2001 NISSAN ALMERA battery

ABS Actuator and Electric UnitNJBR0111S10
SBR630E
REMOVALNJBR0111S10011. Disconnect battery cable.
2. Drain brake fluid.
3. Remove mounting bracket fixing bolts and nuts.
4. Disconnect connector, brake pipes and remove fixing nuts.
INSTALLATIONNJBR0111S1002CAUTION:
After installation, refill brake fluid. Then bleed air.
1. Connect brake pipes temporarily.
2. Tighten fixing bolts and nuts.
3. Tighten brake pipes.
4. Connect connector and battery cable.
REMOVAL AND INSTALLATIONABS
ABS Actuator and Electric Unit
BR-98

Removal and InstallationNJBT0012CAUTION:
+Disconnect ground terminal from battery in advance.
+Disconnect air bag system line in advance.
+Never tamper with or force air bag lid open, as this may adversely affect air bag performance.
+Be careful not to scratch pad and other parts.
INSTRUMENT PANEL ASSEMBLY
Removal and Installation
BT-25

Removal and InstallationNJBT0018+When removing or installing the seat trim, carefully handle it to keep dirt out and avoid damage.
HFor Wiring Diagram, refer to EL-288, ªWiring Diagram Ð HEATED SEAT к.
CAUTION:
+Before removing the front seat, turn the ignition switch off, disconnect both battery cables and wait
at least 3 minutes.
+Do not drop, tilt, or bump the side air bag module installed in the seat. Always handle it with care.
+Disconnect the side air bag harness connector and heated seat harness connector from under the
seat before removing the seat.
+Disconnect the side air bag harness connector before removing the seat back. Refer to RS-36,
ªFront Side Air Bag Moduleº for details.
FRONT SEAT
Removal and Installation
BT-56

Diagnostic Procedure ..............................................790
DTC P1603 ECM 12, DTC P1607 ECM 2...................792
Description ...............................................................792
On Board Diagnosis Logic.......................................792
DTC Confirmation Procedure ..................................792
Diagnostic Procedure ..............................................793
DTC P1620 ECM RLY.................................................794
ECM Terminals and Reference Value .....................794
On Board Diagnosis Logic.......................................794
DTC Confirmation Procedure ..................................794
Wiring Diagram ........................................................795
Diagnostic Procedure ..............................................797
DTC P1621 ECM 15....................................................799
Description ...............................................................799
On Board Diagnosis Logic.......................................799
DTC Confirmation Procedure ..................................799
Diagnostic Procedure ..............................................800
DTC P1660 BATTERY VOLTAGE..............................801
On Board Diagnosis Logic.......................................801
DTC Confirmation Procedure ..................................801
Diagnostic Procedure ..............................................801
DTC P1690 P5.PUMP C/MODULE.............................803
Description ...............................................................803
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................803
ECM Terminals and Reference Value .....................804
On Board Diagnosis Logic.......................................804
DTC Confirmation Procedure ..................................804
Diagnostic Procedure ..............................................805
GLOW CONTROL SYSTEM.......................................806
Description ...............................................................806
ECM Terminals and Reference Value .....................807Wiring Diagram ........................................................808
Diagnostic Procedure ..............................................809
EGR VOLUME CONTROL SYSTEM..........................815
Description ...............................................................815
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................816
ECM Terminals and Reference Value .....................816
Wiring Diagram ........................................................817
Diagnostic Procedure ..............................................819
START SIGNAL...........................................................823
Wiring Diagram ........................................................823
Diagnostic Procedure ..............................................824
PARK/NEUTRAL POSITION (PNP) SWITCH
(WHERE FITTED)........................................................826
Description ...............................................................826
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................826
ECM Terminals and Reference Value .....................826
Wiring Diagram ........................................................827
Diagnostic Procedure ..............................................828
AIR CONDITIONER CONTROL..................................830
Wiring Diagram ........................................................830
MI & DATA LINK CONNECTORS..............................831
Wiring Diagram ........................................................831
SERVICE DATA AND SPECIFICATIONS (SDS).......834
General Specifications .............................................834
Injection Nozzle .......................................................834
Engine Coolant Temperature Sensor ......................834
Crankshaft Position Sensor (TDC) ..........................834
Glow Plug ................................................................834
Accelerator Position Sensor ....................................834
EGR Volume Control Valve .....................................834
CONTENTS(Cont'd)
EC-9

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NJEC0002The Supplemental Restraint System such as ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL N16 is as follows (The compo-
sition varies according to the destination and optional equipment.):
+For a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steer-
ing wheel), front passenger air bag module (located on the instrument panel on passenger side), front seat
belt pre-tensioners, a diagnoses sensor unit, warning lamp, wiring harness and spiral cable.
+For a side collision
The Supplemental Restraint System consists of front side air bag module (located in the outer side of front
seat), side air bag (satellite) sensor, diagnoses sensor unit (one of components of air bags for a frontal
collision), wiring harness, warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance should be per-
formed by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harness can be identified by yellow harness connector.
Precautions for On Board Diagnostic (OBD)
System of Engine and A/T
NJEC0003The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
+Be sure to turn the ignition switch ªOFFº and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MI to light up.
+Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
+Certain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector.
For description and how to disconnect, refer to EL section, ªDescriptionº, ªHARNESS CONNEC-
TORº.
+Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MI to light up due to the short circuit.
+Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to the malfunction of fuel injection system, etc.
+Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission Control Module) before returning the vehicle to the customer.
PRECAUTIONSQG
Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
EC-16

SEF706Y
Engine Fuel & Emission Control System=NJEC0004+Always use a 12 volt battery as power source.
+Do not attempt to disconnect battery cables while engine
is running.
+Before connecting or disconnecting the ECM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
ECM because battery voltage is applied to ECM even if
ignition switch is turned off.
SEF707Y
+Do not disassemble ECM.
+If a battery terminal is disconnected, the memory will
return to the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slightly when the terminal is
disconnected. However, this is not an indication of a prob-
lem. Do not replace parts because of a slight variation.
SEF908W
+When connecting or disconnecting ECM harness
connector, use lever as shown.
When connecting, fasten connector securely with lever
moved until it stops.
SEF291H
+When connecting or disconnecting pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM
pin terminals when connecting pin connectors.
+Securely connect ECM harness connectors.
A Poor connection can cause an extremely high (surge)
voltage to develop in coil and condenser, thus resulting in
damage to ICs.
+Keep ECM harness at least 10 cm (4 in) away from adja-
cent harness, to prevent an ECM system malfunctions due
to receiving external noise, degraded operation of ICs, etc.
+Keep ECM parts and harness dry.
PRECAUTIONSQG
Engine Fuel & Emission Control System
EC-17

System ChartNJEC0013
Input (Sensor) ECM Function Output (Actuator)
+Camshaft position sensor (PHASE)
+Crankshaft position sensor (POS)
+Mass air flow sensor
+Engine coolant temperature sensor
+Heated oxygen sensor 1 (front)
+Ignition switch
+Throttle position sensor
+PNP switch
+Air conditioner switch
+Knock sensor
+EGR temperature sensor*1, *4
+Fuel tank temperature sensor*1, *4
+Battery voltage
+Power steering oil pressure switch
+Vehicle speed sensor
+Intake air temperature sensor
+Heated oxygen sensor 2 (rear)*2
+TCM (Transmission Control Module)*3
+Closed throttle position switch
+Electrical load
+Refrigerant pressure sensorFuel injection & mixture ratio control Injectors
Electronic ignition system Power transistor
Idle air control system IACV-AAC valve
Intake valve timing controlIntake valve timing control sole-
noid valve
Fuel pump control Fuel pump relay
On board diagnostic systemMalfunction indicator
(On the instrument panel)
EGR control*4 EGR volume control valve*4
Heated oxygen sensor 1/2 heater (front/
rear) controlHeated oxygen sensor 1/2 heater
(front/rear)
EVAP canister purge flow controlEVAP canister purge volume con-
trol solenoid valve
Cooling fan control Cooling fan relay
Air conditioning cut control Air conditioner relay
Swirl control valve control*4Swirl control valve control sole-
noid*4
*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis.
*2: Under normal conditions, this sensor is not for engine control operation.
*3: The DTC related to A/T will be sent to ECM.
*4: If so equipped
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG
System Chart
EC-31

Multiport Fuel Injection (MFI) System
DESCRIPTIONNJEC0014Input/Output Signal ChartNJEC0014S01
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS) Engine speed
Fuel injec-
tion & mix-
ture ratio
controlInjector Camshaft position sensor (PHASE) Engine speed and cylinder number
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 (front) Density of oxygen in exhaust gas
Throttle position sensorThrottle position
Throttle valve idle position
PNP switch Gear position
Vehicle speed sensor Vehicle speed
Ignition switch Start signal
Air conditioner switch Air conditioner operation
Knock sensor Engine knocking condition
Electrical load Electrical load signal
Battery Battery voltage
Power steering oil pressure switch Power steering operation
Heated oxygen sensor 2 (rear)* Density of oxygen in exhaust gas
* Under normal conditions, this sensor is not for engine control operation.
Basic Multiport Fuel Injection SystemNJEC0014S02The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from both the camshaft position sensor and the mass air
flow sensor.
Various Fuel Injection Increase/Decrease CompensationNJEC0014S03In addition, the amount of fuel injected is compensated to improve engine performance under various oper-
ating conditions as listed below.

+During warm-up
+When starting the engine
+During acceleration
+Hot-engine operation
+When selector lever is changed from ªNº to ªDº (A/T models)
+High-load, high-speed operation

+During deceleration
+During high engine speed operation
+During high vehicle speed operation (M/T models)
+Extremely high engine coolant temperature
ENGINE AND EMISSION BASIC CONTROL SYSTEM DESCRIPTIONQG
Multiport Fuel Injection (MFI) System
EC-32