Nissan Sentra. Manual — part 879
TM-152
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
U0073 COMMUNICATION BUS A OFF
DTC/CIRCUIT DIAGNOSIS
U0073 COMMUNICATION BUS A OFF
DTC Logic
INFOID:0000000009759382
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 DTC.
Is “U0073” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759383
For the diagnosis procedure, refer to
LAN-16, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U0073
COMM BUS A OFF
(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-153
< 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)
DTC Logic
INFOID:0000000009759384
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 DTC.
Is “U0100” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759385
For the diagnosis procedure, refer to
LAN-16, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
[Trouble diagnosis content]
DTC detection condition
Possible causes
U0100
LOST COMM (ECM A)
[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-154
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F11A]
U0140 LOST COMMUNICATION (BCM)
U0140 LOST COMMUNICATION (BCM)
DTC Logic
INFOID:0000000009759386
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759387
For the diagnosis procedure, refer to
LAN-16, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
[Trouble diagnosis content]
DTC detection condition
Possible causes
U0140
LOST COMM (BCM)
[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-155
< 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)
DTC Logic
INFOID:0000000009759388
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009759389
For the diagnosis procedure, refer to
LAN-16, "Trouble Diagnosis Flow Chart"
DTC
CONSULT screen terms
[Trouble diagnosis content]
DTC detection condition
Possible causes
U0141
LOST COMM (BCM A)
[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)
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