INFINITI FX35 2004 Service Manual

LAN-20
[CAN]
CAN COMMUNICATION
Revision: 2004 November 2004 FX35/FX45
*: VK45DE engine model onlyA/T CHECK indica-
tor lamp signalTR
A/T position indica-
tor lamp signalTR
A/T shift schedule
change demand sig-
nalRT
Manual mode signal R T
Not manual mode
signalRT
Manual mode shift up
signalRT
Manual mode shift
down signalRT
Manual mode indica-
tor signalTR
Ignition knob switch
signalTR
Snow mode switch
signalRT
Current gear posi-
tion signal*RT
Next gear position
signal*RT
Shift change signal* R T
Shift pattern signal* R TSignals ECM TCMDis-
play
con-
trol
unitLow
tire
pres-
sure
warn-
ing
con-
trol
unitAWD
con-
trol
unitICC
unitIntel-
ligent
Key
unitBCMStee r-
ing
angle
sen-
sorUni-
fied
meter
and
A/C
amp.ICC
sen-
sorABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R

CAN SYSTEM (TYPE 1)
LAN-21
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
CAN SYSTEM (TYPE 1)PFP:23710
System DescriptionAKS00BZ7
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 LocationAKS00BZ8
SKIA7126E

LAN-22
[CAN]
CAN SYSTEM (TYPE 1)
Revision: 2004 November 2004 FX35/FX45
Wiring Diagram - CAN -AKS00BZ9
TKWM1292E

CAN SYSTEM (TYPE 1)
LAN-23
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
TKWH0247E

LAN-24
[CAN]
CAN SYSTEM (TYPE 1)
Revision: 2004 November 2004 FX35/FX45
Work FlowAKS00BZA
1. When there are no indications of “BCM”, “METER A/C AMP” or “IPDM E/R” on “SELECT SYSTEM” dis-
play of CONSULT-II, print the “SELECT SYSTEM”.
2. Print all the data of “SELF-DIAG RESULTS” for “ENGINE”, “A/T”, “BCM”, “METER A/C AMP”, “ABS”, and
“IPDM E/R” displayed on CONSULT-II.
3. Print all the data of “CAN DIAG SUPPORT MNTR” for “ENGINE”, “A/T”, “BCM”, “METER A/C AMP”,
“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-26, "
CHECK SHEET" .
5. Based on the indications of “SELECT SYSTEM” and the results of “CAN DIAG SUPPORT MNTR”, put
marks “v” onto the items with “No indication”, “NG”, or “UNKWN” in the check sheet table. Refer to LAN-
26, "CHECK SHEET" .
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 “CAN DIAG SUPPORT MNTR” items which are not indi-
cated in check sheet table.
6. Check CAN communication line of the integrated display system. Refer to AV- 8 5 , "
CAN Communication
Line Inspection" .
7. Attach the CAN DIAG MONITOR check sheet onto the check sheet. Refer to LAN-26, "
CHECK SHEET" .
8. Mark the “NG” or “UNKWN” item of the check sheet table with “v” from the result of CAN DIAG MONITOR
check sheet. Refer to LAN-26, "
CHECK SHEET" .
PKIA2093E
PKIA8260E
PKIA8343E

CAN SYSTEM (TYPE 1)
LAN-25
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
NOTE:
If “NG” is displayed on “CAN COMM” as “CAN DIAG MNTR” for the diagnosed control unit, replace the
control unit. Refer to AV- 8 5 , "
CAN Communication Line Inspection" .
9. According to the check sheet results (example), start inspection. Refer to LAN-28, "
CHECK SHEET
RESULTS (EXAMPLE)" .

LAN-26
[CAN]
CAN SYSTEM (TYPE 1)
Revision: 2004 November 2004 FX35/FX45
CHECK SHEET
NOTE:
If “NG” is displayed on “INITIAL DIAG (Initial diagnosis)” or “CAN COMM” for the diagnosed control unit,
replace the control unit.
PKIA7926E

CAN SYSTEM (TYPE 1)
LAN-27
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
PKIA7927E

LAN-28
[CAN]
CAN SYSTEM (TYPE 1)
Revision: 2004 November 2004 FX35/FX45
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 data link connector. Refer to LAN-41, "Circuit Check Between TCM and
Data Link Connector" .
PKIA7928E
SKIA6558E

CAN SYSTEM (TYPE 1)
LAN-29
[CAN]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: 2004 November 2004 FX35/FX45
Case 2
Check harness between data link connector and unified meter and A/C amp. Refer to LAN-41, "Circuit Check
Between Data Link Connector and Unified Meter and A/C Amp." .
PKIA7929E
SKIA6559E