LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2003 >> SLK32 >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Mixture Formation -- Basic Knowledge -- 170 Chassis >> Basic Knowledge >> Start recognition function - GF07.13-P-3014G
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Start recognition function - GF07.13-P-3014G

ENGINE 104.941 /943 /944 /991 /994 as of 1.8.96 Start recognition via circuit 50 

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 Start recognition via circuit 50 

ENGINE 111.921 /942 as of 1.9.98, 111.946 as of 1.6.98, 111.944 /975 as of 1.8.96, 111.943 /947 /951 /952 /955 /956 /957 /958 /973 /982 /983 Start recognition via circuit 50 

ENGINE 111.945 in MODEL 202.020 /080 as of 1.9.98, 208.335 /435 as of 1.6.98 Start recognition via circuit 50 

ENGINE 111.974 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 Start recognition via circuit 50 

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 /50 /975 Start recognition via circuit 50 

ENGINE 113.940 941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 Start recognition via circuit 50 

ENGINE 137.970 Start recognition via circuit 50 

Illustrates vehicle without EIS and without starter control 

Fig 1: Identifying Start Recognition Function - Illustrates Vehicle Without EIS And Without Starter Control
G04736620

Function 

The engine control unit is informed via the introduced starting procedure through "terminal 50". This is necessary in order, for example, to trigger the start quantity control, the starter control, the post-start enrichment and ignition timing when starting.

Vehicles with EIS without CAN 

When the electronic ignition key is turned into the start position, the electronic ignition switch control unit (N73) supplies the CAN message "circuit 50".

Vehicles with EIS and CAN 

When the electronic ignition key is turned into the start position, the electronic ignition switch (N73) control unit supplies the start signal circuit 50 to the engine control unit from the output pin B9. The output is short-circuit proof and can accept a maximum load of 250 mA.

Vehicles with ignition start switch 

Circuit 50 of ignition/start switch is switched to the engine control unit.

  ME-SFI control unit position/task/design/ function   GF07.61-P-5000F 
  CAN databus, function Vehicles with CAN GF54.00-P-0005F
  Electronic ignition switch control unit, location/ task/design/function Model 202 as of 6/97, 208, 210 as of 3/97, 210.081/281 GF80.57-P-4102A
    Model 215, 220 GF80.57-P-4102S
    Model 203, 209 GF80.57-P-4102PP