Display Group 012
DISPLAY OVERVIEWVAG 1551 Display Overview, Display Group 012:
Notes on display field 3:
The ignition timing map switching is selected by the knock regulation:
^ 1st map = ignition timing - basic map
^ 2nd map = ignition timing - map with retarded ignition timing.
Ignition timing map 2 (2nd map) is selected:
^ With poor fuel quality (less than 95 RON octane).
^ With abnormal engine noises (attached components loose).
^ With engine damage (oil consumption because of damaged rings/pistons).
If a Knock Sensor (KS) malfunction is recognized by the ECM, the ignition map switching is blocked.
If ignition timing map 2 is selected, see display groups 013 and/or 014, for a detailed evaluation.
Notes on display field 4:
^ Knock regulation begins with engine load greater than 40%, see display groups 013 and/or 014.
^ Ignition timing retarding values are used only when knock regulation is "active".