Nissan Primera P12. Instruction — part 125
CAN COMMUNICATION
BRC-5
[ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
CAN COMMUNICATION
PFP:23710
System Description
EFS002VX
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
EFS003FA
×
:Applicable
Body type
Sedan/Wagon/Hatch back
Axle
2WD
Engine
YD22DDTi
F9Q
Transmission
M/T
Brake control
ESP
ABS
ESP
ABS
CAN communication unit
ECM
×
×
×
×
×
×
×
×
ESP/TCS/ABS control unit
×
×
×
×
ABS actuator and electric
unit (control unit)
×
×
×
×
Data link connector
×
×
×
×
×
×
×
×
Tyre pressure monitoring
control unit
×
×
×
×
Steering angle sensor
×
×
×
×
Smart entrance control unit
×
×
×
×
×
×
×
×
Combination meter
×
×
×
×
×
×
×
×
Can communication type
BRC-6
[ABS]
CAN COMMUNICATION
TYPE 23,TYPE24/TYPE31, TYPE32
System diagram
●
LHD models (Type23, Type24)
●
RHD models (Type31, Type32)
Input/output signal chart
T: Transmit R: Receive
SKIA1525E
SKIA1539E
Signals
ECM
ABS actuator
and electric
unit (control
unit)
Smart entrance
control unit
Tyre pressure
monitoring
control unit
Combination
meter
Engine speed signal
T
R
Air conditioner switch signal
R
T
MI signal
T
R
Glow indicator lamp signal
*1
T
R
Engine coolant temperature signal
T
R
Fuel consumption signal
T
R
Vehicle speed signal
T
R
R
R
T
Seat belt reminder signal
R
T
Lighting switch position signal
T
R
Flashing indicator signal
T
R
Engine cooling fan speed signal
T
R
Child lock indicator signal
T
R
Door switches state signal
T
R
A/C compressor signal
T
R
Tyre pressure signal
T
R
CAN COMMUNICATION
BRC-7
[ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
TYPE 27/TYPE28
System diagram
●
LHD models (Type27, Type28)
Input/output signal chart
T: Transmit R: Receive
SKIA1525E
Signals
ECM
ABS actuator
and electric
unit (control
unit)
Smart entrance
control unit
Tyre pressure
monitoring
control unit
Combination
meter
Engine speed signal
T
R
ABS operation signal
R
T
MI signal
T
R
Glow indicator lamp signal
T
R
Engine coolant temperature signal
T
R
Fuel consumption signal
T
R
Vehicle speed signal
R
T
R
R
T
Seat belt reminder signal
R
T
Lighting switch position signal
T
R
Flashing indicator signal
T
R
Engine cooling fan speed signal
T
R
Child lock indicator signal
T
R
Door switches state signal
T
R
A/C compressor signal
T
R
Tyre pressure signal
T
R
BRC-8
[ABS]
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
PFP:00004
Fail-safe Function
EFS002VZ
●
If a malfunction occurs in ABS electrical system, and control unit detects the malfunction, ABS warning
light on gauge turns ON to inform driver of system malfunction.
How to Proceed with Trouble Diagnosis
EFS002W0
BASIC CONCEPT
●
The most important point to perform trouble diagnosis is to understand vehicle systems (control and
mechanism) thoroughly.
●
It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptoms by driving vehicle with
customer.
CAUTION:
Customers are not professional. It is dangerous to make an
easy guess like “maybe the customer means that...,” or
“maybe the customer mentions this symptom”.
●
It is essential to check symptoms right from the beginning in
order to repair a malfunction completely.
For intermittent malfunction, reproduce symptom based on inter-
view with customer and past examples. Do not perform inspec-
tion on ad hoc basis. Most intermittent malfunctions are caused
by poor contacts. In this case, it will be effective to shake sus-
pected harness or connector by hand. When repairing without
any symptom diagnosis, you can not judge if malfunction has
actually been eliminated.
●
After completing diagnosis, always erase diagnostic memory.
Refer to
BRC-17, "CONSULT-II Functions"
.
●
For intermittent malfunction, move harness or harness connector by hand. Then check poor contact or
false open circuit.
●
Always read “GI Section”
to check the general guidelines and to confirm the gen-
eral precautions.
SEF234G
SEF233G
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