Hyundai Santa Fe: 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 diagnostic
tool.
Specification : Refer to "DTC Diagnostic Guide"
Removal
•
DON’T remove the camshaft position sensor during engine running
or right after engine stops, or a scald by the flowed out engine
oil may occur...
Other information:
Opening the liftgate
To open the liftgate:
1. Make sure you have the smart key in your possession.
2. Press either the liftgate open/close button on the vehicle or press and hold
the liftgate open button on the smart key for more than one second. The hazard warning
lights will blink two times and the liftgate will open...
This system helps to protect your vehicle and valuables. The horn will sound
and the hazard warning lights will blink continuously if any of the following occur:
- A door is opened without using the smart key.
- The liftgate is opened without using the smart key...
Categories

1. Inside door handle
2. Power window switches
3. Power window lock button/Electronic child safety lock button
4. Side view mirror folding button
5. Side view mirror control switch
6. Central door lock switch
7. Instrument panel illumination control switch
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