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• Response to the system call
• Control unit diagnosis information
• Self-diagnosis
• CAN dia NISSAN NOTE 2016 Service Repair Manual LAN
TROUBLE DIAGNOSISLAN-13
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• Response to the system call
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• Self-diagnosis
• CAN dia](/manual-img/5/57363/w960_57363-2200.png)
LAN
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< SYSTEM DESCRIPTION > [CAN FUNDAMENTAL]
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• Response to the system call
• Control unit diagnosis information
• Self-diagnosis
• CAN diagnostic support monitor
Self-DiagnosisINFOID:0000000012433336
If communication signals cannot be transmitted or rece
ived among control units communicating via CAN com-
munication line, CAN communication-related DTC is displayed on the CONSULT “Self Diagnostic Result”
screen.
NOTE:
The following table shows examples of CAN communicati on-related DTC. For other DTC, refer to the applica-
ble sections.
CAN Diagnostic Support MonitorINFOID:0000000012433337
MONITOR ITEM (CONSULT)
Example: CAN DIAG SUPPORT MNTR indication
Without PAST
DTC Self-diagnosis item
(CONSULT indication) DTC detection condition
Inspection/Action
U1000 CAN COMM CIRCUIT ECM
When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-relat-
ed diagnosis) for 2 seconds or more.
Start the inspection. Re-
fer to the applicable sec-
tion of the indicated
control unit.
Except
for ECM
When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.
U1001 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN communi-
cation signal other than OBD (emission-related diagnosis)
for 2 seconds or more.
U1002 SYSTEM COMM When a control unit is not transmitting or receiving CAN
communication signal for 2 seconds or less.
U1010 CONTROL UNIT(CAN) When an error is detected during the initial diagnosis for
CAN controller of each control unit. Replace the control unit
indicating “U1010”.
JSMIA0964GB
Item
PRESENT Description
Initial diagnosis OK Normal at present
NG Control unit e rror (Except for some control units)
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![NISSAN NOTE 2016 Service Repair Manual LAN-14
< SYSTEM DESCRIPTION >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
With PAST
Transmission diagnosisOK Normal at present
UNKWN Unable to transmit signals for 2 seconds or more.
Diagnosis not performed
Co NISSAN NOTE 2016 Service Repair Manual LAN-14
< SYSTEM DESCRIPTION >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
With PAST
Transmission diagnosisOK Normal at present
UNKWN Unable to transmit signals for 2 seconds or more.
Diagnosis not performed
Co](/manual-img/5/57363/w960_57363-2201.png)
LAN-14
< SYSTEM DESCRIPTION >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
With PAST
Transmission diagnosisOK 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
ItemPRESENT PAST Description
Transmission diagnosis OKOK 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)
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How to Use CAN Communication Signal ChartINFOID:0000000012433338
The CAN communication signal chart lists the signals trans
mitted/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
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LAN-16
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Trouble Diagnosis Flow ChartINFOID:0000000012433339
DESCRIPTION
DETAIL OF TROUBLE DIAGNOSIS FLOW CHART
1.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 me ter is judged normal if the customer indicates
tachometer functions normally.
JSMIA0528GB
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• When a CAN communication system error is present, multiple control units may malfunctio NISSAN NOTE 2016 Service Repair Manual LAN
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• When a CAN communication system error is present, multiple control units may malfunctio](/manual-img/5/57363/w960_57363-2204.png)
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DIAGNOSIS AND REPAIR WORKFLOWLAN-17
< BASIC INSPECTION > [CAN FUNDAMENTAL]
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• When a CAN communication system error is present, multiple control units may malfunction or go into fail-
safe mode.
• 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.
>> GO TO 2.
2.INSPECTION OF VEHICLE CONDITION
Check whether the symptom is reproduced or not.
NOTE:
Do not turn the ignition switch OFF or disconnect the 12V battery cable while reproducing the error. The error
may temporarily correct itself, making it difficult to determine the root cause.
>> GO TO 3.
3.CHECK OF CAN SYSTEM TYPE (H OW 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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LAN-18
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
CAN system type is easily checked with the vehicle equi
pment identification information shown in the chart.
• CAN System Type Specification Chart (Style B) NOTE:
JSMIA0529GB
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LAN
DIAGNOSIS AND REPAIR WORKFLOWLAN-19
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CAN system type is easily checked with the vehicle equi
pment identification information shown in the chart.
>> GO TO 4.
4.CREATE INTERVIEW SHEET
Fill out the symptom described by the customer, vehicle condition, and CAN system type on the interview
sheet.
NOTE:
JSMIA0530GB
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LAN-20
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
Interview Sheet (Example)
>> GO TO 5.
5.DETECT THE ROOT CAUSE
CAN diagnosis function of CONSULT detects a root cause.
>> GO TO 6.
6.REPAIR OR REPLACE MALFUNCTIONING PART
Repair or replace malfunctioning parts ident ified by CAN diagnosis function of CONSULT.
Main line>>Refer to LAN-40, "
Main Line".
Branch line>>Refer to LAN-40, "
Branch Line".
Short circuit>>Refer to LAN-40, "
Short Circuit".
JSMIA0531GB
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