Nissan Note E12. Manual — part 413
LAN
TROUBLE DIAGNOSIS
LAN-13
< SYSTEM DESCRIPTION >
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
With PAST
Transmission diagnosis
OK
Normal at present
UNKWN
Unable to transmit signals for 2 seconds or more.
Diagnosis not performed
Control unit name
(Reception diagnosis)
OK
Normal at present
UNKWN
Unable to receive signals for 2 seconds or more.
Diagnosis not performed
No control unit for receiving signals. (No applicable optional parts)
Item
PRESENT
Description
Item
PRESENT
PAST
Description
Transmission diagnosis
OK
OK
Normal at present and in the past
1 – 39
Normal at present, but unable to transmit signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)
UNKWN
0
Unable to transmit signals for 2 seconds or more at present.
Control unit name
(Reception diagnosis)
OK
OK
Normal at present and in the past
1 – 39
Normal at present, but unable to receive signals for 2 seconds or more
in the past. (The number indicates the number of ignition switch cycles
from OFF to ON.)
UNKWN
0
Unable to receive signals for 2 seconds or more at present.
Not diagnosed
–
Diagnosis not performed.
No control unit for receiving signals. (No applicable optional parts)
LAN-14
< SYSTEM DESCRIPTION >
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
How to Use CAN Communication Signal Chart
INFOID:0000000009014730
The CAN communication signal chart lists the signals transmitted/received among control units. It is useful for
detecting the root cause by finding a signal related to the symptom, and by checking transmission and recep-
tion unit.
JSMIA0446GB
LAN
DIAGNOSIS AND REPAIR WORKFLOW
LAN-15
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Trouble Diagnosis Flow Chart
INFOID:0000000009014731
Trouble Diagnosis Procedure
INFOID:0000000009014732
INTERVIEW WITH CUSTOMER
Interview with the customer is important to detect the root cause of CAN communication system errors and to
understand vehicle condition and symptoms for proper trouble diagnosis.
Points in interview
• What: Parts name, system name
• When: Date, Frequency
• Where: Road condition, Place
• In what condition: Driving condition/environment
• Result: Symptom
Notes for checking error symptoms:
• Check normal units as well as error symptoms.
- Example: Circuit between ECM and the combination meter is judged normal if the customer indicates
tachometer functions normally.
• When a CAN communication system error is present, multiple control units may malfunction or go into fail-
safe mode.
JSMIA0528GB
LAN-16
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
• Indication of the combination meter is important to detect the root cause because it is the most obvious to
the customer, and it performs CAN communication with many units.
INSPECTION OF VEHICLE CONDITION
Check whether the symptom is reproduced or not.
NOTE:
Do not turn the ignition switch OFF or disconnect the battery cable while reproducing the error. The error may
temporarily correct itself, making it difficult to determine the root cause.
CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART)
Determine CAN system type based on vehicle equipment.
NOTE:
• This chart is used if CONSULT does not automatically recognize CAN system type.
• There are two styles for CAN system type specification charts. Depending on the number of available sys-
tem types, either style A or style B may be used.
CAN System Type Specification Chart (Style A)
NOTE:
SKIB8717E
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