1997 MERCEDES-BENZ ML320 Complete Repair Manual

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Page 3849 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual ENGINE 111.945
in MODEL 202.020 /080 as of 1.9.98,
208.335/435 as of 1.6.98
with CODE (494a) USA-Ausfuhrung
with CODE (807) Model year 1997
with CODE (808) Model year 1998
ENGINE
112.910

Page 3850 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual Fig. 8: Identifying Accelerator Pedal Sensor - Shown On Model 203, 215, 220
Pedal value sensor position
Model 129GF30.20-P-
4011-01D
Model 140GF30.20-P-
4011-01A
Model 163GF30.20-P-
4011-01GH
Model

Page 3851 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual PEDAL VALUE SENSOR CHARACTERISTIC CURVE WHEN REVERSING FUNCTION - GF30.20-P-4013E
ENGINE 104.943 /944 /991 /994 as of 1.8.96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model ye

Page 3852 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual ENGINE 119.980 /981 /982 /985
ENGINE 120.982/983
ENGINE 137.970
Fig. 9: Identifying Pedal Value Sensor Function Diagram

Task
Optimizing driving comfort and safety when reversing.
Design/fun

Page 3853 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual ELECTRONIC ACCELERATOR PEDAL EMERGENCY RUNNING MODE FUNCTION - GF30.20-P-4026E
ENGINE 104.941 /943 /944 /991 /994 as of 1/8/96
ENGINE 104.995
with CODE (494a) USA version
with CODE (807) Model

Page 3854 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969
ENGINE 119.980 /981 /982 /985
ENGINE 137.970
Task
To allow safe further driving depending on the fault which has arisen

ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969
ENGINE 119.980 /981 /982 /985
ENGINE 137.970
Task
To allow safe further driving depending on the fault which has arisen in the electronic accelerator pedal system.
Pedal value sensor emergency mode
If the sensor in the pedal value sensor (B37) fails, the system will switch over to the second sensor. The throttle
valve opening is limited to approx. 60%. There is also dynamic limitation of the throttle valve's opening speed
where the throttle valve opening is delayed (the indicator lamp EPC does not light up).
If the plausibility check delivers a negative result or both sensors are defect only the idling speed will be
regulated (the indicator lamp EPC lights up).
Actuator for the throttle valve - emergency running, electrical
If a potentiometer in the actuator for the throttle valve breaks down the system switches-over to the second
intact potentiometer. The air flow mass serves as a second parameter for comparative purposes. Following a
plausibility check, the throttle valve opening is limited to approx. 60% in line with engine speed and load (EPC
indicator lamp does not come on).
If the plausibility check is negative or if both potentiometers are faulty, the throttle valve adopts a mechanical
emergency running position which is fixed by the spring capsule in the actuator (EPC indicator lamp comes on).
Actuator for the throttle valve - emergency running, mechanical emergency running stop
If the actuator motor is defect or there are other faults present the power supply to the actuator will be shut off.
The throttle valve then lies on the mechanical stop (spring box) so the throttle valve opening remains at a
constant 10-12°. At no engine load (idling) engine speed is regulated to about 900 rpm by shutting off or
activating the cylinders at the fuel side.
When driving, engine speed is controlled, in line with the engine load, by switching the cylinders off and on at
the fuel side. The maximum engine speed is about 1800 rpm. which is limited by the mechanical stop (the
indicator lamp EPC lights up).
Safety fuel shutoff
If a mechanical fault exists in the actuator, the safety fuel shutoff is activated.
Here the fuel injection valves are shut off for engine speeds < 1400 rpm and actuated again at speeds < 1200
rpm (the indicator lamp EPC li
ghts up).

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 14 © 2006 Mitchell Repair Information Company, LLC.

Page 3855 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair 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-

Page 3856 of 4133

MERCEDES-BENZ ML320 1997 Complete Repair Manual 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 /91

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