Skoda Octavia 1997 Workshop Manual page 18

01
Readout on -V.A.G 1552-
17931
Crash signal from air-
bag CU
17932
Fuel pump relay -J17
17948
Vehicle speed signal
17954
Charge pressure con-
trol solenoid valve -
N75
17957
Charge pressure con-
trol solenoid valve -
N75
17958
Charge pressure
17964
Charge pressure con-
trol
17965
Charge pressure con-
trol
17977
Cruise control system
switch -E45
17978
Engine control unit
1)
blocked
18008
Voltage supply termi-
nal 15
18009
Voltage supply relay
2)
terminal 30 -J317
18017
Crash disconnect acti-
vated
18020
Engine control unit
18024
Glow period warning
lamp -K29
18025
Glow period warning
lamp -K29
01-2 4
page
OCTAVIA 1997
Rectifying fault
Implausible sig- –
Test airbag system
nal
Open circuit or –
Testing fuel pump relay -J17-
short circuit to
Fault Finding and Fitting Locations
earth
Signal too high –
Test vehicle speed signal
–
Test CAN databus lines
–
Test dash panel insert
Short circuit to –
Test charge pressure control solenoid valve -N75- with final control
positive
diagnosis
Open circuit or
short circuit to
earth
Control differ- –
Test charge pressure control solenoid valve - N75- with final control
ence
diagnosis
Regulating limit
–
Reading measured value block, display group 010
not reached
–
Test charge pressure control
Components; Rep. Gr. 21
Regulating limit
exceeded
–
Implausible sig-
Analyse measured value block, display groups 006 and 022
nal
–
Read out fault memory of the electrical system control unit
–
Adapt diesel direct injection system control unit - J248- to electronic
immobiliser
–
Test immobiliser
Voltage too low –
Test voltage supply for diesel direct injection system control unit
-J248-
Implausible sig- –
Test diesel direct injection system relay -J322-
nal
grams, Electrical Fault Finding and Fitting Locations
–
Read out fault memory of airbag control unit
Rep. Gr. 01
–
Replace airbag control unit
Incorrectly cod- –
Code diesel direct injection system control unit -J248-
ed
–
Short circuit to
Test glow period warning lamp -K29- with final control diagnosis
positive
Open circuit or
short circuit to
earth
1.9/74 kW (TDI) Engine, Fuel Injection and Glow Plug System
Body Work; Rep. Gr. 01
Electrical System; Rep. Gr. 90
Chap. 01-1
Chap. 01-1
Chap. 01-4
Electrical System; Rep. Gr. 90
Electrical System; Rep. Gr. 96
Electrical System; Rep. Gr. 96
Chap. 23-5
Chap. 01-1
Self-diagnosis II
Current Flow Diagrams, Electrical
Chapter 23-6
Chapter 23-6
1.9/74 kW (TDI) Engine, Mechanical
Current Flow Dia-
Body Work;
Body Work; Rep. Gr. 69
Chap. 01-4
Chap. 23-5
Edition 12.03
S00.5139.52.20