Nissan Rogue. Manual — part 477

EC-176

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

U1044 ENG COMM CIRCUIT

U1044 ENG COMM CIRCUIT

DTC Description

INFOID:0000000011277926

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

(LIN communication circuit is open or shorted.)

• Generator

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted. always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition ON and wait at least 10 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EC-176, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011277927

1.

CHECK LIN COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector and generator harness connector.

3. Check the continuity between ECM harness connector and generator harness connector.

4. Also check harness for short to power and short to ground.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

REPLACE GENERATOR

1. Replace generator. Refer to

CHG-20, "Removal and Installation"

.

2. Erase DTC.

3. Perform DTC confirmation procedure again. Refer to

EC-176, "DTC Description"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

U1044

ENG COMM CIRCUIT
(Engine communication circuit)

A signal voltage of LIN communication between ECM and generator is excessively
low or excessively high.

+

−

Continuity

ECM

Generator

Connector

Terminal

Connector

Terminal

F52

85

F31

2

Existed

U1044 ENG COMM CIRCUIT

EC-177

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is DTC detected again?

YES

>> Replace ECM. Refer to

EC-502, "Removal and Installation"

.

NO

>> INSPECTION END

EC-178

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

U1050, U1051 LIN COMMUNICATION

U1050, U1051 LIN COMMUNICATION

DTC Description

INFOID:0000000011277928

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

(LIN communication circuit is open or shorted.)

• Generator

• ECM

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted. always perform the following procedure

before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition ON and wait at least 10 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to

EC-178, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000011277929

1.

CHECK LIN COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector and generator harness connector.

3. Check the continuity between ECM harness connector and generator harness connector.

4. Also check harness for short to power and short to ground.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

REPLACE GENERATOR

1. Replace generator. Refer to

CHG-20, "Removal and Installation"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

U1050

LIN COMMUNICATION
[LIN (Local Interconnect Network) commu-
nication)]

ECM detects LIN communication error.

U1051

+

−

Continuity

ECM

Generator

Connector

Terminal

Connector

Terminal

F52

85

F31

2

Existed

U1050, U1051 LIN COMMUNICATION

EC-179

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2. Erase DTC.

3. Perform DTC confirmation procedure again. Refer to

EC-178, "DTC Description"

.

Is DTC detected again?

YES

>> Replace ECM. Refer to

EC-502, "Removal and Installation"

.

NO

>> INSPECTION END