Control NISSAN PRIMERA 1999 Electronic Repair Manual

Supplemental Restraint System (SRS) ªAIR
BAGº and ªSEAT BELT PRE-TENSIONERº
NCEC0002The 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:
ITo 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.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses (except ªSEAT BELT PRE-TENSIONERº connector) can be
identified with yellow harness connector (and with yellow harness protector or yellow insulation
tape before the harness connectors).
Precautions for On Board Diagnostic (OBD)
System of Engine and CVT
NCEC0003The 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:
IBe 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.
IBe 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.)
ICertain 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.
IBe 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.
IBe 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 the fuel injection system, etc.
IBe sure to erase the unnecessary malfunction information (repairs completed) from the ECM and
TCM (Transmission Control Module) before returning the vehicle to the customer.
PRECAUTIONSSR20DE
Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
EC-10

Engine Fuel & Emission Control SystemNCEC0004
SEF331WB
PRECAUTIONSSR20DE
Engine Fuel & Emission Control System
EC-11

Engine Control Component Parts LocationNCEC0009
NEF235A Throttle position sensor
IACV-AAC valve
Mass air flow sensor and intake
air temperature sensor
Ignition coil, power transistor &
camshaft position sensor built
into distributor
Crankshaft position sensor Relay box
EVAP purge volume
control solenoid valveHeated oxygen
sensor 1 (front) EVAP canister
Power steering
oil pressure switch
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Engine Control Component Parts Location
EC-15

NEF232A
.IACV-AAC valve
Mass air flow sensor
View from under the vehicle
Crankshaft position
sensor (OBD)Radiator
lower hose Heated oxygen sensor 1
(front) harness connector
Heated oxygen
sensor 1 (front)
View from under the vehicle
Knock sensor
harness connectorKnock sensor
.Drive shaft
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Engine Control Component Parts Location (Cont'd)
EC-16

SEF188X ECM
ECM harness
connectorGlove box
View from under the vehicleFront exhaust tube
Coolant temperature
sensor harness connector
Front
Fuel pump
harness connector
Fuel tank
gauge unit
harness connector
Under rear seat cushion
Front exhaust tubeHeated oxygen
sensor 2 (rear)
Heated oxygen sensor 2 (rear)
Harness connector
EVAP canister purge
volume control solenoid
valve
Oil filler capPower steering
oil pressure switch
EVAP canister (LHD models)
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Engine Control Component Parts Location (Cont'd)
EC-17

SEF189X Intake manifold
collectorFuel pressure
regulatorHeadlamp
(Left side)
Front
Refrigerant
pressure sensor and
harness connector
Power transistorTerminal for ignition coil
Camshaft position sensor,
power transistor and ignition
coil (built into distributor)
Terminal for camshaft position sensor
and power transistor Camshaft position
sensor
Metal tip of ignition coil tower
(Terminal of coil circuit)
NOTE: Power transistor, camshaft position sensor,
and ignition coil have to be replaced as a
distributor assembly.
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Engine Control Component Parts Location (Cont'd)
EC-18

Circuit DiagramNCEC0010
YEC080A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Circuit Diagram
EC-19

System DiagramNCEC0011
YEC117A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
System Diagram
EC-20

Vacuum Hose DrawingNCEC0012Refer to ªSystem Diagramº on EC-SR-20 for vacuum control system.
NOTE:
Do not use soapy water or any type of solvent while installing vacuum hoses or purge hoses.
SEF191X Intake manifold collector
Throttle body
Rear view (Left side)Rear view (Right side)
Intake manifold collector
Fuel pressure
regulator
To brake
booster
Air hose to
power steering
air valve
EVAP purge line to engine
Fuel filter
To EVAP
canister
(RHD models)
EVAP purge volume
control solenoid valve
To EVAP
canister
(LHD models)
Front view
EVAP purge
line to
engine
EVAP canister
(LHD models)
Power steering air valve
To intake manifold
collector
Air tube for power
steering air valve
To EVAP
canister
(RHD models)
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
Vacuum Hose Drawing
EC-21

System ChartNCEC0013
Input (Sensor) ECM Function Output (Actuator)
ICamshaft position sensor
IMass air flow sensor
IEngine coolant temperature sensor
IHeated oxygen sensor 1 (front)
IIgnition switch
IThrottle position sensor
IPNP switch
IAir conditioner switch
IKnock sensor
ICrankshaft position sensor (OBD)*1
IBattery voltage
IPower steering oil pressure switch
IVehicle speed sensor or ABS actuator and
electric unit (control unit)
IIntake air temperature sensor
IHeated oxygen sensor 2 (rear)*2
ITCM (Transmission control module)*3
IClosed throttle position switch
IElectrical load
IRefrigerant pressure sensorFuel injection & mixture ratio control Injectors
Distributor ignition system Power transistor
Idle air control system IACV-AAC valve
Fuel pump control Fuel pump relay
Heated oxygen sensor 1 (front) monitor &
on board diagnostic systemMalfunction indicator
(On the instrument panel)
Heated oxygen sensor1&2(front & rear)
heater controlHeated oxygen sensor1&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
*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 CVT will be sent to ECM.
ENGINE AND EMISSION CONTROL OVERALL SYSTEMSR20DE
System Chart
EC-22