Kia Carens: Windshield Wiper/Washer / Rain Sensor Description and operation
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 will be activated.

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.
Rainsensor consist of two luminosity diode, two photo diode, optic fiber
and coupling pad.
|
Operation Control
Wiper ECU transmits the signal as a rainsesor, and then the rainsensor perceives
the rainwater to transmit to the wiping order wiper ECU, wiper ECU controls
the wiper motor according to the signal.
Contact Influence
The rainsensor 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.
|
Operation Condition
In case that engine starts under wiper switch AUTO, rainsensor activates after
once wiper operation to inform the driver that the system is under AUTO.
In case that the rainsensor doesn't work or malfunction, it is needed
manual wiper switch operation by the driver.
|
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 c ...
Other information:
Troubleshooting
If ISG function is not operated, check the related DTC codes. (Refer to DTC
guide.)
If the ISG function is not operated in spite of no DTC, inspect the ISG system
as below.
The GDS tool shows the current data about the ISG function for inspection.
...
1. Pull the cargo security screen towards the rear of the vehicle by the handle
(1).
2. Insert the guide pin into the guide (2).
✽ NOTICE
Pull out the cargo security screen with the handle in the center to prevent
the guide pin from falling out of the guide.
When the cargo security screen is no ...