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Fan control function - GF07.61-P-3023G

ENGINE 111.943 /947 /951 /952 /955 /956 /957 /958 /973 /982 /983, 111.944 /975 as of 1.8.96, 111.946 as of 1.6.98, 111.921 /942 as of 1.9.98 with CODE (580) Air conditioning or Tempmatic for USA with CODE (581a) Air conditioning (Automatic) 

ENGINE 111.945 in MODEL 208.335 /435 as of 1.6.98, 202.020 /080 as of 1.9.98 with CODE (580) Air conditioning or Tempmatic for USA with CODE (581a) Air conditioning (Automatic) 

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 /955 /970 /972 /973 /975 

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

ENGINE 137.970 

Shown on Engine 111 

Fig 1: Fan Control Function (Shown On Engine 111)
G04738373

The ME-SFI control unit indirectly actuates the fan through the engine/ AC electric suction fan control unit.

The fan specified speed is transmitted by the ME control unit to the engine/AC electric suction fan control unit by means of a pulse width modulated signal. The on/off ratio is 10 to 90%, in which the following means e.g.:

10% electric suction fan OFF

20% electric suction fan ON, minimum speed

90% electric suction fan ON, maximum speed

If the actuation is faulty, the electric suction fan rotates with maximum rotational speed.

The status of the air conditioning or automatic air conditioning is transmitted from the instrument cluster via the CAN to the ME control unit. The fan specified speed is dependent on this status.

IMPORTANT CAN capable instrument cluster required, that the HHT or STAR DIAGNOSIS is programmed according to with/without air conditioning or automatic air conditioning.

Engine 112 at production start-up as of 3/97 with viscous fan clutch, fan control phased in as of 7/97.

On engine 137 and in Model 203, 209, 211, 230 an electric suction fan is built-in with integrated control. The engine/air conditioning electric suction fan control unit is deleted.

  Motor electronics control unit, location/task/design/function other than engine 111 EVO GF07.61-P-5000F 
    Engine 111 EVO GF07.61-P-5000GS 
  Coolant temperature sensor, location/task/design/function Engine 104, 111 GF07.04-P-5026G 
    Engine 112, 113, 137 GF07.04-P-5026A 
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