Skoda Octavia 1997 Workshop Manual page 18

01
Readout on
-V.A.G 1552 -
16894
Idling speed switch
-F60-
16897
Immobilizer
16944
Voltage supply
16946
Voltage supply
16947
Voltage supply
16952
CCS switch -E45-
16955
Brake light switch -F
16984
Databus drive
16985
Control unit defective
16986
Control unit program-
ming
16988
Control unit defective
16989
Control unit defective
16990
Control unit defective
17022
Throttle valve control
unit -J338-
17026
Knock control
17069
Main relay -J271-
17070
Main relay -J271-
17071
Main relay -J271-
01-2 6
page
OCTAVIA 1997
Rectifying fault
–
Malfunction
Test throttle valve control unit
–
Replace engine control unit
–
incorrect code
Adapt engine control unit to electronic immobiliser
number
tem; Rep. Gr. 96.
Implausible –
Check wiring and plug connections according to the current flow dia-
signal
gram
Locations
–
Voltage too
Inspect engine control unit power supply
low
–
procedure if voltage interrupted
–
Test alternator and battery
Voltage too –
Inspect engine control unit power supply
high
–
Test alternator and battery
–
Implausible
Read measured value block, display group 066
signal
Implausible –
Read measured value block, display group 066
signal
–
Check wiring and plug connections according to the current flow dia-
gram
–
missing mes-
Read measured value block, display groups 125 and 126
sage
01-7
–
Inspect databus
–
Perform automatic test sequence
–
Test earth cables according to current flow diagram
Diagrams, Electrical Fault Finding and Fitting Locations
–
Replace engine control unit
Malfunction –
Check parts of the engine control unit and the gearbox control unit
and replace the control unit if necessary
–
Test earth cables according to current flow diagram
Diagrams, Electrical Fault Finding and Fitting Locations
–
Replace engine control unit
–
Implausible
Test throttle valve control unit
signal
Control unit –
Replace engine control unit
defective
Open circuit –
Test the power supply relay -J271- for the engine control unit
Current Flow Diagrams, Electrical Fault Finding and Fitting Loca-
tions
Short circuit to
earth
Short circuit to
positive
2,0 l/85 kW Engine, Fuel Injection and Ignition System
Current Flow Diagrams, Electrical Fault Finding and Fitting
Chapter 24-5
Self-diagnosis II
Chapter 24-2
Chapter 24-4
Electrical Sys-
Chapter 24-4
Chapter 24-4
Electrical System; Rep. Gr. 27
Chapter 24-4
Electrical System; Rep. Gr. 27
Chapter 01-7
Chapter 01-7
Chapter 01-1
Chapter 24-4
Chapter 24-4
Chapter 24-2
Chapter 24-4
Chapter
Current Flow
Current Flow
Edition 01.04
S00.5128.53.20