Wiper/Washers For The Windshield/Rear Window/ Headlights
Rear window wiper and washer are only available on C30 and V50.
The right-hand control stalk (3/134) is moved downwards through three positions to operate the windshield wipers. The steering wheel module (SWM) (3/254) transmits information via the control area network (CAN) to the central electronic module (CEM) (4/56) about the selected position. The central electronic module (CEM) transmits the information on to the wiper motor module (WMM) (6/1) via serial communication.
For intermittent wiping, the process is the same as for low speed, but the time between each stroke is set using the ring on the control stalk to one of eight positions between 1 and 27 seconds. The wiper motor module (WMM) controls this once it has received information about intermittent wiping from the steering wheel module (SWM). The information is transmitted from the steering wheel module (SWM) via the central electronic module (CEM) on the controller area network (CAN).
The Wiper motor module (WMM) has an integrated function to protect the wiper motor from overheating and unnecessary wear.
The load on the motor is monitored and in the event of too great a load or high motor temperature, the wiper speed can be reduced gradually or temporarily switched off to protect the motor.
The wiper speed is reset automatically after the load or temperature has reached a safe level.
The windshield and headlamps are washed when the right-hand control stalk is moved towards the steering wheel. The steering wheel module (SWM) transmits information to the central electronic module (CEM) via the Control area network (CAN) to activate washing. The central electronic module (CEM) activates the relay (2/182) for power supply to the pump motor (6/104) for the headlamps. When washing the windshield the central electronic module (CEM) activates the relay (2/92) for power supply to the pump motor (6/2).
The central electronic module (CEM) receives a signal from the level sensor in the windshield washer reservoir so that it can check the windshield washer reservoir level. The switch in the level sensor closes if the level falls below 0.7 liters. The central electronic module (CEM) sends the signal to Driver information module (DIM) (5/1) via the controller area network (CAN). The driver information module (DIM) displays a text message indicating that the windshield washer fluid needs to be topped up. The symbol for low windshield washer reservoir level lights.
The tailgate wiper can be programmed so that it is activated if the windshield wipers are on and back-up (reverse) gear is selected.
Rear windshield cleaning is activated when the right-hand control stalk is pushed away from the steering wheel. The steering wheel module (SWM) transmits information to the central electronic module (CEM) via the Control area network (CAN) to activate rear windshield washing. The central electronic module (CEM) activates relay (2/93) to power the pump motor (6/2). The central electronic module (CEM) activates the tailgate wiper at the same time.
The wipers only operate at low speed if there is a fault in the control area network (CAN).
There is no Limp Home function for the rear windshield washer and wiper.