Windshield intermittent wiping, function - GF82.30-P-3003S
Models 215, 220
Operational sequence:
- The intermittent wiping function is switched on by turning the combination switch (S4) to position 1.
- The position of the combination switch (S4) is read in by the steering column module (N80) and sent to the interior compartment CAN as a message
- The left front SAM control module (N10/6) receives this message and initiates one wipe cycle (if the wiper was already moving, this wipe cycle is first brought to an end)
- After one wipe cycle, the wiper motor (M6/1) is stopped
- The intermittent pause is started.
- At the end of the pause, the next wipe cycle is executed.
Control of wiper motor
The left front SAM control module (N10/6) controls the wiper motor (M6/1) by means of the wiper stage 1 and 2 relay (K40/6kG) and wiper On and Off relay (K40/6kH) so that the wiper wipes at speed stage 1.
Interruption of intermittent pause
If another wiper function is requested during an intermittent pause, this function is executed without taking the intermittent pause into consideration. After completion of this function, the intermittent pause is started again.
Control of the intermittent pause
The intermittent pause is dependent on the amount of moisture present on the windshield. The left front SAM control module (N10/6) analyses for this purpose the data from the rain/light sensor (B38/2). The exchange of data between the left front SAM control module (N10/6) and the rain/light sensor (B38/2) takes place via the interior compartment CAN and, because the rain/light sensor (B38/2) is not connected directly to the interior compartment CAN, via the overhead control panel control module (N70) as an interface.
In the event of a failure of the rain/light sensor (B38/2) the intermittent time is set to approx. 5 s.
As of 1.6.00 there is a safety cutout when the front door is open.
System functions
Function prerequisites:
- Circuit 15R ON
Windshield wipers
Switch position I = intermittent = pause duration dependent on quantity of moisture; can be regulated upward to continuous wiping stage 2.
Switch position II = stage 1 = continuous wiping 40 cycles/min
Switch position III = stage 2 = continuous wiping 60 cycles/min
A two-stage standard wiper control is used. This is actuated directly from the left SAM control module (N10/6).
Data are only transferred between the left SAM control module (N10/6) and the overhead control panel control module (N70) when there is a change to the data, or when one of the two control modules is initialized. The functions are interrupted with "Circuit 15R OFF".
Intermittent wipe (valid as of 1.9.02)
Continuous wiper control by the rain/light sensor (B38/2)
The top priority for switching on the wiper is always assigned to the combination switch (S4). Information such as the vehicle speed, the position of the wiper switch, the ambient light conditions as well as the outside temperature are received by the overhead control panel control module (N70) and processed in the algorithm implemented. The wiper system is actuated via the interior compartment CAN by means of the left SAM control module (N10/6).
The wiper is controlled depending on the particular quantity and frequency of moisture by:
- Individual wipe cycles
- Continuous wipe
- Continuous wiping with the selection of the required wiper speed
The intermittent time is determined by the rain/light sensor (B38/2) (up to stage 2 continuous wiping). If communication with the overhead control panel control module (N70) fails at switch position I the intermittent wiping function is activated. If intermittent wiping is transmitted from position 0, the wipe cycle takes place immediately. After interrupting intermittent wiping by a wiper function, the intermittent pause elapses.
Intermittent times (emergency mode) :
- 1st intermittent time T/1 = 5 s ± 1 s
- 2nd intermittent time T/2 = 1.5 s (T/1 with automatic speed reduction)
The rain/light sensor (B38/2) is activated by switching on the intermittent wiper setting and thus the CAN message generated by the left SAM control module (N10/6) via the overhead control panel control module (N70). The left SAM control module (N10/6) receives the request for intermittent wiping via the interior compartment CAN.
Switch positions (valid as of 1.9.02)
With the combination switch (S4) position: intermittent (rain sensor position) the requests for the wiper take place via the overhead control panel control module (N70) from the rain/light sensor (B38/2).
If using the combination switch (S4) another wiper setting is selected, the request comes directly from the left SAM control module (N10/6) to the wiper.
The combination switch (S4) information as well as the requests from the overhead control panel control module (N70) are supplied by means of the interior compartment CAN.
| Safety switch-off (WS), function | as of 1.6.00 | GF82.30-P-3005SN |