Infiniti I30 (A33). Manual — part 118
DATA MONITOR MODE
NHBR0110S05
MONITOR ITEM
CONDITION
SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR
Drive vehicle.
(Each wheel is rotating.)
Displays computed vehicle speed from wheel sensor signal.
Almost the same speed as speedometer.
STOP LAMP SW
Turn ignition switch ON and
depress brake pedal.
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
RL IN SOL
RL OUT SOL
Ignition switch is turned ON or
engine is running.
Operating conditions for each solenoid valve are indicated.
ABS is not operating: OFF
ACTUATOR RLY
Ignition switch is turned ON or
engine is running.
Displays ON/OFF condition of ABS actuator relay.
When turning ignition switch ON, ABS actuator relay is oper-
ated.
MOTOR RELAY
ABS is not operating: OFF
ABS is operating: ON
WARNING LAMP
Warning lamp is turned on: ON
Warning lamp is turned off: OFF
BATTERY VOLT
Power supply voltage for control unit
ACTIVE TEST MODE
NHBR0110S06
TEST ITEM
CONDITION
JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
RR RH SOLENOID
RR LH SOLENOID
Ignition switch is turned ON.
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
OFF: Motor stops
NOTE:
Active test will automatically stop ten seconds after the test starts. (TEST IS STOPPED monitor shows ON.)
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
ABS
CONSULT-II Inspection Procedure (Cont’d)
BR-55
SEF233G
SEF234G
How to Perform Trouble Diagnoses for Quick
and Accurate Repair
NHBR0111
INTRODUCTION
NHBR0111S01
The ABS system has an electronic control unit to control major
functions. The control unit accepts input signals from sensors and
instantly drives actuator. It is essential that both kinds of signals are
proper and stable. It is also important to check for conventional
problems: such as air leaks in the booster or 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 just a few minutes to talk
with a customer who approaches with a ABS complaint. The cus-
tomer is a very good source of information on such problems;
especially intermittent ones. Through the talks with the customer,
find out what symptoms 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 controlled vehicle. Also check related Service Bulletins for
information.
TROUBLE DIAGNOSIS — INTRODUCTION
ABS
How to Perform Trouble Diagnoses for Quick and Accurate Repair
BR-56
Preliminary Check
NHBR0112
1
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 and/or has brake fluid been contaminated?
Yes
©
GO TO 2.
No
©
Repair. GO TO 2.
2
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
©
GO TO 3.
No
©
Repair. GO TO 3.
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TROUBLE DIAGNOSIS — BASIC INSPECTION
ABS
Preliminary Check
BR-57
3
CHECK BRAKE BOOSTER OPERATION
Check brake booster for operation and air tightness.
Refer to BR-21.
SBR058C
Is brake booster airtight and functioning properly?
Yes
©
GO TO 4.
No
©
Replace. GO TO 4.
4
CHECK BRAKE PAD AND ROTOR
Check brake pad and rotor.
Refer to BR-24, BR-26, BR-28, BR-32.
SBR059C
Are brake pads and rotors functioning properly?
Yes
©
GO TO 5.
No
©
Replace.
TROUBLE DIAGNOSIS — BASIC INSPECTION
ABS
Preliminary Check (Cont’d)
BR-58
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