Nissan Frontier. Instruction — part 287

DLN-50

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1819 TRANSFER CONTROL DEVICE

P1819 TRANSFER CONTROL DEVICE

Description

INFOID:0000000009479673

The transfer control device integrates the actuator motor and actuator position switch. DTC P1819 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:0000000009479674

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1819 detected?

YES

>> Perform diagnosis procedure. Refer to

DLN-50, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479675

Regarding Wiring Diagram information, refer to

DLN-63, "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

Connector

Terminal

Voltage (Approx.)

M152

25 - Ground

0V

M153

27 - Ground

SDIA3371E

P1819 TRANSFER CONTROL DEVICE

DLN-51

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

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

5. Check voltage between transfer control unit harness connector

terminals and ground.

Are the inspection results normal?

YES

>> GO TO 2.

NO

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

or replace damaged parts.

• 10A fuse (No. 57, located in the fuse and relay box).

• 40A fuse (No. J, located in the fuse and fusible link box).

• Harness for short or open between battery and transfer shut off relay 1 harness connector E156

terminal 3.

• Harness for short or open between transfer control unit harness connector M153 terminal 27

and transfer shut off relay 1 harness connector E156 terminal 5.

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

tor E156 terminal 1.

• Harness for short or open between transfer shut off relay 1 harness connector E156 terminal 2

and ground.

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

M152 terminal 25.

• Battery and ignition switch.

• Transfer shut off relay 1. Refer to

DLN-23, "Component Inspection"

.

2.

CHECK GROUND CIRCUIT

1. Turn ignition switch "OFF".

2. Disconnect transfer control unit harness connector.

3. Check continuity between transfer control unit harness connec-

tor M153 terminal 32 and ground.

Also check harness for short to power.

Is there continuity?

YES

>> GO TO 3.

NO

>> 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.)

M152

25 - Ground

Battery voltage

M153

27 - Ground

SDIA3372E

Continuity should exist.

SDIA2818E

Connector

Terminal

Voltage (Approx.)

M153

40 - Ground

Battery voltage

SDIA2819E

DLN-52

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

P1819 TRANSFER CONTROL DEVICE

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

5. Check voltage between transfer control unit harness connector

terminal 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 battery and trans-

fer shut off relay 2 harness connector E157 terminal 1.

• Harness for short or open between transfer shut off relay 2 harness connector E157 terminal 2

and transfer control unit harness connector M153 terminal 40.

• Transfer shut off relay 2.

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 (With CONSULT) or GO TO 6 (Without CONSULT).

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.

PERFORM SELF-DIAGNOSIS (WITH CONSULT)

With CONSULT

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

2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT.

3. Touch “ERASE”.

4. Turn ignition switch “OFF” and wait at least 10 seconds.

5. Perform the self-diagnosis again.
Is the “SHIFT ACT CIR [P1819]” displayed?

YES

>> Replace transfer control unit. Refer to

DLN-92, "Removal and Installation"

.

NO

>> Inspection End.

6.

PERFORM SELF-DIAGNOSIS (WITHOUT CONSULT)

Without CONSULT

1. Perform the self-diagnosis and then erase self-diagnostic results. Refer to

DLN-17, "CONSULT Function

(ALL MODE AWD/4WD)"

.

2. Perform the self-diagnosis again.
Do the self-diagnostic results indicate transfer control device?

YES

>> Replace transfer control unit. Refer to

DLN-92, "Removal and Installation"

.

NO

>> Inspection End.

Connector

Terminal

Voltage (Approx.)

M153

40 - Ground

0V

SDIA2820E

P1820 ENGINE SPEED SIGNAL

DLN-53

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TX15B]

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P1820 ENGINE SPEED SIGNAL

Description

INFOID:0000000009479676

The ECM transmits the engine speed signal via CAN communication to the transfer control unit. DTC P1820

will set when either of the following occur:

• Malfunction is detected in engine speed signal that is output from the ECM.

• Improper signal is input while driving.

DTC Logic

INFOID:0000000009479677

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Perform self-diagnosis.
Is DTC P1820 detected?

YES

>> Perform diagnosis procedure. Refer to

DLN-53, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479678

1.

CHECK DTC WITH ECM

Perform self-diagnosis with ECM. Refer to

EC-518, "CONSULT Function"

.

Is any malfunction detected by self-diagnosis?

YES

>> Check the malfunctioning system.

NO

>> GO TO 2.

2.

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 3.

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.

3.

CHECK DTC

Perform the self-diagnosis, after driving a vehicle for a while.
Is DTC P1820 displayed?

YES

>> Perform self-diagnosis with ECM again.

NO

>> Inspection End.

DTC

CONSULT

Diagnostic item is detected when...

Reference

[P1820]

ENGINE SPEED SIG

• Malfunction is detected in engine

speed signal that is output from ECM
through CAN communication.

• Improper signal is input while driving.

DLN-53