Skoda Octavia1999 User manual

Service
Workshop Manual
OCTAVIA
Service Department. Technical Information
S00.5126.50.20 E ition 07.99
1.4-ltr./44 kW Engine, Simos 3PB Fuel
Injection an Ignition System

The Service Manual is intended only for use within the koda Organisation;
it is not permitted to pass it onto third persons.
© 1999 KODA AUTO a. s.
Printed in CR

Service
List of Supplements for
OCTAVIA Workshop Manual Edition: 06.00
1.4-ltr. 44 kW Engine, Simos 3PB Fuel Injection and Ignition
System
Replaces List of Supplements - Edition: 07.99
Supple- Edition Subject Article Number
ment
07.99 Basic Edition Workshop Manual S00.5126.50.20
1 06.00 Supplement to Basic Edition S00.5126.51.20
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Contents ⇒ next page.
The Workshop Manual is intended only for use within
the koda Organisation; it is not permitted to pass it
on to third parties.
© 2000 KODA AUTO a. s.
Printed in CR
S00.5126.51.20

Edition 07.99
S00.5126.50.20
------------ 1 ------------
OCTAVIA Service
Contens
01 Self-diagnosis Page
Self-diagnosis .............................................................................................................................. 01-1
- Features of self-diagnosis ........................................................................................................ 01-1
- Technical data of self-diagnosis ............................................................................................... 01-1
- Connecting vehicle system tester V.A.G 1552 and selecting engine electronics control unit .. 01-2
- nterrogating and erasing fault memory.................................................................................... 01-4
- Fault table ................................................................................................................................. 01-6
- Final control diagnosis .............................................................................................................. 01-30
- Reading measured value block ................................................................................................ 01-32
- Reading measured value block: display groups 000 to 010 ..................................................... 01-33
- Reading measured value block: display groups 011 to 055 ..................................................... 01-37
2 Fuel Formation/Fuel Injection Page
Servicing Fuel Injection System ................................................................................................ 2 -1
- Safety precautions .................................................................................................................... 24-1
- Rules for cleanliness ................................................................................................................ 24-2
- Technical data .......................................................................................................................... 24-2
- Survey of fitting locations ......................................................................................................... 24-3
- General information on fuel injection system ........................................................................... 24-7
- Removing and installing parts of the fuel injection system ....................................................... 24-8
- Disassembling and assembling fuel rail and injectors ............................................................. 24-10
- Disassembling and assembling intake manifold ...................................................................... 24-10
- Disassembling and assembling air filter ................................................................................... 24-11
- Testing cables and components with test box V.A.G 1598/31 ................................................. 24-12
- Replacing engine control unit ................................................................................................... 24-14
- Testing idling speed .................................................................................................................. 24-15
- Testing operating states of engine............................................................................................ 24-17
- Testing fuel pressure regulator and holding pressure .............................................................. 24-19
- Testing intake system for leaks (unmetered air) ...................................................................... 24-22
- Testing injectors........................................................................................................................ 24-23
- Testing injected quantity, leaktightness and spray pattern of injectors ..................................... 24-25
- Testing fuel pump relay -J17 and actuation .............................................................................. 24-27
- Testing intake manifold pressure sender -G71 ........................................................................ 24-30
- Testing intake manifold temperature sender -G72 ................................................................... 24-31
- Testing coolant temperature sender -G62 ................................................................................ 24-34
- Testing voltage supply for control unit ...................................................................................... 24-38
- Adapting engine electronics control unit to electronic immobiliser ........................................... 24-39
Testing lambda control ............................................................................................................... 2 - 1
- Operation of lambda control ..................................................................................................... 24-41
- Testing lambda probe heater .................................................................................................... 24-47
Testing fuel tank ventilation ....................................................................................................... 2 - 9
- Testing solenoid valve 1 for activated charcoal filter ................................................................ 24-49
Testing electronic power control (electronic throttle) ............................................................. 2 -52
- Operation of electronic throttle system ..................................................................................... 24-52
- Meaning of EPC warning lamp (electronic throttle control fault lamp) in dash panel insert ..... 24-53
- Testing electronic throttle control fault lamp -K132 .................................................................. 24-54
- Testing throttle valve control unit -J338 .................................................................................... 24-56
- Conducting adaptation of throttle valve control unit ................................................................. 24-56
- Testing angle senders for throttle valve drive ........................................................................... 24-59
- Testing accelerator pedal position sender ................................................................................ 24-62

Service OCTAVIA
Edition 07.99
S00.5126.50.20
------------ 11 ------------
Testing additional signals .......................................................................................................... 24-65
- Testing engine speed signal ..................................................................................................... 24-65
- Testing fuel consumption signal for multifunction display......................................................... 24-65
- Testing road speed signal ......................................................................................................... 24-65
- Testing brake light switch -F and brake pedal switch -F47 ....................................................... 24-67
- Testing clutch pedal switch -F 6- ............................................................................................. 24-71
- Testing power steering pressure switch -F88- .......................................................................... 24-7
- Testing databus (CAN bus) ...................................................................................................... 24-75
2 Ignition System Page
Testing ignition system .............................................................................................................. 2 -1
- General information on ignition system .................................................................................... 28-1
- Safety precautions .................................................................................................................... 28-1
- Setting data of spark plugs ....................................................................................................... 28-2
- Removing and installing ignition system .................................................................................. 28-
- Testing ignition coils with power output stage .......................................................................... 28-4
- Testing camshaft position sensor -G16 .................................................................................. 28-6
- Testing knock sensor -G61 ...................................................................................................... 28-8
- Testing engine speed sender -G28 .......................................................................................... 28-10

Edition 06.00
S00.5126.51.20
------------ 1 ------------
OCTAVIA Service
Contents
01 Self-diagnosis Page
Self-diagnosis .............................................................................................................................. 01-1
- Features of self-diagnosis ........................................................................................................ 01-1
- Technical data of self-diagnosis ............................................................................................... 01-1
- Connecting vehicle system tester V.A.G 1552 and selecting engine electronics control unit .. 01-2
- nterrogating and erasing fault memory.................................................................................... 01-4
- Fault table ................................................................................................................................. 01-6
- Final control diagnosis .............................................................................................................. 01-30
- Reading measured value block ................................................................................................ 01-32
- Reading measured value block: display groups 000 to 010 ..................................................... 01-33
- Reading measured value block: display groups 011 to 055 ..................................................... 01-37
24 uel ormation/ uel Injection Page
Servicing uel Injection System ................................................................................................ 24-1
- Safety precautions .................................................................................................................... 24-1
- Rules for cleanliness ................................................................................................................ 24-2
- Technical data .......................................................................................................................... 24-2
- Survey of fitting locations ......................................................................................................... 24-3
- General information on fuel injection system ........................................................................... 24-7
- Removing and installing parts of the fuel injection system ....................................................... 24-8
- Disassembling and assembling fuel rail and injectors ............................................................. 24-10
- Disassembling and assembling intake manifold ...................................................................... 24-10
- Disassembling and assembling air filter ................................................................................... 24-11
- Testing cables and components with test box V.A.G 1598/31 ................................................. 24-12
- Replacing engine control unit ................................................................................................... 24-14
- Testing idling speed .................................................................................................................. 24-15
- Testing operating states of engine............................................................................................ 24-17
- Testing fuel pressure regulator and holding pressure .............................................................. 24-19
- Testing intake system for leaks (unmetered air) ...................................................................... 24-22
- Testing injectors........................................................................................................................ 24-23
- Testing injected quantity, leaktightness and spray pattern of injectors ..................................... 24-25
- Testing fuel pump relay -J17 and actuation .............................................................................. 24-27
- Testing intake manifold pressure sender (G71) ....................................................................... 24-30
- Testing intake manifold temperature sender (G72) .................................................................. 24-31
- Testing coolant temperature sender (G62)............................................................................... 24-35
- Testing voltage supply for control unit ...................................................................................... 24-38
- Adapting engine electronics control unit to electronic immobiliser ........................................... 24-39
Testing lambda control ............................................................................................................... 24-41
- Operation of lambda control ..................................................................................................... 24-41
- Testing lambda probe heater .................................................................................................... 24-47
Testing fuel tank ventilation ....................................................................................................... 24-49
- Testing solenoid valve 1 for activated charcoal filter ................................................................ 24-49
Testing electronic power control (electronic throttle) ............................................................. 24-52
- Operation of electronic throttle system ..................................................................................... 24-52
- Meaning of EPC warning lamp (electronic throttle control fault lamp) in dash panel insert ..... 24-53
- Testing electronic throttle control fault lamp -K132 .................................................................. 24-54
- Testing throttle valve control unit -J338- ................................................................................... 24-56
- Conducting adaptation of throttle valve control unit ................................................................. 24-56
- Testing angle senders for throttle valve drive ........................................................................... 24-59
- Testing accelerator pedal position sender ................................................................................ 24-62

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OCTAVIA Self-Diagnosis 01
Edition 07.99
S00.5126.50.20
------------ 01-1 ------------
Self-diagnosis
Note:
Self-diagnosis monitors only a part of the fuel
injection and ignition system.
Features of self-diagnosis
The Simos 3PB control unit is equipped with a
fault memory. The fault memory is designed as
a permanent memory.
If faults occur at the monitored sensors or com-
ponents, these are stored in the fault memory
with an indication of the fault type.
Faults which occur only occasionally sporadi-
cally), appear in the display with the addition /
SP. The cause of a sporadic fault may be, for
example, a loose contact or a temporary open
circuit in the wiring. If a sporadic fault no longer
occurs within 40 engine starts, it is erased from
the fault memory.
These stored faults can be read with the vehi-
cle system tester V.A.G 1552 or with the fault
reader V.A.G 1551 ⇒ page 01-4.
After rectifying the fault or faults, the fault
memory must be erased ⇒ page 01-4.
Note:
The description which follows relates only to the
vehicle system tester V.A.G 155 using the pro-
gramme card 5.0 or higher.
Tec nical data of self-diagnosis
Interrogating control unit version
The control unit version is displayed when the
vehicle system tester V.A.G 1552 is connected
and the engine electronics control unit selected
⇒ page 01-2.
Functions available w en using ve icle sys-
tem tester V.A.G 1552
Please refer to the table which follows for the
conditions which must exist to allow you to se-
lect the desired functions.

OCTAVIA
01 Self-Diagnosis
Edition 06.00
S00.5126.51.20
------------ 01-4 ------------
Function Requirement
Ignition on Engine
idling
02 Interrogating fault yes1) yes
memory
03 Final control diagnosis yes no
04 Initiating basic setting yes2) no
05 Erasing fault memory yes yes
06 Ending output yes yes
08 eading measured yes yes
value block
1) Only if engine does not start (starter must
be operated for at least 6 seconds).
2) Must be carried out after completing the
following operations:
eplacing engine control unit, throttle valve
control unit or engine, or disconnecting
battery.
Connecting vehicle system tester
.A.G 1552 and selecting engine
electronics control unit
Special tools, testers and aids required
♦Vehicle system tester V.A.G 1552 with cable
V.A.G 1551/3
Test requirements
lBattery voltage at least 11 V
lFuses according to up-to-date current flow
diagram o.k.
lEarth connections at front of clutch housing
and at cylinder head o.k.
------------ 01-2 ------------

OCTAVIA Self-Diagnosis 01
Edition 07.99
S00.5126.50.20
------------ 01-3 ------------
047906033B 1.4 l SIMOS 3PB 00HSSC01 →
Coding 00001 WSC 00000
Test of vehicle systems HELP
Select function XX
Test of vehicle systems HELP
Enter address word XX
Procedure
K- Connect vehicle system tester V.A.G 1552
with cable V.A.G 1551/3.
After connecting the vehicle system tester:
- Either, depending on the function desired,
switch on the ignition
or
start the engine ⇒page 01-1, table of „Avail-
able Functions“.
Notes:
♦ If the readout which appears in the display
does not correspond to the procedure:
⇒Operating instructions of vehicle system
tester
♦
If „Error in data transmission!“ is displayed
because of an incorrect entry, unplug cable
at fault reader, plug in again and repeat these
steps.
KReadout in display:
Note:
Operate the vehicle system by referring to the
readout in the display.
- Press keys 0 and 1 for the address word
„Engine electronics“ and confirm the engine
with the key Q.
KThe control unit identification appears in the dis-
play (example):
♦047906033B = Part No. of control unit
♦1.4 l = Displacement of engine
♦SIMOS 3PB = System designation
♦HS = Manual gearbox
♦SC01 = Software number
- Press the →key.
KReadout in display:
- For the further procedure ⇒Repair Descrip-
tions.

OCTAVIA
01 Self-Diagnosis
Edition 07.99
S00.5126.50.20
------------ 01-4 ------------
Test of vehicle systems HELP
Select function XX
Interrogating and erasing fault
memory
Special tools, testers and aids required
♦Vehicle system tester V.A.G 1552 with cable
V.A.G 1551/3
Procedure
- Connect vehicle system tester V.A.G 1552
and select engine electronics (address word
01); engine idling for this step ⇒page 01-2.
Only if engine does not start:
- Switch on ignition.
KReadout in display:
- Press keys 0 and 2 for the function „Interro-
gate fault memory“ and confirm the entry with
the key Q.
KThe number of stored faults or „No fault recog-
nized!“ appears in the display.
If one or several faults are stored:
The stored faults are displayed one after the
other.
KReadout in display:
- Press keys 0 and 5 for the function „Erase
fault memory“ and confirm the entry with the
key Q.
Note:
If you have switched off the ignition between
„Interrogating fault memory“ and „Erasing fault
memory“, the fault memory is not erased.
Test of vehicle systems HELP
Select function XX
X faults recognized!

OCTAVIA Self-Diagnosis 01
Edition 07.99
S00.5126.50.20
------------




------------
KReadout in display:
- Press the →key.
- Press keys 0 and 6 for the function „End out-
put“ and confirm the entry with the key Q.
- Rectify the faults displayed by referring to the
fault table ⇒page 01-6.
- After rectifying the faults, it is then neces-
sary to carry out a road test.
The following operating conditions must be
met during this road test:
♦The coolant temperature must rise to mo-
re than 80 °C.
♦Once this temperature is reached, the fol-
lowing operating states must be achieved
several times:
Idling speed
Part load
Full load
Fuel shut-off on overrun.
♦At full throttle, the engine speed must rise
to more than 3500 rpm ⇒page 24-17.
- Once again, interrogate the fault memory of
the control unit.
If no fault is stored:
- Press the →key.
KReadout in display:
- Press keys 0 and 6 for the function „End
output“ and confirm the entry with the key Q.
Test of vehicle systems →
Fault memory is erased!
Test of vehicle systems HELP
Select function XX

OCTAVIA
01 Self-Diagnosis
Edition 06.00
S00.5126.51.20
------------ 01-6 ------------
Fault table
Notes:
♦The fault table is arranged according to the 5-digit fault
code shown on the left.
♦The SAE code (e.g. P0107) which is ositioned on the
right next to the fault code, should be ignored (a lies
at resent only to USA).
♦Ex lanations regarding fault ty es (e.g. o en or short
circuit to earth):
⇒Operating instructions of vehicle system tester
♦If com onents are shown as faulty:
Test cables and lug connections to these com onents,
and also earth cables of the system according to the
current flow diagram. Re lace com onent only if no
fault is also found in this case. This a lies in articular
to faults which are shown as s oradic (SP).
Readout on V.A.G 1552
16496
ntake air temperature
sender -G72
Signal too small
16497
ntake air temperature
sender -G72
Signal too large
16500
Coolant temperature sender
-G62
Implausible signal
Possible cause of fault
♦Short circuit to earth
♦Sender -G72 faulty
♦Short circuit to positive
♦Sender -G72 faulty
♦Coolant temperature
sender -G62 supplying
implausible signal be-
cause of loose contact, or
corrosion caused by
moisture in connector
♦Signal input in engine
control unit faulty control
unit faulty)
Rectifying fault
- Read measured value
block, display group 004,
display block 4
⇒ page 01-36.
- Test intake air temperature
sender ⇒ page 24-31.
- Read measured value
block, display group 004,
display block 4
⇒ page 01-36.
- Test intake air temperature
sender ⇒ page 24-31.
- Read measured value
block, display group 004,
display block 3
⇒ page 01-36.
- Test coolant temperature
sender ⇒ page 24-35.
- Replace engine control
unit ⇒ page 24-14.
Possible effects
♦Emergency mode, control
unit operating with substi-
tute temperature
♦Emergency mode, control
unit operating with substi-
tute temperature
♦Cold start problems at very
low temperatures
♦Poor driving characteristics
in warming-up phase
♦Increased fuel consump-
tion
♦Increased emission levels

OCTAVIA Self-Diagnosis 01
Edition 06.00
S00.5126.51.20
------------ 01-7 ------------
Readout on V.A.G 1552
16501
Coolant te perature sender
-G62
Signal too small
16502
Coolant te perature sender
-G62
Signal too large
16514
Bank 1, probe 1
Electrical fault in circuit
16515
Bank 1, probe 1
Voltage too small
Possible cause of fault
♦Short circuit to earth
♦Sender -G62 faulty
♦Short circuit to positive
♦Sender -G62 faulty
♦Open circuit in wiring or
short circuit to earth
♦Lambda probe faulty
♦Short circuit of lambda
probe signal cable to
earth or to screening
♦Short circuit of lambda
probe signal cable to
earth or to screening
♦Lambda probe faulty
Possible effects
♦old start problems at very
low temperatures
♦Poor driving characteristics
in warming-up phase
♦Increased fuel consump-
tion
♦Increased emission levels
♦old start problems at very
low temperatures
♦Poor driving characteristics
in warming-up phase
♦Increased fuel consump-
tion
♦Increased emission levels
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦Increased emission levels
♦Increased fuel consump-
tion
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦Emission levels not o.k.
♦Increased fuel consump-
tion
Rectifying fault
- Read measured value
block, display group 004,
display block 3
⇒ page 01-36.
- Test coolant temperature
sender ⇒ page 24-35.
- Read measured value
block, display group 004,
display block 3
⇒ page 01-36.
- Test coolant temperature
sender ⇒ page 24-35.
- Rectify short circuit or
open circuit in wiring
⇒urrent Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test lambda control
⇒page 24-41.
- Rectify short circuit or
open circuit in wiring
⇒urrent Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test lambda control
⇒page 24-41.
- Read measured value
block, display group 030
⇒page 01-38.
- Read measured value
block, display group 031
⇒page 01-39.

OCTAVIA
01 Self-Diagnosis
Edition 06.00
S00.5126.51.20
------------ 01-8 ------------
Readout on V.A.G 1552
16516
Bank 1, p obe 1
Voltage too large
16517
Bank 1, p obe 1
Signal too slow
16518
Bank 1, p obe 1
No activity
Possible cause of fault
♦Short circuit of signal ca-
ble to positive
♦Lambda probe faulty
♦Lambda probe faulty
♦Lambda probe faulty
(dirty)
♦Open circuit in wiring be-
tween probe heater and
engine control unit
♦Lambda probe heater not
operating
Possible effects
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦mission levels not o.k.
♦Increased fuel consump-
tion
♦Increased fuel consump-
tion
♦mission levels not o.k.
♦Carbon deposits on spark
plugs
Rectifying fault
- Rectify short circuit or
open circuit in wiring
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test lambda control
⇒page 24-41.
- Test lambda control
⇒page 24-41.
- Read measured value
block, display group 030
⇒page 01-38.
- Read measured value
block, display group 031
⇒page 01-39.
- Test lambda probe heater
⇒ page 24-47.
Note on fault codes 16500 - 16502:
As soon as one of the faults is recognised, the control unit
uses a substitute value from the model map stored in the
control unit.

OCTAVIA Self-Diagnosis 01
Edition 06.00
S00.5126.51.20
------------ 01-9 ------------
Readout on V.A.G 1552
1655
Bank 1, fuel metering sys-
tem
Malfunction
16555
Bank 1, fuel metering sys-
tem
System too lean
Possible cause of fault
♦Fuel pressure regulator
faulty
♦Injectors faulty
♦Fuel system faulty
♦Lambda probe faulty
Possible effects
♦Engine does not start
♦Increased emission levels
♦Poor starting characteris-
tics
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦Emission levels not o k
♦Increased fuel consump-
tion
Rectifying fault
- Test fuel pressure regula-
tor and holding pressure
⇒page 24-19
- Test injectors
⇒ page 24-23
- Test injected quantity and
leaktightness
⇒ page 24-25
- Test fuel pump:
⇒1 4-ltr /44 kW Engine, Me-
chanical Components;
Repair Group 20; Testing
fuel pump
- Inspect intake system for
leaks ⇒ page 24-22
- Test exhaust system for
leaks:
⇒1 4-ltr /44 kW Engine, Me-
chanical Components;
Repair Group 26; Remov-
ing and installing parts of
exhaust system
- Inspect vacuum lines for
leaks
- Test fuel pressure regula-
tor and holding pressure
⇒page 24-19
- Test lambda control
⇒page 24-41
- Read measured value
block, display group 030
⇒page 01-38
- Read measured value
block, display group 031
⇒page 01-39

OCTAVIA
01 Self-Diagnosis
Edition 06.00
S00.5126.51.20
------------ 01-10 ------------
Readout on V.A.G 1552
16556
Bank 1, fuel mete ing sys-
tem
System too rich
16705
Engine speed sende -G28
Implausible signal
16706
Engine speed sende -G28
No signal
16711
Knock senso 1 -G61
Signal too small
16712
Knock senso 1 -G61
Signal too large
Possible cause of fault
♦Fuel system faulty
♦Lambda probe faulty
♦Engine speed sender
-G28 loose
♦Signal cable has open cir-
cuit or short circuit to earth
or to positive
♦Earth cable has open cir-
cuit or short circuit to posi-
tive
♦-G28 loose or faulty
♦Open circuit to screening
of -G28
♦Signal input in engine con-
trol unit faulty (control unit
faulty)
♦Knock sensor faulty
♦Short circuit to earth
♦Knock sensor faulty
♦Short circuit to earth
Possible effects
♦Lambda closed-loop con-
trol switches to open-loop
♦Poor idling
♦Engine misfires
♦Engine does not start
♦Engine cuts out
♦High fuel consumption
♦Reduced power
♦High fuel consumption
♦Reduced power
Rectifying fault
- Test fuel pressure regula-
tor and holding pressure
⇒page 24-19.
- Test lambda control
⇒page 24-41.
- Read measured value
block display group 030
⇒page 01-38.
- Test lambda control
⇒page 24-41.
- Test engine speed sender
-G28 ⇒ page 28-10.
- Rectify open circuit in wir-
ing or short circuit.
⇒Current Flow Diagrams
Fault Finding and Fitting
Locations binder
- Test engine speed sender
-G28 ⇒ page 28-10.
- Replace engine control
unit ⇒ page 24-14.
- Test knock sensor -G61
⇒page 28-8.
- Test knock sensor -G68
⇒page 28-8.

OCTAVIA Self-Diagnosis 01
Edition 06.00
S00.5126.51.20
------------ 01-11 ------------
Readout on V.A.G 1552
16 19
Engine speed sender -G28
Malfunction
16 25
Camshaft position sensor
=> sender -G40
Implausible signal
16 26
Camshaft position sensor
=> sender -G40
Signal too small
Possible cause of fault
♦Short circuit of lambda
probe signal wire to earth
or to screening
♦Earth cable has open cir-
cuit or short circuit to posi-
tive
♦-G28 loose, or faulty
♦pen circuit to screening
of -G28
♦Signal input in engine con-
trol unit faulty (control unit
faulty)
♦Voltage supply or earth
supply for camshaft posi-
tion sensor -G1631) faulty
♦-G163 faulty
♦Signal input in engine con-
trol unit faulty (control unit
faulty)
♦pen circuit or short circuit
to earth or to positive in
signal cable between
-G163 and engine control
unit
♦Timing chain stretched
(engines with high mile-
age)
♦-G1631) faulty
♦Large contact resistances
in connectors (corrosion)
Possible effects
♦Engine does not start
♦Engine cuts out
♦Engine does not rev up to
maximum speed
♦Poor performance
♦Start problems
♦Valve timing loud, reduced
engine output
♦Engine does not rev up to
maximum speed
♦Poor performance
♦Start problems
Rectifying fault
- Rectify open circuit in wir-
ing or short circuit.
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test engine speed sender
-G28 ⇒ page 28-10.
- Replace engine control
unit ⇒ page 24-14.
- Test camshaft position sen-
sor -G163 ⇒ page 28-6
- Rectify open circuit in wir-
ing or short circuit accord-
ing to current flow diagram
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Read measured value
block, display group 012;
check readouts in display
blocks 3 and 4
⇒ page 01-37.
- Test camshaft position
sensor -G163
⇒ page 28-6.
- Test cable connection or
wiring to -G163
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
1) The camshaft position sensor -G163 is identical with the Hall sender -G40.

OCTAVIA
 

S00.5126.51.20
------------ 01-12 ------------


 
Flow faulty


Implausible signal

♦-N80 faulty
♦Open circuit in wiring or
short circuit
♦Vehicle speed sender
faulty
♦Open circuit in wiring or
short circuit between vehi-
cle speed sender and
speedometer
♦Open circuit in wiring or
short circuit between dash
panel insert and engine
control unit

♦Irregular idling
♦Smell of fuel
♦rief variation between
idling speed and specified
speed
♦Poor load change charac-
teristics
♦Malfunction in systems
which use vehicle speed
signal
 
- Test activated charcoal fil-
ter solenoid valve ⇒ page
01-30, Final control diag-
nosis
⇒1.4-ltr./44 kW Engine, Me-
chanical Components;
Repair Group 20; Remov-
ing and installing acti-
vated charcoal filter
- Inspect hoses and connec-
tion pipes from fuel tank
up to throttle valve control
unit.
⇒1.4-ltr./44 kW Engine, Me-
chanical Components;
Repair Group 20; Remov-
ing and installing fuel tank
with attached parts and
fuel filter
- Rectify open circuit in wir-
ing or short circuit accord-
ing to CFD
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Read measured value
block, display group 005,
display block 3
⇒ page 01-36.
- Rectify open circuit in wir-
ing or short circuit.
⇒Current Flow Diagrams,
Fault Finding and Fitting
Locations binder
- Test vehicle speed signal
⇒ page 24-65.