| GF07.61-P-5001R | Voltage supply of ME-SFI control unit, function | 23.5.06 |
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| F33 Rear prefuse box
(Fuses 200 A and 60 A screwed on to reverse side) N3/10 ME-SFI [ME] control unit (ME2.7.1) K40/4 Passenger-side fuse and relay module K40/4f43 Fuse 43 (circuit 87 engine 1, connector sleeve Z7/35) K40/4f44 Fuse 44 (circuit 87 engine 2, connector sleeve Z7/36) K40/4kK Motor electronics relay and chassis (plug position K) K40/4kL Starter relay (plug position L) K40/4kM Circuit 30z relay (AMG) K40/4kM Backup relay K40/4kO Air pump relay or reserve (plug position O) |
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| P07.61-2880-06 |
| N3/10 ME-SFI [ME] control unit (ME2.7.2) |  | |
| P07.61-3447-01 |
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| P07.61-3439-07 |
| K40/4 Passenger-side fuse and relay module |
| Fuse and relay location on the passenger-side fuse and relay module for the engine control
29 Spare or fuse 29 (terminal 87 engine 1, connector sleeve Z7/35) 30 Spare or fuse 30 (terminal 87 engine 2, connector sleeve Z7/36) 31 Spare or fuse 31 (air pump) 32 Spare or fuse 32 (air pump) 43 Spare or fuse 43 (terminal 87 engine 1, connector sleeve Z7/35) 44 Spare or fuse 44 (terminal 87 engine 2, connector sleeve Z7/36) |
K Motor electronics/chassis relay L Starter relay M Circuit 30z relay (AMG) N Spare or air pump relay O Spare or air pump relay |
| F33 Rear prefuse box |  | |
| P07.61-3437-01 |
| Location of fuses on the rear prefuse box
F1 Fuse 200 A, power supply for driver-side fuse and relay module F2 Fuse 60 A, power supply for rear fuse and relay module |
F3 Fuse 7.5 A, power supply for terminal 30Z for ME-SFI [ME] control unit, EIS [EZS] control unit and steering column module. |
| F32 Front prefuse
F52 Fuse through-plating 1 Fuse 100 A for starter and starter battery 2 Fuse 200 A for alternator |
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| P07.61-3438-06 |
| F32 Front prefuse |  | |
| P07.61-3436-11 |
| Location of fuses on the front prefuse box in the front passenger footwell under the floor panel
F1 Fuse 100 A, power supply for electrical suction fan F2 Fuse 200 A, power supply for passenger-side fuse and relay module F3 Fuse 200 A, power supply for driver-side fuse and relay module |
F4 Fuse 80 A, power supply for EIS [EZS] control unit F5 Fuse 40 A, power supply for SBC control unit F6 not used, used for cable duct F7 Fuse 40 A, power supply for blower motor. |
| The power supply is via the front prefuse box (F32), the rear prefuse box (F33), the passenger-side fuse and relay module (K40/4) and the rear fuse and relay module (K40/5).
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Voltage supply: refer to Wiring Diagrams, Group 54. The ME control unit features a short-circuit protection as well as a reversed polarity protection in the operating voltage section. |
| If all prefuses are OK, the motor electronics/chassis relay (K40/4kK) is connected to terminal 30.
If the relay has closed the power contact, power is supplied via the relay from circuit 30z via two fuses as tml. 87 engine 1 (required for engine running) and tml. 87 engine 2 (not essential for engine running) to ME control unit and engine control. |
The motor electronics/chassis relay are actuated by the ME control unit on the ground side when the incoming signal "tml. 15 fused On" from EIS control unit is detected by the ME control unit.
If the ME control unit detects the signal "tml. 15 Fused Off" from the EIS control unit, the motor electronics/chassis relay continues to be actuated by ME control unit until computer power down is complete. In this way, the ME control unit determines pick-up and holding of the relay for the motor electronics/chassis relay. Once the computer has powered down, the relay is disconnected and the ME control unit and engine control are isolated from the on-board electrical system. |
| ME-SFI control unit, location/task/design/function | GF07.61-P-5000M |