Nissan Frontier. Manual - part 347

DLN-290

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1849 SOLENOID SHORT

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check for a mechanical malfunction with the differential lock system. Replace differential sole-

noid.

4.

CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT

1. Disconnect differential lock control unit harness connector.

2. Check continuity between differential lock control unit harness

connector M70 (A) terminals 11, 12 and differential lock solenoid

harness connector C117 (B) terminals 4, 2.

3. Check continuity between differential lock control unit harness

connector M70 (A) terminals 11, 12 and ground.

Is the inspection result normal?

 YES

>> Replace the differential lock control unit. Refer to 

DLN-311, "Removal and Installation"

.

 NG

>> Repair harness or connector.

Component

(+)

(-)

Solenoid operation

Terminal

Terminal

Differential lock 

solenoid

4

2

Yes

A

B

Continuity

Connector

Terminal

Connector

Terminal

M70

11

C117

4

Yes

12

2

A

—

Continuity

Connector

Terminal

M70

11

Ground

No

12

AWDIA0311ZZ

P1850 SOLENOID CURRENT

DLN-291

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

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P1850 SOLENOID CURRENT

Description

INFOID:0000000009479850

The differential lock control unit supplies power and ground to the differential lock solenoid via the differential

lock solenoid relay (integral to the differential lock control unit). 

DTC Logic

INFOID:0000000009479851

Diagnosis Procedure

INFOID:0000000009479852

Regarding Wiring Diagram information, refer to 

DLN-298, "Wiring Diagram"

.

1.

CHECK DIFFERENTIAL SOLENOID CONTROL

1. Start engine.

2. Using CONSULT, 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 harness connector C117.

3. Check resistance between differential lock solenoid terminals 2 and 4.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace differential solenoid.

3.

CHECK DIFFERENTIAL LOCK SOLENOID OPERATION

Check operation by applying power and ground to the differential lock solenoid terminals.

Is the inspection result normal?

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

P1850

SOL CURRENT
[P1850]

The differential lock relay does not switch to OFF or there 
is a short to power in the harness. 

Inspect the differential lock 
solenoid. Refer to 

DLN-291, 

"Diagnosis Procedure"

.

Monitor item

Condition

Differential lock mode switch

Display value

RELAY ON

• Vehicle stopped
• Engine running
• VDC OFF switch: 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

Component

(+)

(-)

Solenoid operation

Terminal

Terminal

Differential lock 

solenoid

4

2

Yes

DLN-292

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

P1850 SOLENOID CURRENT

YES

>> GO TO 4.

NO

>> Check for a mechanical malfunction with the differential lock system. Replace differential sole-

noid.

4.

CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT

1. Disconnect differential lock control unit harness connector.

2. Check continuity between differential lock control unit harness

connector M70 (A) terminals 11, 12 and differential lock solenoid

harness connector C117 (B) terminals 4, 2.

3. Check continuity between differential lock control unit harness

connector M70 (A) terminals 11, 12 and ground.

Is the inspection result normal?

 YES

>> Replace the differential lock control unit. Refer to 

DLN-311, "Removal and Installation"

.

 NG

>> Repair harness or connector.

A

B

Continuity

Connector

Terminal

Connector

Terminal

M70

11

C117

4

Yes

12

2

A

—

Continuity

Connector

Terminal

M70

11

Ground

No

12

AWDIA0311ZZ

C1203 ABS SYSTEM

DLN-293

< DTC/CIRCUIT DIAGNOSIS >

[REAR FINAL DRIVE: M226 (ELD) ]

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DLN

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C1203 ABS SYSTEM

Description

INFOID:0000000009479853

The differential lock control unit and the ABS actuator and electric unit (control unit) are in communication via

the CAN communication network. Vehicle speed and wheel slippage information is used by the differential lock

control unit to determine if conditions are met to actuate the differential lock solenoid. 

DTC Logic

INFOID:0000000009479854

DTC

Display contents of CONSULT

DTC Detection Condition

Action to take

C1203

ABS SYSTEM
[C1203]

A malfunction related to wheel speed sensors has been 
detected by the ABS actuator and electric unit (control 
unit). 

Check for proper ABS oper-
ation. Refer to 

BRC-29, 

"CONSULT Function (ABS)"

 

(Type 1) or 

BRC-147, "CON-

SULT Function (ABS)"

 (Type 

2).