Hyundai Creta: Engine Control System / Knock Sensor (KS)
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. At this time, this sensor transfers the voltage
signal higher than the specified value to the ECM and the ECM retards the ignition
timing. 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.
Specifications
Item
|
Specification
|
Capacitance (pF)
|
950 ~ 1,350
|
Resistance(MΩ)
|
4.87
|
Schematic diagrams
(M/T)
(A/T)
Repair procedures
| 1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
terminal.
|
| 2. |
Disconnect the knock sensor connector (A).
|
| 3. |
Remove the mounting bolt (A), and then remove the sensor from the cylinder
block.
|
| • |
Install the component with the specified torques.
|
| • |
Note that internal damage may occur when the component is dropped.
In this case, use it after inspecting.
|
|
| 1. |
Install in the reverse order of removal.
|
Knock sensor mounting bolt :
18.6 ~ 24.5 N.m (1.9 ~ 2.5 kgf.m, 13.7 ~ 18.1 lb-ft)
|
|
Description and operation
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