Page 2273 of 3383
LAN-4
[CAN]
PRECAUTIONS
Revision: November 20092006 QX56
Precautions For Harness RepairUKS0017L
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.)
PKIA0306E
PKIA0307E
Page 2274 of 3383
![INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSES WORK FLOWLAN-5
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
TROUBLE DIAGNOSES WORK FLOWPFP:00004
When Displaying CAN Communication System ErrorsUKS004SS
WHEN A INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSES WORK FLOWLAN-5
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
TROUBLE DIAGNOSES WORK FLOWPFP:00004
When Displaying CAN Communication System ErrorsUKS004SS
WHEN A](/manual-img/42/57028/w960_57028-2273.png)
TROUBLE DIAGNOSES WORK FLOWLAN-5
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
TROUBLE DIAGNOSES WORK FLOWPFP:00004
When Displaying CAN Communication System ErrorsUKS004SS
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.
Page 2275 of 3383
LAN-6
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
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-7, "SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)" .
Step 2: Refer to LAN-8, "ACQUISITION OF DATA BY CONSULT-II" .
Step 3: Refer to LAN-9, "HOW TO USE CHECK SHEET TABLE" .
Step 4: Refer to LAN-10, "Example of Filling in Check Sheet When Initial Conditions Are Reproduced" .
Step 5: Refer to LAN-123, "TROUBLE DIAGNOSIS FOR SYSTEM" .
PKIC3663E
Page 2276 of 3383
TROUBLE DIAGNOSES WORK FLOWLAN-7
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
Diagnosis ProcedureUKS004ST
SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)
Determine CAN system type from the equipment of the vehicle to select applicable check sheet.
PKIC3664E
Page 2277 of 3383
LAN-8
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
ACQUISITION OF DATA BY CONSULT-II
Attach the data acquired by CONSULT-II on the check sheet determined according to CAN system type.(For
display control unit, transfer the data from the display screen of the vehicle to the CAN diagnosis support mon-
itor check sheet AV- 1 4 0 , "
CAN Communication Line Check" .)
PKIC4971E
Page 2278 of 3383
![INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSES WORK FLOWLAN-9
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
HOW TO USE CHECK SHEET TABLE
1. Unit names displayed on CONSULT-II
2.“No indication ”: Put a che INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSES WORK FLOWLAN-9
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
HOW TO USE CHECK SHEET TABLE
1. Unit names displayed on CONSULT-II
2.“No indication ”: Put a che](/manual-img/42/57028/w960_57028-2277.png)
TROUBLE DIAGNOSES WORK FLOWLAN-9
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
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.
“–” : Column not used (Transmit diagnosis is not performed.)
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-10, "Example of Filling in Check Sheet When Ini-
tial Conditions Are Reproduced" .
When the initial conditions are not reproduced, refer to LAN-14, "Example of Filling in Check Sheet When
Initial Conditions Are Not Reproduced" .
PKIC3656E
Page 2279 of 3383
![INFINITI QX56 2006 Factory Service Manual LAN-10
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of INFINITI QX56 2006 Factory Service Manual LAN-10
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of](/manual-img/42/57028/w960_57028-2278.png)
LAN-10
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
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. because AUTO DRIVE POS. 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 “VDC/TCS/ABS”, “METER/M&A ”,
“BCM/SEC ” and “IPDM E/R ”. Put a check mark to it.
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 “VDC/TCS/ABS”, “METER/M&A ”, “ICC/e4WD ” and “AWD/4WD ”.
But put a check mark to “VDC/TCS/ABS” and “METER/M&A ” because “UNKWN ” is listed on the col-
umn of reception diagnosis of the check sheet table.
PKIC4972E
Page 2280 of 3383
TROUBLE DIAGNOSES WORK FLOWLAN-11
[CAN]
C
DE
F
G H
I
J
L
M A
B
LAN
Revision: November 2009 2006 QX56
4. Display control unit reads the CAN diagnosis support monitor check sheet (B) AV- 1 4 0 , "CAN Communi-
cation Line Check" transferred from the display screen (A). The transferred CAN diagnosis support mon-
itor check sheet is copied to the Check sheet, and conversed according to the Display control unit
Translation Sheet (C). And then put a check mark to the check sheet table.
NOTE:
In the CAN diagnosis support monitor check sheet (B), check marks are put to “CAN CIRC 3”, “CAN CIRC
6 ”, “CAN CIRC 8 ” and “CAN CIRC 9 ”. But, in the column of the check sheet table indication in Display
control unit Translation Sheet (C), “ECM” is listed only for “CAN CIRC 3”. Therefore, put a check mark to
“ECM ” because “UNKWN” is listed on the column of reception diagnosis of the check sheet table.
PKIC3658E