NISSAN TEANA 2014 Service Manual

LAN-22
< BASIC INSPECTION >[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
Interview Sheet (Example)
DETECT THE ROOT CAUSE
CAN diagnosis function of CONSULT detects the root cause.
JSMIA0531GB
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HOW TO USE THIS SECTIONLAN-23
< HOW TO USE THIS MANUAL > [CAN]
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HOW TO USE THIS MANUAL
HOW TO USE THIS SECTION
InformationINFOID:0000000009461404
• “CAN” of LAN Section describes information
peculiar to a vehicle and inspection procedures.
• For trouble diagnosis procedure, refer to LAN-18, "Trouble Diagnosis Flow Chart"
of “CAN FUNDAMEN-
TA L ” .
Abbreviation ListINFOID:0000000009461405
Unit name abbreviations in CONSULT CAN diagnosis and in this section are as per the following list.
Abbreviation Unit name
A-BAG Air bag diagnosis sensor unitABS ABS actuator and electric unit (control unit)
AV AV control unit
AV M I T S c o n t r o l u n i t
BCM BCM DLC Data link connector
ECM ECM EPS Power steering control module
HVAC A/C auto amp.
IPDM-E IPDM E/R M&A Combination meter
STRG Steering angle sensor TCM TCM
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LAN-24
< PRECAUTION >[CAN]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009980936
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 performed by
an authorized NISS AN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery and wait at least three minutes before performing any service.
Precautions for Trouble DiagnosisINFOID:0000000009461407
CAUTION:
Follow the instructions listed below. Fail ure to do this may cause damage to parts:
• Never apply 7.0 V or more to the measurement terminal.
• Use a tester with open terminal voltage of 7.0 V or less.
• Turn the ignition switch OFF and disconnect th e battery cable from the negative terminal when
checking the harness.
Precautions for Harness RepairINFOID:0000000009461408
• Solder the repaired area and wrap tape around the soldered area. NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
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PRECAUTIONSLAN-25
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• Bypass connection is never allowed at the repaired area.
NOTE:
Bypass connection may cause CAN communication error. The
spliced wire becomes separated and t he characteristics of twisted
line are lost.
• Replace the applicable harness as an assembly if error is detected on the shield lines of CAN communica-
tion line.
SKIB8767E
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LAN-26
< SYSTEM DESCRIPTION >[CAN]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000009461409
Air bag diagnosis sensor unit AV control unit ITS control unit
ABS actuator and elec tric unit (con-
trol unit) Power steering control module TCM
ECM IPDM E/R A/C auto amp.
Data link connector BCM Combination meter
Steering angle sensor
AWMIA1288ZZ
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LAN
SYSTEMLAN-27
< SYSTEM DESCRIPTION > [CAN]
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SYSTEM
CAN COMMUNICATION SYSTEM
CAN COMMUNICATION SYSTEM : System DescriptionINFOID:0000000009461410
SYSTEM DIAGRAM
DESCRIPTION
CAN (Controller Area Network) is a serial communication li
ne 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 SIGNAL GENERATION
• Termination circuits (resistors) are connected ac ross the CAN communication system. When transmitting a
CAN communication signal, each control unit passes a cu rrent to the CAN-H line and the current returns to
the CAN-L line.
JSMIA1109GB
JSMIA0450GB
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LAN-28
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
• The current flows separately into the termination circuits connected
across the CAN communication system and the termination cir-
cuits drop voltage to generate a potential difference between the
CAN-H line and the CAN-L line.
NOTE:
A signal with no current passage is called “Recessive” and one
with current passage is called “Dominant”.
• The system produces digital signals for signal communications, by using the potential difference.
THE CONSTRUCTION OF CAN COMM UNICATION SIGNAL (MESSAGE)
CAN Communication Line
JSMIA0543GB
JSMIA0544ZZ
JSMIA0545ZZ
No. Message name Description
1 Start of frame (1 bit) Start of message.
2 Arbitration of field (11 bit) Priorities of message-sending are shown when there is a pos-
sibility that multiple messages are sent at the same time.
3 Control field (6 bit) Signal quantity in data field is shown.
4 Data field (0-64 bit) Actual signal is shown.
5 CRC field (16 bit) • The transmitting control unit calculates sending data in ad-
vance and writes the calculated value in a message.
• The receiving control unit calculates received data and judg-
es that the data reception is normal when the calculated val-
ue is the same as the value written in the sent data.
6 ACK field (2 bit) The completion of normal reception is sent to the transmitting
unit.
7 End of frame (7 bit) End of message.
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The CAN communication line is a twisted pair wire consisting of
strands of CAN-H and CAN-L and has noise immunity.
NOTE:
The CAN communication system has the characteristics of noise-resistant because this system produces dig-
ital signals by using the potential difference between the CAN-H line and the CAN-L line and has the twisted
pair wire structure.
Since the CAN-H line and the CAN-L line are always adjacent to
each other, the same degree of noise occurs, respectively, when a
noise occurs. Although the noise changes the voltage, the poten-
tial difference between the CAN-H line and the CAN-L line is
insensitive to noise. Therefore, noise-resistant signals can be
obtained.
CAN Signal Communications
Each control unit of the CAN communication system transmits signals through the CAN communication con-
trol circuit included in the control unit and receives only necessary signals from each control unit to perform
various kinds of control.
• Example: Transmitted signals
JSMIA0382ZZ
JSMIA0383ZZ
JSMIA0576GB
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LAN-30
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
• Example: Received signals
NOTE:
The above signal names and signal communications are provided for reference purposes. For CAN communi-
cations signals of this vehicle, refer to LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communication
Signal Chart".
CAN COMMUNICATION SYSTEM : CAN Communication Control CircuitINFOID:0000000009461411
CAN communication control circuit is incorporated into the control unit and transmits/receives CAN communi-
cation signals.
JSMIA0577GB
JSMIA0453GB
Component System description
CAN controller It controls CAN communication signal transmission and reception, error detection, etc.
Transceiver IC It converts digital signal into CAN communication signal, and CAN communication signal into digital
signal.
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SYSTEMLAN-31
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*: These are the only control units wired with both ends of CAN communication system.
CAN COMMUNICATION SYSTEM : CAN
System Specification ChartINFOID:0000000009461412
Determine CAN system type from the following specification chart.
NOTE:
Refer to LAN-18, "Trouble Diagnosis Procedure"
for how to use CAN system specification chart.
×: Applicable
VEHICLE EQUIPMENT IDENTIFICATION INFORMATION
NOTE:
Check CAN system type from the vehicle shape and equipment.
Noise filter It eliminates noise of CAN communication signal.
Termination circuit
*
(Resistance of approx. 120 Ω) Generates a potential difference between CAN-H and CAN-L.
Component System description
Body type
Sedan
Axle 2WD
Engine QR25DE VQ35DE
Transmission CVT
Brake control VDC
Driver assistance system ××
Navigation system ×× ××
Automatic air conditioner ××× ×××
CAN system type 12345678 CAN communication unit
ECM ××××××××
ABS actuator and electric unit (control unit) ××××××××
Power steering control module ××××××××
IPDM E/R ××××××××
TCM ××××××××
Data link connector ××××××××
Combination meter ××××××××
Steering angle sensor ××××××××
AV control unit ×× ××
ITS control unit ××
A/C auto amp. ××× ×××
BCM ××××××××
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