VDC INFINITI M35 2006 Factory Owner's Manual

BRC-10
[VDC/TCS/ABS]
CAN COMMUNICATION
Revision: 2006 January2006 M35/M45
CAN COMMUNICATIONPFP:23710
System DescriptionNFS000QA
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. Refer to LAN-34, "
CAN
Communication Unit" .

TROUBLE DIAGNOSIS
BRC-11
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
TROUBLE DIAGNOSISPFP:00004
How to Perform Trouble DiagnosesNFS000QB
BASIC CONCEPT
The most important point to perform trouble diagnosis is to understand systems (control and mechanism)
in vehicle 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,
they will be necessary to check symptom by driving vehicle with
customer.
CAUTION:
Customers are not professionals. Do not assume “maybe
customer means...” or “maybe customer mentioned this
symptom”.
It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.
After diagnostic, make sure to perform “ERASE MEMORY”.
Refer to BRC-23, "
ERASE MEMORY" .
Always read “GI General Information” to confirm general precau-
tions. Refer to GI-4, "
General Precautions" .
SEF234G
SEF233G

BRC-12
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
DIAGNOSIS FLOW CHART
SFIA3072E

TROUBLE DIAGNOSIS
BRC-13
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
ASKING COMPLAINTS
Complaints against malfunction vary depending on each person.
It is important to clarify customer complaints.
Ask customer about what symptoms are present and under
what conditions. Use information to reproduce symptom while
driving.
It is also important to use diagnostic sheet so as not to miss
information.
EXAMPLE OF DIAGNOSIS WORKSHEET
SBR339B
SFIA0791E

BRC-14
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Component Parts LocationNFS000QC
1. Front wheel sensor 2. ABS actuator and electric unit (con-
trol unit)3. Warning lamp, Indicator lamp
(Combination meter)
4. VDC OFF switch 5. Steering angle sensor 6. Rear wheel sensor
7. Yaw rate/side G sensor
SFIA3017E

TROUBLE DIAGNOSIS
BRC-15
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
Schematic NFS000QD
TFWT0260E

BRC-16
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Wiring Diagram — VDC — NFS000QE
TFWT0261E

TROUBLE DIAGNOSIS
BRC-17
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
TFWT0262E

BRC-18
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
TFWT0263E

TROUBLE DIAGNOSIS
BRC-19
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
TFWT0264E