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LAN-6
[CAN]
PRECAUTIONS
Revision: 2005 July 2005 FX
Precautions For Harness RepairAKS0058J
CAN SYSTEM
Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in).]
Do not perform bypass wire connections for the repair parts.
(The spliced wire will become separated and the characteristics
of twisted line will be lost.)
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When Displaying CAN Communication System ErrorsAKS00CBN
WHEN A MALFUNCTION IS DETECTED BY CAN COMMUNICATION SYSTEM
CAN communication line is open. (CAN H, CAN L, or both)
CAN communication line is shorted. (Ground, between CAN lines, or other harnesses)
The areas related to CAN communication of unit is malfunctioning.
WHEN A MALFUNCTION IS DETECTED EXCEPT CAN COMMUNICATION SYSTEM
Removal and installation of parts: When the units that perform CAN communication or the sensors related
to CAN communication are removed and installed, malfunction may be detected (or DTC other than CAN
communication may be detected).
Fuse blown out (removed): CAN communication of the unit may be stopped at such time.
Low voltage: If the voltage decreases because of battery discharge when IGN is ON, malfunction may be
detected by self-diagnosis according to the units.
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LAN-8
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2005 July 2005 FX
TROUBLE DIAGNOSIS FLOW CHART
Depending on the control unit which performs CAN communication, “U1010” may be indicated as the result of
self-diagnosis. Replace the control unit if “U1010” is indicated.
Step 1: Refer to LAN-9, "SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)" .
Step 2: Refer to LAN-10, "ACQUISITION OF DATA BY CONSULT-II" .
Step 3: Refer to LAN-11, "HOW TO USE CHECK SHEET TABLE" .
Step 4: Refer to LAN-12, "Example of Filling in Check Sheet When Initial Conditions Are Reproduced" .
Step 5: Check and repair according to system diagnosis.
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Diagnosis ProcedureAKS00CBO
SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)
Determine CAN system type from the equipment of the vehicle to select applicable check sheet.
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LAN-10
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TROUBLE DIAGNOSES WORK FLOW
Revision: 2005 July 2005 FX
ACQUISITION OF DATA BY CONSULT-II
Attach the data acquired by CONSULT-II on the check sheet determined according to CAN system type.
(Transfer the data from the display screen of the vehicle to the CAN diagnosis monitor check sheet. For dis-
play unit: Refer to AV- 8 5 , "
CAN Communication Line Inspection" . For display control unit: Refer to AV- 1 5 5 ,
"CAN Communication Line Check" .)
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HOW TO USE CHECK SHEET TABLE
1. Unit names displayed on CONSULT-II
2. “No indication”: Put a check mark to it if the unit name described in step 1 is not displayed on “SELECT SYSTEM” screen of CONSULT-II. (Unit communicating with CONSULT-II via CAN communication line)
“–”: Column not used (Unit communicating with CONSULT-II excluding CAN communication line)
3. “NG”: Display “NG” when malfunction is detected in the initial diagnosis of the diagnosed unit. Replace the unit if “NG” is displayed.
“–”: Column not used (Initial diagnosis is not performed.)
4. “UNKWN”: Display “UNKWN” when the diagnosed unit does not transmit the data normally. Put a check mark to it if “UNKWN” is displayed on CONSULT-II.
5. “UNKWN”: Display “UNKWN” when the diagnosed unit does not receive the data normally. Put a check mark to it if “UNKWN” is displayed on CONSULT-II.
“–”: Column not used (It is not necessary for CAN communication trouble diagnosis.)
NOTE:
CAN communication diagnosis checks if CAN communication works normally. (Contents of data are not diag-
nosed.)
When the initial conditions are reproduced. Refer to LAN-12, "Example of Filling in Check Sheet When Ini-
tial Conditions Are Reproduced" .
When the initial conditions are not reproduced. Refer to LAN-16, "Example of Filling in Check Sheet When
Initial Conditions Are Not Reproduced" .
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Revision: 2005 July 2005 FX
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of unit INFINITI FX35 2005 Service Manual LAN-12
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Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of unit](/manual-img/42/57020/w960_57020-3430.png)
LAN-12
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2005 July 2005 FX
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of unit names listed on the column of diagnosis system selec-
tion screen of a check sheet table are not displayed on “SELECT SYSTEM” screen attached to the check
sheet.
NOTE:
Put a check mark to “No indication” of AUTO DRIVE POS. and IPDM E/R because AUTO DRIVE POS.
and IPDM E/R is not displayed on “SELECT SYSTEM” screen.
2. Confirm the unit name that “UNKWN” is displayed from the copy of “CAN DIAG SUPPORT MNTR” screen of “ENGINE” attached to the check sheet, and then put a check mark to the check sheet table.
NOTE:
In “CAN DIAG SUPPORT MNTR” screen, “UNKWN” is displayed on “ICC”, “IPDM E/R” and “AWD/4WD/
e4WD”. But put a check mark to “IPDM E/R” because “UNKWN” is listed on the column of reception diag-
nosis of the check sheet table.
3. Confirm the unit name that “UNKWN” is displayed on the copy of “CAN DIAG SUPPORT MNTR” screen of “A/T” as well as “ENGINE”. And then, put a check mark to the check sheet table.
NOTE:
For “A/T”, “UNKWN” is displayed on “AWD/4WD”. But, do not put a check mark to their columns of
reception diagnosis of the check sheet table because “UNKWN” is not listed.
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4. Display unit reads the CAN diagnosis monitor check sheet (B) AV- 8 5 , "CAN Communication Line Inspec-
tion" transferred from the display screen (A). The transferred CAN diagnosis monitor check sheet is cop-
ied to the Check sheet, and conversed according to the Display unit Translation Sheet. And then put a
check mark to the check sheet table.
NOTE:
In the CAN diagnosis monitor check sheet (B), check marks are put to “CAN7”. But, in the column of the
check sheet table indication in Display unit Translation Sheet (C), “IPDM E/R” is listed only for “CAN7”.
Therefore, put a check mark to “IPDM E/R” because “UNKWN” is listed on the column of reception diag-
nosis of the check sheet table.
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