Nissan Frontier D40. Manual - part 255

P1817 ACTUATOR MOTOR

DLN-41

< COMPONENT DIAGNOSIS >

[TRANSFER: TX15B]

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P1817 ACTUATOR MOTOR

Description

INFOID:0000000005275445

The actuator motor receives signals from the transfer control unit and controls shift rods which shift the trans-
fer case.  DTC P1817 will set when any of the following occur:
• Motor does not operate properly due to open or short circuit in actuator motor.
• Malfunction is detected in the actuator motor. (When 4WD shift switch is operated and actuator motor does

not operate)

• Malfunction is detected in transfer shift high relay or transfer shift low relay.

DTC Logic

INFOID:0000000005275446

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Perform self-diagnosis.

Is DTC P1817 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-41, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005275447

Regarding Wiring Diagram information, refer to 

DLN-60, "Wiring Diagram"

.

1.

CHECK ACTUATOR MOTOR SIGNAL

With CONSULT-III

1.

Start engine.

2.

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

3.

Read out the value of “SHIFT ACT1”, “SHIFT AC MON1”, “SHIFT ACT2”, “SHIFT AC MON2”.

DTC

CONSULT-III

Diagnostic item is detected when...

Reference

[P1817]

SHIFT ACTUATOR

• Motor does not operate properly due 

to open or short circuit in actuator mo-
tor.

• Malfunction is detected in the actuator 

motor. (When 4WD shift switch is op-
erated and actuator motor is not oper-
ated)

• Malfunction is detected in transfer shift 

high relay or transfer shift low relay.

DLN-41

DLN-42

< COMPONENT DIAGNOSIS >

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P1817 ACTUATOR MOTOR

Without CONSULT-III

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

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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

< COMPONENT DIAGNOSIS >

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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