sensor SSANGYONG KORANDO 2012 Service Manual

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2. RAIN SENSING SYSTEM
In the rain sensing wiper operation system, the rain sensing unit only sends the information about the
amount of rain drops to the BCM, and it does not operate the wiper directly. The wiper and washer are
controlled by the BCM according to the driver's choice.
Rain sensing unitMultifunction wiper switch
AUTO and sensitivity control
This sensor emits infrared rays through LED
and then detects the amount of rain drops
by receiving the rays reflected off the
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 the sensitivity for
the amount of rains on the windshield and
transmit the wiping request signal
accordingly.
Rain sensor emitter lens
Auto light sensor sensing
portion

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BCM ▶
The rain sensor detects the amount of rain drops and sends the operating request signal to the BCM,
which drives the wiper directly. At this moment, the BCM also sends the information on whether the
wiper is in operation mode or whether the multifunction wiper switch is in AUTO position to the rain
sensor.
BCM Underhood Fuse Box

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Rain sensor unit
3. SYSTEM LAYOUT (INCLUDING RAIN SENSOR)
Wiper
Front wiper
Rear wiper
Rear washer hose and nozzle
For vehicles with
rear spoilerFor vehicles without rear
spoiler
WIPER AND WASHER SWITCH

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AUTO operation and sensitivity control
5) Rain Sensor Coupled Wiper Control Function
AUTO: Wiper operates automatically by rain sensor
FAST <----> Auto delay/auto speed control
A position that can control sensitivity against rains on the
windshield and transmits wiping demand signal accordingly.

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System layout ▶
(1) Rain sensor coupled wiper operation (LIN)

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If the intermittent/automatic wiper switch is in "ON" position, the wiper motor does not operate even
when turning the ignition switch to ON from OFF position.
When the INT/AUTO wiper switch is turned on from off with the ignition switch ON, the wiper is
operated at low speed for the 1st cycle regardless of the rain sensor signals. After that, if the
INT/AUTO wiper switch is turned on from off, the wiper cycles one time at low speed only when the
rain sensor detects the presence of rain. 1.
2.
(2) Power-up reminder wiper

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When the washer switch signal is received during intermittent operation coupled with rain sensor
with IGN ON and intermittent/automatic
washer switch operation, the wipers operate in washer coupled mode regardless of the
communication with the rain sensor. However, if the washer switch
signal is received the washer relay is activated and wiper relay remains activated,
when the data coupled with rain sensor indicates continuous wiper operation.
Even though the wiping system is in washer coupled wiper mode, the operating data are sent to
rain sensor. 1.
2.
(3) Washer coupled wiper operation during rain sensor coupled operation

08-24
When the wiping speed control switch is turned to "FAST" with IGN2 ON, intermittent/automatic wiper
switch in "ON" position and wiper motor stop (parking position), the wiper motor operates one cycle a
t
low speed.
(only when the rain sensor detects raindrops)
If the wiping speed control switch is changed more than 2 stages within 2 seconds, the wiper motor
operates only one cycle. 1.
*
(4) Sensitivity control (instant wiping)

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When the parking terminal is shorted to power with IGN2 ON and intermittent wiper switch in "ON"
position, the wiper system sends the signal for current wiping status for 2 seconds. After that, it
sends the current signal for parking status continuously.
* The wiper motor is operated only when there is a request from the rain sensor. 2.
The wiper system sends continuously the signal for current status when the wiper parking terminal
is shorted to ground with IGN2 ON and intermittent wiper switch in "ON" position.
* The wiper motor is operated only when there is a request from the rain sensor. 1.
(5) For abnormal wiper parking signal

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When the wiper speed control switch is turned to step 3 from step 4 the wiper motor cycles one time
at low speed, provided that the BCM receives a communication error signal from the rain sensor uni
t
with IGN ON and the INT/AUTO switch ON. 2.
When the wiper speed control switch is turned to step 2 from step 3 the wiper motor cycles one
time at low speed, provided that the BCM receives a faulty sensor signal from the rain sensor unit
with IGN ON and the INT/AUTO switch ON. 1.
(6) For faulty rain sensor