Display Group 012

Notes on display field 3: The ignition timing point map switching is selected by knock control:
- First map = Ignition timing point - basic map (98 octane)
- Second map = Ignition timing point - map with reduced ignition angles (95 octane)

The ignition timing point difference between the first map and the second map is approx. 3° crankshaft. If an ignition timing point retarded by approx. 4° crankshaft is recognized (display field 4), the second map is selected Display groups 013 and 014 for more exact evaluation.

The second ignition timing point map is selected:
- If there is poor fuel quality (less than 95 RON)
- If there are abnormal engine noises (subassemblies loose)
- If there is engine damage (oil burning because of faulty piston)

If a knock sensor malfunction is recognized in DTC memory, ignition map switching is blocked.

Notes on display field 4:
- Knock control is active starting at an engine load greater than 40% Display groups 013 and/or 014.
- The ignition timing point retarding values are only used when knock control is "active".