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Brief component description: Notes

The rain/light sensor is bonded to the inside of the windscreen in the wiper range of the windscreen wiper.

Fig 1: Identifying Rain/Light Sensor And Photosensor
G10004197Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Photosensor to pick up the ambient brightness
2 Optical element of the rain sensor
3 Photosensor to pick up the frontal light

This installation location ensures that the sensor surface remains free of dirt and ice. To prevent the sensor surface from fogging over, the sensor is heated.

The rain/light sensor is supplied with voltage by the junction box via terminal 30g. The rain/light sensor is connected via the LIN bus with the junction box electronics.

Fig 2: RLS Rain/Light Sensor - Circuit Diagram
G10004198Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Engine control unit
2 Windscreen wiper motor
3 Pump for the headlight cleaning system
4 Windscreen washer pump
5 RLS rain/light sensor
6 JBE junction box electronics
7 Rear wiper motor
8 SZL steering column switch cluster