Nissan Versa Sedan. Manual - part 857

TM-334

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

U0073 COMMUNICATION BUS A OFF

DTC/CIRCUIT DIAGNOSIS

U0073 COMMUNICATION BUS A OFF

Description

INFOID:0000000009268121

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 malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links

with other control units during operation (not independently). In CAN communication, control units are con-

nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission

with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000009268122

DTC DETECTION LOGIC

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 “U0073” detected?

YES

>> Go to 

TM-334, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268123

For the diagnosis procedure, refer to 

LAN-15, "Trouble Diagnosis Flow Chart"

. 

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

U0073

Control Module Communica-
tion Bus A Off

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

Harness or connector
(CAN communication line is error)

U0100 LOST COMMUNICATION (ECM A)

TM-335

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

U0100 LOST COMMUNICATION (ECM A)

Description

INFOID:0000000009268124

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 malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links

with other control units during operation (not independently). In CAN communication, control units are con-

nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission

with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000009268125

DTC DETECTION LOGIC

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 first trip DTC.
Is “U0100” detected?

YES

>> Go to 

TM-335, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268126

For the diagnosis procedure, refer to 

LAN-15, "Trouble Diagnosis Flow Chart"

. 

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

U0100

Lost Communication With 
ECM/PCM A 

When the ignition switch is ON, TCM is un-
able to receive the CAN communications 
signal from ECM continuously for 2 sec-
onds or more.

• ECM
• Harness or connector

(CAN communication line is open or 
shorted)

TM-336

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

U0140 LOST COMMUNICATION (BCM)

U0140 LOST COMMUNICATION (BCM)

Description

INFOID:0000000009268127

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 malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links

with other control units during operation (not independently). In CAN communication, control units are con-

nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission

with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000009268128

DTC DETECTION LOGIC

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-336, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268129

For the diagnosis procedure, refer to 

LAN-15, "Trouble Diagnosis Flow Chart"

. 

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

U0140

Lost Communication With 
Body Control Module

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

• BCM
• Harness or connector

(CAN communication line is open or 
shorted)

U0141 LOST COMMUNICATION (BCM A)

TM-337

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

U0141 LOST COMMUNICATION (BCM A)

Description

INFOID:0000000009268130

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 malfunction detection ability.

Many electronic control units are equipped onto a vehicle, and each control unit shares information and links

with other control units during operation (not independently). In CAN communication, control units are con-

nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission

with less wiring. Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000009268131

DTC DETECTION LOGIC

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 “U0141” detected?

YES

>> Go to 

TM-334, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009268132

For the diagnosis procedure, refer to 

LAN-15, "Trouble Diagnosis Flow Chart"

. 

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

U0141

Lost Communication With 
Body Control Module A

When the ignition switch is turned ON, TCM 
continues no reception of the CAN communi-
cation signal from IPDM E/R for 2 seconds or 
more. 

• IPDM  E/R
• Harness or connector

(CAN communication line is open or 
shorted)