Mercedes-Benz ML320. Manual — part 807

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/function

with MT

GF29.10-P-
2100F

SBC control unit, location/task/function

Model 211, 230: Request for increased
idle speed

GF42.46-P-
4500SL

2001 Mercedes-Benz ML320

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

me

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

me

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
spring capsule (mechanical end stop).

2001 Mercedes-Benz ML320

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

me

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