Wiping when reversing, function - GF82.30-P-3002PS

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MODELS 203.2 up to 4/23/04

Fig 1: Wiping When Reversing Function Diagram

Shown for rain sensor (B38) up to 31.5.03

Function:

If the vehicle is shifted into reverse gear while the windshield wiper is switched on, then the rear-end door wiper motor (M6/4) is also switched on. The function rear window wiping while reversing depends on the switch-on state of the windshield wiper system. Therefore the following functions are described depending on the switch position of the combination switch (S4).

Function prerequisites:

Circuit 15R ON
Windshield wiper in operation
Backup signal from the electronic selector lever module control unit (N15/5) (on transmission 722) or from the backup lamp switch (S16/2) (on transmission 716)

Operating procedure

The backup signal is transmitted from the electronic selector lever module control unit (N15/5) over the Control Area Network bus class B (interior) (CAN-B) or from the backup lamp switch (S16/2) via a separate line to the rear SAM control unit with fuse and relay module (N10/2). The rear SAM control unit with fuse and relay module (N10/2) actuates the rear-end door wiper motor (M6/4).

Function sequence with combination switch (S4) in position "I" intermittent wiping

Without code (345a) rain sensor

The first wiping cycle is actuated immediately. Then the rear window wiper is operated in the intermittent mode. The intermittent pauses have a duration of 5 seconds.

With rain sensor with code (345a)

The first wiping cycle is actuated immediately. Then the rear window wiper is operated in the intermittent mode. The intermittent pauses are determined by the rain sensor (B38) or by the rain/light sensor (B38/2).

Combination switch (S4) in position "II" or "III" for slow or fast wiping

The first wiping cycle is actuated immediately. Then the rear window wiper is set to continuous wiping.

The function rear window wiping when reversing always has priority over the function rear window intermittent wiping.

Switching off rear wiper system

The function rear window wiping when reversing is switched off when the backup signal is no longer recognized or the windshield wiper system is switched off.

Combination switch, location/task/design/ function		GF82.30-P-2100PP
Rear-end door motor, location/task		GF82.30-P-4003PP
Rear window wiper switch, location/task/design/ function		GF82.30-P-4102PS
Rain sensor, location/task/design/function	On vehicles with code (345a) rain sensor up to 31.5.03	GF82.30-P-4103S
Rain/light sensor location/task/function	On vehicles with code 345a rain sensor as of 6/1/03	GF54.21-P-4123PQ
Rear SAM control unit with fuse and relay module, location / task / design / function		GF54.21-P-4115PP
Electronic ignition switch control unit, location/ task/design/function		GF80.57-P-4102PP
Steering column module location/task	On vehicles as of 1.7.02	GF54.21-P-4125Q
Overhead control panel control unit, location/ task/design		GF82.20-P-4110A