NISSAN ALMERA TINO 2001 Service Repair Manual

Precautions for Supplemental Restraint System
(SRS) ªAIR BAGº and ªSEAT BELT
PRE-TENSIONERº
NLEC1263The Supplemental Restraint System ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº, used along with a seat
belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The
Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and
on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning
lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used along
with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side col-
lision. The supplemental side air bag consists of air bag modules (located in the outer side of front seats),
satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal collision),
wiring harness, warning lamp (one of components of supplemental 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 must be performed
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.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified with yellow harness connector (and with
yellow harness protector or yellow insulation tape before the harness connectors).
SEF706Y
Engine Fuel & Emission Control SystemNLEC0602+Always use a 12 volt battery as power source.
+Do not attempt to disconnect battery cable 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.
+Before removing parts, turn off ignition switch and then
disconnect battery ground cable.
SEC220B
+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.
PRECAUTIONSYD22DDTI
Precautions for Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
EC-1066

SEF883Y
+When ECM is removed for inspection, make sure to
ground the ECM mainframe.
SEF881Y
+When connecting ECM harness connectors, push in both
sides of the connector until you hear a click. Maneuver the
lever until you hear the three connectors on the inside
click. Refer to the figure at left.
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 terminal, when connecting pin connectors.
+Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge)
voltage to develop in the circuit, thus resulting in damage
to ICs.
+Keep ECM harness at least 10 cm (3.9 in) away from adja-
cent harnesses, to prevent an ECM system malfunction
due to receiving external noise, degraded operation of
ICs, etc.
+Keep ECM parts and harnesses dry.
MEF040D
+Before replacing ECM, perform Terminals and Reference
Value inspection and make sure ECM functions properly.
Refer to EC-1129.
PRECAUTIONSYD22DDTI
Engine Fuel & Emission Control System (Cont'd)
EC-1067

SAT652J
+If MI illuminates or blinks irregularly when engine is
running, water may have accumulated in fuel filter. Drain
water from fuel filter. If this does not correct the problem,
perform specified trouble diagnostic procedures.
+After performing each TROUBLE DIAGNOSIS, perform
ªDTC Confirmation Procedureº or ªOverall Function
Checkº.
The DTC should not be displayed in the ª DTC Confirma-
tion Procedureº if the repair is completed. The ªOverall
Function Checkº should be a good result if the repair is
completed.
SEF348N
+When measuring ECM signals with a circuit tester, never
allow the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
+Do not use ECM ground terminals when measuring input/
output voltage. Doing so may result in damage to the
ECM's transistor. Use a ground other than ECM terminals,
such as the ground.
+Install the break-out box between ECM and ECM harness
connectors when measuring ECM input/output voltage.
SEF437Y
+Do not disconnect electronic control fuel injection pump
harness connector with engine running.
+Do not disassemble electronic control fuel injection pump.
If NG, take proper action.
+Do not disassemble injection nozzle.
If NG, replace injection nozzle.
+Even a slight leak in the air intake system can cause seri-
ous problems.
+Do not shock or jar the crankshaft position sensor (TDC).
SEF709Y
+Do not depress accelerator pedal when starting.
+Immediately after starting, do not rev up engine unneces-
sarily.
+Do not rev up engine just prior to shutdown.
PRECAUTIONSYD22DDTI
Engine Fuel & Emission Control System (Cont'd)
EC-1068

SEF708Y
Engine Fuel & Emission Control System (Cont'd)

Special Service ToolsNLEC0605
Tool number
Tool nameDescription
KV111060S0
Removal/Installation tool
kit for fuel injection pump
NT814
KV109E0010
Break-out box
NT825
KV109E0050
Y-cable adapter
NT826
PREPARATIONYD22DDTI
Special Service Tools
EC-1070

Engine Control Component Parts LocationNLEC0607For details of ECM location, refer to ªELECTRICAL UNIT LOCATIONº in EL section (EL-442).
NEF322A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD22DDTI
Engine Control Component Parts Location
EC-1071

SEF747Z
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD22DDTI
Engine Control Component Parts Location (Cont'd)
EC-1072

NEF323A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD22DDTI
Engine Control Component Parts Location (Cont'd)
EC-1073

Circuit DiagramNLEC0608MODELS WITH ECM IN ENGINE COMPARTMENTNLEC0608S03
YEC720
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD22DDTI
Circuit Diagram
EC-1074

MODELS WITH ECM IN CABINNLEC0608S04
YEC856
ENGINE AND EMISSION CONTROL OVERALL SYSTEMYD22DDTI
Circuit Diagram (Cont'd)
EC-1075