Mercedes-Benz ML320. Service manual - part 806

 

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Mercedes-Benz ML320. Service manual - part 806

 

 

  

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/function

other than engine 111 EVO

GF30.22-P-
4010F

  Throttle valve actuator, location/task/design/ function

Engine 111 EVO

GF30.22-P-
4101GS

 

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

Engine 119.98, 120.98 in 
Model 129, 140 up to 5/96

GF30.20-P-
4012L

 

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

other than engine 111 EVO

GF07.61-P-
5000F
 

Engine 111 EVO

GF07.61-P-
5000GS

 

2001 Mercedes-Benz ML320 

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

  

me 

 

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 /95

ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969  

ENGINE 119.980 /981 /982 /985  

ENGINE 137.970  

Fig. 10: Identifying ME-SFI Idle Speed Control Function Diagram 

Task  

Controlling idle speed in the case of 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

different engine loads, e.g. power steering turned to full lock, engaging drive mode, switching on AC 
compressor  

different mixture, e.g. from activated charcoal canister if purging activated (depending on activated 
charcoal charge)  

Function  

The actuator EFP/TPM/LLR (additional designation: throttle valve actuator) regulates the idling speed by 
changing the throttle valve position. It is actuated by the ME-SFI control unit. 

The ME-SFI control unit actuates the throttle valve motor (M16/1 m1) in line with the input signals received at 
the ME-SFI control unit (N3/10). 

Heating speed of the catalytic converter  

In order to warm up the catalytic converter more rapidly to operating temperature, engine speed is increased in 
the idle speed range to 1100 up to 1500 rpm for about 20 seconds after each starting procedure at coolant 
temperatures of < 40 °C. When a Drive position is engaged, engine speed is immediately controlled to a lower 
value. 

Automatic transmission  

When a drive position is engaged, a lower engine speed is controlled in order to reduce the creeping tendency of 
the vehicle. The information "Drive position engaged/not engaged" is transmitted by the ETC control unit 
(N15/3) over the CAN databus to the ME-SFI control unit. 

Ignition angle  

To assist the idle speed control, the ignition angle can be retarded by as much as 36° crank angle or advanced by 
as much as 20° crank angle from the calculated specified value. 

  

The control in the idle speed range by altering the ignition angle reacts more rapidly than altering the position of 
the throttle valve. 

The idling speed can be influenced with HHT or the STAR DIAGNOSIS. 

AC compressor  

In order to avoid engine speed dropping in the idle speed range when the AC compressor is engaged, the AC 
push-button control unit (N19) or automatic air conditioning push-button control unit (N22) supplies a signal to 
the ME-SFI control unit (as of approx. 6/96 over CAN) and the opening cross-section of the throttle valve is 
enlarged. 

When the air conditioning unit is switched on and the external temperature exceeds 35° C the idling speed on 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

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 function

Engine 137

GF15.15-P-
3000L

  Pedal value sensor, location/task/design/ function  

GF30.20-P-
4011L

 

Coolant temperature sensor, location/task/ 
design/function

Engine 119, 120

GF07.04-P-
5026F

Engine 104, 111

GF07.04-P-
5026G

Engine 112, 113, 137

GF07.04-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, 210

GF07.61-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 function

Engine 120.98

GF30.20-P-
4026F

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

GF30.20-P-
4026E

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

 

 

 

 

 

 

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