Rain sensing

What happens to the resistance of the copper grid when it is dry?

• It remains constant.

• It fluctuates randomly.

• It becomes very high.

• It becomes very low.

How does modern rain sensor technology detect raindrops?

• By monitoring the speed of the wiper motor.

• By measuring the temperature of the windshield.

• By detecting changes in infrared light reflection.

• By using a copper grid to detect moisture.

Why is infrared light used in modern rain sensors?

• It is cheaper than other light sources.

• It works well in both daylight and nighttime.

• It can penetrate through water droplets.

• It is unaffected by weather conditions.

What is the purpose of multiple photodiodes in modern rain sensors?

• To cover a larger detection area.

• To improve the durability of the sensor.

• To reduce the cost of manufacturing.

• To increase the speed of the wipers.

What should be done when diagnosing a wiper fault caused by erratic operation?

• Replace the rain sensor module.

• Clean the window to remove debris or insects.

• Reprogram the body control module.

• Check the LINBUS connection.