cruise control MERCEDES-BENZ ML320 1997 Complete Service Manual

If the faults described above exist, read out the fault memory. The indicator lamp EPC is only installed on types
129, 140 from about 4/95 to 6/96.
ME-SFI IDLE SPEED CONTROL FUNCTION - GF30.22-P-0003E
ENGINE 104.941 /943 /944 /991 /994 as of 1/8/96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
with CODE (498) as of Model year 97 Japanese version
ENGINE 111.921 /942 as of 1.9.98,
111.943,
111.944 as of 1.8.96,
111.946 as of 1.6.98,
111.947/973,
111.975 as of 1.8.96
ENGINE 111.945
Pedal value sensor, location/task/design/ function GF30.20-P-
4011L
Electronic accelerator/cruise control/idle speed control
actuator location/task/design/functionother than engine 111 EVOGF30.22-P-
4010F
Throttle valve actuator, location/task/design/ functionEngine 111 EVOGF30.22-P-
4101GS
Electronic power control indicator lamp,
location/task/design/functionEngine 119.98, 120.98 in
Model 129, 140 up to 5/96GF30.20-P-
4012L
Motor electronics control unit, location/task/
design/functionother than engine 111 EVOGF07.61-P-
5000F
Engine 111 EVOGF07.61-P-
5000GS

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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vehicles delivered from 6/00 is increased for the driving mode selected by about 100 rpm when the switch-on
threshold of about 900 rpm is exceeded. This increase is cancelled again when the external temperature drops
below 32° C.
Undervoltage
If the engine control unit detects an undervoltage the idling speed is increased until the ignition is switched off
for the driving mode selected by about 100 rpm.
If the control unit SBC reports an undervoltage to the engine control unit over CAN the idling speed for the
driving mode selected is increased to about 750 rpm.
Motor electronics control unit, location/task/
design/function GF07.61-P-
5000F
ME-SFI ignition system function GF15.12-P-
0001F
ECI ignition system functionEngine 137GF15.15-P-
3000L
Pedal value sensor, location/task/design/ function GF30.20-P-
4011L
Coolant temperature sensor, location/task/
design/function
Engine 119, 120GF07.04-P-
5026F
Engine 104, 111GF07.04-P-
5026G
Engine 112, 113, 137GF07.04-P-
5026A
Intake air temperature sensor, location/task/
design/function GF07.04-P-
2100F
ME fuel supply function
Engine 104, 111, 119, 120 in Model 129,
140, 170, 202, 208, 210GF07.61-P-
3004F
Engine 112, 113, 137 (except in Model
203, 209, 211)GF07.61-P-
3004A
Engine 112.91/94/95 203
Engine 112.91/94/95, 113.96 in Model
211
Engine 112.912/955, 113.968 in Model
209
GF07.61-P-
3004P
Crankshaft position sensor, location/task/
design/function GF07.04-P-
4116F
Electronic accelerator/cruise control/idle speed
control actuator location/task/design/function GF30.22-P-
4010F
Electronic accelerator pedal emergency running
mode functionEngine 120.98GF30.20-P-
4026F
Engine 104, 111, 112, 113, 119, 137GF30.20-P-
4026E

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Saturday, October 02, 2010 3:36:27 PMPage 18 © 2006 Mitchell Repair Information Company, LLC.

ELECTRONIC ACCELERATOR/CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR POSITION - GF30.22-P-4010-
01A
Fig. 11: Identifying Throttle Valve Actuator
ELECTRONIC ACCELERATOR/CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR DESIGN - GF30.22-P-4010-02F
Illustration shows actuator M16/4 (further designations: M16/1, M16/3, M16/6 throttle valve actuator)
ME-SFI TWC heating-up function GF07.61-P-
3032F
ETC control unit, location/task
Information on selector lever position
P/N and gear engaged in the case of
automatic transmission.
Transmission 722.6
GF27.19-P-
4012G
Clutch pedal switch, location/task/functionwith MTGF29.10-P-
2100F
SBC control unit, location/task/functionModel 211, 230: Request for increased
idle speedGF42.46-P-
4500SL

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Fig. 12: Identifying Electronic Accelerator/Cruise Control/Idle Speed Control Actuator Components
Each actuator contains two actual value potentiometers for detecting the position of the throttle valve. The
second potentiometer is used as a reference value to the plausibility check. In addition, the system switches over
to the second potentiometer if the first potentiometer fails.
ELECTRONIC ACCELERATOR/CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR FUNCTION - GF30.22-P-4010-
03F
Illustration shows actuator M16/4

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Fig. 13: Identifying Electronic Accelerator/Cruise Control/Idle Speed Control Actuator Components
Function
The actual value potentiometers for the throttle valve inform the ME control unit about the position of the
throttle valve (idling up to full load) in order to recognize the various loading conditions.
A.Ignition "Off"
In the de-energized state the throttle valve position is determined by the spring capsule (3).
B.Ignition "On"
When the ignition is switched on, the actuator motor in the EA/CC/ISC actuator is operated by the ME
control unit and the return spring is checked. The throttle valve adopts a position which then depends on
the coolant temperature.
C.Idle speed
The actuator motor controls the engine speed in the idle speed range by opening the throttle valve further,
depending on coolant temperature and engine load (increased mixture), or closing it further (reduced
mixture).
In this case, the throttle valve may be closed further by the actuator motor by overcoming the force of the
sprin
g capsule (mechanical end stop).

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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If the actuator is de-energized, the throttle valve is resting against the spring capsule. As a result the
throttle valve opening is constantly approx. 10 to 12 °. The engine speed for the no load condition is
about 1800 rpm.
D.Driving mode
The actuating motor when driving (partial/full load) regulates the throttle valve according to the various
loading conditions or according to the input signals from the front pedal value sensor (B37) according to
the position of the accelerator pedal.
E.Throttle valve damping
A damping function for the throttle valve is integrated in the ME control unit. In case of a sudden release of the
accelerator, the throttle valve in the idle speed range is closed with delay.

When first connecting to terminal 30 the ME control unit independently undertakes adaptation of the actuator
(learn the lower mechanical limit stop and full-load position of the throttle valve).
ELECTRONIC ACCELERATOR/CRUISE CONTROL/IDLE SPEED CONTROL ACTUATOR
LOCATION/TASK/DESIGN/FUNCTION - GF30.22-P-4010F
ENGINE 104.941 /943 /944 /991 /994 as of 1/8/96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
with CODE (498) as of Model year 97 Japanese version
ENGINE 111.921 /942 as of 1.9.98,
111.943,
111.944 as of 1.8.96,
111.946 as of 1.6.98,
111.947/973,
111.975 as of 1.8.96

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
me
Saturday, October 02, 2010 3:36:27 PMPage 22 © 2006 Mitchell Repair Information Company, LLC.

ENGINE 111.945
in MODEL 208.335 /435 as of 1.6.98,
202.020/080 as of 1.9.98
ENGINE 111.974
with CODE (494a) USA version
with CODE (807) Model year 1997
with CODE (808) Model year 1998
ENGINE
112.910 /911 /912 /913 /914 /916 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /953 /954 /9
5
ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969
ENGINE 119.980 /981 /982 /985
ENGINE 120.982/983
ENGINE 137.970
Fig. 14: Identifying Electronic Accelerator/Cruise Control/Idle Speed Control Actuator Function

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Saturday, October 02, 2010 3:36:27 PMPage 23 © 2006 Mitchell Repair Information Company, LLC.

CRUISE CONTROL (CC) FUNCTION - GF30.30-P-0001FA
ENGINE 112.923 /943, 113.961, 120.983 in MODEL 129
ENGINE 112.942 /970, 113.942 /965 in MODEL 163
ENGINE 111.943 /946 /958 /973 /983, 112.947 in MODEL 170
ENGINE 111.921 /944 /945 as of 1.8.99,
111.952/956/974,
111.975 as of 1.8.99,
112.910/920,113.944

Electronic accelerator/cruise
control/idle speed control actuator
position
Engine 104GF30.22-P-
4010-01D
Engine 111GF30.22-P-
4010-01G
Engine 112, 113GF30.22-P-
4010-01A
Engine 119GF30.22-P-
4010-01E
Engine 120GF30.22-P-
4010-01F
Engine 137GF30.22-P-
4010-01L

Electronic accelerator/cruise
control/idle speed control actuator
task
Determining the opening angle of the throttle valve
in accordance with the operating condition:
Controlling idle speed under different engine
loads (power steering turned to full lock, AC
compressor engaged)
Cruise control mode
Emergency electronic accelerator pedal
Driving, in accordance with accelerator pedal
position.


Electronic accelerator/cruise
control/idle speed control actuator
task
GF30.22-P-
4010-02F

Electronic accelerator/cruise
control/idle speed control actuator
function
GF30.22-P-
4010-03F

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Saturday, October 02, 2010 3:36:27 PMPage 24 © 2006 Mitchell Repair Information Company, LLC.

Fig. 15: Identifying Cruise Control Function - Shown On Engine 111 Euro3/4
Task
Maintaining the preselected vehicle speed constant irrespective of the engine load, without operation of the
accelerator pedal.
Function
The cruise control function is integrated in the engine control unit. It can be activated from > 40 km/h with the
cruise control switch. The engine control unit operates the throttle valve actuator for the cruise control function
with the aid of the input signals and the position of the cruise control switch.
The cruise control mode is switched off by:
pushing the cruise control push-button switch (S40) or variable cruise control push-button switch (S40/4)
into the "OFF" position
Operating the service brake
Moving selector lever into position "N"
Control intervention function of traction system
Vehicles with column sleeve module (MRM)
The signals from the push-button switch for the cruise control are detected by the steering column module and
transmitted to the CAN data bus.

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
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Vehicles with EZS control unit without column sleeve module (MRM)
The signals from the push-button switch for the cruise control are detected by the control unit EIS and
transmitted to the CAN data bus.
Vehicles without EZS control unit
The signals from the cruise control switch are transmitted directly to the engine control unit.
Vehicles with manual transmission (MT)
Cruise control remains active during gear change, in other words the cruise control is not switched off when the
clutch is operated.
Traction systems control unit
Transmits the vehicle speed signal via CAN to the ME control unit.
CRUISE CONTROL SWITCH, LOCATION/TASK/DESIGN/FUNCTION - GF30.30-P-3100F
ENGINE 104 (except 104.98),
Motor electronics control unit, location/task/
design/functionother than engine 111 EVOGF07.61-P-
5000F
Engine 111 EVOGF07.61-P-
5000GS
Cruise control switch, location/task/design/
functionwith cruise control or Distronic GF30.30-P-
3100F
Variable cruise control switch, location/task/
design/functionwith cruise control or Distronic except
GF30.30-P-
3101A
Electronic accelerator/cruise control/idle speed
control actuator location/task/design/function GF30.22-P-
4010F
Throttle valve actuator, location/task/design/
functionEngine 111 EVOGF30.22-P-
4101GS
Stop lamp switch, location/task/function GF42.10-P-
4000A
Clutch pedal switch, location/task/functionwith MTGF29.10-P-
2100F
Variable speed limiter, functionAdditional cruise control function except
GF30.30-P-
3001A
ETC control unit, location/task
Transmits information about the selector
lever position P/N and the driving mode
selected via CAN.
Transmission 722.6
GF27.19-P-
4012G

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY CAB Throttle Control, Speed Control Systems - 163 Chassis
me
Saturday, October 02, 2010 3:36:27 PMPage 27 © 2006 Mitchell Repair Information Company, LLC.