1999 NISSAN PRIMERA Control

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