SsangYong Rodius (2013 year). Manual - part 129

08-3

8610-11

The rain sensing wiper unit in this vehicle doesn’t control the wiper directly.

The rain sensing unit detects the amount of rain drops and sends the operating signal to STICS, and 

STICS drives the wiper directly.

1. SYSTEM LAYOUT AND OVERVIEW

Rain sensing unit

Multifunction wiper switch:

AUTO and sensitivity control

A sensor that emits infrared rays through LED 
and then detects the amount of rain drops by 
receiving reflected rays against sensing 
section(rain sensor mounting section on the 
windshield)with photodiode.

 AUTO
: Wiper operates automatically by rain sensor
  FAST <-------> SLOW
: Auto delay/Auto speed control. A position 
  that can control sensitivity against rains on 
  the windshield and transmits wiping demand  
  signal accordingly.

Emitter lens

The LED which is located 

at bottom emits the 

infrared rays and the lens 

guides the infrared rays to 

target point.

Enlarged auto light 

sensor section

Auto light sensor

Auto light sensor (Horizon)

Auto light sensor (Vertical)

08-4

ICM box

The wiper related relays are installed in 
ICM box.

Relay5

(Wiper INT-Low)

Relay6

(Wiper High)

STICS

The rain sensing unit detects the amount of rain drops and sends the 
operating signal to STICS, and STICS drives the wiper directly.
At this moment, STICS determines the wiper operation mode 
(washer, MIST, AUTO), then sends the information to the rain 
sensor.

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8610-11

2. RAIN SENSOR OPERATION

The rain sensor is installed on the specific heat treated windshield that has minimum 13% of 

transmittance rate with specified intensity of radiation. It is installed on the glass with a adhesive of 

Sorepa. 

It communicates with STICS and makes the wipers to operate automatically under the rain sensing 

mode (multifunction switch wiper: AUTO mode). 

The emitting section of the rain sensor unit emits infrared rays against the windshield and then detects 

the amount of rain drops by receiving reflected rays with photodiode.

The sensing section on the windshield is located just above the center point between LED and 

photodiode.

Components and functions of the rain sensor unit

Unit latch

Rain 

sensor unit

PCB assembly and

emitter lens

Emitter lens

The LED emits the infrared

rays is located at bottom and

the lens guides the infrared

rays to target point.

Receiver lens

The receiver lens guides the

reflected infrared rays from

windshield to photodiode.

Housing and

receiver lens

Housing and PCB

Rear

Front

Rain sensor unit (including cover)

08-6

1) Rain Sensor Coupled Wiper

▶ System layout

This vehicle has a different wiper control logic compared to other models. As shown in the system 

diagram, the rain sensor unit does not control wiper directly. The rain sensor unit sends infrared rays 

signal through LED and then receives it with photo diode and then sends the returned signal to STICS 

and the STICS controls the wipers directly.

For more details, refer to rain sensing wiper section in this manual.