Motor electronics (ME) ignition system, function - GF07.61-P-3008CY
ENGINE 272.911 in MODEL 204.0 up to Model Year 08
ENGINE 272.921 in MODEL 204.0/2 up to Model Year 08
ENGINE 272.947 in MODEL 204.0/2 up to Model Year 08
ENGINE 272.948 in MODEL 204.0 up to Model Year 08
ENGINE 272.961 in MODEL 204.0/2 up to Model Year 08
ENGINE 272.971 in MODEL 204.0 up to Model Year 08
Cylinder arrangement and ignition firing order
The ME-SFI [ME] control unit (N3/10) essentially analyzes the following signals for determining the ignition angle:
- Air mass
- Position and rotational speed of the crankshaft
- Positions of the intake camshafts
- Positions of the exhaust camshafts
- Coolant temperature
- Intake air temperature
- Knock sensor signals
- Intake manifold air pressure
- Engine torque requests
The ME-SFI [ME] control unit interrupts the primary circuit to "circuit 1" of the respective cylinder 1 to 6 ignition coils (T1/1 to T1/6) in the moment of ignition timing.
Ignition angle adaptation
An ignition angle adaptation in the direction "retarded" or "advanced" can take place for the following partial functions:
- Catalytic converter heating-up
- Idle speed control
- Overheating/knock protection
- Deceleration fuel shutoff
- Transmission overload protection (for automatic transmission 722.9)
- Anti-knock control [AKC]
- Engine torque requests
The ignition angles can only be checked using the DAS.
| Electrical function diagram for ignition system | PE15.12-P-2050-99FAB | ||
| Component description for the crankshaft Hall sensor | B70 | GF07.04-P-6221CY | |
| Component description for the camshaft Hall sensor | B6/4-B6/7 | GF07.04-P-6022CY | |
| Component description for the knock sensor | A16/1, A16/2 | GF07.04-P-6030CY | |
| Component description for the coolant temperature sensor | B11/4 | GF07.04-P-6043CY | |
| Component description for the intake manifold pressure sensor | B28 | GF07.04-P-6062CY | |
| Component description for the hot film mass air flow sensor | B2/5, B2/5b1 | GF07.07-P-6000CY | |
| Component description for the ME-SFI [ME] control unit | N3/10 | GF07.61-P-6000CY | |
| Component description for spark plugs | R4 | GF15.10-P-2000CY | |
| Component description for ignition coils | T1/1-T1/6 | GF15.10-P-2100CY | |
| Component description for the throttle valve actuator | M16/6 | GF30.20-P-2021CY | |
| Component description for the accelerator pedal sensor | B37 | GF30.20-P-2011CY |