Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Altima 2000-2005 Approved Nissan Altima 2003 LAN
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K ELECTRICAL
A
B
SECTION
LAN SYSTEM C
D
E
CONTENTS
CAN CAN SYSTEM (FOR A/T MODELS) ........................ 28 . F
System Description ................................................ 28 .
PRECAUTIONS ......................................................... 2 . Component Parts and Harness Connector Location 28 ...
Precautions for Supplemental Restraint System Wiring Diagram -- CAN -- .................................... 29 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Work Flow .............................................................. 31
.
SIONER" ................................................................. 2
. CHECK SHEET .................................................. 32 .
Precautions For Trouble Diagnosis ......................... 2 . CHECK SHEET RESULTS (EXAMPLE) ............ 33 .
CAN SYSTEM ...................................................... 2 . H
Circuit Check Between TCM and Combination
Precautions For Harness Repair ............................. 2 . Meter ..................................................................... 36
.
CAN SYSTEM ...................................................... 2 . Circuit Check Between Combination Meter and
CAN COMMUNICATION ........................................... 3 . BCM ....................................................................... 38
. I
System Description ................................................. 3 . ECM Circuit Check ................................................ 38 .
FOR TCS MODELS ............................................. 3 . TCM Circuit Check ................................................ 39 .
FOR A/T MODELS ............................................... 4 . Combination Meter Circuit Check .......................... 39 . J
FOR M/T MODELS .............................................. 5 . BCM Circuit Check ................................................ 40 .
CAN SYSTEM (FOR TCS MODELS) ........................ 7 . IPDM E/R Circuit Check ........................................ 40 .
System Description ................................................. 7 . CAN Communication Circuit Check ....................... 41 .
Component Parts and Harness Connector Location 7 ..... LAN
IPDM E/R Ignition Relay Circuit Check ................. 44 .
Wiring Diagram -- CAN -- ...................................... 8 . IPDM E/R Check ................................................... 44 .
Work Flow ............................................................. 10
. Component Inspection ........................................... 44 .
CHECK SHEET ...................................................11 . ECM/IPDM E/R INTERNAL CIRCUIT INSPEC- L
CHECK SHEET RESULTS (EXAMPLE) ............ 12 . TION ................................................................... 44
.
Circuit Check Between TCM and Combination CAN SYSTEM (FOR M/T MODELS) ....................... 45 .
Meter ..................................................................... 17
. System Description ................................................ 45 . M
Circuit Check Between Combination Meter and Component Parts and Harness Connector Location 45 ...
BCM ...................................................................... 18
. Wiring Diagram -- CAN -- .................................... 46 .
Circuit Check Between BCM and ABS Actuator and Work Flow .............................................................. 48
.
Electric Unit (Control Unit) ..................................... 19 . CHECK SHEET .................................................. 49 .
ECM Circuit Check ................................................ 21 . CHECK SHEET RESULTS (EXAMPLE) ............ 50 .
TCM Circuit Check ................................................ 21 . Circuit Check Between Combination Meter and
Combination Meter Circuit Check ......................... 22 . BCM ....................................................................... 52
.
BCM Circuit Check ................................................ 22 . ECM Circuit Check ................................................ 53 .
ABS Actuator and Electric Unit (Control Unit) Circuit Combination Meter Circuit Check .......................... 54 .
Check .................................................................... 23
. BCM Circuit Check ................................................ 54 .
IPDM E/R Circuit Check ........................................ 23 . IPDM E/R Circuit Check ........................................ 55 .
CAN Communication Circuit Check ...................... 24 . CAN Communication Circuit Check ....................... 56 .
IPDM E/R Ignition Relay Circuit Check ................. 27 . Component Inspection ........................................... 59 .
Component Inspection .......................................... 27 . ECM/IPDM E/R INTERNAL CIRCUIT INSPEC-
ECM/IPDM E/R INTERNAL CIRCUIT INSPEC- TION ................................................................... 59
.
TION ................................................................... 27
.
Revision: May 2004 LAN-1 2003 Altima
PRECAUTIONS
[CAN]
PRECAUTIONS PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS00651
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 Trouble Diagnosis EKS003HN
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 EKS003HO
CAN SYSTEM
q Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
PKIA0306E
q 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.)
PKIA0307E
Revision: May 2004 LAN-2 2003 Altima
CAN COMMUNICATION
[CAN]
CAN COMMUNICATION PFP:23710
A
System Description EKS003HP
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- B
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. C
FOR TCS MODELS
System diagram D
E
F
G
LKIA0015E
Input/output signal chart
T: Transmit R: Receive H
COMBINA-
ABS/TCS
Signals ECM TCM TION BCM IPDM E/R
control unit
METER
I
Engine speed signal T R R
Engine coolant temperature signal T R
Accelerator pedal position signal T J
Fuel consumption monitor signal T R
A/T warning lamp signal T R
LAN
A/T position indicator signal R T R R(R range only) R
ABS operation signal R T
TCS operation signal R R T L
Air conditioner switch signal R T
Air conditioner compressor signal R T
M
A/C compressor request signal T R
Cooling fan motor operation signal R T
Cooling fan speed request signal T R
Position lights request R T R
Position lights status R T
Low beam request T R
Low beam status R R T
High beam request R T R
High beam status R R T
Front fog lights request T R
Front fog light status R T
OD cancel switch signal R T R
Brake switch signal R T
Revision: May 2004 LAN-3 2003 Altima
CAN COMMUNICATION
[CAN]
COMBINA-
ABS/TCS
Signals ECM TCM TION BCM IPDM E/R
control unit
METER
R T
Vehicle speed signal
R T R
Oil pressure switch R T
Sleep request1 R T
Sleep request2 T R
N range switch signal R T
P range switch signal R T
Seat belt buckle switch signal T R
Door switch signal R T R
Tail lamp request R T R
Turn indicator signal R T
Buzzer output signal R T
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R
Wiper operation R T
Wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control sig-
R R T
nal
FOR A/T MODELS
System diagram
LKIA0017E
Input/output signal chart
T: Transmit R: Receive
COMBINATION
Signals ECM TCM BCM IPDM E/R
METER
Engine speed signal T R
Engine coolant temperature signal T R
Accelerator pedal position signal T R
Fuel consumption monitor signal T R
A/T warning lamp signal T R
A/T position indicator signal R T R R(R range only)
Air conditioner switch signal R T
Air conditioner compressor signal R T
A/C compressor request signal T R
Revision: May 2004 LAN-4 2003 Altima
CAN COMMUNICATION
[CAN]
COMBINATION
Signals ECM TCM BCM IPDM E/R
METER A
Blower fan switch signal (QR25DE) T
R
Cooling fan motor operation signal R T
B
Cooling fan speed request signal T R
Position lights request R T R
Position lights status R T C
Low beam request T R
Low beam status R R T
D
High beam request R T R
High beam status R R T
Front fog lights request T R E
Front fog light status R T
OD cancel switch signal R T R
F
Brake switch signal R T
R T
Vehicle speed signal
R T R G
Oil pressure switch R T
Sleep request1 R T
Sleep request2 T R H
N range switch signal R T
P range switch signal R T
I
Seat belt buckle switch signal T R
Door switch signal R T R
Tail lamp request R T R J
Turn indicator signal R T
Buzzer output signal R T
LAN
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R L
Wiper operation R T
Wiper stop position signal R T
M
Rear window defogger switch signal T R
Rear window defogger control signal R R T
FOR M/T MODELS
System diagram
LKIA0018E
Revision: May 2004 LAN-5 2003 Altima
CAN COMMUNICATION
[CAN]
Input/output signal chart
T: Transmit R: Receive
COMBINATION
Signals ECM BCM IPDM E/R
METER
Engine speed signal T
Engine coolant temperature signal T
Fuel consumption monitor signal T
Air conditioner switch signal R T
Air conditioner compressor signal R T
A/C compressor request signal T R
Blower fan switch signal R(QR25DE) T
Cooling fan motor operation signal R T
Cooling fan speed request signal T R
Position lights request R T R
Position lights status R T
Low beam request T R
Low beam status R R T
High beam request R T R
High beam status R R T
Front fog lights request T R
Front fog light status R T
Vehicle speed signal R T
Oil pressure switch R T
Sleep request1 R T
Sleep request2 T R
Seat belt buckle switch signal T R
Door switch signal R T R
Tail lamp request R T R
Turn indicator signal R T
Buzzer output signal R T
Trunk switch signal R T
ASCD main switch signal T R
ASCD cruise signal T R
Wiper operation R T
Wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R T
Revision: May 2004 LAN-6 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
CAN SYSTEM (FOR TCS MODELS) PFP:23710
A
System Description EKS003HQ
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- B
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. C
Component Parts and Harness Connector Location EKS003HR
D
E
F
G
H
I
J
LAN
L
M
LKIA0049E
Revision: May 2004 LAN-7 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Wiring Diagram -- CAN -- EKS003HS
WKWA0298E
Revision: May 2004 LAN-8 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
A
B
C
D
E
F
G
H
I
J
LAN
L
M
WKWA0344E
Revision: May 2004 LAN-9 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Work Flow EKS003HT
1. Print all the data of "SELF-DIAG RESULTS" for "ENGINE", "A/T", "BCM", and "ABS" displayed on CON-
SULT-II.
PKIA8260E
2. Print all the data of "CAN DIAG SUPPORT MNTR" for "ENGINE", "A/T", "BCM", and "ABS" displayed on
CONSULT-II.
PKIA8343E
3. Attach the printed sheet of "SELF-DIAG RESULTS" and "CAN DIAG SUPPORT MNTR" onto the check
sheet. Refer to LAN-11, "CHECK SHEET" .
4. Based on the "CAN DIAG SUPPORT MNTR" results, put check marks onto the items with "UNKWN" or
"NG" in the check sheet table. Refer to LAN-11, "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.
5. According to the check sheet results (example), start inspection. Refer to LAN-12, "CHECK SHEET
RESULTS (EXAMPLE)" .
Revision: May 2004 LAN-10 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
CHECK SHEET
A
B
C
D
E
F
G
H
I
J
LAN
L
M
LKIA0525E
Revision: May 2004 LAN-11 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
CHECK SHEET RESULTS (EXAMPLE)
Case 1
Replace ECM.
LKIA0526E
WKIA2974E
Case 2
Replace TCM.
WKIA2975E
WKIA2976E
Revision: May 2004 LAN-12 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Case 3
Replace BCM. A
B
C
D
WKIA2977E
E
F
G
H
WKIA2978E
Case 4
Replace ABS actuator and electric unit (control unit). Refer to BRC-44, "Removal and Installation" . I
J
LAN
L
WKIA2979E
M
WKIA2980E
Revision: May 2004 LAN-13 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Case 5
Check harness between TCM and combination meter. Refer to LAN-17, "Circuit Check Between TCM and
Combination Meter" .
WKIA2983E
Case 6
Check harness between combination meter and BCM. Refer to LAN-18, "Circuit Check Between Combination
Meter and BCM" .
WKIA2984E
Case 7
Check harness between BCM and ABS actuator and electric unit (control unit). Refer to LAN-19, "Circuit
Check Between BCM and ABS Actuator and Electric Unit (Control Unit)" .
WKIA2985E
Case 8
Check ECM circuit. Refer to LAN-21, "ECM Circuit Check" .
WKIA2986E
Revision: May 2004 LAN-14 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Case 9
Check TCM circuit. Refer to LAN-21, "TCM Circuit Check" . A
B
C
D
WKIA2987E
Case 10 E
Check combination meter circuit. Refer to LAN-22, "Combination Meter Circuit Check" .
F
G
H
WKIA2988E
Case 11 I
Check BCM circuit. Refer to LAN-22, "BCM Circuit Check" .
J
LAN
L
WKIA2989E
M
Case 12
Check ABS actuator and electric unit (control unit) circuit. Refer to LAN-23, "ABS Actuator and Electric Unit
(Control Unit) Circuit Check" .
WKIA2990E
Revision: May 2004 LAN-15 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Case 13
Check IPDM E/R circuit. Refer to LAN-23, "IPDM E/R Circuit Check" .
WKIA2991E
Case 14
Check CAN communication circuit. Refer to LAN-24, "CAN Communication Circuit Check" .
WKIA2992E
Case 15
Check IPDM E/R ignition relay circuit. Refer to LAN-27, "IPDM E/R Ignition Relay Circuit Check" .
WKIA2993E
WKIA2994E
Revision: May 2004 LAN-16 2003 Altima
CAN SYSTEM (FOR TCS MODELS)
[CAN]
Circuit Check Between TCM and Combination Meter EKS003HU
1. CHECK CONNECTOR A
1. Turn ignition switch OFF.
2. Disconnect the negative battery terminal. B
3. Check following terminals and connector for damage, bent or loose connection (control module-side,
meter-side and harness-side).
q TCM. C
q Combination meter.
q Between TCM and combination meter.
D
OK or NG
OK >> GO TO 2.
NG >> Repair terminal or connector.
E
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect TCM connector and harness connector F59. F
2. Check continuity between TCM harness connector F56 termi-
nals 5 (L), 6 (Y) and harness connector F59 terminals 23 (L), 22
(Y). G
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