Nissan Frontier D22. Instruction — part 169
GENERAL INFORMATION
BRC-7
[ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
GENERAL INFORMATION
PFP:00000
Fail-Safe
EFS003GL
ABS SYSTEM
If a malfunction occurs in electrical system, ABS warning lamp in combination meter turns ON. In this condi-
tion, the fail-safe function puts ABS and electronic brake force distribution (EBD) into one of the following con-
ditions.
1.
Only EBD operates.
2.
ABS and EBD do not operate. All 4 wheels operate as normal brakes.
NOTE:
In step 1 shown above, self-diagnosis when ignition switch is turned ON and when vehicle starts at initial time
is carried out. ABS self-diagnosis noise may be heard as usual.
CAUTION:
If fail-safe mode is initiated, carry out self-diagnosis for ABS control system.
Hydraulic Circuit Diagram
EFS003GM
CAUTION:
●
When installing parts, avoid twist and fracture conditions.
●
Make sure there is no interference with other parts when turning steering both clockwise and
counterclockwise.
●
Brake system is an important safety part. If a brake fluid leak is detected, always disassemble the
affected part. If a malfunction is detected, replace it with a new one.
ABS Function
EFS003GN
1.
During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
LFIA0173E
1.
Inlet solenoid valve
2.
Outlet solenoid valve
3.
Reservoir
4.
Pump
5.
Motor
6.
Inlet valve
7.
Outlet valve
8.
Bypass check valve
9.
Damper
10. Pressure switch
BRC-8
[ABS]
GENERAL INFORMATION
2.
When starting engine, or just after starting vehicle, brake pedal may vibrate or motor operating noises
may be heard from engine compartment. This is a normal status of operation check.
3.
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
4.
EBD is integrated in ABS system.
System Diagram
EFS003GO
LFIA0189E
TROUBLE DIAGNOSIS
BRC-9
[ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
TROUBLE DIAGNOSIS
PFP:00004
How to Proceed With Diagnosis
EFS003GP
BASIC CONCEPT
●
Most important point to perform 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,
it 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 diagnosis, make sure to carry out “erase memory”. Refer to
●
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.
SEF234G
SEF233G
BRC-10
[ABS]
TROUBLE DIAGNOSIS
DIAGNOSIS FLOWCHART
LFIA0175E
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