audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

ABOUT US
Evaluation of display group 020//022/023 - Ignition timing retardation > < Checking knock control stop

A3 Mk1

Measured value blocks for ignition timing retardation
   
Measured value blocks for ignition timing retardation
Display group 020 -Ignition- knock control
l  Normal driving
Read measured value block 20→▾Display:  
xx.x°BTDCxx.x°BTDCxx.x°BTDCxx.x°BTDC   
    Ignition timing retardation by knock control, cylinder 40 ...12 °crankshaft → Chapter
   Ignition timing retardation by knock control, cylinder 30 ...12 °crankshaft → Chapter
  Ignition timing retardation by knock control, cylinder 20 ...12 °crankshaft → Chapter
 Ignition timing retardation by knock control, cylinder 10 ...12 °crankshaft → Chapter

  Note!
The numerical values displayed in zones 1 to 4 represent the actual ignition timing retardation by the knock control for the individual cylinders. The ignition timing is retarded in ° crankshaft (degrees). The displayed “BTDC” units can be disregarded.
   
Display group 022 -Ignition- Knock control
l  Normal driving
Read measured value block 22→▾Display:  
xxxx rpmx.x %xx.x°crankshaftxx.x°crankshaft   
    Ignition timing retardation by knock control, cylinder 20 ...12 °crankshaft → Chapter
   Ignition timing retardation by knock control, cylinder 10 ...12 °crankshaft → Chapter
  Engine load0...100 %---
 Engine speed760...6500 rpm---

  Note!
The numbers displayed in display zones 1 and 2 represent the actual ignition timing retardation due to the knock control of cylinders one and two. The ignition timing is retarded in ° crankshaft (degrees). The displayed “BTDC” units can be disregarded.
   
Display group 023 -Ignition- Knock control
l  Normal driving
Read measured value block 23→▾Display:  
xxxx rpmx.x %xx.x°crankshaftxx.x°crankshaft   
    Ignition timing retardation by knock control, cylinder 40 ...12 °crankshaft → Chapter
   Ignition timing retardation by knock control, cylinder 30 ...12 °crankshaft → Chapter
  Engine load0...100 %---
 Engine speed760...6500 rpm---

  Note!
The numbers displayed in display zones 3 and 4 represent the actual ignition timing retardation due to the knock control of cylinders three and four. The ignition timing is retarded in ° crankshaft (degrees). The displayed “BTDC” units can be disregarded.
   

Evaluation of display group 020//022/023 - Ignition timing retardation > < Checking knock control stop