Nissan X-Trail 32. Manual — part 2088

TM-310

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

U0073 COMMUNICATION BUS A OFF

DTC/CIRCUIT DIAGNOSIS

U0073 COMMUNICATION BUS A OFF

DTC Description

INFOID:0000000010622488

DTC DETECTION LOGIC

POSSIBLE CAUSE

Harness or connector (CAN communication line is error)

FAIL-SAFE

• Selector shock is large
• Start is slow
• Acceleration is slow
• Lock-up is not performed

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U0073” detected?

YES

>> Go to

TM-310, "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:0000000010622489

For the diagnosis procedure, refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U0073

COMM BUS A OFF
(Control Module Communication Bus A Off)

TCM communication blockage lasts for 2 seconds or more when turning
ON the ignition switch. (Communication not established.)

U0100 LOST COMMUNICATION (ECM A)

TM-311

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

U0100 LOST COMMUNICATION (ECM A)

DTC Description

INFOID:0000000010622490

DTC DETECTION LOGIC

POSSIBLE CAUSE

• ECM
• Harness or connector (CAN communication line is open or shorted)

FAIL-SAFE

• Selector shock is large
• Start is slow
• Acceleration is slow
• Lock-up is not performed

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U0100” detected?

YES

>> Go to

TM-311, "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:0000000010622491

For the diagnosis procedure, refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U0100

LOST COMM (ECM A)
(Lost Communication With ECM/PCM A)

When the ignition switch is ON, TCM is unable to receive the CAN
communications signal from ECM continuously for 2 seconds or more.

TM-312

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

U0102 LOST COMMUNICATION (TRANSFER)

U0102 LOST COMMUNICATION (TRANSFER)

DTC Description

INFOID:0000000010622492

DTC DETECTION LOGIC

POSSIBLE CAUSE

• AWD control unit
• Harness or connector (CAN communication line is open or shorted)

FAIL-SAFE

Not changed from normal driving

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U0102” detected?

YES

>> Go to

TM-312, "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:0000000010622493

For the diagnosis procedure, refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U0102

LOST COMM (TRANSFER)
(Lost Communication With Transfer Case Con-
trol Module)

When the ignition switch is ON, TCM is unable to receive the CAN com-
munications signal from AWD control unit continuously for 2 seconds or
more.

U0140 LOST COMMUNICATION (BCM)

TM-313

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10D]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

U0140 LOST COMMUNICATION (BCM)

DTC Description

INFOID:0000000010622494

DTC DETECTION LOGIC

POSSIBLE CAUSE

• BCM
• Harness or connector (CAN communication line is open or shorted)

FAIL-SAFE

Not changed from normal driving

DTC CONFIRMATION PROCEDURE

1.

PREPARATION BEFORE WORK

If another “DTC CONFIRMATION PROCEDURE” occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

1.

Start the engine and wait for at least 5 seconds.

2.

Check the DTC.

Is “U0140” detected?

YES

>> Go to

TM-313, "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:0000000010622495

For the diagnosis procedure, refer to

LAN-17, "Trouble Diagnosis Flow Chart"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

U0140

LOST COMM (BCM)
(Lost Communication With Body Control Mod-
ule)

When the ignition switch is ON, TCM is unable to receive the CAN com-
munications signal from BCM continuously for 2 seconds or more.