MERCEDES-BENZ ML430 1997 Complete Repair Manual

MODEL 163 as of 1.12.99
The entrance and exit lamps in the front and rear doors (E17/3, E17/4, E17/5 and E17/6) are actuated by
the extended activity module (EAM) when the corresponding door is opened and when the dome lamp is
switched on.
The switch-on time for the entrance/exit lamps corresponds to that of the interior lighting.
Fig. 18: Identifying Actuating Entrance/Exit Lamps

ACTUATING REAR DOME LAMP, FUNCTION - GF82.20-P-4005GH
MODEL 163
A slide switch with three positions is integrated into the rear dome lamp (E15/3) . The lamp is connected to
circuit 30. Three modes can be selected with the slide switch:
"Automatic" (1). The second lamp terminal is connected to the rotary tumbler/tailgate microscwitch
(S88/1) which completes the circuit to circuit 31 when the tailgate is opened.
Continuous "on" (2). The second terminal in the lamp is connected to circuit 31.
Continuous "off" (3).
Switching interior lighting
on/off manually, function GF82.20-P-2009GH
Switching interior lighting
on/off automatically,
function GF82.20-P-2010GH
Extended activity module,
location/purpose GF54.21-P-4106GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 36 © 2006 Mitchell Repair Information Company, LLC.

Fig. 19: Identifying Rear Dome Lamp
ACTUATING FOOTWELL LAMPS, FUNCTION - GF82.20-P-4008GH
MODEL 163 as of 1.12.99
The front left and right footwell lamps (E17/16 and E17/15) dome lamp (with shut-off delay and reading
lamp) (E15/2) automatically.
The switch-on time of the footwell lamps depends on the dome lamp.
are actuated each time the front is switched on manually or
Fig. 20: Identifying Actuating Footwell Lamp

Rotary tumbler
microswitches GF82.20-P-4105GH
Switching interior
lighting on/off manually, GF82.20-P-2009GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 37 © 2006 Mitchell Repair Information Company, LLC.

ROTARY TUMBLER MICROSWITCHES, LOCATION - GF82.20-P-4105-01GH
The rotary tumbler microswitch is installed in the rotary tumbler.
Left rear rotary tumbler is shown
Fig. 21: Identifying Rotary Tumbler Microswitches, Location

ROTARY TUMBLER MICROSWITCHES, FUNCTION - GF82.20-P-4105-02GH
The contact in the left rear rotary tumbler microswitch (S87/2), the right rear rotary tumbler microswitch
(S87/3), the right front door rotary tumbler microswitch (S87/6), the left front door rotary tumbler microswitch
(S87/7) or the rear door rotary tumbler microswitch (S88/1) is closed when the respective door is closed (rotary
tumbler snapped in place). The status of the switch contact is read by the All Activity Module (AAM)(N10).
The central locking microswitches, which are also installed in the rotary tumbler, indicate whether a door is
locked or unlocked. These microswitches are no longer used as of 31.08.02.
ROTARY TUMBLER MICROSWITCHES, LOCATION/TASK/DESIGN/FUNCTION - GF82.20-P-4105GH
MODEL 163
function
Switching interior
lighting on/off
automatically, function GF82.20-P-2010GH
Rotary tumbler
microswitches, location GF82.20-P-4105-01GH
Rotary tumbler
microswitches, taskSignal whether vehicle
doors are closed/open to

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 38 © 2006 Mitchell Repair Information Company, LLC.

WIPER SYSTEM (WS), FUNCTION - GF82.30-P-0003GH
MODEL 163
Function
The windshield wiper system is operated with the combination switch (S4) .
The following functions can be selected with the switch:
Actuating switch upward: Wiping windshield at slow (stage 1) or fast (stage 2) speed.
Actuating switch downward: Intermittent windshield wiping (on vehicles with rain sensor (code 345a)
this function is actuated by the rain sensor (B38).
Actuating switch indirection of steering column: Washing windshield
The wiper system of the rear window is operated with the wipe/wash rear window switch (S78) . The
following functions can be selected:
Intermittent rear window wiping (on vehicles with rain sensor (code 345a) this function is actuated by
the rain sensor (B38).
Washing rear window
AAM.
Rotary tumbler
microswitches, designThe rotary tumbler
microswitches are single-
pole normally open
contacts.
Rotary tumbler
microswitches, function GF82.20-P-4105-02GH
Windshield wiper GF82.30-P-3004GH
Intermittent wiping on
windshield GF82.30-P-3003GH
Windshield washer GF82.35-P-3002GH
Rear window washer GF82.35-P-3001GH
Intermittent wiping for
rear windowup to 31.8.00GF82.30-P-3001GH
as of 1.9.00GF82.30-P-3001GK
Location of components,
wiper system Windshield GF82.30-P-0005-01GH
Location of components,
wiper system Rear
window GF82.30-P-0004-01GH
All-activity moduleup to 30.11.99GF54.21-P-4100GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 39 © 2006 Mitchell Repair Information Company, LLC.

REAR WINDOW WIPER SYSTEM, LOCATION OF COMPONENTS - GF82.30-P-0004-01GH
Location of components
Fig. 22: Identifying Rear Window Wiper System Components Location

WINDSHIELD WIPER SYSTEM, LOCATION OF COMPONENTS - GF82.30-P-0005-01GH
Location of components
as of 1.12.99GF54.21-P-4100GK

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 40 © 2006 Mitchell Repair Information Company, LLC.

Fig. 23: Identifying Windshield Wiper System Components Location

As of 1.9.00 the vehicle is also offered with rain sensor (B38) code 344a. It is glued to the windshield.
CONTENTS - FUNCTION DESCRIPTION OF WIPER SYSTEM (WS) - GF82.30-P-0998GH
MODEL 163
Wiper system, function GF82.30-P-0003GH
Rear window wiper system,
location of components GF82.30-P-0004-
01GH
Windshield wiper system, location
of components GF82.30-P-0005-
01GH
Intermittent wiping for rear
window, functionup to 31.8.00GF82.30-P-3001GH
as of 1.9.00GF82.30-P-3001GK
Windshield intermittent wipe,
function GF82.30-P-3003GH
Windshield wiper, function GF82.30-P-3004GH
Anti-block device for wiper motor,
function GF82.30-P-4008GH
Rear window washer, function GF82.35-P-3001GH
Windshield washer, function GF82.35-P-3002GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 41 © 2006 Mitchell Repair Information Company, LLC.

REAR INTERMITTENT WIPE - FUNCTION - GF82.30-P-3001GH
MODEL 163 Applicable to 31.8.00
The rear intermittent wipe function is activated by placing the rear wiper/washer switch (S78) in the up
position. With the switch in this position, the All Activity Module (AAM) (N10) activates the tailgate wiper
motor (M6/4) every five seconds.
A relay circuit in the wiper motor stops the wiper arm in the park position.
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 .
Survey on wiper system
components (WS), location/
purpose/design/function GF82.30-P-9998GH
Rear wiper/washer switch GF82.30-P-4105GH
All Activity ModuleTo 30.11.99GF54.21-P-4100GH
As of 1.12.99GF54.21-P-4100GK
Tailgate wiper motor GF82.30-P-4105GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 42 © 2006 Mitchell Repair Information Company, LLC.

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.
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.
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
frequenc
y of the front windshield wiper and is thus controlled by the rain (B38)sensor . NOTE: The LED on the rear wiper/washer switch (S78) does not illuminate when
the vehicle is in reverse gear.
NOTE: The LED on the rear wiper/washer switch (S78) does not illuminate when
the vehicle is in reverse gear.

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 43 © 2006 Mitchell Repair Information Company, LLC.

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.
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.
WINDSHIELD INTERMITTENT WIPE, FUNCTION - GF82.30-P-3003GH
MODEL 163
Function sequence
The interval wiping function is switched on to position (i) with the combination switch.
The input (pin A8) of the all-activity module (AAM, N10) is connected to c. 15 R .
The AAM immediately actuates the front wiper motor relay (F1k17) for max. 2 s. In wiper stage 1 power is
supplied to the wiper motor (M6/1) b
y the relay (pin a).
Vehicle speed Under 50
km/hVehicle speed 50 to 100
km/hVehicle speed 100 km/h
and higher
Frequency of Rear wiperOne twelfth of front
wiper frequencyOne tenth of front wiper
frequencyOne sixth of front wiper
frequency
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/FunctionVehicles with code
345a (rain sensor)
onlyGF82.30-P-
4103GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 44 © 2006 Mitchell Repair Information Company, LLC.

Power is supplied to the motor by the cam switch and non-actuated contact of the relay F1 k17(pin b) until the
wiper arm has reached its park position. When the park position is reached the cam switch switches over. Then
the two motor connectors are short-circuited and the motor is braked by the eddy-currents.
Then the actual interval wiping starts. The described procedure is repeated for each interval.
Fig. 24: Identifying Windshield Intermittent Wipe Function

Interval actuation without code 345a (without rain sensor)
When the interval time is completed the AAM starts a new wiping procedure. The interval time is speed
dependent and is adjusted between 5 s when parked and 1 s at a speed of 180 km/h by the AAM.
Interval actuation as of 1.9.00 with code 345a (with rain sensor)
When c. 1 is ON: the rain sensor (B38) defines the wiping intervals .
The wiper motor relay (F1 k17) is actuated by the AAM at the intervals defined by the rain sensor (cf.
function sequence above). The relay switches off when c. 31 b (wiper not in park position) is recognized,
however, after 1 s (lock-up) at the latest.
In the event of heavy rain the relay remains actuated, the wiper operates as in stage 1.
Wiper motor,
location/purpose/design/function GF82.30-P-
4104GH
Safety switch-off (WS), functionas of 1.9.2000GF82.30-P-
3005GH
Anti-lock protection for wiper motor GF82.30-P-
4008GH
All-activity module (AAM),
location/purpose/ design/functionup to 30.11.99GF54.21-P-
4100GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
Saturday, October 02, 2010 3:30:04 PMPage 45 © 2006 Mitchell Repair Information Company, LLC.