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CAN Diagnostic Support MonitorNKS004MF
CONSULT-II and CAN diagnostic support moni INFINITI FX35 2007 Service Manual TROUBLE DIAGNOSIS LAN-13
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CAN Diagnostic Support MonitorNKS004MF
CONSULT-II and CAN diagnostic support moni](/manual-img/42/57018/w960_57018-3376.png)
TROUBLE DIAGNOSIS LAN-13
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CAN Diagnostic Support MonitorNKS004MF
CONSULT-II and CAN diagnostic support monitor (on-board diagnosis function) are used for detecting root
cause.
MONITOR ITEM (CONSULT-II)
Example: CAN DIAG SUPPORT MNTR indication
Without PAST
With PAST
SKIB8742E
Item PRSNT Description
Initial diagnosis OK Normal at present
NG Control unit error (Except for some control units)
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 PRSNT 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
–– Diagnosis not performed.
No control unit for receiving signals. (No applicable optional parts)
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LAN-14
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TROUBLE DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
MONITOR ITEM (ON-BOARD DIAGNOSIS)
NOTE:
For some models, CAN communication diagnosis result is received from the vehicle monitor. (CONSULT-II is
not available.)
Example: Vehicle Display
Item Result indi-
cated Error counter Description
CAN_COMM
(Initial diagnosis) OK 0 Normal at present
NG 1 – 50 Control unit error
(The number indicates how many times diagnosis has been
run.)
CAN_CIRC_1
(Transmission diagnosis) OK 0 Normal at present
UNKWN 1 – 50 Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)
CAN_CIRC_2 – 9
(Reception diagnosis of each unit) OK 0 Normal at present
UNKWN 1 – 50 Unable to transmit for 2 seconds or more at present.
(The number indicates how many times diagnosis has been
run.)
Diagnosis not performed.
No control unit for receiving signals. (No applicable optional
parts)
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TROUBLE DIAGNOSES WORK FLOWPFP:00004
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TROUBLE DIAGNOSES WORK FLOWPFP:00004
Information Needed for Trouble Dia](/manual-img/42/57018/w960_57018-3378.png)
TROUBLE DIAGNOSES WORK FLOW LAN-15
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TROUBLE DIAGNOSES WORK FLOWPFP:00004
Information Needed for Trouble DiagnosisNKS004MG
CAN communication system performs trouble diagnosis with the following tools.
How to Use CAN Communication Signal ChartNKS004MH
The CAN communication signal chart lists the signals needed for trouble diagnosis. It is useful for detecting
the root cause by finding a signal related to the symptom, and by checking transmission and reception unit.
Tool Usage
Interview sheet For filling in vehicle information and interview with customer.
Data sheet For attaching CONSULT-II data or on-board diagnosis data.
Diagnosis sheet For detecting the root cause. (Diagnosis sheet includes system diagram for every CAN system
type)
SELECT SYSTEM
(CONSULT-II)
For checking the condition of control units and the status of CAN communication.
SELF-DIAG RESULTS
(CONSULT-II)
CAN DIAG SUPPORT MNTR
(CONSULT-II)
CAN communication signal
chart For converting information received from a customer into CAN communication signal transmission
and reception. This information can be used to judge whether a circuit between control units is nor-
mal or abnormal.
Abbreviation list For checking abbreviations in CAN communication signal chart and diagnosis sheet.
SKIB8715E
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LAN-16
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TROUBLE DIAGNOSES WORK FLOW
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Trouble Diagnosis Flow ChartNKS004MI
SKIB8716E
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Trouble Diagnosis ProcedureNKS004MJ
INTERVIEW WITH CUSTOMER
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Trouble Diagnosis ProcedureNKS004MJ
INTERVIEW WITH CUSTOMER
Interview w](/manual-img/42/57018/w960_57018-3380.png)
TROUBLE DIAGNOSES WORK FLOW LAN-17
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Trouble Diagnosis ProcedureNKS004MJ
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
NOTE:
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.
Indication of the combination meter is important to detect the root cause because it is the most obvious
from the customer, and it performs CAN communication with many units.
SKIB8717E
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LAN-18
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TROUBLE DIAGNOSES WORK FLOW
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INSPECTION OF VEHICLE CONDITION
Check whether or not “U1000” or “U1001” is indicated on “SELF-DIAG RESULTS” by CONSULT-II.
NOTE:
Root cause cannot be detected using the procedure in this section if “U1000” or “U1001” is not indicated.
Check whether the symptom is reproduced or not.
NOTE:
Never turn the ignition switch OFF or disconnect the battery cable while the reproducing the error. The
error may temporarily correct itself, making it difficult to determine the root cause.
The procedures for present errors differ from the procedures for past errors. Refer to LAN-25,
"DETECT THE ROOT CAUSE" .
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CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION CHART)
Determine CAN system type based on vehicle equipment. Then choose the correct diagnosis sheet.
NOTE:
There are two styles for CAN system type specification charts. Depending on the number of available system
types, either style A or style B may be used.
CAN System Type Specification Chart (Style A)
NOTE:
CAN system type is easily checked with the vehicle equipment identification information shown in the chart.
SKIB8888E
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LAN-20
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CAN System Type Specification Chart (Style B)
NOTE:
CAN system type is easily checked with the vehicle equipment identification information shown in the chart.
SKIB8889E