Nissan Frontier. Manual - part 285

DLN-42

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1817 ACTUATOR MOTOR

Without CONSULT

1. Start engine.

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.

Monitored item

Condition

Display value

SHIFT ACT1

• Vehicle 

stopped

• Engine run-

ning

• A/T  selector 

lever “N” po-
sition

• Brake pedal 

depressed

4WD shift switch: 2WD to 
4H or 4H to 4LO or 2WD to 
4LO

ON

Except the above

OFF

SHIFT AC MON1

4WD shift switch: 2WD to 
4H or 4H to 4LO or 2WD to 
4LO

ON

Except the above

OFF

SHIFT ACT2

4WD shift switch: 4LO to 
4H or 4H to 2WD or 4LO to 
2WD

ON

Except the above

OFF

SHIFT AC MON2

4WD shift switch: 4LO to 
4H or 4H to 2WD or 4LO to 
2WD

ON

Except the above

OFF

Connector

Terminal

Condition

Voltage 

(Approx.)

M153

28 - 

Ground

When 4WD shift switch is operated (While 
actuator motor is operating.)

Battery 
voltage 

→ 

0V

When 4WD shift switch is not operated

0V

31 - 

Ground

Always

0V

42 - 

Ground

• Vehicle 

stopped

• Engine run-

ning

• A/T selector 

lever “N” po-
sition

• Brake pedal 

depressed

4WD shift switch: 2WD to 
4H or 4H to 4LO or 2WD to 
4LO

0V

Except the above

Battery 
voltage

M153

 47 - 

Ground

• Vehicle 

stopped

• Engine run-

ning

• A/T selector 

lever “N” po-
sition

• Brake pedal 

depressed

4WD shift switch: 2WD to 
4H or 4H to 4LO or 2WD to 
4LO

Battery 
voltage 

→ 

0V

Except the above

0V

 48 - 

Ground

4WD shift switch: 4LO to 
4H or 4H to 2WD or 4LO to 
2WD

Battery 
voltage 

→ 

0V

Except the above

0V

 50 - 

Ground

4WD shift switch: 4LO to 
4H or 4H to 2WD or 4LO to 
2WD

0V

Except the above

Battery 
voltage

WDIA0144E

P1817 ACTUATOR MOTOR

DLN-43

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

Are the inspection results normal?

YES 

>> GO TO 9.

NO

>> GO TO 2.

2.

CHECK ACTUATOR MOTOR POWER SUPPLY CIRCUIT

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

2. Disconnect transfer control unit harness connector.

3. Check voltage between transfer control unit harness connector

terminal 27 and ground.

4. Turn ignition switch “ON”.

5. Check voltage between transfer control unit harness connector

terminal 27 and ground.

Are the inspection results normal?

YES

>> GO TO 3.

NO

>> 1. Check harness for short or open between transfer

control unit harness connector M153 terminal 27

and transfer shut off relay 2 harness connector

E157 terminal 5 and 10A fuse (No. 57, located in the fuse and relay block). If any items are

damaged, repair or replace damaged parts.

2. Perform trouble diagnosis for power supply circuit. Refer to 

DLN-21, "Diagnosis Procedure"

.

3.

CHECK TRANSFER RELAY POWER SUPPLY CIRCUIT

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

2. Remove transfer shift high relay and transfer shift low relay. Refer to 

DLN-13, "Component Parts Loca-

tion"

.

3. Check voltage between transfer shift high and low relay connec-

tor terminals and ground.

Connector

Terminal

Voltage (Approx.)

M153

27 - Ground

0V

SDIA2808E

Connector

Terminal

Voltage (Approx.)

M153

27 - Ground

Battery voltage

SDIA2807E

Connector

Terminal

Voltage (Approx.)

E46

2 - Ground

0V

E47

2 - Ground

0V

SDIA3384E

DLN-44

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1817 ACTUATOR MOTOR

4. Turn ignition switch “ON”. (Do not start engine.)

5. Check voltage between transfer shift high and low relay connec-

tor terminals and ground.

Are the inspection results normal?

YES

>> GO TO 4.

NO

>> Check the following. If any items are damaged, repair

or replace damaged parts.

• Harness for short or open between transfer control unit harness connector terminal 27 and

transfer shift high relay harness connector E46 terminal 2.

• Harness for short or open between transfer control unit harness connector terminal 27 and

transfer shift low relay harness connector terminal E47 terminal 2.

4.

CHECK TRANSFER RELAY

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

2. Remove transfer shift high relay and transfer shift low relay.

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, 3 and 5.

Are the inspection results normal?

YES

>> GO TO 5.

NO

>> Replace the transfer shift high or low relay.

5.

CHECK (1): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY

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

2. Disconnect transfer control unit harness connector.

3. Remove transfer shift high relay and transfer shift low relay.

4. Check continuity between the following terminals.

-

Transfer control unit harness connector M153 terminal 42 and

transfer shift high relay harness connector E46 terminal 1.

-

Transfer control unit harness connector M153 terminal 50 and

transfer shift low relay harness connector E47 terminal 1.

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

Is there continuity?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK (2): HARNESS BETWEEN TRANSFER CONTROL UNIT AND TRANSFER SHIFT RELAY

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

2. Disconnect transfer control unit harness connector.

3. Remove transfer shift high relay and transfer shift low relay.

Connector

Terminal

Voltage (Approx.)

E46

2 - Ground

Battery voltage

E47

2 - Ground

Battery voltage

SDIA3385E

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

Continuity should exist.

SDIA3386E

P1817 ACTUATOR MOTOR

DLN-45

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

4. Check continuity between the following terminals.

-

Transfer control unit harness connector M153 terminal 28 and

transfer shift high relay harness connector E46 terminal 5.

-

Transfer control unit harness connector M153 terminal 28 and

transfer shift low relay harness connector E47 terminal 5.

-

Transfer control unit harness connector M153 terminal 31 and

transfer shift high relay harness connector E46 terminal 4.

-

Transfer control unit harness connector M153 terminal 31 and

transfer shift low relay harness connector E47 terminal 4.

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

Is there continuity?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK ACTUATOR MOTOR OPERATION CIRCUIT

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

2. Disconnect transfer control unit harness connector and the transfer control device (actuator motor) har-

ness connector.

3. Check continuity between the following terminals.

-

Transfer control unit harness connector M153 terminal 47 and

transfer control device (actuator motor) harness connector F58

terminal 23.

-

Transfer control unit harness connector M153 terminal 48 and

transfer control device (actuator motor) harness connector F58

terminal 24.

-

Transfer control device (actuator motor) harness connector F58

terminal 24 and transfer shift high relay harness connector E46

terminal 3.

-

Transfer control device (actuator motor) harness connector F58

terminal 23 and transfer shift low relay harness connector E47

terminal 3.

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

Is there continuity?

YES

>> GO TO 8.

NO

>> Repair or replace damaged parts.

8.

CHECK 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.

Continuity should exist.

SDIA3387E

SDIA2811E

Continuity should exist.

SDIA3394E

Terminal

Actuator motor

24 (Battery voltage) - 23 (Ground)

Clockwise rotate

23 (Battery voltage) - 24 (Ground)

Counterclockwise rotate