| GF07.61-P-0001F | Motor electronics (ME-SFI) fuel injection and ignition system function | 25.4.97 |
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| P07.61-0232-09 |
| ME control unit input signals, shown on engine 119
A16 Knock sensors B2/5 Hot film mass air flow sensor B6/1 Camshaft Hall sensor B11/4 Coolant temperature sensor B17 Intake air temperature sensor B24/7 Body acceleration sensor (up to 5/96) B37 Accelerator pedal sensor G3/3 Left O2 sensor, upstream TWC G3/4 Right O2 sensor, upstream TWC K40 Relay module L5 Crankshaft position sensor M16/1 Electronic accelerator (EA)/cruise control (CC) idle speed control (ISC) actuator N3/10 ME-SFI [ME] control unit |
N16/1 Base module N19 AAC control unit N22 AAC [KLA] control and operating unit N47-1 ASR/SPS control unit N47-5 ESP, SPS [PML] and BAS control unit S9/1 Stop lamp switch S40 CC [TPM] switch S43 Oil level check switch (oil pan right side) CAN Data bus B Connection via CAN to the ETC [EGS] control units (N15/3), ASR/SPS (N47-1), ESP/SPS (N47-5, SA), IFRCL (N54) |
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| P07.61-0233-09 |
| ME control unit output signals, shown on engine 119
55 Fuel filter 75 Fuel tank 77 Activated charcoal canister A1e43 EPC malfunction indicator lamp (electronic power control) K27 Fuel pump relay module K40 Relay module M3 Fuel pump M16/1 Electronic accelerator (EA)/cruise control (CC) idle speed control (ISC) actuator N3/10 ME control unit G3/3 Left O2 sensor upstream of TWC G3/4 Right oxygen sensor upstream TWC [KAT] T1/1- T1/8 Ignition coils |
X11/4 Diagnostic data link connector, 38-pin Y49/1 Left adjustable camshaft timing solenoid Y49/2 Right adjustable camshaft timing solenoid Y58/1 Purge control valve Y62 Fuel injection valves CAN Data bus B Connection via CAN to the ETC [EGS] control units (N15/3), ASR/SPS (N47-1), ESP/SPS (N47-5, SA), IFRCL (N54) F Fuel pump relay (K27), illustrated on model 140 g Relay module (K40), model 210 |
| Section through cylinder plane engine 112, 113
12 Variable intake manifold 17 Fuel rail 19 Exhaust manifold, air gap insulated 22 Variable flap R4 Spark plugs (dual ignition) Y62 Injector |
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| P07.61-0569-12 |
| The ME fuel injection and ignition system is a further development of the LH and DI and HFM systems, respectively.
The abbreviated designation ME 1.0 means: M = Engine e = Electronics 1.0 = Version (further version e.g. 2.0, 2.1, 2.7, 2.7.1 or 2.8) The following functions are combined in the ME-SFI control unit:  Fuel injection
Ignition
Electronic accelerator with cruise control and idle speed control
DTC memory/diagnostic system, complying with EURO3/4 or OBD II for 
Drive authorization system.
Fuel injection system The fuel is injected by electromagnetic fuel injectors. These are actuated sequentially by the ME-SFI control unit, in other words an injector is assigned to each cylinder which meters the quantity of fuel computed for the cylinder. |
The air mass is the main measured quantity for determining fuel metering. It is detected through the hot film mass air flow sensor or through the boost pressure sensor (when charging).
The ME control unit essentially analyzes the following information: Coolant temperature
Air mass
Engine speed
Throttle valve position
Intake air temperature
Accelerator pedal position
The vehicle speed
Knock identification
O2-sensor signals
Ethanol share in fuel tank,only Flexible Fuel Vehicle (FFV).
Idle speed control The idle speed is controlled by the throttle valve actuator, which is operated by the ME control unit, by altering the position of the throttle valve. |
| Camshaft adjustment
The inlet side camshaft of the engines 104, 111, 119 and 120 is adjusted on an electronic mapped basis by the ME-SFI control unit in the mid and upper engine speed and load range in order to boost the torque and power output.Engine 137 with one camshaft per cylinder bank also has camshaft adjustment. CAN data bus Dependent on year of construction, equipment and Model, control units are cross-linked via CAN. For example: RCL control unit
ME control unit (Engine 120: left ME control unit and right ME control unit) AT control unit
ABC control unit
SBC control unit
ETS/SPS [ETS/PML] control unit
ESP / SPS <ESP / PML control unit
ASR/SPS control unit
Instrument cluster
Electronic ignition switch.
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Electronic accelerator
No mechanical link between accelerator pedal and throttle valve actuator. The pedal value sensor detects the accelerator pedal input for the ME-SFI control unit. Transmission upshift delay (only AT and TWC) The shift points of the automatic transmission are delayed in line with temperature, vehicle speed and time in order to more rapidly heat up the catalytic converter to its operating temperature. ENGINE 120 There are two independent fuel injection and ignition systems fitted. A separate ME control unit is installed for cylinder 1 to 6 (right cylinder bank) and for cylinder 7 to 12 (left cylinder bank). |
| Ignition system
The high voltage is distributed without the use of moving parts, directly by the ignition coils to the spark plugs (rotorless high voltage distribution). The anti-knock control (AKC) function is integrated in the ME-SFI control unit. Engine 119, 120: an ignition coil is positioned above each spark plug. |
Engine 111, 104: a twin spark ignition coil is installed for each two cylinders. Engine 112, 113: two spark plugs and a dual ignition coil are installed for each cylinder. Engine 137: alternating voltage ignition system with ignition module for right and left cylinder bank, dual ignition. |
| ME-SFI fuel injection and ignition system model and component installation survey as-built configuration | GF07.61-P-0801F | ||
| ME-SFI ignition ON function | GF07.61-P-3005F | ||
| ME-SFI starting function | GF07.61-P-2003F | ||
| ME-SFI idle speed function | GF07.61-P-2006F | ||
| ME-SFI driving mode function | GF07.61-P-2005F | ||
| Motor electronics (ME-SFI) fuel injection and ignition system function diagram | Engine 113.940 up to 5/00 | GF07.61-P-0001-02B | |
| Engine 113.940/942/943/961/965 | GF07.61-P-0001-02BU | ||
| Engine 113.940 without TWC (code 828) | GF07.61-P-0001-02BF | ||
| Engine 113 as of 06/00 with EURO3/4 | GF07.61-P-0001-02K | ||
| Engine 113.941/948/960/966 |
GF07.61-P-0001-02KU | ||
| Engine 137.970 | GF07.61-P-0001-02L | ||
| Engine 137.970 |
GF07.61-P-0001-02LU | ||
| Motor electronics (ME-SFI) fuel injection and ignition system, arrangement of components | Engine 113 | GF07.61-P-0001-01BA | |
| Engine 137.970 | GF07.61-P-0001-01LA | ||
| with Engine 113.94/96, 137.970 | GF07.61-P-0001-01KB | ||
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ME-SFI survey of pneumatic diagrams | PP07.61-P-1100F | |
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ME-SFI [ME] vehicle features | Version ME2.0 and ME2.8
Engine 113.94/96 |
AH07.61-P-0002-02A |
| Engine 113, 137 | AH07.61-P-0002-02E | ||
| Engine 113 with low emission EURO3/4 | AH07.61-P-0002-02K | ||
| Version ME2.8
Engine 113.94/96 as of 06/00 |
AH07.61-P-0002-02N | ||
| CAN data bus, function | Vehicles with CAN | GF54.00-P-0005F | |
| Function of drive authorization system stage X | Enabling of engine control | GF80.30-P-2002F |