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:
Headlamp welcome function
When the headlight switch is in the ON or AUTO position and all doors (and tailgate)
are closed and locked, if you press the door unlock button on the transmitter (or
smart key), the headlights wi ...
Front Impact Sensor (FIS). Description and Operation
Description
The front impact sensor (FIS) is installed in the front side member. They
are remote sensors that detect acceleration due to a collision at its mounting
location. The primary pur ...
Engine compartment
Gasoline 1.6 GDI
1. Engine coolant reservoir 2. Engine oil filler cap 3. Brake/clutch* fluid
reservoir 4. Positive battery terminal 5. Negative battery terminal 6. Fuse
box 7. Air cleaner 8. Ra ...