Nissan Titan. Manual - part 119

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.

OK or NG

OK 

>> GO TO 4.

NG

>> 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 harness connector.

3. Check continuity between the following terminals.

-

Transfer control unit harness connector E142 terminal 10 and

transfer control device (actuator position switch) harness con-

nector F58 terminal 26.

-

Transfer control unit harness connector E142 terminal 11 and

transfer control device (actuator position switch) harness con-

nector F58 terminal 20.

-

Transfer control unit harness connector E142 terminal 12 and

transfer control device (actuator position switch) harness con-

nector F58 terminal 21.

-

Transfer control unit harness connector E142 terminal 13 and

transfer control device (actuator position switch) harness con-

nector F58 terminal 25.

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

 OK or NG

 OK 

>> GO TO 3.

 NG

>> Repair or replace damaged parts.

3.

CHECK GROUND CIRCUIT

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

Connector

Terminal

Condition

Voltage 

(Approx.)

E142

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.

SDIA3370E

P1818 ACTUATOR POSITION SWITCH

DLN-49

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

C

E

F

G

H

I

J

K

L

M

A

B

DLN

N

O

P

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.

 OK or NG

 OK 

>> GO TO 4.

 NG

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

nectors.

4.

CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Refer to 

DLN-56, "Reference Value"

.

OK or NG

OK

>> GO TO 5.

NG

>> 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.
OK or NG

OK

>> Inspection End.

NG

>> Replace transfer control device. Refer to 

DLN-96, "Removal and Installation"

.

Continuity should exist.

SDIA2815E

DLN-50

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1819 TRANSFER CONTROL DEVICE

P1819 TRANSFER CONTROL DEVICE

Description

INFOID:0000000009885994

The transfer control device integrates the actuator motor and actuator position switch.  DTC P1819 of flash

code 13 will set if either of the following conditions exist:

• Malfunction occurs in transfer control device drive circuit.

• Malfunction is detected in transfer shut off relay 1 and transfer shut off relay 2.

DTC Logic

INFOID:0000000009885995

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1819 or flash code 13 detected?

YES

>> Perform diagnosis procedure. Refer to 

DLN-50, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009885996

Regarding Wiring Diagram information, refer to 

DLN-62, "Wiring Diagram"

.

1.

CHECK POWER SUPPLY

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 and ground.

DTC

CONSULT

Diagnostic item is detected when...

Reference

[P1819]

SHIFT ACT CIR

• Malfunction is detected in transfer 

shut off relay 1 and transfer shut off re-
lay 2.

• Malfunction occurs in transfer control 

device drive circuit.

DLN-50, "Diagnosis Procedure"

Connector

Terminal

Voltage (Approx.)

E142

25 - Ground

0V

E143

27 - Ground

SDIA3371E

P1819 TRANSFER CONTROL DEVICE

DLN-51

< 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 control unit harness connector

terminals and ground.

OK or NG

OK

>> GO TO 2.

NG

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

or replace damaged parts.

• 10A fuse (No. 59, located in the fuse and relay block).

• Harness for short or open between battery and transfer shut off relay 1 harness connector E46

terminal 5.

• Harness for short or open between transfer control unit harness connector E143 terminal 27 and

transfer shut off relay 1 harness connector E46 terminal 3.

• Harness for short or open between ignition switch and transfer shut off relay 1 harness connec-

tor E46 terminal 2.

• Harness for short or open between transfer shut off relay 1 harness connector E46 terminal 1

and ground.

• Harness for short or open between ignition switch and transfer control unit harness connector

E142 terminal 25.

• Battery and ignition switch.

• Transfer shut off relay 1. Refer to 

DLN-22, "Component Inspection"

.

2.

CHECK GROUND CIRCUIT

1. Turn ignition switch OFF (stay for at least 5 seconds).

2. Disconnect transfer control unit harness connector.

3. Check continuity between transfer control unit harness connec-

tor E143 terminal 32 and ground.

Also check harness for short to power.

OK or NG

OK

>> GO TO 3.

NG

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

nectors.

3.

CHECK POWER SUPPLY SIGNAL

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

2. Connect transfer control unit harness connector.

3. Check voltage between transfer control unit harness connector

terminal and ground.

Connector

Terminal

Voltage (Approx.)

E142

25 - Ground

Battery voltage

E143

27 - Ground

SDIA3372E

Continuity should exist.

SDIA2818E

Connector

Terminal

Voltage (Approx.)

E143

40 - Ground

Battery voltage

SDIA2819E