Kia Carens: 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. 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.

Inspection
1.
Check the signal waveform of the CMPS and CKPS using the GDS.
Specification: Refer to “Wave Form”
...
Specification
Item
Specification
Capacitance (pF)
950 ~ 1,350
Resistance (MΩ)
4.87
...
Other information:
1. Turn off the engine.
2. Open the tailgate.
3. Remove the service cover using a flat-blade screwdriver.
Tail light/Back-up light (Bulb type)
4. Remove the socket from the assembly by turning the socket counterclockwise
until the tabs on the socket align with the slots on the assembly.
5. Remove ...
Components
1. BJ
assembly
2. BJ circlip
3. BJ boot band
4. BJ boot
5. Dynamic
damper band
6. Dynamic damper
7. Shaft
8. TJ boot band
9. TJ
boot
10. Spider assembly
11. Snap ring
12. TJ housing
13. TJ ...