Skoda OCTAVIA 2004 Workshop Manual page 19

OCTAVIA
Readout on V.A.G 1552
Fault number
old new
00625 16885
Speed signal
Implausible sig-
nal
If necessary
Vehicle speed sig-
nal
Implausible sig-
nal
17948
Vehicle speed sig-
nal
Signal too great
00626 18024
Glow period warn-
ing lamp -K29
Short-circuit to
positive
18025
Line interrup-
tion/short-circuit
to earth
00668 18009
Onboard voltage,
terminal 30
Implausible sig-
nal
00671
Cruise control
system switch
-E45
Undefined
switch status
Edition 09.03
S00.5111.55.20
Possible cause of fault
♦ Line interruption between
speedometer sender -G22
and dash panel insert
♦ -G22 defective
♦ Speedometer -G21 defec-
tive
♦ Line interruption between
dash panel insert and en-
gine control unit
♦ Short-circuit to positive
♦ Line interruption
♦ Bulb defective
♦ Short-circuit to earth
♦ Diesel direct injection sys-
tem relay -J322 jams
-
♦ E45 defective
♦ Line interruption or short-
circuit
Self-Diagnosis
Possible effects
♦ CCS not operational
♦ Air conditioning not opera-
tional
♦ Possible load alteration
shock
♦ Glow period warning lamp
not operational
♦ Glow period warning lamp
not operational
♦ Glow period warning lamp
lights up constantly
♦ Engine does not start
(safety deactivation)
♦ Cruise control system not
operational
Rectifying fault
- Check speed signal
page 23-52
- Check speedometer
sender
Electrical System; Repair
Group 90
- Check glow period warn-
ing lamp page 28-2
- Test voltage supply for die-
sel direct injection system
page 23-38
- Check cruise control sys-
tem page 23-55
- Reading measured value
block 6 page 01-35
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