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LAN-90
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
CAN SYSTEM (TYPE 3)PFP:23710
System DescriptionUKS000QY
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector LocationUKS000QZ
BKIA0120E
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CAN SYSTEM (TYPE 3)
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Revision: October 20052005 QX56
SchematicUKS000R0
BKWA0001E
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LAN-92
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
Wiring Diagram - CAN -UKS000R1
BKWA0401E
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LAN-94
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
BKWA0403E
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![INFINITI QX4 2005 Factory Service Manual CAN SYSTEM (TYPE 3)
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Revision: October 20052005 QX56
Work FlowUKS0019V
1. When there are no indications of “AUTO DRIVE POS.”, “BCM”, “HVAC”, “ALL M INFINITI QX4 2005 Factory Service Manual CAN SYSTEM (TYPE 3)
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Work FlowUKS0019V
1. When there are no indications of “AUTO DRIVE POS.”, “BCM”, “HVAC”, “ALL M](/manual-img/42/57035/w960_57035-2373.png)
CAN SYSTEM (TYPE 3)
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Revision: October 20052005 QX56
Work FlowUKS0019V
1. When there are no indications of “AUTO DRIVE POS.”, “BCM”, “HVAC”, “ALL MODE AWD/4WD” or
“IPDM E/R” on “SELECT SYSTEM” display of CONSULT-II, print the “SELECT SYSTEM”.
2. Print all the data of “SELF-DIAG RESULTS” for “ENGINE”, “A/T”, “AUTO DRIVE POS.”, “BCM”, “HVAC”,
“ALL MODE AWD/4WD”, “ABS” and “IPDM E/R” displayed on CONSULT-II.
3. Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “A/T”, “AUTO DRIVE POS.”, “BCM”,
“HVAC”, “ALL MODE AWD/4WD”, “ABS” and “IPDM E/R” displayed on CONSULT-II.
4. Attach the printed sheet of “SELECT SYSTEM”, “SELF-DIAG RESULTS” and “CAN DIAG SUPPORT
MNTR” onto the check sheet. Refer to LAN-97, "
CHECK SHEET" .
5. Based on the indications of “SELECT SYSTEM” and the results of “CAN DIAG SUPPORT MNTR”, puts a
check mark onto the items with “No indication”, “NG” or “UNKWN” in the check sheet table. Refer to LAN-
97, "CHECK SHEET" .
CAUTION:
“ALL MODE AWD/4WD” puts a check mark on the check
sheet when “Present” is “UNKWN” and “Past” is “0”.
PKIA2093E
PKIA8260E
PKIA8343E
SKIB3244E
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![INFINITI QX4 2005 Factory Service Manual LAN-96
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” as “CAN DIAG SUPPORT MNTR” for the diag-
nosed control un INFINITI QX4 2005 Factory Service Manual LAN-96
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” as “CAN DIAG SUPPORT MNTR” for the diag-
nosed control un](/manual-img/42/57035/w960_57035-2374.png)
LAN-96
[CAN]
CAN SYSTEM (TYPE 3)
Revision: October 20052005 QX56
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” as “CAN DIAG SUPPORT MNTR” for the diag-
nosed control unit, replace the control unit.
The “CAN DIAG SUPPORT MNTR” items, which are not in check sheet table, are not related to diag-
nostic procedure on service manual.
So it is not necessary to check the status of the “CAN DIAG SUPPORT MNTR” items not in check
sheet table.
6. Check CAN communication line of the navigation system. Refer to AV-131, "
CAN Communication Line
Check" .
7. Attach the CAN DIAG SUPPORT MONITOR check sheet onto the check sheet. Refer to LAN-97,
"CHECK SHEET" .
8. Mark the “NG” or “UNKWN” item of the check sheet table with “v” from the result of CAN DIAG SUPPORT
MONITOR check sheet. Refer to LAN-97, "
CHECK SHEET" .
NOTE:
If “NG” is displayed on “CAN COMM” as “CAN DIAG SUPPORT MONITOR” for the diagnosed control
unit, replace the control unit. Refer to AV- 1 3 1 , "
CAN Communication Line Check" .
9. According to the check sheet results (example), start inspection. Refer to LAN-99, "
CHECK SHEET
RESULTS (EXAMPLE)" .
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CAN SYSTEM (TYPE 3)
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Revision: October 20052005 QX56
CHECK SHEET
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.
SKIB3364E