Nissan Silvia. Instruction — part 91
PBR455D
ACTIVE TEST PROCEDURE
=NMBR0099S04
I
When conducting Active test, vehicle must be stationary.
I
When ABS warning lamp stays on, never conduct Active test.
1.
Turn ignition switch OFF.
2.
Connect CONSULT-II to data link connector.
3.
Start engine.
4.
Touch “START” on CONSULT-II screen.
SBR802E
5.
Touch “ABS”.
SBR636E
6.
Touch “ACTIVE TEST”.
SBR638E
7.
Select active test item by touching screen.
SBR639E
8.
Touch “START”.
9.
Carry out the active test by touching screen key.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-47
DATA MONITOR MODE
=NMBR0099S05
MONITOR ITEM
CONDITION
SPECIFICATION
FR RH SENSOR
FR LH SENSOR
REAR SENSOR
Drive vehicle.
(Each wheel is rotating.)
Wheel speed signal
(Almost the same speed as speedometer.)
STOP LAMP SW
Brake is depressed.
Depress the pedal: ON
Release the pedal: OFF
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR IN SOL
RR OUT SOL
1. Drive vehicle at speeds
over 30 km/h (19 MPH) for at
least 1 minute.
2. Engine is running.
Operating conditions for each solenoid valve are indicated. ABS
is not operating: OFF
MOTOR RELAY
ABS is not operating: OFF
ABS is operating: ON
ACTUATOR RELAY
Ignition switch is ON or
engine is running.
Ignition switch ON (Engine stops): OFF
Engine running: ON
WARNING LAMP
ABS warning lamp is turned on: ON
ABS warning lamp is turned off: OFF
BATTERY VOLT
Power supply voltage for control unit
ABS OPER SIG
ABS is not operating: OFF
ABS is operating: ON
ACTIVE TEST MODE
NMBR0099S06
TEST ITEM
CONDITION
JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
RR SOLENOID
Engine is running.
Brake fluid pressure control operation
IN SOL
OUT SOL
UP (Increase):
OFF
OFF
KEEP (Hold):
ON
OFF
DOWN (Decrease):
ON
ON
ABS MOTOR
ABS actuator motor
ON: Motor runs (ABS motor relay ON)
OFF: Motor stops (ABS motor relay OFF)
ABS OPER SIG
Ignition switch is ON or
engine is running.
ON: Set ABS OPER SIG “ON” (ABS is operating.)
OFF: Set ABS OPER SIG “OFF” (ABS is not operating.)
NOTE:
Active test will automatically stop ten seconds after the test starts. (TEST IS STOPPED monitor shows ON.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-48
SEF233G
SEF234G
How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NMBR0100
INTRODUCTION
NMBR0100S01
The ABS system has an electronic control unit to control major
functions. The control unit accepts input signals from sensors and
instantly drives the actuators. It is essential that both kinds of sig-
nals are proper and stable. It is also important to check for conven-
tional problems: such as air leaks in booster lines, lack of brake
fluid, or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the
replacement of good parts.
A visual check only may not find the cause of the problems, so a
road test should be performed.
Before undertaking actual checks, take a few minutes to talk with
a customer who approaches with an ABS complaint. The customer
is a very good source of information on such problems; especially
intermittent ones. By talking to the customer, find out what symp-
toms are present and under what conditions they occur. Start your
diagnosis by looking for “conventional” problems first. This is one
of the best ways to troubleshoot brake problems on an ABS con-
trolled vehicle.
Also check related Service bulletins for information.
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TROUBLE DIAGNOSIS — INTRODUCTION
ABS
How to Perform Trouble Diagnoses for Quick and Accurate Repair
BR-49
Preliminary Check
NMBR0101
1
CHECK BRAKE FLUID
Check brake fluid for contamination.
Has brake fluid been contaminated?
Yes
©
Replace. GO TO 2.
No
©
GO TO 2.
2
CHECK BRAKE FLUID LEVEL
Check brake fluid level in reservoir tank.
Low fluid level may indicate brake pad wear or leakage from brake line.
SBR451D
Is brake fluid filled between MAX and MIN lines on reservoir tank?
Yes
©
GO TO 3.
No
©
Fill up brake fluid. GO TO 3.
3
CHECK BRAKE LINE
Check brake line for leakage.
SBR389C
Is leakage present at or around brake lines, tubes or hoses or are any of these parts cracked or damaged?
Yes
©
Repair. GO TO 4.
No
©
GO TO 4.
TROUBLE DIAGNOSIS — BASIC INSPECTION
ABS
Preliminary Check
BR-50
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