sensor MERCEDES-BENZ ML320 1997 Complete Repair Manual

Fig. 179: Speed Sensor, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Operation
The RPM sensors are pressed against the transmission housing (51) by a spring (49) which is held against the
valve housing of the shift plate (2a). See .Fig. 179
This ensures a defined distance between the RPM sensors
and the exciter ring (50). RPM sensor 2 (Y3/6yn2) records the speed of the front planetary gear carrier via the
inner multiple-disc carrier of the front multiple-disc clutch (K1c).

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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Fig. 9: Identifying Headlamp Range Adjustment (HRA) Components
HEADLAMP RANGE ADJUSTMENT (HRA), FUNCTION - GF82.10-P-0001GH
MODELS 163.113 /136 /154 /172 /174 up to 31.8.01 with CODE (612b) Xenon headlamp unit with CODE
(U47) Conversion package
Function
The electrical headlamp range adjustment operates dynamically. Every change in the vehicle level is determined
and signaled to the headlamp range adjustment control module (N71) by the rear axle sensor and the front axle
sensor (A51, A52). The control module (N71) compares the vehicle level and the headlamp position. If
necessary, the headlamp setting is corrected by the control module (N71) via the headlamp range adjustment
motors (E1m1, E2m2). The headlamp position is only corrected if a modified vehicle level is signaled to the
control module (N71) by the front and rear axle sensors (A51, A52) for a specific time span.
Headlamp range adjustment control module (N71)
The headlamp range adjustment control module (N71) processes the signals from the front and rear axle sensors
(A51, A52) as well as the position of the headlamp range adjustment motors (E1m1, E2m1). After evaluating
these signals, commands are sent to the headlamp range adjustment motors (E1m1, E2m1).
Front and rear axle sensors (A51, A52)

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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A sensor is fitted to the front axle and to the rear axle and the sensors pick up the instantaneous vehicle level at
the control arm. These sensors (A51, A52) transmit the determined vehicle level to the control module (N71).
Headlamp range adjustment motor (E1m1, E2m1)
The position of the reflectors is signaled to the headlamp range adjustment control module (N71) by a
potentiometer in the headlamp range adjustment motor. The motors (E1 m1, E2m1) receive a command from
the control module (N71) for correcting the headlamp position. If the low beam is switched on and the key is in
position 2, the motors are referenced. The reflectors are moved to the lowest position and then, depending on
the vehicle level, moved to the correct position.
HEADLAMP RANGE ADJUSTMENT (HRA), FUNCTION - GF82.10-P-0001GHA
MODELS 163.113 /128 /154 /172 /174 as of 1.9.01, 163.157 with CODE (614) Bi-xenon headlamp unit
Function
The electrical headlamp range adjustment operates dynamically. Every change in the vehicle level is determined
and signaled to the headlamp range adjustment control module (N71) by the rear axle sensor and the front axle
sensor (A51, A52). The control module (N71) compares the vehicle level and the headlamp position. If
necessary, the headlamp setting is corrected by the control module (N71) via the headlamp range adjustment
motors (E1m1, E2m2). The headlamp position is only corrected if a modified vehicle level is signaled to the
control module (N71) by the front and rear axle sensors (A51, A52) for a specific time span.
Headlamp range adjustment control module (N71)
The headlamp range adjustment control module (N71) processes the signals from the front and rear axle sensors
(A51, A52) as well as the position of the headlamp range adjustment motors (E1m1, E2m1). After evaluating
these signals, commands are sent to the headlamp range adjustment motors (E1m1, E2m1).
Front and rear axle sensors (A51, A52)
A sensor is fitted to the front axle and to the rear axle and the sensors pick up the instantaneous vehicle level at
the control arm. These sensors (A51, A52) transmit the determined vehicle level to the control module (N71).
Headlamp range adjustment motor (E1m1, E2m1)
The position of the reflectors is signaled to the headlamp range adjustment control module (N71) by a
potentiometer in the headlamp range adjustment motor. The motors (E1 m1, E2m1) receive a command from
the control module (N71) for correcting the headlamp position. If the low beam is switched on and the key is in
position 2, the motors are referenced. The reflectors are moved to the lowest position and then, depending on
the vehicle level, moved to the correct position.
Headlamp range control
(HRC), location of
components GF82.10-P-0001-01GH

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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Fig. 11: Identifying Xenon Headlamp Components Location/Design
AUTOMATIC DRIVING LIGHT ACTUATION, FUNCTION - GF82.10-P-3003GH
MODEL 163 as of 01.09.01
The Automatic Driving Light Actuation automatically switches on the driving lights (side lamps, low beams
and license plate lamps), depending on the exterior lighting conditions (rain, snow, dusk and darkness).
Function prerequisites:
Exterior lamp switch in "AUTO" position
Circuit 15 "ON"
The sun sensor (B32) signals "Darkness" or the rain sensor (B38) signals "Rain"
Basic prerequisites for automatic driving light actuation are:
diminishing daylight intensity at dusk
darkness (tunnel, underground garage, ...)
rain or snowfall and
failure of rain/sun sensor ("Darkness" is signaled continuously)
Xenon headlamps,
function GF82.10-P-2007-
01GHA

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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during the day only the low beam is on
when dark, the side lamps, license plate lamps as well as the switch and controls illumination (circuit
58d) are switched on
With halogen headlights the low beam is operated during the day with a reduced voltage
The lighting switches off automatically if the gearshift lever remains in "P" or "N" position for more than
3 min
Scandinavia
with daytime running lamps the low beam, the side lamps and the license plate lamps are active
the daytime running lamps switch off if the light switch assumes the "side lamps ON" position
Other countries
with daytime running lamps the low beam, the side lamps and the license plate lamps are active
the daytime running lamps are always active
The high beams can only be switched on if the exterior lamp switch:
is at "low beam"
is at "AUTO" and "Darkness" is detected
daytime running lamps for "Other countries" has been coded
CONTENTS - FUNCTION DESCRIPTION OF EXTERIOR LIGHTING, LOCATION/ PURPOSE/DESIGN/FUNCTION -
GF82.10-P-9999B
MODELS 129, 140, 202, 208, 210, 163 up to 31.08.01 with CODE (612b) xenon headlamp unit
MODEL 163 as of 01.09.01 with CODE (614) bi-xenon headlamp unit
Automatic driving light
actuation, function GF82.10-P-3003GH
Table of contents,
function description for
exterior lighting GF82.10-P-0999A
Axle sensor for headlamp range
adjustment, location/taskMODELS 129, 140,
202, 208, 210 with
code 612b xenon
headlamp unitGF82.10-P-2100A
Headlamp range adjustment motor,
location/ taskMODELS 129, 140,
202, 208, 210 with
code 612b xenon
headlamp unitGF82.10-P-2101A

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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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
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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
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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
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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
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