Kia Sportage: Rain Sensor: Description and Operation
Third generation SL (2010–2016) / Kia Sportage SL Service & Repair Manual / Body Electrical System / Windshield Wiper/Washer / Rain Sensor: Description and Operation
| Description |
The Rain sensing windshield wiper system is a wiper system
that, in addition to providing normal wiper functions off, mist, manual
low speed, manual high speed, and wash, provides automatic control of
automatic intermittent automatic low, and automatic high speeds.
When the ignition key is in the ON position, the rain sensor (A) will be activated.
| System Function |
Basic Principle
Emitted Beam from luminosity diode is reflected entirely against the windshield exterior, and then turn into photo diode.
If there is water on the windshield exterior, beam separates
optically, and the degree of remained beam is measured in the photo
diode.
What there is water in the windshield, it means beam is not
reflected all, so the degree of lost beam indicates the degree of glass
surface wet.
Rain sensor consist of two luminosity diode, two photo diode, optic fiber and coupling pad. |
Operation Control
Wiper ECU transmits the signal as a rain sensor, and then the
rain sensor perceives the rainwater to transmit to the wiping order
wiper ECU, wiper ECU controls the wiper motor according to the signal.
Contact Influence
The rain sensor can malfunction due to following condition
| • |
Contamination of the measurement surface. |
| • |
Air bubbles between the windshield and the coupling pad contact surface. |
| • |
The movement of coupling pad by vibration. |
| • |
Damaged wiper blade. |
Operation Condition
In case that engine starts under wiper switch AUTO, rain
sensor activates after once wiper operation to inform the driver that
the system is under AUTO.
In case that the rain sensor doesn''t work or malfunction, it is needed manual wiper switch operation by the driver. |
Rain Sensor: Schematic Diagrams
Circuit Diagram
...
Rain Sensor: Repair procedures
Inspection
Rain Sensing Wiper
1.
In IGN2 ON state, if auto switch input (LIN communication) is
ON then both wiper low relay and wiper high relay outputs are
controlled by the rain sensor inpu ...
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