Its control NISSAN TEANA 2014 Service Manual

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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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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*: 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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LAN-32
< SYSTEM DESCRIPTION >[CAN]
SYSTEM
CAN COMMUNICATION SYSTEM : CA N Communication Signal Chart
INFOID:0000000009461413
Refer to LAN-17, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
NOTE:
Refer to LAN-23, "Abbreviation List"
for the abbreviations of the connecting units.
T: Transmit R: Receive
Warning systems switch 7 inch color display NAVI switches
Automatic temperature control dial
With driver assistance system With Navigation system With auto A/C
AWMIA1453ZZ
Signal nameECM
EPS
IPDM-E TCM
M&A
STRG AV
AV M
HVAC ABS
BCM
A/C compressor request signal T R R
Accelerator pedal position signal T R R R
ASCD operation signal T R
ASCD status signal T R
Closed throttle position signal T R
Cooling fan speed request signal T R R
Engine coolant temperature signal T R R R R R
Engine and CVT integrated control
signal TR
RT
Engine speed signal T RR RRRR
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MALFUNCTION AREA CHARTLAN-43
< DTC/CIRCUIT DIAGNOSIS > [CAN]
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DTC/CIRCUIT DIAGNOSIS
MALFUNCTION AREA CHART
Main LineINFOID:0000000009461416
Branch LineINFOID:0000000009461417
Short CircuitINFOID:0000000009461418
Malfunction area Reference
Main line between IPDM E/R and data link connector LAN-44, "Diagnosis Procedure"
Main line between data link connector and combination meterLAN-45, "Diagnosis Procedure"
Main line between combination meter and air bag diagnosis sensor unit (with
auto A/C) LAN-46, "Diagnosis Procedure"
Main line between combination meter and air bag diagnosis sensor unit (with
manual A/C) LAN-47, "Diagnosis Procedure"
Main line between air bag diagnosis sensor unit and A/C auto amp.
LAN-48, "Diagnosis Procedure"
Malfunction area Reference
ECM branch line circuit LAN-49, "Diagnosis Procedure"
ABS actuator and electric unit (control unit) branch line circuit LAN-50, "Diagnosis Procedure"
Power steering control module branch line circuit LAN-51, "Diagnosis Procedure"
IPDM E/R branch line circuit LAN-52, "Diagnosis Procedure"
TCM branch line circuitLAN-53, "Diagnosis Procedure"
Data link connector branch line circuit LAN-54, "Diagnosis Procedure"
Combination meter branch line circuit LAN-55, "Diagnosis Procedure"
Steering angle sensor branch line circuit LAN-56, "Diagnosis Procedure"
Air bag diagnosis sensor unit branch line circuitLAN-57, "Diagnosis Procedure"
AV control unit branch line circuit LAN-58, "Diagnosis Procedure"
ITS control unit branch line circuit LAN-59, "Diagnosis Procedure"
A/C auto amp. branch line circuit LAN-60, "Diagnosis Procedure"
BCM branch line circuit LAN-61, "Diagnosis Procedure"
Malfunction area Reference
CAN communication circuit LAN-62, "Diagnosis Procedure"
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AVM BRANCH LINE CIRCUITLAN-59
< DTC/CIRCUIT DIAGNOSIS > [CAN]
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AVM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000009461434
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Check the terminals and connectors of the ITS c ontrol unit for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ITS control unit.
2. Check the resistance between the ITS control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the ITS control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circui t of the ITS control unit. Refer to DAS-62, "Diagnosis Proce-
dure".
Is the inspection result normal?
YES (Present error)>>Replace the ITS control unit. Refer to DAS-68, "Removal and Installation".
YES (Past error)>>Error was detected in the ITS control unit branch line.
NO >> Repair the power supply and the ground circuit.
ITS control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M58 27 7 Approx. 54 – 66
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LAN-128
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
AVM BRANCH LINE CIRCUIT
AVM BRANCH LINE CIRCUIT
Diagnosis ProcedureINFOID:0000000009461499
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ITS control unit for damage, bend and loose connection (unit
side and connector side).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ITS control unit.
2. Check the resistance between the ITS control unit harness connector terminals.
Is the measurement value within the specification?
YES >> GO TO 3.
NO >> Repair the ITS control unit branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circui t of the ITS control unit. Refer to DAS-62, "Diagnosis Proce-
dure".
Is the inspection result normal?
YES (Present error)>>Replace the ITS control unit. Refer to DAS-68, "Removal and Installation".
YES (Past error)>>Error was detected in the ITS control unit branch line.
NO >> Repair the power supply and the ground circuit.
ITS control unit harness connector Resistance (Ω)
Connector No. Terminal No.
M58 27 7 Approx. 54 – 66
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