BETWEEN DIFFERENTIAL LOCK CONTROL UNIT AND DIFFERENTIAL LOCK

MODE SWITCH
1. Check continuity between differential lock control unit harness

connector M70 (A) terminals 9, 22 and differential lock mode

switch harness connector M149 (B) terminals 2, 1.

2. Check continuity between differential lock control unit harness

connector M70 (A) terminals 9, 22 and ground. 

Is the inspection result normal?

 YES  >> Replace the differential lock control unit. Refer to 

DLN-311, "Removal and Installation"

.

 NO

>> Repair harness or connector.

(+)

(-)

Differential lock mode 

switch

Voltage (Approx.)

Connector

Terminal

M70

 9

Ground

ON

Battery voltage

OFF

0V

 22

ON

0V

OFF

Battery voltage

SDIA2568E

Terminals

Differential lock mode switch

Continuity

1 - 3

ON

No

OFF

Yes

2 - 3

ON

Yes

OFF

No

Connector

Terminal

Connector

Terminal

Continuity

M70 (A)

9

M149 (B)

2

Yes

22

1

Connector

Terminal

Ground

Continuity

M70 (A)

9

No

22

ALDIA0165ZZ

P1839 POSITION SWITCH ON

DLN-283

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

C

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A

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DLN

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P1839 POSITION SWITCH ON

Description

INFOID:0000000009479836

The differential lock position switch sends a signal to the differential lock control unit when the differential lock

is engaged. The differential lock control unit monitors the left and right rear wheel speed sensor signals to

determine wheel slippage. When the differential lock is engaged the left and right rear wheel speed sensor sig-

nals should match. 

DTC Logic

INFOID:0000000009479837

Diagnosis Procedure

INFOID:0000000009479838

Regarding Wiring Diagram information, refer to 

DLN-298, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL LOCK POSITION SWITCH SIGNAL

1. Start engine.

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

3. Activate the differential lock according to the directions listed in the table and monitor the display value.

Is the inspection result normal?

YES

 >> Differential lock position switch is operating normally.

NO

>> GO TO 2.

2.

CHECK DIFFERENTIAL LOCK POSITION SWITCH

1. Disconnect differential lock position switch harness connector.

2. Turn ignition switch ON.

3. Select “D-LOCK POS SW SIG” of DIFF LOCK data monitor.

4. Monitor the display value while connecting and disconnecting a

jumper wire between differential lock position switch harness

connector C116 terminals 1 and 3.

Is the inspection result normal?

YES

>> Check the mechanical operation of the differential lock. Replace the differential lock position

switch. Refer to 

DLN-312, "Removal and Installation"

.

NO

>> GO TO 3.

3.

CHECK DIFFERENTIAL LOCK POSITION SWITCH VOLTAGE

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1839

POSI SW ON
[P1839]

The differential lock position switch is ON indicating the 
differential is locked, but the differential lock control unit 
detects a difference between left and right rear wheel 
speeds. 

Inspect the differential lock 
position switch. Refer to 

DLN-283, "Diagnosis Proce-
dure"

.

Monitor item

Condition

Display value

D-LOCK POS SW SIG

• Vehicle stopped
• Engine running
• VDC OFF switch (A/T mod-

els): ON

• 4WD shift switch: 4LO

Differential lock mode switch: ON
(DIFF LOCK indicator lamp: ON)

ON

Differential lock mode switch: OFF
(DIFF LOCK indicator lamp: OFF)

OFF

Monitor item

Condition

Display value

D-LOCK POS SW SIG

Jumper wire connected

ON

Jumper wire disconnected

OFF

AWDIA0305ZZ

DLN-284

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1839 POSITION SWITCH ON

Check voltage between differential lock position switch harness con-

nector C116 terminal 3 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 C116 terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace the differential lock control unit. Refer to 

DLN-

311, "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.

3. Check continuity between differential lock control unit harness connector M70 terminal 20 and differential

lock position switch harness connector C116 terminal 3.

4. Check continuity between differential lock control unit harness connector M70 terminal 20 and ground. 

Is the inspection result normal?

 YES  >> Replace differential lock control unit. Refer to 

DLN-311, "Removal and Installation"

.

 NO

>> Repair harness or connector.

(+)

(-)

Voltage (Approx.)

Connector

Terminal

C116

3

Ground

Battery voltage

AWDIA0306ZZ

Connector

Terminal

—

Continuity

C116

1

Ground

Yes

AWDIA0307ZZ

Connector

Terminal

Connector

Terminal

Continuity

M70

20

C116

3

Yes

Connector

Terminal

Ground

Continuity

M70

20

No

P1844 RELAY

DLN-285

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

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P1844 RELAY

Description

INFOID:0000000009479839

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

DTC Logic

INFOID:0000000009479840

Diagnosis Procedure

INFOID:0000000009479841

Regarding Wiring Diagram information, refer to 

DLN-298, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY 

1. Turn ignition switch OFF.

2. Disconnect differential lock control unit harness connector.

3. Turn ignition switch ON.

4. Check voltage between differential lock control unit harness

connector M70 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 harness

connector M70 terminals 3, 10 and ground.

Is the inspection result normal?

YES

>> Replace the differential lock control unit. Refer to 

DLN-

311, "Removal and Installation"

.

NO

>> Repair harness or connectors.

DTC

Display contents of CONSULT

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-285, "Diagnosis Pro-

cedure"

.

(+)

(-)

Voltage (Approx.)

Connector

Terminal

M70

1

Ground

Battery voltage

2

15

SDIA2563E

Connector

Terminal

—

Continuity

M70

3

Ground

Yes

10

SDIA2564E

 

 

 

 

 

 

 

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