NISSAN ALMERA TINO 2001 Service Repair Manual

Engine Control Component Parts LocationNLEC0009For more details for ECM location, refer to ªELECTRICAL UNIT LOCATIONº in EL section.
NEF310A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Engine Control Component Parts Location
EC-26

NEF311A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Engine Control Component Parts Location (Cont'd)
EC-27

NEF312A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Engine Control Component Parts Location (Cont'd)
EC-28

SEF599Y
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Engine Control Component Parts Location (Cont'd)
EC-29

Circuit DiagramNLEC0010MODELS WITH THROTTLE POSITION SWITCH AND SWIRL CONTROL VALVENLEC0010S01
YEC649
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Circuit Diagram
EC-30

MODELS WITHOUT THROTTLE POSITION SWITCH AND SWIRL CONTROL VALVENLEC0010S02
YEC871
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Circuit Diagram (Cont'd)
EC-31

System DiagramNLEC0011
NEF313A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
System Diagram
EC-32

Vacuum Hose DrawingNLEC0012Refer to ªSystem Diagramº on EC-32 for vacuum control system.
NEF314A
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
Vacuum Hose Drawing
EC-33

System ChartNLEC0013
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 (where fitted)
+Battery voltage
+Power steering oil pressure switch
+Vehicle speed sensor
+Intake air temperature sensor
+Heated oxygen sensor 2 (rear)*2
+Closed throttle position switch (where fitted)
+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 (where fitted)EGR volume control valve
(where fitted)
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 (where fitted)Swirl control valve control sole-
noid (where fitted)
*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.
ENGINE AND EMISSION CONTROL OVERALL SYSTEMQG18DE
System Chart
EC-34

Multiport Fuel Injection (MFI) System
DESCRIPTIONNLEC0014Input/Output Signal ChartNLEC0014S01
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 SystemNLEC0014S02The 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 CompensationNLEC0014S03In 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
+High-load, high-speed operation

+During deceleration
+During high engine speed operation
+During high vehicle speed operation
+Extremely high engine coolant temperature
ENGINE AND EMISSION BASIC CONTROL SYSTEM
DESCRIPTION
QG18DE
Multiport Fuel Injection (MFI) System
EC-35