Display Group 012

VAG 1551 Display, Measuring Value Block Display Group 012:

Key to VAG 1551 Display, Measuring Value Block 12

NOTES on display field 3:
The ignition timing point map switching is selected by the knock control:
^ 1st map = basic map
^ 2nd map = map with reduced ignition angles
^ If a knock sensor malfunction is stored in DTC memory, ignition map switching is blocked
Ignition timing point 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 pistons/rings).
If ignition timing point map 2 is selected, see display fields 013 and/or 014 for more exact evaluation.

NOTES on display field 4:
^ Knock control is active starting at an engine load greater than 40% see display groups 013 and/or 014.
^ Ignition timing point retarding values are used only when knock control is "active".