Mercedes-Benz ML320. Service manual — part 803

The opening angle of the throttle valve will only be determined by the accelerator pedal specification when no
limiting functions are active.

The accelerator pedal position is detected by the set value potentiometer (B37r1) or Hall sensor in the pedal
value sensor (B37) and information is released to the ME control unit (N3/10). In this way, the ME-SFI control
unit determines the position of the throttle valve and actuates the throttle valve motor (M16/1 m1).

The actual value potentiometer in the actuator (M16/1r1) signals the throttle valve position back to the ME-SFI
control unit.

The second potentiometer in the actuator (M16/1 r2) and the second signal from the pedal value sensor
(potentiometer or Hall sensor) supplies a reference value for the plausibility check. In addition, the system
switches over to the second potentiometer or the Hall sensor if the first potentiometer or Hall sensor fails
(emergency mode).

Adaptive accelerator pedal (model 203, 209, 211, 215, 220, 230):

The engine control unit recognizes how the accelerator pedal is being actuated and switches between
characteristic curves. Eighty percent of the engine load is released for a pedal travel of about 50 % for a sporty
driver and about 40 % for a quiet driver. There is no further difference felt above a pedal travel of about 90 %.

If, for example, the characteristic curve for a quiet driver is active after a long drive on the motorway then the
accelerator pedal must be pressed down unusually hard to obtain a higher acceleration level.

Kickdown switch (S16/6)

The kickdown switch was no longer used from 9/01. Recognition of full load is now achieved over the signal
from the pedal value sensor. The pressure point on the accelerator pedal before achieving the full load position
remains.

Motor electronics control unit, location/task/
design/function

except M111 EVO

GF07.61-P-
5000F

M111 EVO

GF07.61-P-
5000GS

Electronic accelerator/cruise control/idle speed
control actuator location/task/design/function

except M111 EVO

GF30.22-P-
4010F

Throttle valve actuator, location/task/design/
function

M111 EVO

GF30.22-P-
4101GS

Pedal value sensor, location/task/design/
function

GF30.20-P-
4011L

ME-SFI idle speed control function

Except engine 120 and engine 111 EVO

GF30.22-P-
0003E

M111 EVO

GF30.22-P-
0003GS

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis

me

PEDAL VALUE SENSOR POSITION - GF30.20-P-4011-01GH

Electronic power control indicator lamp,
location/task/design/function

Engine 119, 120 in Model 129, 140 up to
5/96

GF30.20-P-
4012L

Electronic accelerator pedal emergency running
mode function

Engine 104, 111, 112, 113, 119, 137

GF30.20-P-
4026E

30 km/h limit, function

Model 129, 140 with Engine 104,
119.98, 120.98
except

GF30.20-P-
4027F

Cruise control (CC) function

With cruise control

GF30.30-P-
0001F

Engine 104 (except HFM sequential
multiport fuel injection/ignition system),
119.98, 120.98

With cruise control
Engine 111, 112, 113, 137

GF30.30-P-
0001FA

Variable speed limiter, function

Additional cruise control function except

GF30.30-P-
3001A

Distronic (DTR), function

Model 220, 215 with code 219a up to
6/00

GF30.30-P-
0002K

Model 203, 209, 211, 230 with code
219a

GF30.30-P-
0002KA

Model 215, 220 with code 219a as of
7/00

Pedal value sensor characteristic curve when
reversing function

GF30.20-P-
4013E

ASR V control unit location/task/design/function

with code 471 a
Model 129, 140, 202 as of 6/94, 170,
208, 210

GF42.40-P-
4500A

ESP control unit location/task/function

with code 472a
Model 129 with Engine 104, 119, 120
Model 140
Model 210 with engine 119

GF42.45-P-
4500A

with code 472a
Model 129 with engine 112, 113
Model 163 up to 8/02, 168, 215
Model 220 (except 220.08/18) Model
202, 208 with engine 112, 113
Model 210 with engine 111, 112, 113

GF42.45-P-
4500B

with code 472a
Model 170 with Engine 111, 112
Model 202, 208 with Engine 111
Model 203

GF42.45-P-
4500C

Model 211, 230

GF42.45-P-
4500SL

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis

me

Model 163

in left of component compartment

Fig. 2: Locating Pedal Value Sensor (Hall Principle)

PEDAL VALUE SENSOR DESIGN - GF30.20-P-4011-02B

with two Hall elements

Fig. 3: Identifying Pedal Value Sensor (With Hall Principle)

Illustration shows internal circuitry of pedal value sensor B37 (with Hall principle)

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis

me

Fig. 4: Identifying Internal Circuitry Of Pedal Value Sensor

The pedal value sensor based on the Hall principle consists of two Hall elements, 2 magnets, electronics and a
restoring spring. The magnets are moved by means of the linkage or cable attached to the pedal value sensor
and thus alter the direction of the magnetic field relative to the fixed Hall elements. This produces a change in
the voltage.

The pedal value sensor is supplied with 5V only at pin 1. Pin 2 is not connected internally. The information
regarding the accelerator pedal position is passed to the engine control module by means of two voltages (pin 4:
approx. 0 to 2.25V and pin 5: approx. 0 to 4.5V). The pedal value sensor with potentiometer can be replaced
with the pedal value sensor based on the Hall principle (but not vice versa).

PEDAL VALUE SENSOR DESIGN - GF30.20-P-4011-02C

Fig. 5: Identifying Accelerator Pedal Module With Kickdown Switch (Up To 7/02) Components

Illustration shows accelerator pedal module with kickdown switch (S16/6).

Was only installed until about 7/02. One then used the accelerator pedal module with kick-down simulator (a).

2001 Mercedes-Benz ML320

1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis

me