LR3/Disco 3
Four washer jets - two windshield and two headlamp washers
Hoses
The plastic, moulded reservoir is located in the LH wheel arch, behind the liner and has a capacity of 11.08 pints (6.3
litres). It is secured to the body and front panel with bolts. A boss on the reservoir locates in a slot in the front panel and
provides additional support.
The reservoir has two recessed holes on its rear face, which provide location for the combined front pump, rear pump and
headlamp washer pumps. The pumps are push fitted into grommets, which seal the pumps in their locations. A hole in the
top of the reservoir allows for the fitment of a flexible filler tube. The front and rear wash hoses are integrated into the
harness and so follow it's routing. The headlamp washer hose comes front the bumper around the bottle to attach to the
headlamp washer pump.
A hole with a grommet in the side of the reservoir provides the location for the fluid level sensor.
The low level sensor has a float, with integral magnet. The sensor has a contact, which is normally closed when the
reservoir is full. When the fluid level reduces to approximately 1 litre, the magnetic float pivots down, which causes the
switch contact to open. This open circuit is sensed by the instrument cluster, which displays the low fluid level message
and transmits the switch status on the CAN bus.
The sensor cannot determine the precise amount of fluid in the reservoir, but can detect when the fluid level has fallen
below a certain point. When the fluid level is low, the magnetic float closes the sensor contacts, completing a circuit
through the sensor. This completed circuit is sensed by the instrument cluster, to which the sensor is directly connected.
The fluid level sensor is monitored continuously by the instrument cluster. The instrument cluster checks the fluid level
sensor when the ignition is switched on to give the driver an early warning of the low fluid level. The instrument cluster
then monitors the sensor value over a 25 second period when the ignition is on to prevent invalid messages due to fluid
'sloshing' in the reservoir.
When a low fluid level signal is transmitted to the high line instrument cluster, a 'WASHER FLUID LOW' message is
displayed in the instrument cluster's message centre. On the low line instrument cluster a low fluid level indicator is
illuminated. The first display of this message, or illumination of the indicator, is accompanied by a 'chime' sound to alert
the driver to the low fluid level.
HEADLAMP WASHERS
Item Part Number
Description
1
Headlamp washer jets
