Skoda OCTAVIA MK1 Service Manual page 172

Display group 017 (knock control):
l Engine runs in idling speed
Reading measured value
block 17
x.xxx Vss x.xxx Vss x.xxx Vss x.xxx
1 2
Knock sensor voltage signal cylinder 1
Note
t Regarding display fields 1 to 4:
If a difference of more than 50% exists between the smallest and largest knock sensor
t
signal, the cause may be corrosion at the plug connection.
t Testing knock sensor
If no fault is detected when the lines and the plugs are tested, the additional units must be
t
checked for separation or engine damage.
At a higher speed, the readout of the knock sensor voltage signal may reach the value of
t
as much as 5.1 V.
corroded
t Engine damaged
Component parts
t
on engine loose
→ ← Readout on display
Vss
3 4 ← Display fields
Knock sensor voltage signal
cylinder 4
Knock sensor voltage signal cylinder 3
Knock sensor voltage signal cylinder 2
→ Chapter.
Test compression pressure:
–
ltr./74 kW Engine, Mechanics → Rep.
Gr.15
– Attach component parts
172
→ 1.6
Specification Analysi
s
0.400...1.300 -
Vss
0.400...1.300 -
Vss
0.400...1.300 -
Vss
0.400...1.300 -
Vss