Description
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
...
See also:
Description and Operation
Description
Burglar Alarm System
The burglar alarm system is armed automatically after the doors, hood,
and trunk lid are closed and locked with keyless transmitter.
The system is s ...
CVVT Oil Control Valve (OCV). Specifications
Specification
Item
Specification
Coil Resistance (Ω)
6.9 ~ 7.9 [20°C(68°F)]
...
Resetting the sunroof
Whenever the vehicle battery is disconnected or discharged, you must reset your
sunroof system as follows:
1. Turn the ignition switch to the ON position. 2. Close the sunroof. 3.
Release the sun ...