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Infiniti G35 (V35). Manual - part 237

SYSTEM DESCRIPTION

BRC-9

[VDC/TCS/ABS]

BRC

Hydraulic Pressure Control System Diagram

NFS0006N

CAN Communication

NFS000KE

SYSTEM DESCRIPTION

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-47, "CAN Sys-

tem Specification Chart"

SFIA0831E

BRC-10

[VDC/TCS/ABS]

TROUBLE DIAGNOSIS

PFP:00004

Fail-Safe Function

NFS000KL

VDC/TCS SYSTEM

In case of Throttle Control System trouble, the VDC OFF indicator lamp and SLIP indicator lamp are turned
on, and the condition of the vehicle is the same as the condition of vehicles without VDC/TCS equipment. In
case of trouble to the Throttle Control System, the ABS control continues to operate normally without VDC/
TCS control.

CAUTION:

If the Fail-Safe function is activated, then perform the self diagnosis for VDC/TCS/ABS control system.

ABS, EBD SYSTEM

In case of the electrical problems with the ABS, the ABS warning lamp, VDC OFF indicator lamp and SLIP
indicator lamp will turn on. In case of the electrical problem with the EBD, brake warning lamp, ABS warning
lamp, VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABS
become one of the following conditions of the Fail-Safe function.

●

For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
cle without TCS/ABS equipment.

NOTE:
ABS self diagnosis sound may be heard. That is a normal condition because a self diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

●

For EBD trouble, the EBD and ABS become inoperative, and the condition of the vehicle is the same as
the condition of vehicles without TCS/ ABS, EBD equipment.

How to Perform Trouble Diagnoses

NFS0006T

BASIC CONCEPT

●

Most important point to perform diagnostic 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.

NOTE:
Customers are not professionals. Do not assume “maybe cus-
tomer 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-26, "ERASE MEMORY"

●

For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.

●

Always read “GI General Information” to confirm general precautions. Refer to

GI-3, "PRECAUTIONS"

SEF234G

SEF233G