Nissan Titan. Manual - part 117

DLN-40

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1817 ACTUATOR MOTOR

P1817 ACTUATOR MOTOR

Description

INFOID:0000000009885987

The actuator motor receives signals from the transfer control unit and controls shift rods which shift the trans-

fer case.  DTC P1817 or flash code 11 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:0000000009885988

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1817 or flash code 11 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-40, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009885989

Regarding Wiring Diagram information, refer to 

DLN-62, "Wiring Diagram"

.

1.

CHECK ACTUATOR MOTOR SIGNAL

With CONSULT

1. Start engine.

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

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

DTC

CONSULT

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-40, "Diagnosis Procedure"

P1817 ACTUATOR MOTOR

DLN-41

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

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 posi-
tion

• 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.)

E143

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 posi-
tion

• Brake pedal 

depressed

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

0V

Except the above

Battery 
voltage

E143

 47 - 

Ground

• Vehicle 

stopped

• Engine run-

ning

• A/T selector 

lever N posi-
tion

• 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

DLN-42

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1817 ACTUATOR MOTOR

OK or NG

OK 

>> GO TO 9.

NG

>> 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.

OK or NG

OK

>> GO TO 3.

NG

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

control unit harness connector E143  terminal  27

and transfer shut off relay 2 harness connector E47

terminal 3  and 10A fuse (No. 26, located in the fuse and fusible link box).  If any items are

damaged, repair or replace damaged parts.

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

DLN-20, "Diagnosis Procedure"

.

3.

CHECK TRANSFER SHIFT 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-12, "Component Parts Loca-

tion"

.

3. Check voltage between transfer shift high/low relay harness

connector terminals and ground.

Connector

Terminal

Voltage (Approx.)

E143

27 - Ground

0V

SDIA2808E

Connector

Terminal

Voltage (Approx.)

E143

27 - Ground

Battery voltage

SDIA2807E

Connector

Terminal

Voltage (Approx.)

A: E156

2 - Ground

0V

B: E157

2 - Ground

0V

WDIA0319E

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

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

5. Check voltage between transfer shift high/low relay harness

connector terminals and ground.

OK or NG

OK

>> GO TO 4.

NG

>> 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 E156 terminal 2.

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

transfer shift low relay harness connector terminal E157 terminal 2.

4.

CHECK TRANSFER SHIFT 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 relay and

transfer shift low relay terminals 1 and 2.

4. Check continuity between relay terminals 3 and 4, 3 and 5.

OK or NG

OK

>> GO TO 5.

NG

>> Replace the transfer 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 E143 (A) terminal 42

and transfer shift high relay harness connector E156 (B) termi-

nal 1.

-

Transfer control unit harness connector E143 (A) terminal 50

and transfer shift low relay harness connector E157 (C) terminal

1.

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

OK or NG

OK

>> GO TO 6.

NG

>> 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.)

A: E156

2 - Ground

Battery voltage

B: E157

2 - Ground

Battery voltage

WDIA0320E

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

WIIA0291E

Continuity should exist.

WDIA0321E