2013 SSANGYONG TURISMO Service Manual

07-6
1. SYSTEM LAYOUT
▶Components

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2. CIRCUIT DIAGRAM

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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 unitMultifunction 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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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.

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▶ Rain sensing operation point
The wiper relay is turned on and the wiper motor runs one cycle when the ignition key is turned to
“ON” position (while the wiper switch is in “AUTO” position).
The wiper relay (LO) is turned on and the wiper motor runs one cycle when changing the wiper
switch to “AUTO” position from any other positions (while the ignition key is in “ON”
position). When the wiper switch is turned to “AUTO” position again from other positions,
the system drives the wiper relay (LO) to run the wiper motor one cycle only when the rain sensor
detects the “Rain Detected” signal. 1)
2)

08-8
The wiper relay is turned on and the wiper motor runs one cycle when the volume sensitivity is
increased (ex: from 0 to 1) (while the ignition key is in “ON” position, the wiper switch is in
“AUTO” position, and the wiper motor is in “Parked” position). However, the wiper motor can
be operated only when the rain sensor detects the “Rain Detected” signal.
▶ Rain sensing sensitivity control
If the volume sensitivity is changed more than 2 stages within 2 seconds, the wiper motor runs only
one cycle. *