INFINITI QX4 2005 Factory Service Manual

LAN-132
[CAN]
CAN SYSTEM (TYPE 4)
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-133,
"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-133, "
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-136, "
CHECK SHEET
RESULTS (EXAMPLE)" .

CAN SYSTEM (TYPE 4)
LAN-133
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
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.
SKIB3382E

LAN-134
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
SKIB3453E

CAN SYSTEM (TYPE 4)
LAN-135
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
SKIB3454E

LAN-136
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
CHECK SHEET RESULTS (EXAMPLE)
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.
Case 1
Check harness between TCM and ICC sensor. Refer to LAN-156, "Circuit Check Between TCM and ICC Sen-
sor" .
SKIB3383E
PKIA8818E

CAN SYSTEM (TYPE 4)
LAN-137
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 2
Check harness between ICC sensor and ICC unit. Refer to LAN-157, "Circuit Check Between ICC Sensor and
ICC Unit" .
SKIB3384E
PKIA8819E

LAN-138
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
Case 3
Check harness between ICC unit and driver seat control unit. Refer to LAN-158, "Circuit Check Between ICC
Unit and Driver Seat Control Unit" .
SKIB3385E
PKIA8820E

CAN SYSTEM (TYPE 4)
LAN-139
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 4
Check harness between driver seat control unit and data link connector. Refer to LAN-158, "Circuit Check
Between Driver Seat Control Unit and Data Link Connector" .
SKIB3386E
PKIA8821E

LAN-140
[CAN]
CAN SYSTEM (TYPE 4)
Revision: October 20052005 QX56
Case 5
Check harness between data link connector and IPDM E/R. Refer to LAN-159, "Circuit Check Between Data
Link Connector and IPDM E/R" .
SKIB3387E
PKIA8822E

CAN SYSTEM (TYPE 4)
LAN-141
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: October 20052005 QX56
Case 6
Check ECM circuit. Refer to LAN-160, "ECM Circuit Check" .
SKIB3388E
PKIA8823E