Nissan Frontier. Manual - part 286

DLN-46

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1817 ACTUATOR MOTOR

Does actuator motor rotate?

YES

>> GO TO 9.

NO

>> Replace transfer control device (actuator motor).

9.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-56, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 10.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

10.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Is DTC P1817 displayed?

YES

>> Replace transfer control unit. Refer to 

DLN-92, "Removal and Installation"

.

NO

>> Inspection End.

Component Inspection

INFOID:0000000009479669

ACTUATOR MOTOR

1. Remove transfer control device. Refer to 

DLN-97, "Removal and Installation"

.

2. Check operation by applying battery voltage to transfer control device (actuator motor) terminals 23 and

24.

CAUTION:

Be careful not to overheat the harness.

3. If the inspection results are abnormal replace the transfer control device (actuator motor).

TRANSFER RELAY

1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)
2. Remove transfer shift high relay and transfer shift low relay 2. Refer to 

DLN-13, "Component Parts Loca-

tion"

.

3. Apply 12V direct current between transfer shift high and low relay terminals 1 and 2.
4. Check continuity between relay terminals 3 and 4, and 3 and 5.

5. If the inspection results are abnormal replace the transfer shift

high or low relay.

Terminal

Actuator motor

24 (Battery voltage) - 23 (Ground)

Clockwise rotate

23 (Battery voltage) - 24 (Ground)

Counterclockwise rotate

Terminal

Condition

Continuity

3 - 4

12V direct current supply between terminals 1 and 2

No

OFF

Yes

3 - 5

12V direct current supply between terminals 1 and 2

Yes

OFF

No

LDIA0099E

P1818 ACTUATOR POSITION SWITCH

DLN-47

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

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P1818 ACTUATOR POSITION SWITCH

Description

INFOID:0000000009479670

The actuator position switch detects the current actuator motor range. DTC P1818 will set if either of the fol-

lowing occur:

• Improper signal from actuator position switch is input due to open or short circuit.

• Malfunction is detected in actuator position switch.

DTC Logic

INFOID:0000000009479671

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1818 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-47, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479672

Regarding Wiring Diagram information, refer to 

DLN-63, "Wiring Diagram"

.

1.

CHECK ACTUATOR POSITION SWITCH SIGNAL

With CONSULT

1. Start engine.

2. Depress brake pedal and stop vehicle.

3. Set A/T selector lever to "N" position.

4. Select “DATA MONITOR” mode for “ALL MODE AWD/4WD” with CONSULT.

5. Read out the value of “SHIFT POS SW1”, “SHIFT POS SW2”, “SHIFT POS SW3”, “SHIFT POS SW4”.

Without CONSULT

1. Start engine.

DTC

CONSULT

Diagnostic item is detected when...

Reference

[P1818]

SHIFT ACT POSI SW

• Improper signal from actuator position 

switch is input due to open or short cir-
cuit.

• Malfunction is detected in actuator po-

sition switch.

DLN-47

Monitored item

Condition

Display value

SHIFT POS SW1

4WD shift switch: 2WD and 4LO

ON

4WD shift switch: 4H

OFF

SHIFT POS SW2

4WD shift switch: 4LO

ON

4WD shift switch: 2WD and 4H

OFF

SHIFT POS SW3

4WD shift switch: 2WD and 4H

ON

4WD shift switch: 4LO

OFF

SHIFT POS SW4

4WD shift switch: 4H and 4LO

ON

4WD shift switch: 2WD

OFF

DLN-48

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1818 ACTUATOR POSITION SWITCH

2. Depress brake pedal and stop vehicle.

3. Set A/T selector lever to "N" position.

4. Check voltage between transfer control unit harness connector

terminal and ground.

Are the inspection results normal?

YES 

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND ACTUATOR POSITION SWITCH

1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)

2. Disconnect transfer control unit harness connector and the transfer control device (actuator position

switch) harness connector.

3. Check continuity between the following terminals.

-

Transfer control unit harness connector M152 terminal 10 and transfer control device (actuator position

switch) harness connector F58 terminal 26.

-

Transfer control unit harness connector M152 terminal 11 and transfer control device (actuator position

switch) harness connector F58 terminal 20.

-

Transfer control unit harness connector M152 terminal 12 and transfer control device (actuator position

switch) harness connector F58 terminal 21.

-

Transfer control unit harness connector M152 terminal 13 and transfer control device (actuator position

switch) harness connector F58 terminal 25.

Also check harness for short to ground and short to power.

Is there continuity?

YES 

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK GROUND CIRCUIT

1. Turn ignition switch “OFF”. (Stay for at least 5 seconds.)

2. Check continuity between transfer control device (actuator posi-

tion switch) harness connector F58 terminal 22 and ground.

Also check harness for short to power.

Is there continuity?

YES 

>> GO TO 4.

NO

>> Repair open circuit or short to power in harness or con-

nectors.

Connector

Terminal

Condition

Voltage 

(Approx.)

M152

10 - 

Ground

4WD shift switch: 2WD and 4LO

0V

4WD shift switch: 4H

Battery 
voltage

11 - 

Ground

4WD shift switch: 4LO

0V

4WD shift switch: 2WD and 4H

Battery 
voltage

12 - 

Ground

4WD shift switch: 2WD and 4H

0V

4WD shift switch: 4LO

Battery 
voltage

13 - 

Ground

4WD shift switch: 4H and 4LO

0V

4WD shift switch: 2WD

Battery 
voltage

SDIA3369E

Continuity should exist.

Continuity should exist.

SDIA2815E

P1818 ACTUATOR POSITION SWITCH

DLN-49

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

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4.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-56, "Reference Value"

.

Are the inspection results normal?

YES

>> GO TO 5.

NO

>> Check transfer control unit pin terminals for damage or loose connection with harness connector.

If any items are damaged, repair or replace damaged parts.

5.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Is DTC P1818 displayed?

YES

>> Replace transfer control device. Refer to 

DLN-97, "Removal and Installation"

.

NO

>> Inspection End.