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.
Ultrasonic Sensor: Repair procedures
Removal
1.
Lift up the vehicle.
(Refer to GI group - "Lift and support points")
2.
Remove the rear bumper.
(Refer to the BD group - "Rear bumper")
3.
Pull out the sensor by opening the s ...
Interior light welcome function
When the interior light switch is in the DOOR position and all doors (and tailgate)
are locked and closed, the room lamp will come on for 30 seconds if any of the below
is performed.
Without s ...