Rain Sensor

WIPERS AND WASHERS

84-12

DESCRIPTION AND OPERATION

The sensor reacts to the influence of a magnetic field. A float, with integral magnet, is located around the tube, inside 
the reservoir. The sensor has two contacts, inside a glass tube, which are normally open. When the fluid level reduces, 
the magnetic float moves down the tube. When the magnet reaches the sensor contacts, the magnetic field closes 
the contacts. This completed circuit is sensed by the LCM which displays the low fluid level message in the instrument 
pack.

Heated Windscreen Washer Jets
Two windscreen washer jets are located in the rear trim panel on the bonnet outer surface. The washer fluid feed hose 
from the front screen pump is connected to a 'Y' piece connector located between the two jets. Two short lengths of 
hose connect the jets to the 'Y' piece. Each jet contains a non-return valve (NRV) to prevent washer fluid draining 
back to the reservoir and also to limit the amount of washer fluid which can be forced by gravity from the jet during 
cornering.

Each washer jet has two ball nozzles which can rotate in their housings to obtain the optimum fluid application onto 
the windscreen. Each washer jet contains a heater element which prevents the fluid freezing in the nozzles in very 
cold conditions. The jet heater elements are controlled by the Automatic Temperature Control (ATC) system, which 
energises the heater elements when the ambient temperature falls below a predetermined temperature.

Wiper Blade Heating
The lower, black, portion of the windscreen contains six heating elements which run from one side of the screen to 
the other. These elements are designed to heat the area of the windscreen where the wiper blades rest to prevent 
freezing in cold conditions.

The blade heating elements are controlled by the ATC system, which energises the blade heating elements when the 
ambient temperature falls below a predetermined temperature. The operation of the blade heating elements is 
activated simultaneously with the heated washer jets.

Rain Sensor

1 Transmitter diodes
2 Retaining clip (2 off)
3 Connector
4 Receiver diodes

5 Light sensor
6 Latch clip (4 off)
7 Heater element
8 Rain sensor body

The rain sensor is located at the upper edge of the windscreen, behind the interior rear view mirror. The sensor is 
mounted on an optical unit which is heat bonded to the inner surface of the windscreen during manufacture. If damage 
occurs to the optical unit or the windscreen, then a new windscreen will be required and fitment can only be performed 
by an authorised Land Rover dealer.