2012 SSANGYONG RODIUS wiper

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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 sensorAuto 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
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4700900095004702c80068007c007b007602c9004700970096>sition).
The wiper relay (LO) is turned on and the wiper motor runs one cycle when changing the
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90009b009000960095009a0047004f009e008f00900093008c> the ignition key is in “ON”
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7602c9004700970096009a0090009b00900096009500470088>gain 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
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a000470090009a004700900095004702c80076007502c90047>position, the wiper switch is in
“AUTO” position, and the wiper motor is in “Parked” position). However, the wiper motor can be
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9000950047006b008c009b008c008a009b008c008b02c90047>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. *

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The wiper system continuously outputs the parking signal of current sensitivity when the
parking terminal is grounded (while the ignition key is in “ON” position and the wiper switch is
in “AUTO” position). 1)
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8c0098009c00900099008c009a0055>
When the parking terminal is fixed to IGN (HIGH), the wiper system outputs the operating
signal of current sensitivity for 2 seconds, then continuously outputs the parking signal of
current sensitivity. 2)
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▶ Wiper operation when the wiper parking terminal is grounded

08-10
The wiper relay (LO) is turned on and the wiper motor runs one cycle when the wiper sensitivity is
changed to 2 from 3 during receiving the malfunction signal (1) from the rain sensor. However,
the wiper motor can be operated only when the rain sensor detects the "Rain Detected" signal. 1)
If the volume sensitivity is changed more than 2 stages within 2 seconds, the wiper motor
runs only one cycle. ▶ Defective rain sensor