KIA Niro: Knock Sensor (KS)
Specification
Knock Sensor (KS) Description and operation
Description
Knocking is a phenomenon characterized by undesirable vibration and noise
that 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, and the sensor produces voltage signal to ECM. On receipt of this signal, ECM will control the ignition timing by retarding the ignition timing and then advancing the ignition timing when the knocking disappears. This sequential control can improve engine power, torque and fuel economy.
Circuit Diagram
Harness Connector
Knock Sensor (KS) Repair procedures
Removal
- Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
- Remove the intake manifold.
(Refer to Engine Mechanical System - "Intanke Manifold")
- Remove the installation bolt (A), and then remove the sensor (B) from the cylinder block.
Knock sensor mounting bolt: 18.6 - 23.5 N*m (1.9 - 2.4 kgf*m, 13.7 - 17.4 lb*ft)
Installation
Warning
- Install the component to the specified torque.
- Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
- Install in the reverse order of removal.
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Heated Oxygen Sensor (HO2S)
Specification
HO2S (Bank 1/Sensor 1) (Linear)
HO2S (Bank 1/Sensor 2) (Binary type)
Description
Heated Oxygen Sensor (HO2S), consisting of zirconium and alumina, is
installed on both upstream
and downstream of the Manifold Catalytic Con
Rail Pressure Sensor (RPS)
Specification
Rail Pressure Sensor (RPS) Description and operation
Description
Installed on the delivery pipe, the Rail Pressure Sensor (RPS) measures the
instantaneous fuel pressure
in the delivery pipe. The sensing element (Semiconduc
Accelerator Position Sensor (APS)
Specification
Accelerator Position Sensor (APS) Description and operation
Description
Installed on the accelerator pedal module, the Accelerator Position Sensor (APS)
detects the rotation
angle of the accelerator pedal. The APS is one o
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The Air Cleaner
Element
Inspection
Remove the air cleaner element.
Check that the air filter is excessively dirty.
If the air filter is excessively dirty, replace the air cleaner element.
If the air cleaner element needs to be cleaned, blow compressed air as
When the telltale lights up
Low tire pressure telltale
Low tire pressure position telltale
A: Low tire pressure
Condition(s)
One or more of the tires is significantly
under-inflated.
Operation
The corresponding position light will
light up to indicate whi
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