Kia Forte: Engine Control System / Knock Sensor (KS)
Specifications
Item
|
Specification
|
Resistance(MΩ)
|
4.87
|
Description and operation
Knocking is a phenomenon characterized by undesirable vibration and noise and
can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and
senses engine knocking.
When knocking occurs, the vibration from the cylinder block is applied as pressure
to the piezoelectric element. When a knock occurs, the sensor produces voltage signal.
The ECM retards the ignition timing when knocking occurs. If the knocking disappears
after retarding the ignition timing, the ECM will advance the ignition timing. This
sequential control can improve engine power, torque and fuel economy.

Schematic diagrams

Harness Connector

Repair procedures
1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
terminal.
|
2. |
Remove the intake manifold.
(Refer to Engine Mechanical System - " Intake Manifold")
|
3. |
Remove the knock sensor (A) after loosening the mounting bolt.
Knock sensor mounting bolt:
18.6 - 23.5 N·m (1.9 - 2.4 kgf·m, 13.7 - 17.4 lb·ft)
|

|
4. |
Install in the reverse order of removal.
•
|
Install the component with the specified torques.
|
•
|
Note that internal damage may occur when the component
is dropped. If the component has been dropped, inspect before
installing.
|
|
|
Description and operation
Description
Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position
by using a hall element.
It is related with Crankshaft Positi ...
Specifications
Specification
HO2S [Bank 1/Sensor 1] (Linear type)
Item
Specification
Heater Resistance (Ω)
2.4 - 4.0 [20°C(68 ...
Other information:
If you lose your smart key, you will
not be able to start the engine. Tow
the vehicle, if necessary, and contact
an authorized Kia dealer.
A maximum of 2 smart keys can be
registered to a single vehicle. If
you lose a smart key, you should
immediately take the vehicle and
k ...
The system will be disarmed when:
Transmitter
- The door unlock button is pressed.
- The engine is started. (within 3
seconds)
- The ignition switch is in the "ON"
position for 30 seconds or more.
Smart key
- The door unlock button is pressed.
- The button of the front outside door
i ...