Get the complete details about Engine Control Module System and how to control our engine.

1. Engine Control Module System

2.  Engine control module is known as power train
control module or engine control unit

3. Requirement In A Car

4. Requirement
The main function
of this controllers is
to get information
from sensors & run
certain actuator.
When getting any
problem, then ECU
shows a check engine
light in engine
display.

5. Types Of Sensors

6. Types Of Sensors
1- Engine coolant
temperature sensor
2- Air temperature sensor
3- Manifold absolute pressure
sensor
4- Mass air flow sensor
5- Idle air controller
6- Crankshaft sensor
7- Camshaft sensor
8- Throttle position sensor
9- Oxygen sensor
10- Knock sensor

7. Engine Coolant Temperature Sensor

8. Its function is to instruct radiator fan to turn
on and cooling down the liquid after getting
temperature above 75 degree.
Its is usually located at the bottom of
radiator or top radiator hose towards engine
block.
Function

9. Air Temperature Sensor

10. Function
Air temperature
sensor tells
temperature of air
going into engine.
It is usually
located in air filter
box or pipe that is
attached to the air
filter box.

11. Manifold Absolute Pressure Sensor

12. Function
This sensor measures air pressure which
tells ECM the current altitude of a vehicle.
It is bolted on the intake manifold or
linked with a vacuum pipe from intake
manifold.

13. Mass Air Flow Sensor

14. Uses
This type of sensor measures
the volume of air entering into
engine.
It produces more current to
keep temperature required by
the manufacturer, it is located
on air cleaner box.

15. Idle Air Controller

16. Uses
It works for keeping rpm of
engine steady, it is an actuator
not a sensor.
It increases the rpm of car until
the coolant temperature sensor
indicates the high engine
temperature .

17. Crank Shaft Sensor

18. Uses

19. Camshaft Sensor

20. The sensor
contacts with
ECM for position
of camshaft, it is
fixed at the end
of camshaft.
It is an
electromagnetic
sensor which
produces
voltage when a
metal object
moves past it.
Uses

21. Throttle Position Sensor

22. This sensor is linked with accelerator
pedal and the throttle body, sends
information about injector pulse width
Uses
& spark timing.
It is located in throttle body and it is
not washable nor repairable.

23. Oxygen Sensor

24. Uses Of The Sensor
 It can detect the oxygen content so as to know about fuel
amount consumed by the engine.
 There are two types of oxygen sensors, one is zirconia and
another one is titania.

25. Knock Sensor

26. Uses
This sensor contains a
crystal & the crystal
detects mechanical stress
and produces a voltage
when the car knocks.
It also allows different
grade fuel without any
type of engine problem &
it is fixed in engine body.

27. What Happens When Any sensor Fails

28. Sometime sensors get
failed and do not function
properly.
When getting any type of
problem in sensor, then
immediately change the
sensor or repair if
possible.

29. http://www.jacksgermanauto.com/