PRE-RELEASE
Washer system 4D
| Washer system 4D |
The washer system comprises two washer pumps, one for the windscreen and one for the headlamps, and a switch on the right-hand side of the steering wheel. The washers are started by moving the stalk switch towards the steering wheel (spring-loaded).
The centrifugal washer pumps supply washer fluid to the windscreen and headlamp washers.
The washer pumps pump washer fluid in hoses to the jets, which are directed on selected areas of the windscreen and headlamps.
There are check valves in the hoses to prevent them from emptying between times the washers are active. The headlamp washer jets are located on the bumper.
When the washers are activated, DICE starts the windscreen wipers. The wipers continue to wipe for a further 3-5 strokes after the washers have stopped, depending on the length of time the washers were in action.
After eight seconds, the wipers perform an additional stroke if the speed of the car is less than 20 kph. This function is programmable (YES/NO) with the diagnostic tool.
On cars where one is fitted, the rain sensor will activate the windscreen wipers once the washers have stopped.
The headlamp washers are started by activating the windscreen washer switch (61) for longer than 0.5 seconds. The ignition must be turned to ON, the lights must be turned on and the vehicle speed must be below 200 km/h before the washers can be activated. The washer jets are active for 0.8 seconds and then stop for 1.2 seconds, after which there will be another short jet (0.8 s).
In order to activate the headlamp washers again, a period of more than 120 seconds must have passed since the washer pump was last activated and the windscreen washers must have been used at least 5 times. If the ignition is turned off and then on again, the headlamp washer pump will operate the next time the windscreen washer switch (61) is activated.
If the washer fluid level is below 1 litre, SID will send a bus message "WASHER FLUID LEVEL LOW" to DICE to prevent the washer pump from being started when the washer fluid level is low.
When the switch (61) is turned on, +54 is supplied from pin 5 on the switch via fuse 37 to the windscreen washer pump (63b) and to DICE pin 68. Dice (628) grounds pin 27 for about one second to trigger the relay (667). The washer fluid pump (668) is powered on pin 1.
After about one second, DICE (628) will ground the headlamp washer relay (667) once again and current will be applied to the washer fluid pump (668) pin 1.
SID monitors the level of washer fluid in the reservoir. If the level is low, the control module emits an audible signal and the words WASHER FLUID LEVEL LOW are displayed on the display.
