Kia Carnival (2007 year). Manual — part 359

Rain Sensor

2007 > 2.7L V6 GASOLINE >

DESCRIPTION

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.

SYSTEM FUNCTION

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 seperates 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 rain sensor can malfunction due to the following conditions :

a. Contamination of the measurement surface.

b. Air bubbles between the windshield and the coupling pad contact surface.

c. The movement of coupling pad by vibration.

d. Damaged wiper blade.

AUTO OPERATION

1. Operation Condition

Operation mode

Operation condition

Direct mode

Switch AUTO is basic operation condition that rain sensor perceives dry
windshield. From this condition, the rain sensor decides the wiper operation
mode depend on the quantity and time of measured rainwater

Intermittent mode

Operation pauses between 0.5~5 seconds, then the wipers switch to
intermittent mode

Low speed

Operate continuously at low speed

High speed

Operate continuously at high speed

2. Safety Function

a. When there is an ice in the sensing field, the rain sensor cannot recognize the correct working condition.

Do not operate the rain sensing wipers unless the windshield is completely clear of ice and snow.

b. Glass damage : rain sensor cannot perceive the damaged windshield within the sensing field.

c. The rain senson will not operate properly if detached from the windsheld.

d. If the wiper ECU does not transmit any effective data in 5 seconds, the rain sensor turns off LED.

e. If the intermittent wiper signal is interrupted for >2 sec, the wipers are moved to the parking position.

f. If a rain sensor signal communication error lasts for > 5sec, the wipers are moved into the parking position.

g. If the rain sensor transmits an error to the wiper ECU, the wiper ECU stops the AUTO function after 4.5

seconds.

2007 > 2.7L V6 GASOLINE >

REMOVAL

The rain sensor may not operate proprly if contaminated. Protect the rain sensor surface by not removing the
cover until installation time. The coupling pad on the rain sensor surface has adhesive strength. Take care when
installing the sensor. If the sensor is separated from the windshield by force, the sensor or windshield may be
damaged. Take care when removing the sensor.

1. Remove the sensor cover. When removing it, make sure take care to prevent damage. To remove it, press back

the locking hook using the cover hole using an appropriate tool.

2. When removing rain sensor from the bracket, open the spring clip using the (-)driver, and then remove.

3. Disconnect the wiring harness connector from the sensor.

4. Rain sensor is fitted with 2 spring slides by clip type on the front glass, it can be replaced easily. When replacing

the front glass, take away the rain sensor from the existing glass.
After then attach it to new one again.

INSTALLATION

a. In case of the windshield with reflection layer which reflects the infrared rays in sensing field, remove the

reflection layer from the rain sensor mounting position prior to installation.

b. Bracket and spring slide need for installing the rainsensor, it is covered by sensor cover.

1. Install the rain sensor bracket to the windshield glass using the tape