Nissan X-Trail 32. Manual - part 689

U1010 CONTROL UNIT (CAN)

DLN-167

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

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U1010 CONTROL UNIT (CAN)

DTC Description

INFOID:0000000011004025

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit communicate data but selectively reads required data only.

DTC DETECTION LOGIC

POSSIBLE CAUSE

Internal malfunction of 4WD control unit

FAIL-SAFE

4WD control changes to front-wheel drive gradually (rear-wheels still have some driving torque), then 4WD
control stops, and the vehicle becomes front-wheel drive.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

DTC REPRODUCTION PROCEDURE

With CONSULT

1.

Turn the ignition switch OFF to ON.

2.

Perform self-diagnosis for “ALL MODE AWD/4WD”.

Is DTC “U1010” detected?

YES 

>> Proceed to diagnosis procedure. Refer to 

DLN-167, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000011004026

1.

CHECK 4WD CONTROL UNIT

Check 4WD control unit harness connector for disconnection and deformation.

Is the inspection result normal? 

YES

>> Replace 4WD control unit. Refer to 

DLN-179, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

U1010

CONTROL UNIT (CAN)
[Control unit (CAN)]

Detecting error during the initial diagnosis of CAN controller 
of 4WD control unit.

DLN-168

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000011004027

1.

CHECK 4WD CONTROL UNIT POWER SUPPLY (1)

1.

Turn the ignition switch OFF.

2.

Disconnect 4WD control unit harness connector.

3.

Check the voltage between 4WD control unit harness connector and ground.

4.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

5.

Check the voltage between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK 4WD CONTROL UNIT POWER SUPPLY (2)

1.

Turn the ignition switch OFF.

2.

Check the 10A fuse (#30).

3.

Disconnect fuse block (J/B) harness connector.

4.

Check the continuity between 4WD control unit harness connector and fuse block (J/B) harness connec-
tor.

5.

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for ignition power supply circuit. Refer to 

PG-52, "Wiring Diagram -

IGNITION POWER SUPPLY -"

.

NO

>> Repair or replace error-detected parts.

3.

CHECK 4WD CONTROL UNIT POWER SUPPLY (3)

1.

Turn the ignition switch OFF.

2.

Check the voltage between 4WD control unit harness connector and ground.

3.

Turn the ignition switch ON.

4WD control unit

—

Voltage (Approx.)

Connector

Terminal

B5

7

Ground

0 V

4WD control unit

—

Voltage 

Connector

Terminal

B5

7

Ground

Battery voltage

4WD control unit

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

B5

7

M3

7C

Existed

4WD control unit

—

Continuity

Connector

Terminal

B5

7

Ground

Not existed

4WD control unit

—

Voltage (Approx.)

Connector

Terminal

B5

15

Ground

Battery voltage

POWER SUPPLY AND GROUND CIRCUIT

DLN-169

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

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CAUTION:

Never start the engine.

4.

Check the voltage between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

CHECK 4WD CONTROL UNIT POWER SUPPLY (4)

1.

Turn the ignition switch OFF.

2.

Check the 5A fuse (#2).

3.

Disconnect fuse block (J/B) harness connector.

4.

Check the continuity between 4WD control unit harness connector and fuse block (J/B) harness connec-
tor.

5.

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit. Refer to 

PG-12, "Wiring Diagram - BAT-

TERY POWER SUPPLY -"

.

NO

>> Repair or replace error-detected parts.

5.

CHECK 4WD SOLENOID POWER SUPPLY (1)

1.

Turn the ignition switch OFF.

2.

Check the voltage between 4WD control unit harness connector and ground.

3.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

4.

Check the voltage between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

CHECK 4WD SOLENOID POWER SUPPLY (2)

1.

Turn the ignition switch OFF.

4WD control unit

—

Voltage 

Connector

Terminal

B5

15

Ground

Battery voltage

4WD control unit

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

B5

15

B107

6H

Existed

4WD control unit

—

Continuity

Connector

Terminal

B5

15

Ground

Not existed

4WD control unit

—

Voltage

Connector

Terminal

B5

9

Ground

Battery voltage

4WD control unit

—

Voltage

Connector

Terminal

B5

9

Ground

Battery voltage

DLN-170

< DTC/CIRCUIT DIAGNOSIS >

[TRANSFER: TY30A]

POWER SUPPLY AND GROUND CIRCUIT

2.

Check the 10A fuse (#6).

3.

Disconnect fuse block (J/B) harness connector.

4.

Check the continuity between 4WD control unit harness connector and fuse block (J/B) harness connec-
tor.

5.

Check the continuity between 4WD control unit harness connector and the ground.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit. Refer to 

PG-12, "Wiring Diagram - BAT-

TERY POWER SUPPLY -"

.

NO

>> Repair or replace error-detected parts.

7.

CHECK 4WD CONTROL UNIT GROUND

1.

Turn the ignition switch OFF.

2.

Check the continuity between 4WD control unit harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace error-detected parts.

4WD control unit

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

B5

9

M2

15B

Existed

4WD control unit

—

Continuity

Connector

Terminal

B5

9

Ground

Not existed

4WD control unit

—

Continuity

Connector

Terminal

B5

10

Ground

Existed

11