Mercedes-Benz ML320. Service manual - part 383

 

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Mercedes-Benz ML320. Service manual - part 383

 

 

Fig. 6: Identifying Cylinder 1 To 8 Ignition Coil - Location Engine 113 

IGNITION COILS, FUNCTION - GF15.10-P-3102-02A 

Each spark plug is actuated separately via its own ignition coil by the ME control unit. Both ignition coils of a 
cylinder are combined to form a dual ignition coil. 

The ME control unit actuates the primary wirings (L1) of the double ignition coils at circuits 1 a or 1 b with 
ground. 

The primary current flow is interrupted at the moment of ignition timing point. As a result of the sudden 
collapse of the magnetic field the ignition voltage is generated in the secondary windings (L2). The ignition 
voltage flows through the high voltage connection (4a and 4b) and through the spark plug connector to the 
respective spark plug (R4). 

The voltage supply of the double ignition coils is protected at circuit 15 (a). 

Diodes are built-in to suppress additional ignition sparks when the primary current is switched on. 

  

Because of the diodes, it is not possible to measure the resistance in the secondary windings. 

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

  

me 

 

Fig. 7: Identifying Ignition Coils, Function 

IGNITION COILS, LOCATION/TASK/DESIGN/FUNCTION - GF15.10-P-3102A 

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  

Fig. 8: Identifying Ignition Coil Components - Shown On Engine 112

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

  

me 

 

ME-SFI IGNITION SYSTEM FUNCTION DIAGRAM - GF15.12-P-0001-01A 

Fig. 9: Identifying ME-SFI Ignition System Components - Engine 112 

ME-SFI IGNITION SYSTEM FUNCTION DIAGRAM - GF15.12-P-0001-01B 

 

Ignition coils, location

 

GF15.10-P-3102-01A

 

Ignition coils, task

Supplying adequate 
ignition energy in all 
operating conditions for 
the particular ignition 
circuit.

 

 

Ignition coils, design

One double ignition coil 
for each cylinder. Attached 
to cylinder head cover.

 

 

Ignition coils, function

 

GF15.10-P-3102-02A

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

  

me 

 

Fig. 10: Identifying ME-SFI Ignition System Components - Engine 113 

ME-SFI IGNITION SYSTEM SIGNAL ASSIGNMENT - GF15.12-P-0001-02A

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Electrical System - Engine - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

Content   ..  381  382  383  384   ..