2007 NISSAN LATIO Lan system

LAN-1
LAN SYSTEM
K ELECTRICAL
CONTENTS
C
D
E
F
G
H
I
J
L
M
SECTION LAN
A
B
LAN
Revision: June 20062007 Versa
CAN FUNDAMENTAL
PRECAUTIONS .......................................................... 3
Precautions When Using CONSULT-II ..................... 3
Precautions for Trouble Diagnosis ........................... 3
Precautions for Harness Repair ............................... 3
SYSTEM DESCRIPTION ............................................ 4
CAN Communication System ................................... 4
SYSTEM DIAGRAM .............................................. 4
CAN COMMUNICATION CONTROL CIRCUIT ..... 5
Diag on CAN ............................................................ 6
DESCRIPTION ...................................................... 6
SYSTEM DIAGRAM .............................................. 6
TROUBLE DIAGNOSIS .............................................. 7
Condition of Error Detection ..................................... 7
CAN COMMUNICATION SYSTEM ERROR ......... 7
WHEN INDICATED “U1000” OR “U1001” IS INDI-
CATED EVEN THOUGH CAN COMMUNICA-
TION SYSTEM IS NORMAL ................................. 7
Symptom When Error Occurs in CAN Communi-
cation System ........................................................... 8
ERROR EXAMPLE ............................................... 8
Self-Diagnosis ........................................................ 12
CAN Diagnostic Support Monitor ........................... 13
MONITOR ITEM (CONSULT-II) .......................... 13
MONITOR ITEM (ON-BOARD DIAGNOSIS) ...... 14
TROUBLE DIAGNOSES WORK FLOW .................. 15
Information Needed for Trouble Diagnosis ............. 15
How to Use CAN Communication Signal Chart ..... 15
Trouble Diagnosis Flow Chart ................................ 16
Trouble Diagnosis Procedure ................................. 17
INTERVIEW WITH CUSTOMER ......................... 17
INSPECTION OF VEHICLE CONDITION ........... 18
CHECK OF CAN SYSTEM TYPE (HOW TO USE
CAN SYSTEM TYPE SPECIFICATION CHART) ... 19
CREATE INTERVIEW SHEET ............................ 21
CREATE DATA SHEET ....................................... 22
CREATE DIAGNOSIS SHEET ............................ 24
DETECT THE ROOT CAUSE ............................. 25
CAN
INDEX FOR DTC ....................................................... 40
DTC No. Index ........................................................ 40
HOW TO USE THIS SECTION ................................. 41
Caution ................................................................... 41
Abbreviation List ..................................................... 41
PRECAUTIONS ........................................................ 42
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 42
Precautions When Using CONSULT-II ................... 42
Precautions for Trouble Diagnosis ......................... 42
Precautions for Harness Repair ............................. 42
TROUBLE DIAGNOSIS ............................................ 44
CAN Diagnostic Support Monitor ............................ 44
MONITOR ITEM LIST (CONSULT-II) .................. 44
CAN System Specification Chart ............................ 47
VEHICLE EQUIPMENT IDENTIFICATION
INFORMATION .................................................... 47
CAN Communication Signal Chart ......................... 48
TYPE 1/TYPE 2/TYPE 3/TYPE 4 ........................ 48
TYPE 5/TYPE 6 ................................................... 49
TYPE 7/TYPE 8/TYPE 9/TYPE 10 ...................... 50
Schematic ............................................................... 53
Wiring Diagram — CAN — ..................................... 54
Interview Sheet ....................................................... 56
Data Sheet .............................................................. 57
CONSULT-II DATA ATTACHMENT SHEET ........ 57
CAN System (Type 1) ............................................. 60
DIAGNOSIS SHEET ........................................... 60
CAN System (Type 2) ............................................. 61
DIAGNOSIS SHEET ........................................... 61
CAN System (Type 3) ............................................. 62
DIAGNOSIS SHEET ........................................... 62
CAN System (Type 4) ............................................. 63
DIAGNOSIS SHEET ........................................... 63
CAN System (Type 5) ............................................. 64
DIAGNOSIS SHEET ........................................... 64
CAN System (Type 6) ............................................. 65
DIAGNOSIS SHEET ........................................... 65

LAN-2Revision: June 20062007 Versa CAN System (Type 7) ............................................. 66
DIAGNOSIS SHEET ............................................ 66
CAN System (Type 8) ............................................. 67
DIAGNOSIS SHEET ............................................ 67
CAN System (Type 9) ............................................. 68
DIAGNOSIS SHEET ............................................ 68
CAN System (Type 10) ........................................... 69
DIAGNOSIS SHEET ............................................ 69
Component Parts Location ..................................... 70
Harness Layout ...................................................... 70
Malfunction Area Chart ........................................... 71
MAIN LINE ........................................................... 71
BRANCH LINE .................................................... 71
SHORT CIRCUIT ................................................ 71Main Line Between Data Link Connector and TCM ...72
Main Line Between Data Link Connector and ABS
Actuator and Electric Unit (Control Unit) .................73
ECM Branch Line Circuit .........................................74
BCM Branch Line Circuit .........................................74
Data Link Connector Branch Line Circuit ................75
EPS Control Unit Branch Line Circuit .....................76
Intelligent Key Unit Branch Line Circuit ...................76
Combination Meter Branch Line Circuit ..................77
ABS Actuator and Electric Unit (Control Unit) Branch
Line Circuit ..............................................................78
TCM Branch Line Circuit .........................................78
IPDM E/R Branch Line Circuit .................................79
CAN Communication Circuit ...................................80

LAN-4
[CAN FUNDAMENTAL]
SYSTEM DESCRIPTION
Revision: June 20062007 Versa
SYSTEM DESCRIPTIONPFP:00000
CAN Communication SystemUKS005Y2

CAN communication is a multiplex communication system. This enables the system to transmit and
receive large quantities of data at high speed by connecting control units with two communication lines
(CAN-H and CAN-L).

Control units on the CAN network transmit signals using the CAN communication control circuit. They
receive only necessary signals from other control units to operate various functions.

CAN communication lines adopt twisted-pair line style (two lines twisted) for noise immunity.
SYSTEM DIAGRAM
Each control unit passes an electric current to the termination circuits when transmitting CAN communication
signal. The termination circuits produce an electrical potential difference between CAN-H and CAN-L. CAN
communication system transmits and receives CAN communication signals by the potential difference.
SKIB8887E
Component Description
Main line CAN communication line between splices
Branch line CAN communication line between splice and a control unit
Splice A point connecting a branch line with a main line
Termination circuit Refer to LAN-5, "
CAN COMMUNICATION CONTROL CIRCUIT" .

SYSTEM DESCRIPTION
LAN-5
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: June 20062007 Versa
CAN COMMUNICATION CONTROL CIRCUIT
*: These are the only control units wired with both ends of CAN communication system.
SKIB8713E
Component System description
CAN controller It controls CAN communication signal transmission and reception, error detection, etc.
Transceiver ICIt converts digital signal into CAN communication signal, and CAN communication signal into digi-
tal signal.
Noise filter It eliminates noise of CAN communication signal.
Termination circuit
*
(Resistance of approx. 120 Ω)It produces potential difference.

LAN-6
[CAN FUNDAMENTAL]
SYSTEM DESCRIPTION
Revision: June 20062007 Versa
Diag on CANUKS005Y3
DESCRIPTION
“Diag on CAN” is a diagnosis using CAN communication instead of previous DDL1 and DDL2 communication
line, between control unit and diagnosis unit.
SYSTEM DIAGRAM
SKIB8714E
Name Harness Description
DDL1Tx
RxIt is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)
DDL2 K-LINE It is used for trouble diagnosis. (CAN-H and CAN-L are used for controlling)
Diag on CANCAN-H
CAN-LIt is used for trouble diagnosis and control.

TROUBLE DIAGNOSIS
LAN-7
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: June 20062007 Versa
TROUBLE DIAGNOSISPFP:00004
Condition of Error DetectionUKS005Y4
“U1000” or “U1001” is indicated on SELF-DIAG RESULTS on CONSULT-II if CAN communication signal is not
transmitted or received between units for 2 seconds or more.
CAN COMMUNICATION SYSTEM ERROR

CAN communication line open (CAN-H, CAN-L, or both)

CAN communication line short (ground, between CAN communication lines, other harnesses)

Error of CAN communication control circuit of the unit connected to CAN communication line
WHEN INDICATED “U1000” OR “U1001” IS INDICATED EVEN THOUGH CAN COMMUNICA-
TION SYSTEM IS NORMAL

CONSULT-II CONVERTER not connected: Error may be detected by the self-diagnosis when not using
CONSULT-II CONVERTER (Depending on the control unit which carries out CAN communication).

Removal/installation of parts: Error may be detected when removing and installing CAN communication
unit and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be
detected.)

Fuse blown out (removed): CAN communication of the unit may cease.

Voltage drop: Error may be detected if voltage drops due to discharged battery when turning the ignition
switch ON (Depending on the control unit which carries out CAN communication).

Error may be detected if the power supply circuit of the control unit, which carries out CAN communica-
tion, malfunctions (Depending on the control unit which carries out CAN communication).

Error may be detected if reprogramming is not completed normally.
NOTE:
CAN communication system is normal if “U1000” or “U1001” is indicated on SELF-DIAG RESULTS of CON-
SULT-II under the above conditions. Erase the memory of the self-diagnosis of each unit.

LAN-8
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
Revision: June 20062007 Versa
Symptom When Error Occurs in CAN Communication SystemUKS005Y5
In CAN communication system, multiple units mutually transmit and receive signals. Each unit cannot transmit
and receive signals if any error occurs on CAN communication line. Under this condition, multiple control units
related to the root cause malfunction or go into fail-safe mode.
ERROR EXAMPLE
NOTE:

Each vehicle differs in symptom of each unit under fail-safe mode and CAN communication line wiring.

Refer to LAN-41, "Abbreviation List" for the unit abbreviation.
Example: TCM branch line open circuit
SKIB8738E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM Reverse warning chime does not sound.
EPS control unit Normal operation.
Combination meter

Shift position indicator and OD OFF indicator turn OFF.

Warning lamps turn ON.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/R Normal operation.

TROUBLE DIAGNOSIS
LAN-9
[CAN FUNDAMENTAL]
C
D
E
F
G
H
I
J
L
MA
B
LAN
Revision: June 20062007 Versa
Example: Data link connector branch line open circuit
NOTE:

When data link connector branch line is open, transmission and reception of CAN communication signals
is not affected. Therefore, no symptoms occur. However, be sure to repair malfunctioning circuit.

When data link connector branch line is open, the screen-display of the CONSULT-II “SELECT SYSTEM”
screen may be the same as when the CAN communication line has short-circuit. However, symptoms dif-
fer depending on the case. See below chart for the differences.
SKIB8739E
Unit name Symptom
ECM
Normal operation. BCM
EPS control unit
Combination meter
ABS actuator and electric unit (control unit)
TCM
IPDM E/R
SELECT SYSTEM
(CONSULT-II)Difference of symptom
Data link connector branch line open cir-
cuit
All Diag on CAN units are not
indicated.Normal operation.
CAN-H, CAN-L harness short-circuitMost the units which are connected to the CAN com-
munication system enter fail-safe mode or are deac-
tivated.