NISSAN ALMERA N16 2003 Electronic Repair Manual

This components controls the hydraulic circuit and increases, holds
or decreases hydraulic pressure to all or individual wheels. The
ABS actuator and electric unit can not be disassembled and can
be only serviced as an assembly.
ABS Actuator OperationNJBR0087S0301
Inlet solenoid
valveOutlet solenoid
valve
Normal brake operation OFF (Open) OFF (Closed)Master cylinder brake fluid pressure is directly
transmitted to caliper via the inlet solenoid valve.
ABS operationPressure hold ON (Closed) OFF (Closed)Hydraulic circuit is shut off to hold the caliper brake
fluid pressure.
Pressure
decreaseON (Closed) ON (Open)Caliper brake fluid is sent to reservoir via the outlet
solenoid valve. Then it is pushed up to the master
cylinder by pump.
Pressure
increaseOFF (Open) OFF (Closed)Master cylinder brake fluid pressure is transmitted
to caliper.
GI
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DESCRIPTIONABS
System Description (Cont’d)
BR-47

Component Parts and Harness Connector
Location
NJBR0088
NBR432
DESCRIPTIONABS
Component Parts and Harness Connector Location
BR-48

SchematicNJBR0089
YBR301
GI
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LC
EC
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DESCRIPTIONABS
Schematic
BR-49

Wiring Diagram — ABS —NJBR0090
YBR302
DESCRIPTIONABS
Wiring Diagram — ABS —
BR-50

YBR303
GI
MA
EM
LC
EC
FE
CL
MT
AT
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SU
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BT
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DESCRIPTIONABS
Wiring Diagram — ABS — (Cont’d)
BR-51

YBR304
DESCRIPTIONABS
Wiring Diagram — ABS — (Cont’d)
BR-52

YBR305
GI
MA
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LC
EC
FE
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SU
ST
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BT
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DESCRIPTIONABS
Wiring Diagram — ABS — (Cont’d)
BR-53

Trouble Diagnosis Chart by SymptomNJBR0159CHECK ITEMS LISTNJBR0159S01When ABS and warning lamps illuminate, perform self-diagnosis.
Symptom Condition Check items Reference page
ABS warning lamp does not illuminate with
ignition ON. (ABS warning lamp check)IGN-ONBlown ABS warning lamp bulb
Blown fuse between ignition and ABS
warning lamp.
Open circuit of wiring between ignition
and ABS warning lamp.
Malfunction in ABS systemBR-65
ABS warning lamp illuminates with ignition
ON, but does not illuminates off after a few
seconds. (ABS warning lamp has been illu-
minated.)IGN-ONABS actuator and electric unit connector
disconnected
Malfunction in ABS systemBR-65
ABS actuator and electric unit Input/Output
Signal Standard
NJBR0160SPECIFICATIONS DEFINED BY CONSULT-IINJBR0160S01
Items to be monitored ContentsData monitor(Reference)
Check points when
result was malfunction-
ing ConditionReference values in nor-
mal operation
Wheel sensor FR,
FL, RR, RL
[km/h (MPH)]Vehicle wheel speedWhen the vehicle is
stopped0 km/h (0 MPH)
Wheel sensor and har-
ness
While driving (note:1)Almost in accordance
with speedometer dis-
play (within±10%)
Stop lamp switch Brake pedal statusDepress the brake
pedal.ON
Stop lamp switch and
path
Release brake pedal. OFF
ENGINE RPM SIGNAL
[STOP/RUN]With engine runningEngine RPM below 400
rpmSTOP
Engine RPM signal path
Engine RPM 400 rpm or
higherRUN
ABS inlet S/V
FR, FL, RR, RL
(ON/OFF)
Solenoid valve operationActuator and electric
unit (solenoid valve) is
activated (by active test
mode of CONSULT-II) or
actuator relay is not acti-
vated (in fail-safe mode,
before starting engine)ON
ABS solenoid valve path
ABS outlet S/V
FR, FL, RR, RL
(ON/OFF)Actuator and electric
unit (solenoid valve) is
not activated and actua-
tor relay is activated
(vehicle stopped with
(Engine running)OFF
ABS actuator relay (ON/
OFF)Actuator relay activatedVehicle stopped
Ignition switch ONOFF
ABS actuator relay and
harness
Vehicle stopped
Engine runningON
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
Trouble Diagnosis Chart by Symptom
BR-54

Items to be monitored ContentsData monitor(Reference)
Check points when
result was malfunction-
ing ConditionReference values in nor-
mal operation
ABS motor relay
(ON/OFF)Motor relay and motor
activated(Ignition switch ON or
engine is running): ABS
inactiveOFF
ABS motor and motor
relay harness
(Ignition switch ON or
engine is running): ABS
activeON
Warning lamp
(ON/OFF)ABS warning lamp ON
condition (Note 2)ABS warning lamp ON ON
ABS warning lamp and
path ABS warning lamp OFF
conditionOFF
POWER VOLTAGE (V)Battery voltage supplied
to control moduleIgnition switch ON Approx. 10 - 16 VControl unit power sup-
ply circuit
CAUTION:
1) Check air pressure of tire under normal condition.
2) ABS warning lamp ON/OFF timing
ON: When ignition switch is turned ON (before engine starts) or when malfunction is detected
OFF: After engine is started (When the system is in normal condition)
CONSULT-II FunctionsNJBR0161CONSULT-II FUNCTION APPLICATION TABLENJBR0161S01
Item Self-diagnosis Data monitor Active test
FR RH SENSOR××-
FR LH SENSOR [OPEN]××-
RR RH SENSOR××-
RR LH SENSOR××-
Speed sensor×--
Stop lamp switch -×-
FR RH IN ABS SOL×××
FR RH OUT ABS SOL×××
FR LH IN ABS SOL×××
FR LH OUT ABS SOL×××
RR RH IN ABS SOL×××
RR RH OUT ABS SOL×××
RR LH IN ABS SOL×××
RR LH OUT ABS SOL×××
ABS ACTUATOR RELAY××-
ABS MOTOR RELAY×××
ABS warning lamp -×-
Battery voltage××-
Control module×--
×: Applicable
–: Not applicable
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
ABS actuator and electric unit Input/Output Signal Standard (Cont’d)
BR-55

SELF-DIAGNOSISNJBR0161S02Operation ProcedureNJBR0161S02011. After obtaining customer’s information, perform BR-62, “Basic
inspection”.
SEF378Y
2. After turning ignition switch OFF, connect CONSULT-II connec-
tor to data link connector on vehicle.
3. Start engine and drive at Approx. 30 km/h (19 MPH) for
Approx. 1 minute.
MBIB0233E
4. Stop vehicle. With engine at idle, touch “START (NISSAN
BASED VHCL)”, “ABS” and “SELF-DIAG RESULTS” on CON-
SULT-II screen in this order.
CAUTION:
“ABS” may not be displayed on the system selection screen
in the following case: When “START (NISSAN BASED VHCL)”
was touched just after engine is started or ignition switch is
turned to ON. In this case, repeat procedure from step 2.
5. Self-diagnosis result is displayed. (If necessary, touch “PRINT”
to print self-diagnosis result.)
If “NO MALFUNCTION” is displayed, check ABS warning
lamp. Refer to BR-63, “BASIC INSPECTION 3 ABS WARNING
LAMP INSPECTION”.
6. Check the faulty part indicated by the chart to repair or replace.
7. Start engine and drive at Approx. 30 km/h (19 MPH) for
Approx. 1 minute.
CAUTION:
Check again to make sure that there is NO FAILURE on
other parts.
If wheel sensor [SHORT] is detected, ABS warning lamp
does not turn off until following conditions: Vehicle is
driven at Approx. 30 km/h (19 MPH) for Approx. 1 minute,
even in normal conditions.
8. Turn OFF ignition switch to prepare for erasing memory.
9. Start engine. Touch “START (NISSAN BASED VHCL)”, “ABS”,
“SELF-DIAG RESULTS” and “ERASE MEMORY” on CON-
SULT-II screen in this order to erase fault memory.
CAUTION:
If memory cannot be erased, proceed to 6.
10. Drive at Approx. 30 km/h (19 MPH) for Approx. 1 minute. Be
sure ABS warning lamp is OFF.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Functions (Cont’d)
BR-56