Starter control, function - GF15.30-P-3000AM

ENGINE 113.990 #2 in MODELS 211, 219

ENGINE 113.991 #2 in MODELS 215, 220

ENGINE 113.992 #2 in MODEL 230

ENGINE 113.993 #2 in MODEL 463

ENGINE 113.995 #2 in MODEL 230

Fig 1: Identifying Starter Control, Function

Courtesy of MERCEDES-BENZ USA

CAN Data bus (Controller Area Network)

The starter control which is integrated in the ME control unit takes over the actuation of the starter and the deactivation of the starter after reaching the engine starting speed.

Starting prerequisites

The actuation of the starter is performed only during "start enable" (drive authorization) of the EIS control unit and when detecting the engaged drive position "P" or "N" via the ETC [EGS] control unit.

starting

By actuation of the ignition in the start position, the ME control unit receives the "tml. 50 signal" from the EIS control unit via the CAN data bus. Start control is carried out automatically by the ME control unit (touch start). It actuates the starter relay with a ground signal. The power contact on the starter relay closes and the starter solenoid switch is supplied at "terminal 50" with voltage from "terminal 15 unfused".

Ending start

When reaching the engine starting speed of 400 up to 700 RPM and a starting time of approx. 5 to 40 seconds (dependent on the coolant temperature), the ME control unit interrupts negative activation to the starter relay and therefore ends the starting procedure.

Once the start operation is initiated, switching off "circuit 50" (at Ignition/starter switch) has no further effect on the starting procedure.

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