Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti G35 2003-2005 Coupe Sedan Approved Infiniti G35 Coupe 2003 lan
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LAN SYSTEM
K ELECTRICAL
A
SECTION LAN LAN SYSTEM
B
C
D
E
CONTENTS
CAN IPDM E/R Circuit Check ........................................ 26 . F
CAN Communication Circuit Check ....................... 27 .
PRECAUTIONS ......................................................... 2
. IPDM E/R Ignition Relay Circuit Check ................. 29 .
Precautions for Supplemental Restraint System Component Inspection ........................................... 29 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
SIONER" ................................................................. 2
. TION ................................................................... 29
.
Precautions for Battery Service ............................... 2 . CAN SYSTEM (TYPE 2) .......................................... 30 .
Precautions For Trouble Diagnosis ......................... 2 . H
System Description ................................................ 30 .
CAN SYSTEM ...................................................... 2. Component Parts and Harness Connector Location 30 ...
Precautions For Harness Repair ............................. 2 . Schematic .............................................................. 31
.
CAN SYSTEM ...................................................... 2. Wiring Diagram -- CAN -- .................................... 32 . I
CAN COMMUNICATION ........................................... 4 . Work Flow .............................................................. 35
.
System Description ................................................. 4
. CHECK SHEET .................................................. 36 .
CAN Communication Unit ....................................... 4 . CHECK SHEET RESULTS (EXAMPLE) ............ 37 . J
TYPE 1 ................................................................. 4
. Circuit Check Between TCM and Data Link Con-
TYPE 2 ................................................................. 6
. nector ..................................................................... 47
.
CAN SYSTEM (TYPE 1) ............................................ 8 . Circuit Check Between Data Link Connector and
System Description ................................................. 8
. LAN
VDC/TCS/ABS Control Unit ................................... 48 .
Component Parts and Harness Connector Location 8 ..... ECM Circuit Check ................................................ 48 .
Schematic ............................................................... 9
. TCM Circuit Check ................................................ 49 .
Wiring Diagram -- CAN -- .................................... 10 . Combination Meter Circuit Check .......................... 49 . L
Work Flow ............................................................. 13
. BCM Circuit Check ................................................ 50 .
CHECK SHEET .................................................. 14 . Steering Angle Sensor Circuit Check .................... 50 .
CHECK SHEET RESULTS (EXAMPLE) ............ 15 . VDC/TCS/ABS Control Unit Circuit Check ............ 51 . M
Circuit Check Between Data Link Connector and IPDM E/R Circuit Check ........................................ 51 .
VDC/TCS/ABS Control Unit .................................. 23 . CAN Communication Circuit Check ....................... 52 .
ECM Circuit Check ................................................ 24. IPDM E/R Ignition Relay Circuit Check ................. 54 .
Combination Meter Circuit Check ......................... 24 . Component Inspection ........................................... 54 .
BCM Circuit Check ................................................ 25. ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
Steering Angle Sensor Circuit Check .................... 25 . TION ................................................................... 54
.
VDC/TCS/ABS Control Unit Circuit Check ............ 26 .
Revision; 2004 April LAN-1 2003 G35 Coupe
PRECAUTIONS
[CAN]
PRECAUTIONS
[CAN] PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AKS003EX
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
q To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Battery Service AKS005IS
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions For Trouble Diagnosis AKS003EY
CAN SYSTEM
q Do not apply voltage of 7.0V or higher to the measurement terminals.
q Use the tester with its open terminal voltage being 7.0V or less.
q Be sure to turn ignition switch off and disconnect negative battery terminal before checking the circuit.
Precautions For Harness Repair AKS003EZ
CAN SYSTEM
q Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
PKIA0306E
Revision; 2004 April LAN-2 2003 G35 Coupe
PRECAUTIONS
[CAN]
q Do not perform bypass wire connections for the repair parts.
(The spliced wire will become separated and the characteristics A
of twisted line will be lost.)
B
C
PKIA0307E
D
E
F
G
H
I
J
LAN
L
M
Revision; 2004 April LAN-3 2003 G35 Coupe
CAN COMMUNICATION
[CAN]
CAN COMMUNICATION PFP:23710
System Description AKS003F0
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.
CAN Communication Unit AKS003F1
Go to CAN system, when selecting your CAN system type from the following table.
Body type Coupe
Axle 2WD
Engine VQ35DE
Transmission M/T A/T
Brake control VDC
CAN system type 1 2
CAN system trouble diagnosis LAN-8 LAN-30
TYPE 1
System diagram
SKIA6556E
Input/output signal chart
T: Transmit R: Receive
Steering VDC/TCS/
Combina-
Signals ECM BCM angle ABS IPDM E/R
tion meter
sensor control unit
Engine speed signal T R R
Engine coolant temperature signal T R
Accelerator pedal position signal T R
Fuel consumption monitor signal T R
Air conditioner switch signal R T
A/C compressor request signal T R
A/C compressor feedback signal T R
Blower fan motor switch signal R T
Cooling fan motor operation signal T R
Revision; 2004 April LAN-4 2003 G35 Coupe
CAN COMMUNICATION
[CAN]
Steering VDC/TCS/
Combina-
Signals ECM BCM angle ABS IPDM E/R A
tion meter
sensor control unit
Position lights request signal R T R
Low beam request signal T R B
Low beam status signal R R T
High beam request signal R T R
C
High beam status signal R R T
Front fog lights request signal T R
R T D
Vehicle speed signal
R T R
Sleep request 1 signal R T
E
Sleep request 2 signal T R
Wake up request 1 signal R T
Wake up request 2 signal R T F
Door switch signal (without navigation system) R T R
Door switch signal (with navigation system) T R
Turn indicator signal R T
G
Seat belt buckle switch signal T R
Oil pressure switch signal R T H
Buzzer output signal R T
Trunk switch signal R T
Malfunction indicator lamp signal T R I
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
J
Fuel level sensor signal R T
Front wiper request signal T R
Front wiper stop position signal R T LAN
Rear window defogger switch signal T R
Rear window defogger control signal R R T
L
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R M
Steering angle sensor signal T R
Revision; 2004 April LAN-5 2003 G35 Coupe
CAN COMMUNICATION
[CAN]
TYPE 2
System diagram
SKIA6557E
Input/output signal chart
T: Transmit R: Receive
Steering VDC/TCS/
Combina-
Signals ECM TCM BCM angle ABS IPDM E/R
tion meter
sensor control unit
Engine speed signal T R R R
Engine coolant temperature signal T R R
Accelerator pedal position signal T R R
Closed throttle position signal T R
Wide open throttle position signal T R
Battery voltage signal T R
Stop lamp switch R T
Fuel consumption monitor signal T R
A/T self-diagnosis signal R T
A/T CHECK indicator lamp signal T R
A/T position indicator signal T R R
ABS operation signal R T
A/T shift schedule change demand
R T
signal
Air conditioner switch signal R T
A/C compressor request signal T R
A/C compressor feedback signal T R
Blower fan motor switch signal R T
Cooling fan motor operation signal T R
Position lights request signal R T R
Low beam request signal T R
Low beam status signal R R T
High beam request signal R T R
High beam status signal R R T
Front fog lights request signal T R
Revision; 2004 April LAN-6 2003 G35 Coupe
CAN COMMUNICATION
[CAN]
Steering VDC/TCS/
Combina-
Signals ECM TCM BCM angle ABS IPDM E/R A
tion meter
sensor control unit
R T
Vehicle speed signal
R R T R B
Sleep request 1 signal R T
Sleep request 2 signal T R
C
Wake up request 1 signal R T
Wake up request 2 signal R T
Door switch signal D
R T R
(without navigation system)
Door switch signal
T R
(with navigation system) E
Turn indicator signal R T
Seat belt buckle switch signal T R
Oil pressure switch signal R T F
Buzzer output signal R T
Trunk switch signal R T
G
Malfunction indicator lamp signal T R
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R H
Fuel level sensor signal R T
Output shaft revolution signal R T
I
Turbine revolution signal R T
Front wiper request signal T R
Front wiper stop position signal R T J
Rear window defogger switch signal T R
Rear window defogger control sig-
R R T LAN
nal
Manual mode signal R T
Not manual mode signal R T
L
Manual mode shift up signal R T
Manual mode shift down signal R T
Manual mode indicator signal T R M
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
Revision; 2004 April LAN-7 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
CAN SYSTEM (TYPE 1) PFP:23710
System Description AKS005NY
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 Location AKS005NZ
SKIA4632E
Revision; 2004 April LAN-8 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Schematic AKS005O0
A
B
C
D
E
F
G
H
I
J
LAN
L
M
TKWT0572E
Revision; 2004 April LAN-9 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Wiring Diagram -- CAN -- AKS005O1
TKWT0573E
Revision; 2004 April LAN-10 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
A
B
C
D
E
F
G
H
I
J
LAN
L
M
TKWT0574E
Revision; 2004 April LAN-11 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
TKWT0575E
Revision; 2004 April LAN-12 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Work Flow AKS00C53
A
1. Print all the data of "SELF-DIAG RESULTS" for "ENGINE", "BCM" and "ABS" displayed on CONSULT-II.
B
C
D
PKIA8260E
2. Print all the data of "CAN DIAG SUPPORT MNTR" for "ENGINE", "BCM" and "ABS" displayed on CON-
E
SULT-II.
F
G
H
PKIA8343E
3. Attach the printed sheet of "SELECT SYSTEM", "SELF-DIAG RESULTS" and "CAN DIAG SUPPORT
I
MNTR" onto the check sheet. Refer to LAN-14, "CHECK SHEET" .
4. Based on the "CAN DIAG SUPPORT MNTR" results, put marks "v" onto the items with "NG" or "UNKWN"
in the check sheet table. Refer to LAN-14, "CHECK SHEET" .
J
NOTE:
q If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diag-
nosed control unit, replace the control unit.
LAN
q 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. L
5. According to the check sheet results (example), start inspection. Refer to LAN-15, "CHECK SHEET
RESULTS (EXAMPLE)" .
M
Revision; 2004 April LAN-13 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
CHECK SHEET
NOTE:
If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diagnosed
control unit, replace the control unit.
PKIB0384E
Revision; 2004 April LAN-14 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
CHECK SHEET RESULTS (EXAMPLE)
NOTE: A
If "NG" is displayed on "INITIAL DIAG (Initial diagnosis)" as "CAN DIAG SUPPORT MNTR" for the diagnosed
control unit, replace the control unit.
Case1 B
Check harness between data link connector and VDC/TCS/ABS control unit. Refer to LAN-23, "Circuit Check
Between Data Link Connector and VDC/TCS/ABS Control Unit" .
C
D
E
PKIB0385E
F
G
H
I
J
LAN
SKIA7102E
L
M
Revision; 2004 April LAN-15 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case2
Check ECM circuit. Refer to LAN-24, "ECM Circuit Check" .
PKIB0386E
SKIA7103E
Revision; 2004 April LAN-16 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case3
Check combination meter circuit. Refer to LAN-24, "Combination Meter Circuit Check" . A
B
C
D
PKIB0387E
E
F
G
H
I
SKIA7104E J
LAN
L
M
Revision; 2004 April LAN-17 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case4
Check BCM circuit. Refer to LAN-25, "BCM Circuit Check" .
PKIB0388E
SKIA7105E
Revision; 2004 April LAN-18 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case5
Check steering angle sensor circuit. Refer to LAN-25, "Steering Angle Sensor Circuit Check" . A
B
C
D
PKIB0389E
E
F
G
H
I
SKIA7106E J
LAN
L
M
Revision; 2004 April LAN-19 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case6
Check VDC/TCS/ABS control unit circuit. Refer to LAN-26, "VDC/TCS/ABS Control Unit Circuit Check" .
PKIB0390E
SKIA7107E
Revision; 2004 April LAN-20 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case7
Check IPDM E/R circuit. Refer to LAN-26, "IPDM E/R Circuit Check" . A
B
C
D
PKIB0391E
E
F
G
H
I
SKIA7108E J
LAN
L
M
Revision; 2004 April LAN-21 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Case8
Check CAN communication circuit. Refer to LAN-27, "CAN Communication Circuit Check" .
PKIB0392E
Case9
Check IPDM E/R ignition relay circuit continuously sticks "OFF". Refer to LAN-29, "IPDM E/R Ignition Relay
Circuit Check" .
PKIB0393E
Case10
Check IPDM E/R ignition relay circuit continuously sticks "ON". Refer to LAN-29, "IPDM E/R Ignition Relay Cir-
cuit Check" .
PKIB0394E
Revision; 2004 April LAN-22 2003 G35 Coupe
CAN SYSTEM (TYPE 1)
[CAN]
Circuit Check Between Data Link Connector and VDC/TCS/ABS Control Unit
AKS005O4 A
1. CHECK CONNECTOR
1. Turn ignition switch OFF. B
2. Disconnect the negative battery terminal.
3. Check following terminals and connector for damage, bend and loose connection (meter-side, control
module-side, sensor-side, control unit-side and harness-side). C
q Combination meter.
q BCM.
q Steering angle sensor. D
q VDC/TCS/ABS control unit.
q Between data link connector and VDC/TCS/ABS control unit.
OK or NG E
OK >> GO TO 2.
NG >> Repair terminal or connector.
F
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect harness connector M15. G
2. Check continuity between data link connector M8 terminals 6
(L), 3 (R) and harness connector M15 terminals 58G (L), 59G
(R).
H
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