Starting System: Description and Operation

GF15.30-P-3000AM Starter Control, Function
ENGINE 113.990 #2 in MODEL 211, 219
ENGINE 113.991 #2 in MODEL 215, 220
ENGINE 113.992 #2 in MODEL 230 up to Model Year 2008
ENGINE 113.993 #2 in MODEL 463 up to 31.5.12
ENGINE 113.995 #2 in MODEL 230 up to Model Year 2008





B11/4 Coolant temperature sensor
K40/4 Passenger-side fuse and relay module (model 230)
K40/4kL Starter relay (model 230)
K40/7 Right front fuse and relay module (model 215, 220)
K40/7kL Starter relay (model 215, 220)
L5 Crankshaft position sensor
M1 Starter (circuit 50)
N3/10 ME control unit
N10/1 Driver-side SAM control unit with fuse and relay module (models 211, 219)
N10/1 Front signal acquisition and actuation module (SAM) (model 463)
N10/1kL Starter relay (models 211, 219)
N10/1kS Starter relay (model 463)
N15/3 EGS control unit
N73 EIS [EZS] control unit
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.