Rear Intermittent Wipe - Function - GF82.30-P-3001GK

MODEL 163 Applicable as of 1.9.00 

The rear intermittent wipe function is linked, among other things, to the operation of the windshield wiper system. It will therefore be described in relation to the position of the combination switch (S4):

Combination switch (S4) position: OFF 

The rear wiper  is powered from KI. 15R: ON  by operating the rear wiper/washer switch (S78)  . Switching on the wiper illuminates the LED  on the rear wiper/washer switch (S78) and immediately  causes the wiper arm to perform one complete sweep before switching to intermittent wiping.

When the vehicle is traveling at speeds of

• less than 100 km/h  the wipe interval is 10 seconds 
• of 100 km/h or more  the wipe interval is 5 seconds  .

The wiper is turned off by reactivating the wiper/washer switch.

Combination switch (S4) position: Wiper speed 1 or 2 

• The rear wiper  is activated from KI. 15R: ON  using the rear wiper/washer switch (S78)  .

  Switching on the wiper illuminates the LED  on the rear wiper/ washer switch (S78) and immediately  causes the wiper arm to perform one complete sweep before switching to intermittent wiping. The wipe interval is 5 seconds  .

  The wiper is turned off by reactivating the wiper/washer switch.

• The rear wiper  switches on automatically from KI. 15R: ON  when reverse gear is engaged. The wiper operates continuously without  delays until reverse gear is disengaged. Note: The LED  on the rear wiper/washer switch (S78) does not  illuminate when vehicle is in reverse gear.

Combination switch (S4) position: Intermittent 

When the combination switch (S4) is in the Intermittent position  we must differentiate between vehicles with and without rain sensors  (code 345a) when describing the rear wiper function.

No rain sensor (no code 345a) 

The rear intermittent wipe function is activated as follows:

• By engaging reverse gear  ; from KI. 15: ON  . The wiper arm immediately performs one complete sweep.

  Then the rear wiper switches to intermittent wiping at a frequency half that of the front windshield wiper  until the vehicle is put into neutral or another gear.

  NOTE: The LED  on the rear wiper/washer switch (S78) does not illuminate when the vehicle is in reverse gear.
• By activating the rear wiper/washer switch (S78)  ; from KI. 15R: ON  . Switching on the wiper illuminates the LED  on the rear wiper/washer switch (S78) and immediately  causes the wiper arm to perform one complete sweep. Then the rear wiper switches to intermittent wiping at a frequency half that of the front windshield wiper. The wiper is turned off by reactivating the wiper/washer switch  .

The start of each wipe cycle is synchronized with the front wiper system.

With rain sensor (with code 345a) 

The rear intermittent wipe function is activated as follows:

• By engaging reverse gear  ; from KI. 15: ON  . The wiper arm immediately performs one complete sweep. Then the rear wiper switches to intermittent wiping at a frequency equal to that of the front windshield wiper  until the vehicle is put into neutral or another gear.
  NOTE: The LED  on the rear wiper/washer switch (S78) does not  illuminate when the vehicle is in reverse gear.
• By activating the rear wiper/washer switch (S78)  ; from KI. 15:  ON. Switching on the wiper illuminates the LED  on the rear wiper/washer switch (S78) and immediately causes the wiper arm to perform one complete sweep before switching to intermittent wiping. The frequency is linked to the frequency of the front windshield wiper and is thus controlled by the rain (B38)sensor  .

  The actual frequency is also a factor of the vehicle's speed of travel (see chart below).

  The wiper is turned off by reactivating the wiper/washer switch.

The start of each wipe cycle is synchronized with the front wiper system.

	Vehicle speed Under 50 km/h	Vehicle speed 50 to 100 km/h	Vehicle speed 100 km/h and higher
Frequency of Rear wiper	One twelfth  of front wiper frequency	One tenth  of front wiper frequency	One sixth  of front wiper frequency

Networking 

Rain sensor (B38) and reverse signals are fed to the All Activity Module (AAM) (N10)  via the engine compartment CAN. 

The settings of the rear wiper/washer switch (S78)  are read directly by the All Activity Module (AAM) (N10)  .

The tailgate wiper motor unit (M6/4)  is controlled directly by the All Activity Module (AAM, N10)  .

The tailgate wiper motor unit (M6/4)  comprises a relay  and a cam-operated switch  in addition to the actual motor.

	Rear Wiper/Washer Switch - Location/Task/ Design/Function		GF82.30-P-4105GH
	All Activity Module - Location/Task/Design/ Function		GF54.21-P-4100GK
	Tailgate Wiper Motor - Location/Task/Design/ Function		GF82.30-P-4105GH
	Rain Sensor - Location/Task/Design/Function	Vehicles with code 345a (rain sensor) only	GF82.30-P-4103GH